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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.GWT.eventbus.server.nonpublic; import java.util.*; import org.litesoft.GWT.eventbus.client.nonpublic.*; import org.litesoft.GWT.eventbus.client.rpc.*; import org.litesoft.commonfoundation.base.*; import org.litesoft.logger.*; public class ServerSideRemotePeerService implements RemotePeerService { private final MillisecTimeSource mMillisecTimeSource; private final Set<String> mAddPeerInterestsForClient = new HashSet<String>(); private final Set<String> mRemovePeerInterestsForClient = new HashSet<String>(); private final List<ChannelEventPackage> mChannelEventsForClient = new ArrayList<ChannelEventPackage>(); private final Set<String> mAckPeerInterestsForClient = new HashSet<String>(); private final Logger mLogger; private Long mGiveUpAfter = null; private PeerSupportingEventBus mServerEventBus; public ServerSideRemotePeerService( MillisecTimeSource pMillisecTimeSource, Logger pLogger, PeerSupportingEventBus pServerEventBus ) { mMillisecTimeSource = MillisecTimeSource.deNull( pMillisecTimeSource ); mLogger = pLogger; mServerEventBus = (pServerEventBus != null) ? // pServerEventBus : // PeerSupportingEventBus.Null.INSTANCE; } public ServerSideRemotePeerService( Logger pLogger, PeerSupportingEventBus pServerEventBus ) { this( null, pLogger, pServerEventBus ); } private synchronized void setGiveUpAfter( int pPollMillisecs ) { if ( pPollMillisecs > 0 ) { mGiveUpAfter = mMillisecTimeSource.now() + pPollMillisecs + 60000L * 5; // 5 minutes } } private boolean okToCollect() // synchronized by forwardTo() { return (mGiveUpAfter == null) || (mMillisecTimeSource.now() < mGiveUpAfter); } private synchronized PeerSupportingEventBus getServerEventBus() { return mServerEventBus; } private synchronized void clrServerEventBus() { mServerEventBus = PeerSupportingEventBus.Null.INSTANCE; } public void stopUnrequestedMessages() { } public synchronized RemotePeerService dispose() { mLogger.trace.log( "Dispose: ServerSideRemotePeerService" ); mAddPeerInterestsForClient.clear(); mRemovePeerInterestsForClient.clear(); mChannelEventsForClient.clear(); mServerEventBus = PeerSupportingEventBus.Null.INSTANCE; return RemotePeerService.Null.INSTANCE; } public synchronized boolean forwardTo( ChannelServicePackage pToClient ) { if ( pToClient != null ) { if ( pToClient.anyAddPeerInterests() ) { for ( String peerInterest : pToClient.getAddPeerInterests() ) { mAddPeerInterestsForClient.add( peerInterest ); } } if ( pToClient.anyRemovePeerInterests() ) { for ( String peerInterest : pToClient.getRemovePeerInterests() ) { mRemovePeerInterestsForClient.add( peerInterest ); } } if ( pToClient.anyEvents() ) { for ( ChannelEventPackage event : pToClient.getEvents() ) { mChannelEventsForClient.add( event ); } } if ( pToClient.anyAckPeerInterests() ) { for ( String ackInterest : pToClient.getAckPeerInterests() ) { mAckPeerInterestsForClient.add( ackInterest ); } } } return okToCollect(); } public ChannelServicePackage processClientRequest( int pPollMillisecs, ChannelServicePackage pFromClient ) { setGiveUpAfter( pPollMillisecs ); PeerSupportingEventBus eventBus = getServerEventBus(); boolean peerOK; if ( (pFromClient != null) && pFromClient.isNotEmpty() ) { peerOK = eventBus.propagateFromRemotePeerService( pFromClient ); } else { peerOK = eventBus.ping(); } if ( !peerOK ) { clrServerEventBus(); } synchronized ( this ) { return new ChannelServicePackage( extractAddPeerInterestsForClient(), // extractRemovePeerInterestsForClient(), // extractChannelEventsForClient(), // extractAckPeerInterestsForClient() ); } } public String toString() { return "ServerSideRemotePeerService"; } private String[] extractAddPeerInterestsForClient() // synchronized in processClientRequest() { String[] rv = mAddPeerInterestsForClient.toArray( new String[mAddPeerInterestsForClient.size()] ); mAddPeerInterestsForClient.clear(); return rv; } private String[] extractRemovePeerInterestsForClient() // synchronized in processClientRequest() { String[] rv = mRemovePeerInterestsForClient.toArray( new String[mRemovePeerInterestsForClient.size()] ); mRemovePeerInterestsForClient.clear(); return rv; } private ChannelEventPackage[] extractChannelEventsForClient() // synchronized in processClientRequest() { ChannelEventPackage[] rv = mChannelEventsForClient.toArray( new ChannelEventPackage[mChannelEventsForClient.size()] ); mChannelEventsForClient.clear(); return rv; } private String[] extractAckPeerInterestsForClient() // synchronized in processClientRequest() { String[] rv = mAckPeerInterestsForClient.toArray( new String[mAckPeerInterestsForClient.size()] ); mAckPeerInterestsForClient.clear(); return rv; } } |