001package org.apache.commons.jcs3.engine;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.rmi.dgc.VMID;
023
024/**
025 * This is a static variable holder for the distribution auxiliaries that need something like a vmid.
026 */
027public final class CacheInfo
028{
029    /** shouldn't be instantiated */
030    private CacheInfo()
031    {
032    }
033
034    /**
035     * Used to identify a client, so we can run multiple clients off one host.
036     * Need since there is no way to identify a client other than by host in
037     * rmi.
038     * <p>
039     * TODO: may have some trouble in failover mode if the cache keeps its old
040     * id. We may need to reset this when moving into failover.
041     */
042    private static final VMID vmid = new VMID();
043
044    /** By default this is the hash code of the VMID */
045    public static final long listenerId = vmid.hashCode();
046}