001package org.apache.commons.jcs3.utils.discovery; 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.util.concurrent.ConcurrentHashMap; 023import java.util.concurrent.ConcurrentMap; 024 025import org.apache.commons.jcs3.engine.behavior.ICompositeCacheManager; 026import org.apache.commons.jcs3.engine.behavior.IElementSerializer; 027import org.apache.commons.jcs3.engine.behavior.IProvideScheduler; 028import org.apache.commons.jcs3.log.Log; 029import org.apache.commons.jcs3.log.LogManager; 030import org.apache.commons.jcs3.utils.serialization.StandardSerializer; 031 032/** 033 * This manages UDPDiscovery Services. We should end up with one service per Lateral Cache Manager 034 * Instance. One service works for multiple regions. We don't want a connection for each region. 035 */ 036public class UDPDiscoveryManager 037{ 038 /** The logger */ 039 private static final Log log = LogManager.getLog( UDPDiscoveryManager.class ); 040 041 /** Singleton instance */ 042 private static final UDPDiscoveryManager INSTANCE = new UDPDiscoveryManager(); 043 044 /** Known services */ 045 private final ConcurrentMap<String, UDPDiscoveryService> services = new ConcurrentHashMap<>(); 046 047 /** private for singleton */ 048 private UDPDiscoveryManager() 049 { 050 // noopt 051 } 052 053 /** 054 * Singleton 055 * <p> 056 * @return UDPDiscoveryManager 057 */ 058 public static UDPDiscoveryManager getInstance() 059 { 060 return INSTANCE; 061 } 062 063 064 /** 065 * Creates a service for the address and port if one doesn't exist already. 066 * <p> 067 * We need to key this using the listener port too. 068 * TODO think of making one discovery service work for multiple types of clients. 069 * <p> 070 * @param discoveryAddress 071 * @param discoveryPort 072 * @param servicePort 073 * @param cacheMgr 074 * @return UDPDiscoveryService 075 * @deprecated Specify serializer implementation explicitly, allow to specify udpTTL 076 */ 077 @Deprecated 078 public UDPDiscoveryService getService( final String discoveryAddress, final int discoveryPort, final int servicePort, 079 final ICompositeCacheManager cacheMgr ) 080 { 081 return getService(discoveryAddress, discoveryPort, null, servicePort, 0, 082 cacheMgr, new StandardSerializer()); 083 } 084 085 /** 086 * Creates a service for the address and port if one doesn't exist already. 087 * <p> 088 * We need to key this using the listener port too. 089 * TODO think of making one discovery service work for multiple types of clients. 090 * <p> 091 * @param discoveryAddress 092 * @param discoveryPort 093 * @param serviceAddress 094 * @param servicePort 095 * @param updTTL 096 * @param cacheMgr 097 * @param serializer 098 * 099 * @return UDPDiscoveryService 100 * @since 3.1 101 */ 102 public UDPDiscoveryService getService( final String discoveryAddress, final int discoveryPort, 103 final String serviceAddress, final int servicePort, final int updTTL, 104 final ICompositeCacheManager cacheMgr, final IElementSerializer serializer ) 105 { 106 final String key = String.join(":", discoveryAddress, String.valueOf(discoveryPort), String.valueOf(servicePort)); 107 108 final UDPDiscoveryService service = services.computeIfAbsent(key, k -> { 109 log.info( "Creating service for address:port:servicePort [{0}]", key ); 110 111 final UDPDiscoveryAttributes attributes = new UDPDiscoveryAttributes(); 112 attributes.setUdpDiscoveryAddr(discoveryAddress); 113 attributes.setUdpDiscoveryPort(discoveryPort); 114 attributes.setServiceAddress(serviceAddress); 115 attributes.setServicePort(servicePort); 116 attributes.setUdpTTL(updTTL); 117 118 final UDPDiscoveryService newService = new UDPDiscoveryService(attributes, serializer); 119 120 // register for shutdown notification 121 cacheMgr.registerShutdownObserver( newService ); 122 123 // inject scheduler 124 if ( cacheMgr instanceof IProvideScheduler) 125 { 126 newService.setScheduledExecutorService(((IProvideScheduler)cacheMgr) 127 .getScheduledExecutorService()); 128 } 129 130 newService.startup(); 131 return newService; 132 }); 133 134 log.debug( "Returning service [{0}] for key [{1}]", service, key ); 135 136 return service; 137 } 138}