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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;
import io.netty.channel.ChannelInboundHandler;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import java.util.concurrent.CompletableFuture;
import java.util.function.Consumer;
import org.neo4j.coreedge.catchup.CatchupClientProtocol.NextMessage;
import org.neo4j.coreedge.catchup.storecopy.FileContentDecoder;
import org.neo4j.coreedge.catchup.storecopy.FileHeaderDecoder;
import org.neo4j.coreedge.catchup.storecopy.GetStoreIdRequest;
import org.neo4j.coreedge.catchup.storecopy.GetStoreIdResponseDecoder;
import org.neo4j.coreedge.catchup.storecopy.GetStoreRequest;
import org.neo4j.coreedge.catchup.storecopy.StoreCopyFinishedResponseDecoder;
import org.neo4j.coreedge.catchup.storecopy.StoreFileReceiver;
import org.neo4j.coreedge.catchup.storecopy.StoreFileStreamingCompleteListener;
import org.neo4j.coreedge.catchup.storecopy.StoreFileStreams;
import org.neo4j.coreedge.catchup.storecopy.StoreIdReceiver;
import org.neo4j.coreedge.catchup.tx.PullRequestMonitor;
import org.neo4j.coreedge.catchup.tx.TxPullRequest;
import org.neo4j.coreedge.catchup.tx.TxPullResponse;
import org.neo4j.coreedge.catchup.tx.TxPullResponseDecoder;
import org.neo4j.coreedge.catchup.tx.TxPullResponseListener;
import org.neo4j.coreedge.catchup.tx.TxStreamCompleteListener;
import org.neo4j.coreedge.catchup.tx.TxStreamFinishedResponseDecoder;
import org.neo4j.coreedge.core.state.snapshot.CoreSnapshot;
import org.neo4j.coreedge.core.state.snapshot.CoreSnapshotDecoder;
import org.neo4j.coreedge.core.state.snapshot.CoreSnapshotListener;
import org.neo4j.coreedge.core.state.snapshot.CoreSnapshotRequest;
import org.neo4j.coreedge.discovery.TopologyService;
import org.neo4j.coreedge.identity.MemberId;
import org.neo4j.coreedge.identity.StoreId;
import org.neo4j.coreedge.messaging.CoreOutbound;
import org.neo4j.coreedge.messaging.Message;
import org.neo4j.coreedge.messaging.NonBlockingChannels;
import org.neo4j.coreedge.messaging.Outbound;
import org.neo4j.coreedge.messaging.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, StoreIdReceiver,
StoreFileStreamingCompleteListener, TxStreamCompleteListener, TxPullResponseListener, CoreSnapshotListener
{
private final LogProvider logProvider;
private final SenderService senderService;
private final Outbound<MemberId,Message> outbound;
private final PullRequestMonitor pullRequestMonitor;
private final Listeners<StoreFileStreamingCompleteListener> storeFileStreamingCompleteListeners = new Listeners<>();
private final Listeners<TxStreamCompleteListener> txStreamCompleteListeners = new Listeners<>();
private final Listeners<TxPullResponseListener> txPullResponseListeners = new Listeners<>();
private StoreFileStreams storeFileStreams;
private Consumer<StoreId> storeIdConsumer;
private CompletableFuture<CoreSnapshot> coreSnapshotFuture;
public CoreClient( LogProvider logProvider, ChannelInitializer<SocketChannel> channelInitializer, Monitors monitors,
int maxQueueSize, NonBlockingChannels nonBlockingChannels, TopologyService discoveryService, long logThresholdMillis )
{
this.logProvider = logProvider;
this.senderService =
new SenderService( channelInitializer, logProvider, monitors, maxQueueSize, nonBlockingChannels );
this.outbound = new CoreOutbound( discoveryService, senderService, logProvider, logThresholdMillis );
this.pullRequestMonitor = monitors.newMonitor( PullRequestMonitor.class );
}
public void requestStore( MemberId serverAddress )
{
GetStoreRequest getStoreRequest = new GetStoreRequest();
send( serverAddress, RequestMessageType.STORE, getStoreRequest );
}
public void requestStoreId( MemberId serverAddress )
{
GetStoreIdRequest getStoreIdRequest = new GetStoreIdRequest();
send( serverAddress, RequestMessageType.STORE_ID, getStoreIdRequest );
}
public CompletableFuture<CoreSnapshot> requestCoreSnapshot( MemberId serverAddress )
{
coreSnapshotFuture = new CompletableFuture<>();
CoreSnapshotRequest coreSnapshotRequest = new CoreSnapshotRequest();
send( serverAddress, RequestMessageType.RAFT_STATE, coreSnapshotRequest );
return coreSnapshotFuture;
}
public void pollForTransactions( MemberId serverAddress, StoreId storeId, long lastTransactionId )
{
TxPullRequest txPullRequest = new TxPullRequest( lastTransactionId, storeId );
send( serverAddress, RequestMessageType.TX_PULL_REQUEST, txPullRequest );
pullRequestMonitor.txPullRequest( lastTransactionId );
}
private void send( MemberId to, RequestMessageType messageType, Message contentMessage )
{
outbound.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;
}
public void setStoreIdConsumer( Consumer<StoreId> storeIdConsumer )
{
this.storeIdConsumer = storeIdConsumer;
}
@Override
public void onFileStreamingComplete( long lastCommittedTxBeforeStoreCopy )
{
storeFileStreamingCompleteListeners.notify( listener -> listener.onFileStreamingComplete( lastCommittedTxBeforeStoreCopy ) );
}
@Override
public void onTxStreamingComplete( long lastTransactionId, boolean success )
{
txStreamCompleteListeners.notify( listener -> listener.onTxStreamingComplete( lastTransactionId, success ) );
}
@Override
public void onTxReceived( final TxPullResponse tx )
{
txPullResponseListeners.notify( listener -> listener.onTxReceived( tx ) );
}
@Override
public void onStoreIdReceived( final StoreId storeId )
{
storeIdConsumer.accept( storeId );
}
@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 );
}
protected ChannelInboundHandler decoders( CatchupClientProtocol protocol )
{
RequestDecoderDispatcher<NextMessage> decoderDispatcher =
new RequestDecoderDispatcher<>( protocol, logProvider );
decoderDispatcher.register( NextMessage.STORE_ID, new GetStoreIdResponseDecoder() );
decoderDispatcher.register( NextMessage.TX_PULL_RESPONSE, new TxPullResponseDecoder() );
decoderDispatcher.register( NextMessage.CORE_SNAPSHOT, new CoreSnapshotDecoder() );
decoderDispatcher.register( NextMessage.STORE_COPY_FINISHED, new StoreCopyFinishedResponseDecoder() );
decoderDispatcher.register( NextMessage.TX_STREAM_FINISHED, new TxStreamFinishedResponseDecoder() );
decoderDispatcher.register( NextMessage.FILE_HEADER, new FileHeaderDecoder() );
decoderDispatcher.register( NextMessage.FILE_CONTENTS, new FileContentDecoder() );
return decoderDispatcher;
}
}