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UpdateLock.java
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UpdateLock.java
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/*
* Copyright (c) 2002-2019 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.store.kvstore;
import java.util.concurrent.locks.ReentrantReadWriteLock;
class UpdateLock extends ReentrantReadWriteLock
{
UpdateLock()
{
super( true /* always fair */ );
}
@Override
public String toString()
{
return "AbstractKeyValyeStore-UpdateLock[owner = " + getOwner() +
", is write locked = " + isWriteLocked() +
", writer holds count = " + getWriteHoldCount() +
", read holds count = " + getReadHoldCount() +
", readers count = " + getReadLockCount() +
", threads waiting for write lock = " + getQueuedWriterThreads() +
", threads waiting for read lock = " + getQueuedReaderThreads() +
"] " + super.toString();
}
}