org.apache.openjpa.kernel.AbstractLockManager Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.kernel;
import java.util.Collection;
import java.util.Iterator;
import org.apache.openjpa.conf.OpenJPAConfiguration;
import org.apache.openjpa.lib.log.Log;
/**
* Abstract {@link LockManager} implementation.
*
* @author Marc Prud'hommeaux
*/
public abstract class AbstractLockManager
implements LockManager {
/**
* The context against which this LockManager is operating.
*/
protected StoreContext ctx;
/**
* Runtime log to write locking messages to.
*/
protected Log log;
public void setContext(StoreContext ctx) {
this.ctx = ctx;
this.log = ctx.getConfiguration().getLog
(OpenJPAConfiguration.LOG_RUNTIME);
}
public StoreContext getContext() {
return ctx;
}
/**
* Delegates to {@link LockManager#lock} with each element of the collection
*/
public void lockAll(Collection sms, int level, int timeout,
Object context) {
for (Iterator itr = sms.iterator(); itr.hasNext();)
lock((OpenJPAStateManager) itr.next(), level, timeout, context);
}
/**
* Does nothing by default.
*/
public void beginTransaction() {
}
/**
* Does nothing by default.
*/
public void endTransaction() {
}
/**
* Does nothing by default.
*/
public void close () {
}
/**
* Default not to skip relation field to maintain PessimisticLockManager semantics.
*/
public boolean skipRelationFieldLock() {
return false;
}
}