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Now all futures in JGUN are children of CompletableFuture, correctly putting, getting, deleting.

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This commit is contained in:
ChronosX88 2019-05-09 14:06:21 +04:00
parent 92b734c511
commit b899018045
16 changed files with 210 additions and 590 deletions
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29
src/main/java/io/github/chronosx88/JGUN/Dispatcher.java
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@ -1,21 +1,22 @@
package io.github.chronosx88.JGUN;
import io.github.chronosx88.JGUN.futures.BaseFuture;
import io.github.chronosx88.JGUN.futures.BaseCompletableFuture;
import io.github.chronosx88.JGUN.futures.FutureGet;
import io.github.chronosx88.JGUN.futures.FuturePut;
import io.github.chronosx88.JGUN.nodes.Peer;
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
import org.java_websocket.client.WebSocketClient;
import org.json.JSONObject;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class Dispatcher {
private final Map<String, BaseFuture<? extends BaseFuture>> pendingFutures = new ConcurrentHashMap<>();
private final Map<String, BaseCompletableFuture<?>> pendingFutures = new ConcurrentHashMap<>();
private final Peer peer;
private final StorageBackend graphStorage;
private final Dup dup;
private final Peer peer;
public Dispatcher(StorageBackend graphStorage, Peer peer, Dup dup) {
this.graphStorage = graphStorage;
@ -23,7 +24,7 @@ public class Dispatcher {
this.dup = dup;
}
public void addPendingFuture(BaseFuture<? extends BaseFuture> future) {
public void addPendingFuture(BaseCompletableFuture<?> future) {
pendingFutures.put(future.getFutureID(), future);
}
@ -32,7 +33,7 @@ public class Dispatcher {
JSONObject ack = handlePut(message);
peer.emit(ack.toString());
}
if(message.has("get")) {
if(message.has("await")) {
JSONObject ack = handleGet(message);
peer.emit(ack.toString());
}
@ -42,7 +43,7 @@ public class Dispatcher {
}
private JSONObject handleGet(JSONObject getData) {
InMemoryGraph getResults = Utils.getRequest(getData.getJSONObject("get"), graphStorage);
InMemoryGraph getResults = Utils.getRequest(getData.getJSONObject("await"), graphStorage);
return new JSONObject() // Acknowledgment
.put( "#", dup.track(Dup.random()) )
.put( "@", getData.getString("#") )
@ -61,32 +62,32 @@ public class Dispatcher {
private void handleIncomingAck(JSONObject ack) {
if(ack.has("put")) {
if(pendingFutures.containsKey(ack.getString("@"))) {
BaseFuture<? extends BaseFuture> future = pendingFutures.get(ack.getString("@"));
BaseCompletableFuture<?> future = pendingFutures.get(ack.getString("@"));
if(future instanceof FutureGet) {
((FutureGet) future).done(ack.getJSONObject("put"));
((FutureGet) future).complete(ack.getJSONObject("put"));
}
}
}
if(ack.has("ok")) {
if(pendingFutures.containsKey(ack.getString("@"))) {
BaseFuture<? extends BaseFuture> future = pendingFutures.get(ack.getString("@"));
BaseCompletableFuture<?> future = pendingFutures.get(ack.getString("@"));
if(future instanceof FuturePut) {
((FuturePut) future).done(ack.getBoolean("ok"));
((FuturePut) future).complete(ack.getBoolean("ok"));
}
}
}
}
public void sendPutRequest(JSONObject data) {
public void sendPutRequest(String messageID, JSONObject data) {
new Thread(() -> {
InMemoryGraph graph = Utils.prepareDataForPut(data);
peer.emit(Utils.formatPutRequest(graph.toJSONObject()).toString());
peer.emit(Utils.formatPutRequest(messageID, graph.toJSONObject()).toString());
}).start();
}
public void sendGetRequest(String key, String field) {
public void sendGetRequest(String messageID, String key, String field) {
new Thread(() -> {
JSONObject jsonGet = Utils.formatGetRequest(key, field);
JSONObject jsonGet = Utils.formatGetRequest(messageID, key, field);
peer.emit(jsonGet.toString());
}).start();
}

28
src/main/java/io/github/chronosx88/JGUN/Gun.java Normal file
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@ -0,0 +1,28 @@
package io.github.chronosx88.JGUN;
import io.github.chronosx88.JGUN.nodes.GunClient;
import io.github.chronosx88.JGUN.storageBackends.StorageBackend;
import java.net.InetAddress;
import java.net.URISyntaxException;
public class Gun {
private Dispatcher dispatcher;
private GunClient gunClient;
public Gun(InetAddress address, int port, StorageBackend storage) {
try {
this.gunClient = new GunClient(address, port, storage);
this.dispatcher = gunClient.getDispatcher();
this.gunClient.connectBlocking();
} catch (URISyntaxException | InterruptedException e) {
e.printStackTrace();
}
}
public PathRef get(String key) {
PathRef pathRef = new PathRef(dispatcher);
pathRef.get(key);
return pathRef;
}
}

67
src/main/java/io/github/chronosx88/JGUN/PathRef.java
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@ -24,43 +24,52 @@ public class PathRef {
public FutureGet getData() {
FutureGet futureGet = new FutureGet(Dup.random());
Iterator<String> iterator = path.iterator();
new Thread(() -> {
Iterator<String> iterator = path.iterator();
String rootSoul = iterator.next();
String field = iterator.hasNext() ? iterator.next() : null;
iterator = path.iterator();
iterator.next();
CompletableFuture<JSONObject> future = CompletableFuture.supplyAsync(() -> {
String rootSoul = iterator.next();
String field = iterator.hasNext() ? iterator.next() : null;
FutureGet futureGetRootSoul = new FutureGet(Dup.random());
dispatcher.addPendingFuture(futureGetRootSoul);
dispatcher.sendGetRequest(rootSoul, field);
futureGetRootSoul.awaitUninterruptibly();
if(futureGetRootSoul.isSuccess() && futureGetRootSoul.getData() != null) {
return futureGetRootSoul.getData();
} else {
return null;
dispatcher.sendGetRequest(futureGetRootSoul.getFutureID(), rootSoul, field);
JSONObject result = futureGetRootSoul.await();
if(result != null && result.isEmpty()) {
result = null;
}
return result == null ? null : result.getJSONObject(rootSoul);
});
while(iterator.hasNext()) {
do {
String soul = iterator.hasNext() ? iterator.next() : null;
String nextField = iterator.hasNext() ? iterator.next() : null;
future = future.thenApply(jsonObject -> {
String soul = iterator.next();
String field = iterator.hasNext() ? iterator.next() : null;
if(jsonObject != null) {
String nodeRef = jsonObject.getJSONObject(soul).getString("#");
FutureGet get = new FutureGet(Dup.random());
dispatcher.addPendingFuture(get);
dispatcher.sendGetRequest(nodeRef, field);
get.awaitUninterruptibly();
if(get.isSuccess() && get.getData() != null) {
return get.getData();
if(soul != null) {
if(jsonObject.get(soul) instanceof JSONObject) {
String nodeRef = jsonObject.getJSONObject(soul).getString("#");
FutureGet get = new FutureGet(Dup.random());
dispatcher.addPendingFuture(get);
dispatcher.sendGetRequest(get.getFutureID(), nodeRef, nextField);
JSONObject result = get.await();
if(result != null && result.isEmpty()) {
result = null;
}
return result == null ? null : result.getJSONObject(nodeRef);
}
} else {
return null;
return jsonObject;
}
}
return null;
});
}
} while(iterator.hasNext());
try {
JSONObject data = future.get();
futureGet.done(data);
futureGet.complete(data);
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
@ -71,7 +80,19 @@ public class PathRef {
public FuturePut put(JSONObject data) {
FuturePut futurePut = new FuturePut(Dup.random());
dispatcher.addPendingFuture(futurePut);
dispatcher.sendPutRequest(data);
JSONObject temp = new JSONObject();
JSONObject temp1 = temp;
for (int i = 0; i < path.size(); i++) {
if(i != path.size() - 1) {
JSONObject object = new JSONObject();
temp1.put(path.get(i), object);
temp1 = object;
} else {
temp1.put(path.get(i), data == null ? JSONObject.NULL : data);
}
}
dispatcher.sendPutRequest(futurePut.getFutureID(), temp);
return futurePut;
}
}

22
src/main/java/io/github/chronosx88/JGUN/Utils.java
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@ -59,11 +59,13 @@ public class Utils {
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);
ArrayList<String> path = new ArrayList<>();
path.add(objectKey);
prepareNodeForPut(node, result, path);
Object object = data.get(objectKey);
if(object instanceof JSONObject) {
Node node = Utils.newNode(objectKey, (JSONObject) object);
ArrayList<String> path = new ArrayList<>();
path.add(objectKey);
prepareNodeForPut(node, result, path);
}
}
return result;
}
@ -86,21 +88,21 @@ public class Utils {
result.addNode(node.soul, node);
}
public static JSONObject formatGetRequest(String key, String field) {
public static JSONObject formatGetRequest(String messageID, String key, String field) {
JSONObject jsonObject = new JSONObject();
jsonObject.put("#", Dup.random());
jsonObject.put("#", messageID);
JSONObject getParameters = new JSONObject();
getParameters.put("#", key);
if(field != null) {
getParameters.put(".", field);
}
jsonObject.put("get", getParameters);
jsonObject.put("await", getParameters);
return jsonObject;
}
public static JSONObject formatPutRequest(JSONObject data) {
public static JSONObject formatPutRequest(String messageID, JSONObject data) {
JSONObject jsonObject = new JSONObject();
jsonObject.put("#", Dup.random());
jsonObject.put("#", messageID);
jsonObject.put("put", data);
return jsonObject;
}

18
src/main/java/io/github/chronosx88/JGUN/entrypoints/MainClientServer.java
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@ -1,18 +0,0 @@
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();
}
}

6
src/main/java/io/github/chronosx88/JGUN/entrypoints/MainClient.java → src/main/java/io/github/chronosx88/JGUN/examples/MainClient.java
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@ -1,6 +1,6 @@
package io.github.chronosx88.JGUN.entrypoints;
package io.github.chronosx88.JGUN.examples;
import io.github.chronosx88.JGUN.nodes.GunPeer;
import io.github.chronosx88.JGUN.nodes.GunClient;
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
import java.net.Inet4Address;
@ -9,7 +9,7 @@ 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 gunClient = new GunClient(Inet4Address.getByAddress(new byte[]{127, 0, 0, 1}), 5054, new InMemoryGraph());
gunClient.connect();
}
}

46
src/main/java/io/github/chronosx88/JGUN/examples/MainClientServer.java Normal file
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@ -0,0 +1,46 @@
package io.github.chronosx88.JGUN.examples;
import io.github.chronosx88.JGUN.Gun;
import io.github.chronosx88.JGUN.futures.FutureGet;
import io.github.chronosx88.JGUN.futures.FuturePut;
import io.github.chronosx88.JGUN.nodes.GunSuperPeer;
import io.github.chronosx88.JGUN.storageBackends.InMemoryGraph;
import org.json.JSONObject;
import java.net.Inet4Address;
import java.net.UnknownHostException;
public class MainClientServer {
public static void main(String[] args) {
GunSuperPeer gunSuperNode = new GunSuperPeer(21334);
gunSuperNode.start();
new Thread(() -> {
Gun gun = null;
try {
gun = new Gun(Inet4Address.getByAddress(new byte[]{127, 0, 0, 1}), 21334, new InMemoryGraph());
} catch (UnknownHostException e) {
e.printStackTrace();
}
FuturePut futurePut = gun.get("random").get("dVFtzE9CL").put(new JSONObject().put("hello", "world"));
boolean success = futurePut.await();
System.out.println("[FuturePut] Success: " + success);
FutureGet futureGet = gun.get("random").get("dVFtzE9CL").getData();
JSONObject result = futureGet.await();
System.out.println("[FutureGet] Result of get: " + result.toString(2));
FuturePut futurePut1 = gun.get("random").get("dVFtzE9CL").put(new JSONObject().put("hello", "123"));
System.out.println("[FuturePut1] Putting an item again: " + futurePut1.await());
FutureGet futureGet1 = gun.get("random").get("dVFtzE9CL").getData();
JSONObject result1 = futureGet1.await();
System.out.println("[FutureGet] Result of get: " + result1.toString(2));
System.out.println("Deleting an item random/dVFtzE9CL");
gun.get("random").get("dVFtzE9CL").put(null).await();
JSONObject resultNull = gun.get("random").get("dVFtzE9CL").getData().await();
if(resultNull == null) {
System.out.println("Now random/dVFtzE9CL is null!");
}
gun.get("random").put(new JSONObject().put("hello", "world")).await();
System.out.println(gun.get("random").getData().await().toString(2));
}).start();
}
}

2
src/main/java/io/github/chronosx88/JGUN/entrypoints/MainServer.java → src/main/java/io/github/chronosx88/JGUN/examples/MainServer.java
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@ -1,4 +1,4 @@
package io.github.chronosx88.JGUN.entrypoints;
package io.github.chronosx88.JGUN.examples;
import io.github.chronosx88.JGUN.nodes.GunSuperPeer;

37
src/main/java/io/github/chronosx88/JGUN/futures/BaseCompletableFuture.java Normal file
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@ -0,0 +1,37 @@
package io.github.chronosx88.JGUN.futures;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
public class BaseCompletableFuture<T> extends CompletableFuture<T> {
private final String futureID;
public BaseCompletableFuture(String id) {
super();
futureID = id;
}
public String getFutureID() {
return futureID;
}
public void addListener(final BaseFutureListener<T> listener) {
this.whenCompleteAsync((t, throwable) -> {
if(throwable == null) {
listener.onComplete(t);
} else {
listener.onError(t, throwable);
}
});
}
public T await() {
T t = null;
try {
t = super.get();
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
return t;
}
}

394
src/main/java/io/github/chronosx88/JGUN/futures/BaseFuture.java
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@ -1,394 +0,0 @@
/*
* 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;
}
}

6
src/main/java/io/github/chronosx88/JGUN/futures/BaseFutureListener.java
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@ -1,6 +1,6 @@
package io.github.chronosx88.JGUN.futures;
public interface BaseFutureListener<F extends BaseFuture> {
void onComplete(F future);
void onError(F future, Throwable exception);
public interface BaseFutureListener<T> {
void onComplete(T result);
void onError(T result, Throwable exception);
}

29
src/main/java/io/github/chronosx88/JGUN/futures/Cancelable.java
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@ -1,29 +0,0 @@
/*
* 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();
}

43
src/main/java/io/github/chronosx88/JGUN/futures/FutureGet.java
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@ -2,49 +2,8 @@ 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 class FutureGet extends BaseCompletableFuture<JSONObject> {
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 != null) {
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;
}
}

22
src/main/java/io/github/chronosx88/JGUN/futures/FuturePut.java
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@ -1,24 +1,10 @@
package io.github.chronosx88.JGUN.futures;
public class FuturePut extends BaseFuture<FuturePut> {
/**
* Return success of PUT operation
*/
public class FuturePut extends BaseCompletableFuture<Boolean> {
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;
}
}

14
src/main/java/io/github/chronosx88/JGUN/nodes/GunPeer.java → src/main/java/io/github/chronosx88/JGUN/nodes/GunClient.java
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@ -12,12 +12,12 @@ import java.net.InetAddress;
import java.net.URI;
import java.net.URISyntaxException;
public class GunPeer extends WebSocketClient implements Peer {
public class GunClient 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 {
public GunClient(InetAddress address, int port, StorageBackend storage) throws URISyntaxException {
super(new URI("ws://" + address.getHostAddress() + ":" + port));
this.storage = storage;
this.dispatcher = new Dispatcher(storage, this, dup);
@ -47,14 +47,12 @@ public class GunPeer extends WebSocketClient implements Peer {
ex.printStackTrace();
}
public Dispatcher getDispatcher() {
return dispatcher;
}
@Override
public void emit(String data) {
this.send(data);
}
public PathRef get(String key) {
PathRef pathRef = new PathRef(dispatcher);
pathRef.get(key);
return pathRef;
}
}

37
src/main/java/io/github/chronosx88/JGUN/nodes/GunSuperPeer.java
View File

@ -1,8 +1,7 @@
package io.github.chronosx88.JGUN.nodes;
import io.github.chronosx88.JGUN.Dispatcher;
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;
@ -14,10 +13,12 @@ import java.net.InetSocketAddress;
public class GunSuperPeer extends WebSocketServer implements Peer {
private Dup dup = new Dup();
private InMemoryGraph graph = new InMemoryGraph();
private Dispatcher dispatcher;
public GunSuperPeer(int port) {
super(new InetSocketAddress(port));
setReuseAddr(true);
dispatcher = new Dispatcher(graph, this, dup);
}
@Override
@ -32,35 +33,17 @@ public class GunSuperPeer extends WebSocketServer implements Peer {
@Override
public void onMessage(WebSocket conn, 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")), graph);
}
if(msg.opt("get") != null) {
InMemoryGraph result = Utils.getRequest(msg.optJSONObject("get"), graph);
JSONObject ack = new JSONObject();
if(!result.isEmpty()) {
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);
JSONObject jsonMsg = new JSONObject(message);
if(dup.check(jsonMsg.getString("#"))){ return; }
dup.track(jsonMsg.getString("#"));
dispatcher.handleIncomingMessage(jsonMsg);
}
@Override
public void onError(WebSocket conn, Exception ex) {
System.out.println("# Exception occured on connection: " + conn.getRemoteSocketAddress());
if(conn != null) {
System.out.println("# Exception occured on connection: " + conn.getRemoteSocketAddress());
}
ex.printStackTrace();
}