/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.jboss.as.protocol.mgmt;
import java.util.HashSet;
import java.util.Set;
/**
* Responsible for generating new unique batch ids on the server side
* of a channel. The batch ids are used to group several individual channel requests
* that make up a larger use case.
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @version $Revision: 1.1 $
*/
public interface ManagementBatchIdManager {
/**
* Block a given batch id, when using shared transports.
*
* @param id the id
* @return true if this did not already contain the id
*/
boolean lockBatchId(int id);
/**
* Creates a batch id. Once the batch has completed
* {@link ManagementBatchIdManager#freeBatchId} must be called.
*
* @return the created batch id
*/
int createBatchId();
/**
* Frees a batch id.
*
* @param id the batch id to be freed.
*/
void freeBatchId(int id);
class DefaultManagementBatchIdManager implements ManagementBatchIdManager {
private final Set<Integer> ids = new HashSet<Integer>();
@Override
public synchronized boolean lockBatchId(int id) {
if(ids.contains(id)) {
return false;
}
ids.add(id);
return true;
}
@Override
public synchronized int createBatchId() {
int next = (int)(Math.random() * Integer.MAX_VALUE);
while (ids.contains(next)) {
next = (int)(Math.random() * Integer.MAX_VALUE);
}
ids.add(next);
return next;
}
@Override
public synchronized void freeBatchId(int id) {
ids.remove(id);
}
}
}