/*
* Licensed 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.aries.subsystem.core.internal;
public class SubsystemIdentifier {
private static long lastId;
synchronized static long getLastId() {
return lastId;
}
synchronized static long getNextId() {
if (Long.MAX_VALUE == lastId)
throw new IllegalStateException("The next subsystem ID would exceed Long.MAX_VALUE: " + lastId);
// First ID will be 1.
return ++lastId;
}
synchronized static void setLastId(long id) {
lastId = id;
}
}