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CoreClient.java
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CoreClient.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.coreedge.catchup.storecopy;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import java.io.IOException;
import java.util.Arrays;
import java.util.concurrent.CompletableFuture;
import org.neo4j.coreedge.catchup.RequestMessageType;
import org.neo4j.coreedge.catchup.storecopy.core.CoreSnapshotListener;
import org.neo4j.coreedge.catchup.storecopy.core.CoreSnapshotRequest;
import org.neo4j.coreedge.catchup.storecopy.edge.GetStoreRequest;
import org.neo4j.coreedge.catchup.storecopy.edge.StoreFileReceiver;
import org.neo4j.coreedge.catchup.storecopy.edge.StoreFileStreamingCompleteListener;
import org.neo4j.coreedge.catchup.storecopy.edge.StoreFileStreams;
import org.neo4j.coreedge.catchup.tx.edge.PullRequestMonitor;
import org.neo4j.coreedge.catchup.tx.edge.TxPullRequest;
import org.neo4j.coreedge.catchup.tx.edge.TxPullResponse;
import org.neo4j.coreedge.catchup.tx.edge.TxPullResponseListener;
import org.neo4j.coreedge.catchup.tx.edge.TxStreamCompleteListener;
import org.neo4j.coreedge.network.Message;
import org.neo4j.coreedge.raft.state.CoreSnapshot;
import org.neo4j.coreedge.server.AdvertisedSocketAddress;
import org.neo4j.coreedge.server.NonBlockingChannels;
import org.neo4j.coreedge.server.SenderService;
import org.neo4j.helpers.Listeners;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
import org.neo4j.kernel.monitoring.Monitors;
import org.neo4j.logging.LogProvider;
import static java.util.Arrays.asList;
public abstract class CoreClient extends LifecycleAdapter implements StoreFileReceiver,
StoreFileStreamingCompleteListener,
TxStreamCompleteListener, TxPullResponseListener, CoreSnapshotListener
{
private final PullRequestMonitor pullRequestMonitor;
private StoreFileStreams storeFileStreams = null;
private final Listeners<StoreFileStreamingCompleteListener> storeFileStreamingCompleteListeners = new Listeners<>();
private final Listeners<TxStreamCompleteListener> txStreamCompleteListeners = new Listeners<>();
private final Listeners<TxPullResponseListener> txPullResponseListeners = new Listeners<>();
private CompletableFuture<CoreSnapshot> coreSnapshotFuture;
private SenderService senderService;
public CoreClient( LogProvider logProvider,
ChannelInitializer<SocketChannel> channelInitializer, Monitors monitors, int maxQueueSize,
NonBlockingChannels nonBlockingChannels )
{
this.senderService = new SenderService( channelInitializer, logProvider,
monitors, maxQueueSize, nonBlockingChannels );
this.pullRequestMonitor = monitors.newMonitor( PullRequestMonitor.class );
}
public void requestStore( AdvertisedSocketAddress serverAddress )
{
GetStoreRequest getStoreRequest = new GetStoreRequest();
send( serverAddress, RequestMessageType.STORE, getStoreRequest );
}
public CompletableFuture<CoreSnapshot> requestCoreSnapshot( AdvertisedSocketAddress serverAddress )
{
coreSnapshotFuture = new CompletableFuture<>();
CoreSnapshotRequest coreSnapshotRequest = new CoreSnapshotRequest();
send( serverAddress, RequestMessageType.RAFT_STATE, coreSnapshotRequest );
return coreSnapshotFuture;
}
public void pollForTransactions( AdvertisedSocketAddress serverAddress, long lastTransactionId )
{
TxPullRequest txPullRequest = new TxPullRequest( lastTransactionId );
send( serverAddress, RequestMessageType.TX_PULL_REQUEST, txPullRequest );
pullRequestMonitor.txPullRequest( lastTransactionId );
}
private void send( AdvertisedSocketAddress to, RequestMessageType messageType, Message contentMessage )
{
senderService.send( to, asList( messageType, contentMessage ) );
}
@Override
public void start() throws Throwable
{
senderService.start();
}
@Override
public void stop() throws Throwable
{
senderService.stop();
}
public void addTxPullResponseListener( TxPullResponseListener listener )
{
txPullResponseListeners.add( listener );
}
public void removeTxPullResponseListener( TxPullResponseListener listener )
{
txPullResponseListeners.remove( listener );
}
public void addStoreFileStreamingCompleteListener( StoreFileStreamingCompleteListener listener )
{
storeFileStreamingCompleteListeners.add( listener );
}
public void removeStoreFileStreamingCompleteListener( StoreFileStreamingCompleteListener listener )
{
storeFileStreamingCompleteListeners.remove( listener );
}
@Override
public StoreFileStreams getStoreFileStreams()
{
return storeFileStreams;
}
public void setStoreFileStreams( StoreFileStreams storeFileStreams )
{
this.storeFileStreams = storeFileStreams;
}
@Override
public void onFileStreamingComplete( long lastCommittedTxBeforeStoreCopy )
{
storeFileStreamingCompleteListeners.notify(
listener -> listener.onFileStreamingComplete( lastCommittedTxBeforeStoreCopy ) );
}
@Override
public void onTxStreamingComplete( long lastTransactionId )
{
txStreamCompleteListeners.notify( listener -> listener.onTxStreamingComplete( lastTransactionId ) );
}
@Override
public void onTxReceived( TxPullResponse tx ) throws IOException
{
txPullResponseListeners.notify( listener -> {
try
{
listener.onTxReceived( tx );
}
catch ( IOException e )
{
throw new RuntimeException( e );
}
} );
}
@Override
public void onSnapshotReceived( CoreSnapshot snapshot )
{
coreSnapshotFuture.complete( snapshot );
}
public void addTxStreamCompleteListener( TxStreamCompleteListener listener )
{
txStreamCompleteListeners.add( listener );
}
public void removeTxStreamCompleteListener( TxStreamCompleteListener listener )
{
txStreamCompleteListeners.remove( listener );
}
}