org.neo4j.cluster.timeout.MessageTimeoutStrategy Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ongdb-cluster Show documentation

Library implementing Paxos and Heartbeat components required for High Availability Neo4j

The newest version!

/*
 * Copyright (c) 2018-2020 "Graph Foundation"
 * Graph Foundation, Inc. [https://graphfoundation.org]
 *
 * Copyright (c) 2002-2018 "Neo4j,"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of ONgDB Enterprise Edition. The included source
 * code can be redistributed and/or modified under the terms of the
 * GNU AFFERO GENERAL PUBLIC LICENSE Version 3
 * (http://www.fsf.org/licensing/licenses/agpl-3.0.html) as found
 * in the associated LICENSE.txt file.
 *
 * 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.
 */
package org.neo4j.cluster.timeout;

import java.util.HashMap;
import java.util.Map;

import org.neo4j.cluster.com.message.Message;
import org.neo4j.cluster.com.message.MessageType;

/**
 * Timeout strategy that allows you to specify per message type what timeout to use
 */
public class MessageTimeoutStrategy
        implements TimeoutStrategy
{
    private Map timeouts = new HashMap<>();

    private TimeoutStrategy delegate;

    public MessageTimeoutStrategy( TimeoutStrategy delegate )
    {
        this.delegate = delegate;
    }

    public MessageTimeoutStrategy timeout( MessageType messageType, long timeout )
    {
        timeouts.put( messageType, timeout );
        return this;
    }

    public MessageTimeoutStrategy relativeTimeout( MessageType messageType, MessageType relativeTo, long timeout )
    {
        timeouts.put( messageType, timeouts.get( relativeTo ) + timeout );
        return this;
    }

    @Override
    public long timeoutFor( Message message )
    {
        Long timeout = timeouts.get( message.getMessageType() );
        if ( timeout == null )
        {
            return delegate.timeoutFor( message );
        }
        else
        {
            return timeout;
        }
    }

    @Override
    public void timeoutTriggered( Message timeoutMessage )
    {
        delegate.timeoutTriggered( timeoutMessage );
    }

    @Override
    public void timeoutCancelled( Message timeoutMessage )
    {
        delegate.timeoutCancelled( timeoutMessage );
    }

    @Override
    public void tick( long now )
    {
        delegate.tick( now );
    }
}