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litesoft / trunk / Java / core / Server / src / org / litesoft / peertopeer / nonpublic / peermanagement / PeerConnectionManager.java
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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.peertopeer.nonpublic.peermanagement; import java.io.*; import java.net.*; import java.util.*; import java.util.concurrent.*; import org.litesoft.core.typeutils.*; import org.litesoft.logger.*; import org.litesoft.peertopeer.*; import org.litesoft.peertopeer.nonpublic.*; public class PeerConnectionManager implements P2PConstants { public static final Logger LOGGER = LoggerFactory.getLogger( PeerConnectionManager.class ); private PeerDefinition mOurDefinition = null; private PeerDefs mPendingPeers = new PeerDefs(); private ActivePeers mActivePeers = new ActivePeers(); private MessageFromPeerHandlerManager mMessageFromPeerHandlerManager; private PeerManager mPeerManager; private boolean mOKtoRunIfIncompatibleVersionAlreadyRunning; private ReceivedThread mReceivedThread = null; public PeerConnectionManager( MessageFromPeerHandlerManager pMessageFromPeerHandlerManager, PeerManager pPeerManager, boolean pOKtoRunIfIncompatibleVersionAlreadyRunning ) { Objects.assertNotNull( "MessageFromPeerHandlerManager", // mMessageFromPeerHandlerManager = pMessageFromPeerHandlerManager ); Objects.assertNotNull( "PeerManager", mPeerManager = pPeerManager ); mOKtoRunIfIncompatibleVersionAlreadyRunning = pOKtoRunIfIncompatibleVersionAlreadyRunning; } public boolean isOKtoRunIfIncompatibleVersionAlreadyRunning() { return mOKtoRunIfIncompatibleVersionAlreadyRunning; } public synchronized void setOurConnectionInfo( String pOurName, InetAddress pOurServerAddress, int pOurServerPort ) { Objects.assertNotNull( "OurServerAddress", pOurServerAddress ); if ( mOurDefinition != null ) { throw new IllegalStateException( "setOurConnectionInfo() already called with: " + mOurDefinition ); } mOurDefinition = new PeerDefinition( pOurName, pOurServerAddress, pOurServerPort ); } public synchronized void addAnnouncedPeer( PeerDefinition pPeerDef ) { if ( (pPeerDef != null) && !pPeerDef.equals( mOurDefinition ) && !mPendingPeers.contains( pPeerDef ) && !mActivePeers.contains( pPeerDef ) ) { mPendingPeers.add( pPeerDef ); PeerList zPeerList = new PeerList( mOurDefinition, mActivePeers.getPeerDefs() ); new PeerConnectionHandlerAnnouncedPeer( this, pPeerDef, zPeerList ).start(); } } public void addFromPeer( PeerDefinition[] pPeerDefinitions ) { if ( pPeerDefinitions != null ) { for ( PeerDefinition zPeerDefinition : pPeerDefinitions ) { addAnnouncedPeer( zPeerDefinition ); } } } /** * @return null if we are already talking to this Peer OR we refuse to talk to it (i.e. it is null)? */ public synchronized BlockingQueue<Serializable> startPeeringWith( PeerConnectionHandler pPeerConnectionHandler ) { if ( pPeerConnectionHandler != null ) { PeerDefinition zPeerDef = pPeerConnectionHandler.getPeerDef(); if ( zPeerDef != null ) { if ( !mActivePeers.contains( zPeerDef ) ) { mPendingPeers.remove( zPeerDef ); mActivePeers.add( zPeerDef, pPeerConnectionHandler ); if ( mReceivedThread == null ) { mReceivedThread = new ReceivedThread(); mReceivedThread.start(); } resetWaitForPeersTimer(); return mReceivedThread.getReceiveQueue(); } LOGGER.error.log( "Attempt to duplicate Peer w/ " + zPeerDef ); } } return null; } public synchronized void noLongerPeeringWith( PeerDefinition pPeerDef ) { PeerConnectionHandler zPeerConnectionHandler = mActivePeers.remove( pPeerDef ); if ( zPeerConnectionHandler != null ) { zPeerConnectionHandler.close(); } } public synchronized void sendToPeers( Serializable pMessageToPeers ) { mActivePeers.sendToPeers( pMessageToPeers ); } public synchronized void aboutToJoinGroup() { resetWaitForPeersTimer(); } public synchronized void waitForPeers() { for ( long toWait; 0 < (toWait = getWaitForPeersTime()); ) { try { wait( toWait ); } catch ( InterruptedException e ) { // Whatever! } } } private long getWaitForPeersTime() { return (mWaitTillForPeers == null) ? 0 : (mWaitTillForPeers - System.currentTimeMillis()); } private Long mWaitTillForPeers = null; private void resetWaitForPeersTimer() { mWaitTillForPeers = System.currentTimeMillis() + MILLISEC_TIME_OUT_WAITING_FOR_PEER; } private static class PeerDefs { private Set<PeerDefinition> mPeerDefinitions = new HashSet<PeerDefinition>(); public boolean hasAny() { return !mPeerDefinitions.isEmpty(); } public boolean contains( PeerDefinition pPeerDef ) { return mPeerDefinitions.contains( pPeerDef ); } public void add( PeerDefinition pPeerDef ) { mPeerDefinitions.add( pPeerDef ); } public void remove( PeerDefinition pPeerDef ) { mPeerDefinitions.remove( pPeerDef ); } } private static class ActivePeers { private Map<PeerDefinition, PeerConnectionHandler> mPeers = new HashMap<PeerDefinition, PeerConnectionHandler>(); private PeerDefinition[] mCachedPeerDefPeers = null; public PeerDefinition[] getPeerDefs() { if ( mCachedPeerDefPeers == null ) { mCachedPeerDefPeers = mPeers.isEmpty() ? // PeerDefinition.EMPTY_ARRAY : // mPeers.keySet().toArray( new PeerDefinition[mPeers.keySet().size()] ); } return mCachedPeerDefPeers; } public boolean contains( PeerDefinition pPeerDef ) { return mPeers.containsKey( pPeerDef ); } public PeerConnectionHandler remove( PeerDefinition pPeerDef ) { PeerConnectionHandler zHandler = mPeers.remove( pPeerDef ); if ( zHandler != null ) { mCachedPeerDefPeers = null; System.out.println( "--- Removed Peer: " + pPeerDef ); } return zHandler; } public void add( PeerDefinition pPeerDef, PeerConnectionHandler pPeerConnectionHandler ) { mCachedPeerDefPeers = null; mPeers.put( pPeerDef, pPeerConnectionHandler ); System.out.println( "+++++ Added Peer: " + pPeerDef ); } public void sendToPeers( Serializable pMessageToPeers ) { for ( PeerConnectionHandler zHandler : mPeers.values() ) { zHandler.send( pMessageToPeers ); } } } private class ReceivedThread extends Thread { private BlockingQueue<Serializable> mReceiveQueue = new LinkedBlockingQueue<Serializable>(); public ReceivedThread() { setName( getClass().getName() ); setDaemon( true ); } public BlockingQueue<Serializable> getReceiveQueue() { return mReceiveQueue; } private Serializable getFromQueue() { while ( true ) { try { return mReceiveQueue.take(); } catch ( InterruptedException e ) { // Whatever... } } } @SuppressWarnings({"InfiniteLoopStatement"}) @Override public void run() { while ( true ) { processFromQueue( getFromQueue() ); } } private void processFromQueue( Serializable pSerializable ) { MessageFromPeerHandler[] zHandlers = mMessageFromPeerHandlerManager.getHandlers(); for ( MessageFromPeerHandler zHandler : zHandlers ) { try { if ( zHandler.handle( pSerializable, mPeerManager ) ) { return; } } catch ( Exception e ) { LOGGER.error.log( e ); } } LOGGER.info.log( "No MessageFromPeerHandler interested in: ", pSerializable ); } } } |