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Added some synchronization to the KadBucket and DHT

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This commit is contained in:
Joshua Kissoon 2014-05-09 11:54:21 +05:30
parent 3ab6b3d2ab
commit 565bf50ddb
4 changed files with 38 additions and 38 deletions
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10
src/kademlia/KademliaNode.java
View File

@ -318,7 +318,7 @@ public class KademliaNode
* @throws java.io.IOException
* @throws kademlia.exceptions.ContentNotFoundException
*/
public StorageEntry get(GetParameter param) throws NoSuchElementException, IOException, ContentNotFoundException
public synchronized StorageEntry get(GetParameter param) throws NoSuchElementException, IOException, ContentNotFoundException
{
if (this.dht.contains(param))
{
@ -340,7 +340,7 @@ public class KademliaNode
*
* @throws java.io.IOException
*/
public void refresh() throws IOException
public synchronized void refresh() throws IOException
{
new KadRefreshOperation(this.server, this, this.dht, this.config).execute();
}
@ -368,7 +368,7 @@ public class KademliaNode
*
* @throws java.io.FileNotFoundException
*/
public void shutdown(final boolean saveState) throws IOException
public synchronized void shutdown(final boolean saveState) throws IOException
{
/* Shut down the server */
this.server.shutdown();
@ -388,7 +388,7 @@ public class KademliaNode
*
* @throws java.io.FileNotFoundException
*/
private void saveKadState() throws IOException
private synchronized void saveKadState() throws IOException
{
DataOutputStream dout;
@ -459,7 +459,7 @@ public class KademliaNode
* @return The string representation of this Kad instance
*/
@Override
public String toString()
public synchronized String toString()
{
StringBuilder sb = new StringBuilder("\n\nPrinting Kad State for instance with owner: ");
sb.append(this.ownerId);

2
src/kademlia/core/DefaultConfiguration.java
View File

@ -10,7 +10,7 @@ import java.io.File;
public class DefaultConfiguration implements KadConfiguration
{
private final static long RESTORE_INTERVAL = 30 * 1000; // in milliseconds
private final static long RESTORE_INTERVAL = 60 * 1000; // in milliseconds
private final static long RESPONSE_TIMEOUT = 1500;
private final static long OPERATION_TIMEOUT = 3000;
private final static int CONCURRENCY = 10;

38
src/kademlia/dht/DHT.java
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@ -25,7 +25,7 @@ import kademlia.util.serializer.KadSerializer;
public class DHT
{
private transient StoredContentManager entriesManager;
private transient StoredContentManager contentManager;
private transient KadSerializer<StorageEntry> serializer = null;
private transient KadConfiguration config;
@ -43,7 +43,7 @@ public class DHT
*/
public final void initialize()
{
entriesManager = new StoredContentManager();
contentManager = new StoredContentManager();
}
/**
@ -83,9 +83,9 @@ public class DHT
public synchronized boolean store(StorageEntry content) throws IOException
{
/* Lets check if we have this content and it's the updated version */
if (this.entriesManager.contains(content.getContentMetadata()))
if (this.contentManager.contains(content.getContentMetadata()))
{
StorageEntryMetadata current = this.entriesManager.get(content.getContentMetadata());
StorageEntryMetadata current = this.contentManager.get(content.getContentMetadata());
/* update the last republished time */
current.updateLastRepublished();
@ -118,7 +118,7 @@ public class DHT
{
//System.out.println("Adding new content.");
/* Keep track of this content in the entries manager */
StorageEntryMetadata sEntry = this.entriesManager.put(content.getContentMetadata());
StorageEntryMetadata sEntry = this.contentManager.put(content.getContentMetadata());
/* Now we store the content locally in a file */
String contentStorageFolder = this.getContentStorageFolderName(content.getContentMetadata().getKey());
@ -155,7 +155,7 @@ public class DHT
*
* @return A KadContent object
*/
private StorageEntry retrieve(KademliaId key, int hashCode) throws FileNotFoundException, IOException, ClassNotFoundException
private synchronized StorageEntry retrieve(KademliaId key, int hashCode) throws FileNotFoundException, IOException, ClassNotFoundException
{
String folder = this.getContentStorageFolderName(key);
DataInputStream din = new DataInputStream(new FileInputStream(folder + File.separator + hashCode + ".kct"));
@ -169,9 +169,9 @@ public class DHT
*
* @return boolean Whether any content exist that satisfy the criteria
*/
public boolean contains(GetParameter param)
public synchronized boolean contains(GetParameter param)
{
return this.entriesManager.contains(param);
return this.contentManager.contains(param);
}
/**
@ -183,7 +183,7 @@ public class DHT
*
* @throws java.io.IOException
*/
public StorageEntry get(StorageEntryMetadata entry) throws IOException, NoSuchElementException
public synchronized StorageEntry get(StorageEntryMetadata entry) throws IOException, NoSuchElementException
{
try
{
@ -212,12 +212,12 @@ public class DHT
*
* @throws java.io.IOException
*/
public StorageEntry get(GetParameter param) throws NoSuchElementException, IOException
public synchronized StorageEntry get(GetParameter param) throws NoSuchElementException, IOException
{
/* Load a KadContent if any exist for the given criteria */
try
{
StorageEntryMetadata e = this.entriesManager.get(param);
StorageEntryMetadata e = this.contentManager.get(param);
return this.retrieve(e.getKey(), e.hashCode());
}
catch (FileNotFoundException e)
@ -241,17 +241,17 @@ public class DHT
*
* @throws kademlia.exceptions.ContentNotFoundException
*/
public void remove(KadContent content) throws ContentNotFoundException
public synchronized void remove(KadContent content) throws ContentNotFoundException
{
this.remove(new StorageEntryMetadata(content));
}
public void remove(StorageEntryMetadata entry) throws ContentNotFoundException
public synchronized void remove(StorageEntryMetadata entry) throws ContentNotFoundException
{
String folder = this.getContentStorageFolderName(entry.getKey());
File file = new File(folder + File.separator + entry.hashCode() + ".kct");
entriesManager.remove(entry);
contentManager.remove(entry);
if (file.exists())
{
@ -270,7 +270,7 @@ public class DHT
*
* @return String The name of the folder
*/
private String getContentStorageFolderName(KademliaId key)
private synchronized String getContentStorageFolderName(KademliaId key)
{
/**
* Each content is stored in a folder named after the first 10 characters of the NodeId
@ -294,7 +294,7 @@ public class DHT
*/
public synchronized List<StorageEntryMetadata> getStorageEntries()
{
return entriesManager.getAllEntries();
return contentManager.getAllEntries();
}
/**
@ -303,13 +303,13 @@ public class DHT
*
* @param ientries The entries to add
*/
public void putStorageEntries(List<StorageEntryMetadata> ientries)
public synchronized void putStorageEntries(List<StorageEntryMetadata> ientries)
{
for (StorageEntryMetadata e : ientries)
{
try
{
this.entriesManager.put(e);
this.contentManager.put(e);
}
catch (ContentExistException ex)
{
@ -321,6 +321,6 @@ public class DHT
@Override
public synchronized String toString()
{
return this.entriesManager.toString();
return this.contentManager.toString();
}
}

26
src/kademlia/routing/KadBucketImpl.java
View File

@ -44,7 +44,7 @@ public class KadBucketImpl implements KadBucket
}
@Override
public void insert(Contact c)
public synchronized void insert(Contact c)
{
if (this.contacts.contains(c))
{
@ -99,25 +99,25 @@ public class KadBucketImpl implements KadBucket
}
@Override
public void insert(Node n)
public synchronized void insert(Node n)
{
this.insert(new Contact(n));
}
@Override
public boolean containsContact(Contact c)
public synchronized boolean containsContact(Contact c)
{
return this.contacts.contains(c);
}
@Override
public boolean containsNode(Node n)
public synchronized boolean containsNode(Node n)
{
return this.containsContact(new Contact(n));
}
@Override
public boolean removeContact(Contact c)
public synchronized boolean removeContact(Contact c)
{
/* If the contact does not exist, then we failed to remove it */
if (!this.contacts.contains(c))
@ -142,7 +142,7 @@ public class KadBucketImpl implements KadBucket
return true;
}
public Contact getFromContacts(Node n)
public synchronized Contact getFromContacts(Node n)
{
for (Contact c : this.contacts)
{
@ -156,7 +156,7 @@ public class KadBucketImpl implements KadBucket
throw new NoSuchElementException("The contact does not exist in the contacts list.");
}
public Contact removeFromContacts(Node n)
public synchronized Contact removeFromContacts(Node n)
{
for (Contact c : this.contacts)
{
@ -172,19 +172,19 @@ public class KadBucketImpl implements KadBucket
}
@Override
public boolean removeNode(Node n)
public synchronized boolean removeNode(Node n)
{
return this.removeContact(new Contact(n));
}
@Override
public int numContacts()
public synchronized int numContacts()
{
return this.contacts.size();
}
@Override
public int getDepth()
public synchronized int getDepth()
{
return this.depth;
}
@ -198,7 +198,7 @@ public class KadBucketImpl implements KadBucket
/**
* When the bucket is filled, we keep extra contacts in the replacement cache.
*/
private void insertIntoReplacementCache(Contact c)
private synchronized void insertIntoReplacementCache(Contact c)
{
/* Just return if this contact is already in our replacement cache */
if (this.replacementCache.contains(c))
@ -223,7 +223,7 @@ public class KadBucketImpl implements KadBucket
}
}
public Contact removeFromReplacementCache(Node n)
public synchronized Contact removeFromReplacementCache(Node n)
{
for (Contact c : this.replacementCache)
{
@ -239,7 +239,7 @@ public class KadBucketImpl implements KadBucket
}
@Override
public String toString()
public synchronized String toString()
{
StringBuilder sb = new StringBuilder("Bucket at depth: ");
sb.append(this.depth);