/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.capedwarf.cluster;
import org.infinispan.AdvancedCache;
import org.jboss.capedwarf.common.infinispan.NewTxTask;
/**
* Key range update task.
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
public class KeyRangeUpdateTask extends NewTxTask<String, Long, Void> {
private final long id;
private final String sequenceName;
private final long allocationSize;
public KeyRangeUpdateTask(long id, String sequenceName, long allocationSize) {
this.id = id;
this.sequenceName = sequenceName;
this.allocationSize = allocationSize;
}
protected Void callInTx() throws Exception {
final AdvancedCache<String, Long> ac = getCache().getAdvancedCache();
final String cacheKey = sequenceName;
if (ac.lock(cacheKey) == false)
throw new IllegalArgumentException("Cannot get a lock on id generator for " + cacheKey);
Long currentId = ac.get(cacheKey);
if (currentId == null || currentId <= id) {
ac.put(cacheKey, id + allocationSize);
}
return null;
}
}