mirror of
https://github.com/ChronosX88/JGUN.git
synced 2024-11-09 16:51:02 +00:00
[WIP] Added base for futures, builders, and big refactoring
This commit is contained in:
ChronosX88
parent
d085b9f80d
commit
7d61993a3c
@ -1,2 +1,2 @@
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rootProject.name = 'GunJava'
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rootProject.name = 'JGUN'
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@ -1,86 +0,0 @@
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package io.github.chronosx88.GunJava;
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import io.github.chronosx88.GunJava.storageBackends.MemoryBackend;
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import io.github.chronosx88.GunJava.storageBackends.StorageBackend;
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import org.java_websocket.client.WebSocketClient;
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import org.java_websocket.handshake.ServerHandshake;
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import org.json.JSONObject;
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import java.net.InetAddress;
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import java.net.URI;
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import java.net.URISyntaxException;
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public class Client extends WebSocketClient {
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private Dup dup = new Dup();
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private StorageBackend graph = new MemoryBackend();
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public Client(InetAddress address, int port) throws URISyntaxException {
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super(new URI("ws://" + address.getHostAddress() + ":" + port));
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}
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@Override
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public void onOpen(ServerHandshake handshakeData) {
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System.out.println("Connection open. Status: " + handshakeData.getHttpStatus());
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Utils.setTimeout(() -> {
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JSONObject msg = new JSONObject();
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msg
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.put("#", dup.track(Dup.random()))
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.put("get", new JSONObject()
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.put("#", "FDSA")
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.put(".", "species"));
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this.send(msg.toString());
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}, 2000);
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Utils.setTimeout(() -> {
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JSONObject msg = new JSONObject();
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msg.put("#", dup.track(Dup.random()));
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msg.put("put", new JSONObject()
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.put("ASDF", Utils.newNode("ASDF", new JSONObject()
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.put("name", "Mark Nadal")
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.put("boss", new JSONObject().put("#", "FDSA"))).toJSONObject())
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.put("FDSA", Utils.newNode("FDSA", new JSONObject().put("name", "Fluffy").put("species", "a kitty").put("slave", new JSONObject().put("#", "ASDF"))).toJSONObject()));
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this.send(msg.toString());
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}, (int) (1000 * Math.random()));
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Utils.setTimeout(() -> {
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JSONObject msg = new JSONObject();
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msg.put("#", dup.track(Dup.random()));
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msg.put("put", new JSONObject()
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.put("ASDF", Utils.newNode("ASDF", new JSONObject()
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.put("name", "Mark")).toJSONObject())
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.put("FDSA", Utils.newNode("FDSA", new JSONObject().put("species", "felis silvestris").put("color", "ginger")).toJSONObject()));
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this.send(msg.toString());
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}, (int) (1000 * Math.random()));
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}
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@Override
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public void onMessage(String message) {
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JSONObject msg = new JSONObject(message);
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if(dup.check(msg.getString("#"))){ return; }
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dup.track(msg.getString("#"));
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if(msg.opt("put") != null) {
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HAM.mix(new MemoryBackend(msg.getJSONObject("put")), graph);
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}
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if(msg.opt("get") != null) {
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MemoryBackend getResults = Utils.getRequest(msg.getJSONObject("get"), graph);
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JSONObject ack = new JSONObject()
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.put("#", dup.track(Dup.random()))
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.put("@", msg.getString("#"))
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.put("put", getResults.toJSONObject());
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this.send(ack.toString());
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}
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System.out.println("---------------");
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System.out.println(msg.toString(2));
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this.send(message);
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}
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@Override
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public void onClose(int code, String reason, boolean remote) {
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System.out.println("Connection closed. Code/reason/remote: " + code + "/" + reason + "/" + remote);
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}
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@Override
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public void onError(Exception ex) {
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System.out.println("Terrible fail: ");
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ex.printStackTrace();
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}
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}
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@ -1,12 +0,0 @@
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package io.github.chronosx88.GunJava;
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import java.net.Inet4Address;
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import java.net.URISyntaxException;
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import java.net.UnknownHostException;
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public class MainClient {
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public static void main(String[] args) throws URISyntaxException, UnknownHostException {
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Client client = new Client(Inet4Address.getByAddress(new byte[]{127, 0, 0, 1}), 5054);
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client.connect();
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}
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}
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@ -1,14 +0,0 @@
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package io.github.chronosx88.GunJava;
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import java.net.Inet4Address;
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import java.net.URISyntaxException;
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import java.net.UnknownHostException;
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public class MainClientServer {
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public static void main(String[] args) throws URISyntaxException, UnknownHostException {
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Server server = new Server(21334);
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server.start();
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Client client = new Client(Inet4Address.getByAddress(new byte[]{127, 0, 0, 1}), 21334);
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client.connect();
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}
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}
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@ -1,8 +0,0 @@
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package io.github.chronosx88.GunJava;
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public class MainServer {
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public static void main(String[] args) {
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Server server = new Server(5054);
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server.start();
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}
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}
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62
src/main/java/io/github/chronosx88/JGUN/Dispatcher.java
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62
src/main/java/io/github/chronosx88/JGUN/Dispatcher.java
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@ -0,0 +1,62 @@
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package io.github.chronosx88.JGUN;
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import io.github.chronosx88.JGUN.futures.BaseFuture;
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import io.github.chronosx88.JGUN.nodes.Peer;
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import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
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import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
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import org.json.JSONObject;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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public class Dispatcher {
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private final Map<String, BaseFuture<? extends BaseFuture>> pendingFutures = new ConcurrentHashMap<>();
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private final StorageBackend graphStorage;
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private final Peer peer;
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public Dispatcher(StorageBackend graphStorage, Peer peer) {
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this.graphStorage = graphStorage;
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this.peer = peer;
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}
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public void addPendingFuture(BaseFuture<? extends BaseFuture> future) {
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pendingFutures.put(future.getFutureID(), future);
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}
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public void handleIncomingMessage(JSONObject message) {
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// FIXME
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}
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private JSONObject handleGet(JSONObject getData) {
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return null; // FIXME
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}
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private JSONObject handlePut(JSONObject putData) {
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return null; // FIXME
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}
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private void handleIncomingAck(JSONObject ack) {
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// FIXME
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}
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public void sendPutRequest(JSONObject data) {
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new Thread(() -> {
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InMemoryGraph graph = Utils.prepareDataForPut(data);
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peer.emit(Utils.formatPutRequest(graph.toJSONObject()).toString());
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}).start();
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}
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public void sendGetRequest(String key) {
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new Thread(() -> {
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JSONObject jsonGet = Utils.formatGetRequest(key, null);
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peer.emit(jsonGet.toString());
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}).start();
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}
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public void sendGetRequest(String key, String field) {
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new Thread(() -> {
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JSONObject jsonGet = Utils.formatGetRequest(key, field);
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peer.emit(jsonGet.toString());
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}).start();
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}
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}
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47
src/main/java/io/github/chronosx88/JGUN/Dup.java
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47
src/main/java/io/github/chronosx88/JGUN/Dup.java
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package io.github.chronosx88.JGUN;
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import java.util.Map;
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import java.util.Random;
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import java.util.UUID;
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import java.util.concurrent.ConcurrentHashMap;
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public class Dup {
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private static char[] randomSeed = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
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private static Random random = new Random(System.currentTimeMillis());
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private Map<String, Long> s = new ConcurrentHashMap<>();
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private DupOpt opt = new DupOpt();
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private Thread to = null;
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public Dup() {
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opt.max = 1000;
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opt.age = 1000 * 9;
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}
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public String track(String id) {
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s.put(id, System.currentTimeMillis());
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if(to == null) {
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Utils.setTimeout(() -> {
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for(Map.Entry<String, Long> entry : s.entrySet()) {
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if(opt.age > (System.currentTimeMillis() - entry.getValue()))
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continue;
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s.remove(entry.getKey());
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}
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to = null;
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}, opt.age);
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}
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return id;
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}
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public boolean check(String id) {
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if(s.containsKey(id)) {
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track(id);
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return true;
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} else {
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return false;
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}
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}
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public static String random() {
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return UUID.randomUUID().toString();
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}
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}
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6
src/main/java/io/github/chronosx88/JGUN/DupOpt.java
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6
src/main/java/io/github/chronosx88/JGUN/DupOpt.java
Normal file
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package io.github.chronosx88.JGUN;
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public class DupOpt {
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public int max;
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public int age;
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}
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164
src/main/java/io/github/chronosx88/JGUN/HAM.java
Normal file
164
src/main/java/io/github/chronosx88/JGUN/HAM.java
Normal file
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package io.github.chronosx88.JGUN;
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import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
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import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
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import org.json.JSONObject;
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import java.util.Map;
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public class HAM {
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private static long defer = Long.MAX_VALUE;
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static class HAMResult {
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public boolean defer = false;
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public boolean historical = false;
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public boolean converge = false;
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public boolean incoming = false;
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public boolean current = false;
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public boolean state = false;
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public String err = null;
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}
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public static HAMResult ham(long machineState, long incomingState, long currentState, Object incomingValue, Object currentValue) {
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HAMResult result = new HAMResult();
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if(machineState < incomingState) {
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result.defer = true;
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return result;
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}
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if(incomingState < currentState){
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result.historical = true;
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return result;
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}
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if(currentState < incomingState) {
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result.converge = true;
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result.incoming = true;
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return result;
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}
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if(incomingState == currentState) {
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if(incomingValue.equals(currentValue)) {
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result.state = true;
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return result;
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}
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if((incomingValue.toString().compareTo(currentValue.toString())) < 0) {
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result.converge = true;
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result.current = true;
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return result;
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}
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if((currentValue.toString().compareTo(incomingValue.toString())) < 0) {
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result.converge = true;
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result.incoming = true;
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return result;
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}
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}
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result.err = "Invalid CRDT Data: "+ incomingValue +" to "+ currentValue +" at "+ incomingState +" to "+ currentState +"!";
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return result;
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}
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public static InMemoryGraph mix(InMemoryGraph change, StorageBackend data) {
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long machine = System.currentTimeMillis();
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InMemoryGraph diff = null;
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for(Map.Entry<String, Node> entry : change.entries()) {
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Node node = entry.getValue();
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for(String key : node.values.keySet()) {
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Object value = node.values.get(key);
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if ("_".equals(key)) { continue; }
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long state = node.states.getLong(key);
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long was = -1;
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Object known = null;
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if(data == null) {
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data = new InMemoryGraph();
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}
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if(data.hasNode(node.soul)) {
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if(data.getNode(node.soul).states.opt(key) != null) {
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was = data.getNode(node.soul).states.getLong(key);
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}
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known = data.getNode(node.soul).values.opt(key) == null ? 0 : data.getNode(node.soul).values.opt(key);
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}
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HAMResult ham = ham(machine, state, was, value, known);
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if(!ham.incoming) {
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if(ham.defer) {
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System.out.println("DEFER: " + key + " " + value);
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// Hack for accessing value in lambda without making the variable final
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StorageBackend[] graph = new StorageBackend[] {data};
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Utils.setTimeout(() -> mix(node, graph[0]), (int) (state - System.currentTimeMillis()));
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}
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continue;
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}
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if(diff == null) {
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diff = new InMemoryGraph();
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}
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if(!diff.hasNode(node.soul)) {
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diff.addNode(node.soul, Utils.newNode(node.soul, new JSONObject()));
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}
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if(!data.hasNode(node.soul)) {
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data.addNode(node.soul, Utils.newNode(node.soul, new JSONObject()));
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}
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data.getNode(node.soul).values.put(key, value);
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diff.getNode(node.soul).values.put(key, value);
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diff.getNode(node.soul).states.put(key, state);
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data.getNode(node.soul).states.put(key, state);
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}
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}
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return diff;
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}
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public static InMemoryGraph mix(Node incomingNode, StorageBackend data) {
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long machine = System.currentTimeMillis();
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InMemoryGraph diff = null;
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for(String key : incomingNode.values.keySet()) {
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Object value = incomingNode.values.get(key);
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if ("_".equals(key)) { continue; }
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long state = incomingNode.states.getLong(key);
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long was = -1;
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Object known = null;
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if(data == null) {
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data = new InMemoryGraph();
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}
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if(data.hasNode(incomingNode.soul)) {
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if(data.getNode(incomingNode.soul).states.opt(key) != null) {
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was = data.getNode(incomingNode.soul).states.getLong(key);
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}
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known = data.getNode(incomingNode.soul).values.opt(key) == null ? 0 : data.getNode(incomingNode.soul).values.opt(key);
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}
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HAMResult ham = ham(machine, state, was, value, known);
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if(!ham.incoming) {
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if(ham.defer) {
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System.out.println("DEFER: " + key + " " + value);
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// Hack for accessing value in lambda without making the variable final
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StorageBackend[] graph = new StorageBackend[] {data};
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Utils.setTimeout(() -> mix(incomingNode, graph[0]), (int) (state - System.currentTimeMillis()));
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}
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continue;
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}
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if(diff == null) {
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diff = new InMemoryGraph();
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}
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if(!diff.hasNode(incomingNode.soul)) {
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diff.addNode(incomingNode.soul, Utils.newNode(incomingNode.soul, new JSONObject()));
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}
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if(!data.hasNode(incomingNode.soul)) {
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data.addNode(incomingNode.soul, Utils.newNode(incomingNode.soul, new JSONObject()));
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}
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data.getNode(incomingNode.soul).values.put(key, value);
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diff.getNode(incomingNode.soul).values.put(key, value);
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diff.getNode(incomingNode.soul).states.put(key, state);
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data.getNode(incomingNode.soul).states.put(key, state);
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}
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return diff;
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}
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}
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76
src/main/java/io/github/chronosx88/JGUN/Node.java
Normal file
76
src/main/java/io/github/chronosx88/JGUN/Node.java
Normal file
@ -0,0 +1,76 @@
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package io.github.chronosx88.JGUN;
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import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
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import org.json.JSONObject;
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public class Node implements Comparable<Node> {
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public JSONObject values; // Data
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public JSONObject states; // Metadata for diff
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public String soul; // i.e. ID of node
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/**
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* Create a Peer from a JSON object.
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*
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* @param rawData JSON object, which contains the data
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*/
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public Node(JSONObject rawData) {
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this.values = new JSONObject(rawData.toString());
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this.states = values.getJSONObject("_").getJSONObject(">");
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this.soul = values.getJSONObject("_").getString("#");
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values.remove("_");
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}
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@Override
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public int compareTo(Node other) {
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return soul.compareTo(other.soul);
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}
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|
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@Override
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public boolean equals(Object other) {
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if (other == null)
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return false;
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if (other instanceof String)
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return soul.equals(other);
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if (other instanceof Node)
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return compareTo((Node) other) == 0;
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return false;
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}
|
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@Override
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public int hashCode() {
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return soul.hashCode();
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}
|
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|
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public boolean isNode(String key) {
|
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return values.optJSONObject(key) != null;
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}
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public Node getNode(String key, InMemoryGraph g) {
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String soulRef = values.getJSONObject(key).getString("#");
|
||||
return g.getNode(soulRef);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
JSONObject jsonObject = new JSONObject(values.toString());
|
||||
jsonObject.put("_", new JSONObject().put("#", soul).put(">", states));
|
||||
return jsonObject.toString();
|
||||
}
|
||||
|
||||
public JSONObject toJSONObject() {
|
||||
JSONObject jsonObject = new JSONObject(values.toString());
|
||||
jsonObject.put("_", new JSONObject().put("#", soul).put(">", states));
|
||||
return jsonObject;
|
||||
}
|
||||
|
||||
public JSONObject getMetadata() {
|
||||
JSONObject jsonObject = new JSONObject();
|
||||
jsonObject.put("_", new JSONObject().put("#", soul).put(">", states));
|
||||
return jsonObject;
|
||||
}
|
||||
|
||||
public void setMetadata(JSONObject metadata) {
|
||||
soul = metadata.getJSONObject("_").getString("#");
|
||||
states = metadata.getJSONObject("_").getJSONObject(">");
|
||||
}
|
||||
}
|
||||
29
src/main/java/io/github/chronosx88/JGUN/PathRef.java
Normal file
29
src/main/java/io/github/chronosx88/JGUN/PathRef.java
Normal file
@ -0,0 +1,29 @@
|
||||
package io.github.chronosx88.JGUN;
|
||||
|
||||
import io.github.chronosx88.JGUN.futures.builders.GetBuilder;
|
||||
import io.github.chronosx88.JGUN.futures.builders.PutBuilder;
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.util.ArrayList;
|
||||
|
||||
public class PathRef {
|
||||
private final ArrayList<String> path = new ArrayList<>();
|
||||
private Dispatcher dispatcher;
|
||||
|
||||
public PathRef(Dispatcher dispatcher) {
|
||||
this.dispatcher = dispatcher;
|
||||
}
|
||||
|
||||
public PathRef get(String key) {
|
||||
path.add(key);
|
||||
return this;
|
||||
}
|
||||
|
||||
public GetBuilder getData() {
|
||||
return new GetBuilder(path);
|
||||
}
|
||||
|
||||
public PutBuilder put(JSONObject data) {
|
||||
return new PutBuilder(dispatcher, data, path);
|
||||
}
|
||||
}
|
||||
100
src/main/java/io/github/chronosx88/JGUN/Utils.java
Normal file
100
src/main/java/io/github/chronosx88/JGUN/Utils.java
Normal file
@ -0,0 +1,100 @@
|
||||
package io.github.chronosx88.JGUN;
|
||||
|
||||
import io.github.chronosx88.JGUN.futures.builders.PutBuilder;
|
||||
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
|
||||
import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
|
||||
import org.json.JSONObject;
|
||||
|
||||
public class Utils {
|
||||
public static Thread setTimeout(Runnable runnable, int delay){
|
||||
Thread thread = new Thread(() -> {
|
||||
try {
|
||||
Thread.sleep(delay);
|
||||
runnable.run();
|
||||
}
|
||||
catch (Exception e){
|
||||
e.printStackTrace();
|
||||
}
|
||||
});
|
||||
thread.start();
|
||||
return thread;
|
||||
}
|
||||
|
||||
public static Node newNode(String soul, JSONObject data) {
|
||||
JSONObject states = new JSONObject();
|
||||
for (String key : data.keySet()) {
|
||||
states.put(key, System.currentTimeMillis());
|
||||
}
|
||||
data.put("_", new JSONObject().put("#", soul).put(">", states));
|
||||
return new Node(data);
|
||||
}
|
||||
|
||||
public static InMemoryGraph getRequest(JSONObject lex, StorageBackend graph) {
|
||||
String soul = lex.getString("#");
|
||||
String key = lex.optString(".", null);
|
||||
Node node = graph.getNode(soul);
|
||||
Object tmp;
|
||||
if(node == null) {
|
||||
return new InMemoryGraph();
|
||||
}
|
||||
if(key != null) {
|
||||
tmp = node.values.opt(key);
|
||||
if(tmp == null) {
|
||||
return new InMemoryGraph();
|
||||
}
|
||||
Node node1 = new Node(node.toJSONObject());
|
||||
node = Utils.newNode(node.soul, new JSONObject());
|
||||
node.setMetadata(node1.getMetadata());
|
||||
node.values.put(key, tmp);
|
||||
JSONObject tmpStates = node1.states;
|
||||
node.states.put(key, tmpStates.get(key));
|
||||
}
|
||||
InMemoryGraph ack = new InMemoryGraph();
|
||||
ack.addNode(soul, node);
|
||||
return ack;
|
||||
}
|
||||
|
||||
public static InMemoryGraph prepareDataForPut(JSONObject data) {
|
||||
InMemoryGraph result = new InMemoryGraph();
|
||||
for (String objectKey : data.keySet()) {
|
||||
JSONObject object = data.getJSONObject(objectKey);
|
||||
Node node = Utils.newNode(objectKey, object);
|
||||
prepareNodeForPut(node, result);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
private static void prepareNodeForPut(Node node, InMemoryGraph result) {
|
||||
for (String key : node.values.keySet()) {
|
||||
Object value = node.values.get(key);
|
||||
if(value instanceof JSONObject) {
|
||||
String soul = Dup.random();
|
||||
Node tmpNode = Utils.newNode(soul, (JSONObject) value);
|
||||
node.values.remove(key);
|
||||
node.values.put(key, new JSONObject().put("#", soul));
|
||||
prepareNodeForPut(tmpNode, result);
|
||||
result.addNode(soul, tmpNode);
|
||||
}
|
||||
}
|
||||
result.addNode(node.soul, node);
|
||||
}
|
||||
|
||||
public static JSONObject formatGetRequest(String key, String field) {
|
||||
JSONObject jsonObject = new JSONObject();
|
||||
jsonObject.put("#", Dup.random());
|
||||
JSONObject getParameters = new JSONObject();
|
||||
getParameters.put("#", key);
|
||||
if(field != null) {
|
||||
getParameters.put(".", field);
|
||||
}
|
||||
jsonObject.put("get", getParameters);
|
||||
return jsonObject;
|
||||
}
|
||||
|
||||
public static JSONObject formatPutRequest(JSONObject data) {
|
||||
JSONObject jsonObject = new JSONObject();
|
||||
jsonObject.put("#", Dup.random());
|
||||
jsonObject.put("put", data);
|
||||
return jsonObject;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,15 @@
|
||||
package io.github.chronosx88.JGUN.entrypoints;
|
||||
|
||||
import io.github.chronosx88.JGUN.nodes.GunPeer;
|
||||
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
|
||||
|
||||
import java.net.Inet4Address;
|
||||
import java.net.URISyntaxException;
|
||||
import java.net.UnknownHostException;
|
||||
|
||||
public class MainClient {
|
||||
public static void main(String[] args) throws URISyntaxException, UnknownHostException {
|
||||
GunPeer gunClient = new GunPeer(Inet4Address.getByAddress(new byte[]{127, 0, 0, 1}), 5054, new InMemoryGraph());
|
||||
gunClient.connect();
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,18 @@
|
||||
package io.github.chronosx88.JGUN.entrypoints;
|
||||
|
||||
import io.github.chronosx88.JGUN.nodes.GunPeer;
|
||||
import io.github.chronosx88.JGUN.nodes.GunSuperPeer;
|
||||
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
|
||||
|
||||
import java.net.Inet4Address;
|
||||
import java.net.URISyntaxException;
|
||||
import java.net.UnknownHostException;
|
||||
|
||||
public class MainClientServer {
|
||||
public static void main(String[] args) throws URISyntaxException, UnknownHostException {
|
||||
GunSuperPeer gunSuperNode = new GunSuperPeer(21334);
|
||||
gunSuperNode.start();
|
||||
GunPeer gunClient = new GunPeer(Inet4Address.getByAddress(new byte[]{127, 0, 0, 1}), 21334, new InMemoryGraph());
|
||||
gunClient.connect();
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,10 @@
|
||||
package io.github.chronosx88.JGUN.entrypoints;
|
||||
|
||||
import io.github.chronosx88.JGUN.nodes.GunSuperPeer;
|
||||
|
||||
public class MainServer {
|
||||
public static void main(String[] args) {
|
||||
GunSuperPeer gunSuperNode = new GunSuperPeer(5054);
|
||||
gunSuperNode.start();
|
||||
}
|
||||
}
|
||||
394
src/main/java/io/github/chronosx88/JGUN/futures/BaseFuture.java
Normal file
394
src/main/java/io/github/chronosx88/JGUN/futures/BaseFuture.java
Normal file
@ -0,0 +1,394 @@
|
||||
/*
|
||||
* Copyright 2019 Thomas Bocek
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
|
||||
* use this file except in compliance with the License. You may obtain a copy of
|
||||
* the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
* License for the specific language governing permissions and limitations under
|
||||
* the License.
|
||||
*/
|
||||
package io.github.chronosx88.JGUN.futures;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import java.io.PrintWriter;
|
||||
import java.io.StringWriter;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
import java.util.concurrent.CountDownLatch;
|
||||
|
||||
/**
|
||||
* The base for all BaseFuture implementations. Be aware of possible deadlocks. Never await from a listener. This class
|
||||
* is heavily inspired by MINA and Netty.
|
||||
*
|
||||
* @param <K>
|
||||
* The class that extends BaseFuture and is used to return back the type for method calls.
|
||||
* @author Thomas Bocek
|
||||
*/
|
||||
public abstract class BaseFuture<K extends BaseFuture> {
|
||||
private static final Logger LOG = LoggerFactory.getLogger(BaseFuture.class);
|
||||
|
||||
public enum FutureType {
|
||||
INIT, OK, FAILED, CANCEL
|
||||
}
|
||||
|
||||
// Listeners that gets notified if the future finished
|
||||
private final List<BaseFutureListener<? extends BaseFuture>> listeners = new ArrayList<>(1);
|
||||
|
||||
// While a future is running, the process may add cancellations for faster
|
||||
// cancel operations, e.g. cancel connection attempt
|
||||
private volatile Cancelable cancel = null;
|
||||
|
||||
private final CountDownLatch listenersFinished = new CountDownLatch(1);
|
||||
|
||||
protected final Object lock;
|
||||
|
||||
// set the ready flag if operation completed
|
||||
protected boolean completed = false;
|
||||
|
||||
// by default false, change in case of success. An unfinished operation is
|
||||
// always set to failed
|
||||
protected FutureType type = FutureType.INIT;
|
||||
|
||||
protected String reason = "unknown";
|
||||
|
||||
private K self;
|
||||
|
||||
private String futureID;
|
||||
|
||||
/**
|
||||
* Default constructor that sets the lock object, which is used for synchronization to this instance.
|
||||
*/
|
||||
public BaseFuture(String futureID) {
|
||||
this.lock = this;
|
||||
this.futureID = futureID;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param self2
|
||||
* Set the type so that we are able to return it to the user. This is for making the API much more
|
||||
* usable.
|
||||
*/
|
||||
protected void self(final K self2) {
|
||||
this.self = self2;
|
||||
}
|
||||
|
||||
/**
|
||||
* @return The object that stored this object. This is necessary for the builder pattern when using generics.
|
||||
*/
|
||||
protected K self() {
|
||||
return self;
|
||||
}
|
||||
|
||||
public K await() throws InterruptedException {
|
||||
synchronized (lock) {
|
||||
while (!completed) {
|
||||
lock.wait();
|
||||
}
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
public K awaitUninterruptibly() {
|
||||
synchronized (lock) {
|
||||
while (!completed) {
|
||||
try {
|
||||
lock.wait();
|
||||
} catch (final InterruptedException e) {
|
||||
LOG.debug("interrupted, but ignoring", e);
|
||||
}
|
||||
}
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
public boolean await(final long timeoutMillis) throws InterruptedException {
|
||||
return await0(timeoutMillis, true);
|
||||
}
|
||||
|
||||
public boolean awaitUninterruptibly(final long timeoutMillis) {
|
||||
try {
|
||||
return await0(timeoutMillis, false);
|
||||
} catch (final InterruptedException e) {
|
||||
throw new RuntimeException("This should never ever happen.");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Internal await operation that also checks for potential deadlocks.
|
||||
*
|
||||
* @param timeoutMillis
|
||||
* The time to wait
|
||||
* @param interrupt
|
||||
* Flag to indicate if the method can throw an InterruptedException
|
||||
* @return True if this future has finished in timeoutMillis time, false otherwise
|
||||
* @throws InterruptedException
|
||||
* If the flag interrupt is true and this thread has been interrupted.
|
||||
*/
|
||||
private boolean await0(final long timeoutMillis, final boolean interrupt) throws InterruptedException {
|
||||
final long startTime = (timeoutMillis <= 0) ? 0 : System.currentTimeMillis();
|
||||
long waitTime = timeoutMillis;
|
||||
synchronized (lock) {
|
||||
if (completed) {
|
||||
return completed;
|
||||
} else if (waitTime <= 0) {
|
||||
return completed;
|
||||
}
|
||||
while (true) {
|
||||
try {
|
||||
lock.wait(waitTime);
|
||||
} catch (final InterruptedException e) {
|
||||
if (interrupt) {
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
if (completed) {
|
||||
return true;
|
||||
} else {
|
||||
waitTime = timeoutMillis - (System.currentTimeMillis() - startTime);
|
||||
if (waitTime <= 0) {
|
||||
return completed;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public boolean isCompleted() {
|
||||
synchronized (lock) {
|
||||
return completed;
|
||||
}
|
||||
}
|
||||
|
||||
public boolean isSuccess() {
|
||||
synchronized (lock) {
|
||||
return completed && (type == FutureType.OK);
|
||||
}
|
||||
}
|
||||
|
||||
public boolean isFailed() {
|
||||
synchronized (lock) {
|
||||
// failed means failed or canceled
|
||||
return completed && (type != FutureType.OK);
|
||||
}
|
||||
}
|
||||
|
||||
public boolean isCanceled() {
|
||||
synchronized (lock) {
|
||||
return completed && (type == FutureType.CANCEL);
|
||||
}
|
||||
}
|
||||
|
||||
public K failed(final BaseFuture origin) {
|
||||
return failed(origin.failedReason());
|
||||
}
|
||||
|
||||
public K failed(final String failed, final BaseFuture origin) {
|
||||
StringBuilder sb = new StringBuilder(failed);
|
||||
return failed(sb.append(" <-> ").append(origin.failedReason()).toString());
|
||||
}
|
||||
|
||||
public K failed(final Throwable t) {
|
||||
StringWriter stringWriter = new StringWriter();
|
||||
PrintWriter printWriter = new PrintWriter(stringWriter);
|
||||
t.printStackTrace(printWriter);
|
||||
return failed(stringWriter.toString());
|
||||
}
|
||||
|
||||
public K failed(final String failed, final Throwable t) {
|
||||
if (t == null) {
|
||||
return failed("n/a");
|
||||
}
|
||||
StringBuilder sb = new StringBuilder(failed);
|
||||
StringWriter stringWriter = new StringWriter();
|
||||
PrintWriter printWriter = new PrintWriter(stringWriter);
|
||||
t.printStackTrace(printWriter);
|
||||
return failed(sb.append(" <-> ").append(stringWriter.toString()).toString());
|
||||
}
|
||||
|
||||
public K failed(final String failed) {
|
||||
synchronized (lock) {
|
||||
if (!completedAndNotify()) {
|
||||
return self;
|
||||
}
|
||||
this.reason = failed;
|
||||
this.type = FutureType.FAILED;
|
||||
}
|
||||
notifyListeners();
|
||||
return self;
|
||||
}
|
||||
|
||||
public String failedReason() {
|
||||
final StringBuffer sb = new StringBuffer("Future (compl/canc):");
|
||||
synchronized (lock) {
|
||||
sb.append(completed).append("/")
|
||||
.append(", ").append(type.name())
|
||||
.append(", ").append(reason);
|
||||
return sb.toString();
|
||||
}
|
||||
}
|
||||
|
||||
public FutureType type() {
|
||||
synchronized (lock) {
|
||||
return type;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Make sure that the calling method has synchronized (lock).
|
||||
*
|
||||
* @return True if notified. It will notify if completed is not set yet.
|
||||
*/
|
||||
protected boolean completedAndNotify() {
|
||||
if (!completed) {
|
||||
completed = true;
|
||||
lock.notifyAll();
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
public K awaitListeners() throws InterruptedException {
|
||||
boolean wait = false;
|
||||
synchronized (lock) {
|
||||
while (!completed) {
|
||||
lock.wait();
|
||||
}
|
||||
if(listeners.size() > 0) {
|
||||
wait = true;
|
||||
}
|
||||
}
|
||||
if(wait) {
|
||||
listenersFinished.await();
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
public K awaitListenersUninterruptibly() {
|
||||
boolean wait = false;
|
||||
synchronized (lock) {
|
||||
while (!completed) {
|
||||
try {
|
||||
lock.wait();
|
||||
} catch (final InterruptedException e) {
|
||||
LOG.debug("interrupted, but ignoring", e);
|
||||
}
|
||||
}
|
||||
if(listeners.size() > 0) {
|
||||
wait = true;
|
||||
}
|
||||
}
|
||||
while(wait) {
|
||||
try {
|
||||
listenersFinished.await();
|
||||
wait = false;
|
||||
} catch (InterruptedException e) {
|
||||
LOG.debug("interrupted, but ignoring", e);
|
||||
}
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
public K addListener(final BaseFutureListener<? extends BaseFuture> listener) {
|
||||
boolean notifyNow = false;
|
||||
synchronized (lock) {
|
||||
if (completed) {
|
||||
notifyNow = true;
|
||||
} else {
|
||||
listeners.add(listener);
|
||||
}
|
||||
}
|
||||
// called only once
|
||||
if (notifyNow) {
|
||||
callOperationComplete(listener);
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
/**
|
||||
* Call operation complete or call fail listener. If the fail listener fails, its printed as a stack trace.
|
||||
*
|
||||
* @param listener
|
||||
* The listener to call
|
||||
*/
|
||||
@SuppressWarnings({ "rawtypes", "unchecked" })
|
||||
private void callOperationComplete(final BaseFutureListener listener) {
|
||||
try {
|
||||
listener.onComplete(this);
|
||||
} catch (final Exception e) {
|
||||
try {
|
||||
listener.onError(this, e);
|
||||
} catch (final Exception e1) {
|
||||
LOG.error("Unexpected exception in exceptionCaught()", e1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Always call this from outside synchronized(lock)!
|
||||
*/
|
||||
protected void notifyListeners() {
|
||||
// if this is synchronized, it will deadlock, so do not lock this!
|
||||
// There won't be any visibility problem or concurrent modification
|
||||
// because 'ready' flag will be checked against both addListener and
|
||||
// removeListener calls.
|
||||
//
|
||||
// This method doesn't need synchronization because:
|
||||
// 1) This method is always called after synchronized (this) block.
|
||||
// Hence any listener list modification happens-before this method.
|
||||
// 2) This method is called only when 'done' is true. Once 'done'
|
||||
// becomes true, the listener list is never modified - see add/removeListener()
|
||||
for (final BaseFutureListener<? extends BaseFuture> listener : listeners) {
|
||||
callOperationComplete(listener);
|
||||
}
|
||||
|
||||
listeners.clear();
|
||||
listenersFinished.countDown();
|
||||
// all events are one time events. It cannot happen that you get
|
||||
// notified twice
|
||||
}
|
||||
|
||||
public K removeListener(final BaseFutureListener<? extends BaseFuture> listener) {
|
||||
synchronized (lock) {
|
||||
if (!completed) {
|
||||
listeners.remove(listener);
|
||||
}
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
public K setCancel(final Cancelable cancel) {
|
||||
synchronized (lock) {
|
||||
if (!completed) {
|
||||
this.cancel = cancel;
|
||||
}
|
||||
}
|
||||
return self;
|
||||
}
|
||||
|
||||
public void cancel() {
|
||||
synchronized (lock) {
|
||||
if (!completedAndNotify()) {
|
||||
return;
|
||||
}
|
||||
this.type = FutureType.CANCEL;
|
||||
}
|
||||
if(cancel != null) {
|
||||
cancel.cancel();
|
||||
}
|
||||
notifyListeners();
|
||||
}
|
||||
|
||||
public String getFutureID() {
|
||||
return futureID;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,6 @@
|
||||
package io.github.chronosx88.JGUN.futures;
|
||||
|
||||
public interface BaseFutureListener<F extends BaseFuture> {
|
||||
void onComplete(F future);
|
||||
void onError(F future, Throwable exception);
|
||||
}
|
||||
@ -0,0 +1,29 @@
|
||||
/*
|
||||
* Copyright 2009 Thomas Bocek
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
|
||||
* use this file except in compliance with the License. You may obtain a copy of
|
||||
* the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
* License for the specific language governing permissions and limitations under
|
||||
* the License.
|
||||
*/
|
||||
package io.github.chronosx88.JGUN.futures;
|
||||
|
||||
/**
|
||||
* A cancelable class should implement this interface and use it for future
|
||||
* objects.
|
||||
*
|
||||
* @author Thomas Bocek
|
||||
*/
|
||||
public interface Cancelable {
|
||||
/**
|
||||
* Gets called if a future is cancelled.
|
||||
*/
|
||||
void cancel();
|
||||
}
|
||||
@ -0,0 +1,47 @@
|
||||
package io.github.chronosx88.JGUN.futures;
|
||||
|
||||
import org.json.JSONObject;
|
||||
|
||||
public class FutureGet extends BaseFuture<FutureGet> {
|
||||
private JSONObject data;
|
||||
private GetStatus getStatus;
|
||||
|
||||
enum GetStatus {
|
||||
OK, NOT_FOUND
|
||||
}
|
||||
|
||||
public FutureGet(String id) {
|
||||
super(id);
|
||||
self(this);
|
||||
}
|
||||
|
||||
public JSONObject getData() {
|
||||
return data;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isSuccess() {
|
||||
synchronized (lock) {
|
||||
return completed && (getStatus == GetStatus.OK) && (type == FutureType.OK);
|
||||
}
|
||||
}
|
||||
|
||||
public FutureGet done(JSONObject data) {
|
||||
synchronized (lock) {
|
||||
if(!data.isEmpty()) {
|
||||
this.getStatus = GetStatus.OK;
|
||||
this.type = FutureType.OK;
|
||||
} else {
|
||||
this.getStatus = GetStatus.NOT_FOUND;
|
||||
this.type = FutureType.FAILED;
|
||||
this.reason = "Not found";
|
||||
}
|
||||
this.data = data;
|
||||
if (!completedAndNotify()) {
|
||||
return this;
|
||||
}
|
||||
}
|
||||
notifyListeners();
|
||||
return this;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,24 @@
|
||||
package io.github.chronosx88.JGUN.futures;
|
||||
|
||||
public class FuturePut extends BaseFuture<FuturePut> {
|
||||
public FuturePut(String id) {
|
||||
super(id);
|
||||
self(this);
|
||||
}
|
||||
|
||||
public FuturePut done(boolean success) {
|
||||
synchronized (lock) {
|
||||
if(success) {
|
||||
this.type = FutureType.OK;
|
||||
} else {
|
||||
this.type = FutureType.FAILED;
|
||||
}
|
||||
|
||||
if (!completedAndNotify()) {
|
||||
return this;
|
||||
}
|
||||
}
|
||||
notifyListeners();
|
||||
return this;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,11 @@
|
||||
package io.github.chronosx88.JGUN.futures.builders;
|
||||
|
||||
import java.util.ArrayList;
|
||||
|
||||
public class GetBuilder {
|
||||
private final ArrayList<String> path;
|
||||
|
||||
public GetBuilder(ArrayList<String> path) {
|
||||
this.path = path;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,43 @@
|
||||
package io.github.chronosx88.JGUN.futures.builders;
|
||||
|
||||
import io.github.chronosx88.JGUN.Dispatcher;
|
||||
import io.github.chronosx88.JGUN.Dup;
|
||||
import io.github.chronosx88.JGUN.futures.FuturePut;
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.util.ArrayList;
|
||||
|
||||
public class PutBuilder {
|
||||
private JSONObject data;
|
||||
private ArrayList<String> path;
|
||||
private Dispatcher dispatcher;
|
||||
|
||||
public PutBuilder(Dispatcher dispatcher, JSONObject data, ArrayList<String> path) {
|
||||
this.dispatcher = dispatcher;
|
||||
this.data = data;
|
||||
this.path = path;
|
||||
}
|
||||
|
||||
public JSONObject getData() {
|
||||
return data;
|
||||
}
|
||||
|
||||
public ArrayList<String> getPath() {
|
||||
return path;
|
||||
}
|
||||
|
||||
public void setData(JSONObject data) {
|
||||
this.data = data;
|
||||
}
|
||||
|
||||
public void setPath(ArrayList<String> path) {
|
||||
this.path = path;
|
||||
}
|
||||
|
||||
public FuturePut build() {
|
||||
FuturePut futurePut = new FuturePut(Dup.random());
|
||||
dispatcher.addPendingFuture(futurePut);
|
||||
dispatcher.sendPutRequest(data);
|
||||
return futurePut;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,4 @@
|
||||
package io.github.chronosx88.JGUN.nodes;
|
||||
|
||||
public class GunNodeBuilder {
|
||||
}
|
||||
72
src/main/java/io/github/chronosx88/JGUN/nodes/GunPeer.java
Normal file
72
src/main/java/io/github/chronosx88/JGUN/nodes/GunPeer.java
Normal file
@ -0,0 +1,72 @@
|
||||
package io.github.chronosx88.JGUN.nodes;
|
||||
|
||||
import io.github.chronosx88.JGUN.*;
|
||||
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
|
||||
import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
|
||||
import org.java_websocket.client.WebSocketClient;
|
||||
import org.java_websocket.handshake.ServerHandshake;
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.net.InetAddress;
|
||||
import java.net.URI;
|
||||
import java.net.URISyntaxException;
|
||||
|
||||
public class GunPeer extends WebSocketClient implements Peer {
|
||||
private Dup dup = new Dup();
|
||||
private final StorageBackend storage;
|
||||
private final Dispatcher dispatcher;
|
||||
|
||||
public GunPeer(InetAddress address, int port, StorageBackend storage) throws URISyntaxException {
|
||||
super(new URI("ws://" + address.getHostAddress() + ":" + port));
|
||||
this.storage = storage;
|
||||
this.dispatcher = new Dispatcher(storage, this);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onOpen(ServerHandshake handshakeData) {
|
||||
System.out.println("# Connection with SuperNode open. Status: " + handshakeData.getHttpStatus());
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onMessage(String message) {
|
||||
JSONObject msg = new JSONObject(message);
|
||||
if(dup.check(msg.getString("#"))){ return; }
|
||||
dup.track(msg.getString("#"));
|
||||
if(msg.opt("put") != null) {
|
||||
HAM.mix(new InMemoryGraph(msg.getJSONObject("put")), storage);
|
||||
}
|
||||
if(msg.opt("get") != null) {
|
||||
InMemoryGraph getResults = Utils.getRequest(msg.getJSONObject("get"), storage);
|
||||
JSONObject ack = new JSONObject()
|
||||
.put("#", dup.track(Dup.random()))
|
||||
.put("@", msg.getString("#"))
|
||||
.put("put", getResults.toJSONObject());
|
||||
emit(ack.toString());
|
||||
}
|
||||
System.out.println("---------------");
|
||||
System.out.println(msg.toString(2));
|
||||
emit(message);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onClose(int code, String reason, boolean remote) {
|
||||
System.out.println("Connection closed. Code/reason/remote: " + code + "/" + reason + "/" + remote);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onError(Exception ex) {
|
||||
System.out.println("Terrible fail: ");
|
||||
ex.printStackTrace();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void emit(String data) {
|
||||
this.send(data);
|
||||
}
|
||||
|
||||
public PathRef get(String key) {
|
||||
PathRef pathRef = new PathRef(dispatcher);
|
||||
pathRef.get(key);
|
||||
return pathRef;
|
||||
}
|
||||
}
|
||||
@ -1,20 +1,21 @@
|
||||
package io.github.chronosx88.GunJava;
|
||||
package io.github.chronosx88.JGUN.nodes;
|
||||
|
||||
import io.github.chronosx88.GunJava.storageBackends.MemoryBackend;
|
||||
import io.github.chronosx88.JGUN.Dup;
|
||||
import io.github.chronosx88.JGUN.HAM;
|
||||
import io.github.chronosx88.JGUN.Utils;
|
||||
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
|
||||
import org.java_websocket.WebSocket;
|
||||
import org.java_websocket.handshake.ClientHandshake;
|
||||
import org.java_websocket.server.WebSocketServer;
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.net.InetSocketAddress;
|
||||
import java.util.Timer;
|
||||
|
||||
public class Server extends WebSocketServer {
|
||||
private Timer timer = new Timer(true);
|
||||
public class GunSuperPeer extends WebSocketServer implements Peer {
|
||||
private Dup dup = new Dup();
|
||||
private MemoryBackend graph = new MemoryBackend();
|
||||
private InMemoryGraph graph = new InMemoryGraph();
|
||||
|
||||
public Server(int port) {
|
||||
public GunSuperPeer(int port) {
|
||||
super(new InetSocketAddress(port));
|
||||
setReuseAddr(true);
|
||||
}
|
||||
@ -35,17 +36,23 @@ public class Server extends WebSocketServer {
|
||||
if(dup.check(msg.getString("#"))) { return; }
|
||||
dup.track(msg.getString("#"));
|
||||
if(msg.opt("put") != null) {
|
||||
HAM.mix(new MemoryBackend(msg.getJSONObject("put")), graph);
|
||||
HAM.mix(new InMemoryGraph(msg.getJSONObject("put")), graph);
|
||||
}
|
||||
if(msg.opt("get") != null) {
|
||||
MemoryBackend result = Utils.getRequest(msg.optJSONObject("get"), graph);
|
||||
InMemoryGraph result = Utils.getRequest(msg.optJSONObject("get"), graph);
|
||||
JSONObject ack = new JSONObject();
|
||||
if(!result.isEmpty()) {
|
||||
JSONObject ack = new JSONObject();
|
||||
emit(ack
|
||||
.put("#", dup.track(Dup.random()))
|
||||
.put("@", msg.getString("#"))
|
||||
.put("put", result.toJSONObject())
|
||||
.toString());
|
||||
} else {
|
||||
emit(ack
|
||||
.put("#", dup.track(Dup.random()))
|
||||
.put("@", msg.getString("#"))
|
||||
.put("ok", false)
|
||||
.toString());
|
||||
}
|
||||
}
|
||||
emit(message);
|
||||
@ -53,12 +60,13 @@ public class Server extends WebSocketServer {
|
||||
|
||||
@Override
|
||||
public void onError(WebSocket conn, Exception ex) {
|
||||
//
|
||||
System.out.println("# Exception occured on connection: " + conn.getRemoteSocketAddress());
|
||||
ex.printStackTrace();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onStart() {
|
||||
System.out.println("Server started on port: " + getPort());
|
||||
System.out.println("GunSuperPeer started on port: " + getPort());
|
||||
}
|
||||
|
||||
public void emit(String data) {
|
||||
5
src/main/java/io/github/chronosx88/JGUN/nodes/Peer.java
Normal file
5
src/main/java/io/github/chronosx88/JGUN/nodes/Peer.java
Normal file
@ -0,0 +1,5 @@
|
||||
package io.github.chronosx88.JGUN.nodes;
|
||||
|
||||
public interface Peer {
|
||||
void emit(String data);
|
||||
}
|
||||
@ -0,0 +1,69 @@
|
||||
package io.github.chronosx88.JGUN.storageBackends;
|
||||
|
||||
import io.github.chronosx88.JGUN.Node;
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.util.*;
|
||||
|
||||
public class InMemoryGraph implements StorageBackend {
|
||||
|
||||
private final HashMap<String, Node> nodes;
|
||||
|
||||
public InMemoryGraph(JSONObject source) {
|
||||
nodes = new LinkedHashMap<>();
|
||||
|
||||
for (String soul : source.keySet())
|
||||
nodes.put(soul, new Node(source.getJSONObject(soul)));
|
||||
}
|
||||
|
||||
public InMemoryGraph() {
|
||||
nodes = new LinkedHashMap<>();
|
||||
}
|
||||
|
||||
public Node getNode(String soul) {
|
||||
return nodes.getOrDefault(soul, null);
|
||||
}
|
||||
|
||||
public void addNode(String soul, Node incomingNode) {
|
||||
nodes.put(soul, incomingNode);
|
||||
}
|
||||
|
||||
public boolean hasNode(String soul) {
|
||||
return nodes.containsKey(soul);
|
||||
}
|
||||
|
||||
public Set<Map.Entry<String, Node>> entries() {
|
||||
return nodes.entrySet();
|
||||
}
|
||||
|
||||
public Collection<Node> nodes() { return nodes.values(); }
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
JSONObject jsonObject = new JSONObject();
|
||||
for(Map.Entry<String, Node> entry : nodes.entrySet()) {
|
||||
jsonObject.put(entry.getKey(), entry.getValue().toJSONObject());
|
||||
}
|
||||
return jsonObject.toString();
|
||||
}
|
||||
|
||||
public String toPrettyString() {
|
||||
JSONObject jsonObject = new JSONObject();
|
||||
for(Map.Entry<String, Node> entry : nodes.entrySet()) {
|
||||
jsonObject.put(entry.getKey(), entry.getValue().toJSONObject());
|
||||
}
|
||||
return jsonObject.toString(2);
|
||||
}
|
||||
|
||||
public JSONObject toJSONObject() {
|
||||
JSONObject jsonObject = new JSONObject();
|
||||
for(Map.Entry<String, Node> entry : nodes.entrySet()) {
|
||||
jsonObject.put(entry.getKey(), entry.getValue().toJSONObject());
|
||||
}
|
||||
return jsonObject;
|
||||
}
|
||||
|
||||
public boolean isEmpty() {
|
||||
return nodes.isEmpty();
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,20 @@
|
||||
package io.github.chronosx88.JGUN.storageBackends;
|
||||
|
||||
import io.github.chronosx88.JGUN.Node;
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.util.Collection;
|
||||
import java.util.Map;
|
||||
import java.util.Set;
|
||||
|
||||
public interface StorageBackend {
|
||||
Node getNode(String soul);
|
||||
void addNode(String soul, Node node);
|
||||
boolean hasNode(String soul);
|
||||
Set<Map.Entry<String, Node>> entries();
|
||||
Collection<Node> nodes();
|
||||
String toString();
|
||||
String toPrettyString();
|
||||
JSONObject toJSONObject();
|
||||
boolean isEmpty();
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user