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CatchUpClientIT.java
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CatchUpClientIT.java
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/*
* Copyright (c) 2002-2018 "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.causalclustering.catchup;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.MessageToByteEncoder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.nio.channels.ClosedChannelException;
import java.time.Clock;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.neo4j.causalclustering.catchup.storecopy.GetStoreIdRequest;
import org.neo4j.causalclustering.net.Server;
import org.neo4j.helpers.AdvertisedSocketAddress;
import org.neo4j.helpers.ListenSocketAddress;
import org.neo4j.kernel.lifecycle.LifeSupport;
import org.neo4j.kernel.lifecycle.LifecycleException;
import org.neo4j.logging.NullLogProvider;
import org.neo4j.ports.allocation.PortAuthority;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class CatchUpClientIT
{
private LifeSupport lifeSupport;
@Before
public void initLifeCycles()
{
lifeSupport = new LifeSupport();
}
@After
public void shutdownLifeSupport()
{
lifeSupport.stop();
lifeSupport.shutdown();
}
@Test
public void shouldCloseHandlerIfChannelIsClosedInClient() throws LifecycleException
{
// given
String hostname = "localhost";
int port = PortAuthority.allocatePort();
ListenSocketAddress listenSocketAddress = new ListenSocketAddress( hostname, port );
AtomicBoolean wasClosedByClient = new AtomicBoolean( false );
Server emptyServer = catchupServer( listenSocketAddress );
CatchUpClient closingClient = closingChannelCatchupClient( wasClosedByClient );
lifeSupport.add( emptyServer );
lifeSupport.add( closingClient );
// when
lifeSupport.init();
lifeSupport.start();
// then
assertClosedChannelException( hostname, port, closingClient );
assertTrue( wasClosedByClient.get() );
}
@Test
public void shouldCloseHandlerIfChannelIsClosedOnServer()
{
// given
String hostname = "localhost";
int port = PortAuthority.allocatePort();
ListenSocketAddress listenSocketAddress = new ListenSocketAddress( hostname, port );
AtomicBoolean wasClosedByServer = new AtomicBoolean( false );
Server closingChannelServer = closingChannelCatchupServer( listenSocketAddress, wasClosedByServer );
CatchUpClient emptyClient = emptyClient();
lifeSupport.add( closingChannelServer );
lifeSupport.add( emptyClient );
// when
lifeSupport.init();
lifeSupport.start();
// then
assertClosedChannelException( hostname, port, emptyClient );
assertTrue( wasClosedByServer.get() );
}
private CatchUpClient emptyClient()
{
return catchupClient( new MessageToByteEncoder<GetStoreIdRequest>()
{
@Override
protected void encode( ChannelHandlerContext channelHandlerContext, GetStoreIdRequest getStoreIdRequest, ByteBuf byteBuf )
{
byteBuf.writeByte( (byte) 1 );
}
} );
}
private void assertClosedChannelException( String hostname, int port, CatchUpClient closingClient )
{
try
{
closingClient.makeBlockingRequest( new AdvertisedSocketAddress( hostname, port ), new GetStoreIdRequest(), neverCompletingAdaptor() );
fail();
}
catch ( CatchUpClientException e )
{
Throwable cause = e.getCause();
assertEquals( cause.getClass(), ExecutionException.class );
Throwable actualCause = cause.getCause();
assertEquals( actualCause.getClass(), ClosedChannelException.class );
}
}
private CatchUpResponseAdaptor<Object> neverCompletingAdaptor()
{
return new CatchUpResponseAdaptor<>();
}
private CatchUpClient closingChannelCatchupClient( AtomicBoolean wasClosedByClient )
{
return catchupClient( new MessageToByteEncoder()
{
@Override
protected void encode( ChannelHandlerContext ctx, Object msg, ByteBuf out )
{
wasClosedByClient.set( true );
ctx.channel().close();
}
} );
}
private Server closingChannelCatchupServer( ListenSocketAddress listenSocketAddress, AtomicBoolean wasClosedByServer )
{
return catchupServer( listenSocketAddress, new ByteToMessageDecoder()
{
@Override
protected void decode( ChannelHandlerContext ctx, ByteBuf byteBuf, List<Object> list )
{
wasClosedByServer.set( true );
ctx.channel().close();
}
} );
}
private CatchUpClient catchupClient( ChannelHandler... channelHandlers )
{
return new CatchUpClient( NullLogProvider.getInstance(), Clock.systemUTC(), 10000, catchUpResponseHandler -> new ChannelInitializer<SocketChannel>()
{
@Override
protected void initChannel( SocketChannel ch )
{
ch.pipeline().addLast( channelHandlers );
}
} );
}
private Server catchupServer( ListenSocketAddress listenSocketAddress, ChannelHandler... channelHandlers )
{
return new Server( channel -> channel.pipeline().addLast( channelHandlers ), listenSocketAddress, "empty-test-server" );
}
}