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org.apache.jcs.auxiliary.lateral.socket.tcp.discovery.UDPDiscoveryManager	95%	100%

1		package org.apache.jcs.auxiliary.lateral.socket.tcp.discovery;
2
3		/*
4		* Licensed to the Apache Software Foundation (ASF) under one
5		* or more contributor license agreements. See the NOTICE file
6		* distributed with this work for additional information
7		* regarding copyright ownership. The ASF licenses this file
8		* to you under the Apache License, Version 2.0 (the
9		* "License"); you may not use this file except in compliance
10		* with the License. You may obtain a copy of the License at
11		*
12		* http://www.apache.org/licenses/LICENSE-2.0
13		*
14		* Unless required by applicable law or agreed to in writing,
15		* software distributed under the License is distributed on an
16		* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17		* KIND, either express or implied. See the License for the
18		* specific language governing permissions and limitations
19		* under the License.
20		*/
21
22		import java.util.HashMap;
23		import java.util.Map;
24
25		import org.apache.commons.logging.Log;
26		import org.apache.commons.logging.LogFactory;
27		import org.apache.jcs.auxiliary.lateral.socket.tcp.behavior.ITCPLateralCacheAttributes;
28		import org.apache.jcs.engine.behavior.ICompositeCacheManager;
29
30		/**
31		* This manages UDPDiscovery Services. We should end up with one service per
32		* Lateral Cache Manager Instance. One service works for multiple regions. We
33		* don't want a connection for each region.
34		*
35		* @author Aaron Smuts
36		*
37		*/
38		public class UDPDiscoveryManager
39		{
40	26	private final static Log log = LogFactory.getLog( UDPDiscoveryManager.class );
41
42	13	private static UDPDiscoveryManager INSTANCE = new UDPDiscoveryManager();
43
44	13	private Map services = new HashMap();
45
46		private UDPDiscoveryManager()
47	13	{
48		// noopt
49	13	}
50
51		/**
52		* Singelton
53		*
54		* @return UDPDiscoveryManager
55		*/
56		public static UDPDiscoveryManager getInstance()
57		{
58	26	return INSTANCE;
59		}
60
61		/**
62		* Returns the UDP Discovery service associated with this instance.
63		*
64		* @param lca
65		* ITCPLateralCacheAttributes
66		* @param cacheMgr
67		* @return
68		*/
69		public synchronized UDPDiscoveryService getService( ITCPLateralCacheAttributes lca, ICompositeCacheManager cacheMgr )
70		{
71	26	UDPDiscoveryService service = getService( lca.getUdpDiscoveryAddr(), lca.getUdpDiscoveryPort(), lca.getTcpListenerPort(), cacheMgr );
72
73		// TODO find a way to remote these attributes from the service, the manager needs it on disocvery.
74	26	service.setTcpLateralCacheAttributes( lca );
75	26	return service;
76		}
77
78		/**
79		* Creates a service for the address and port if one doesn't exist already.
80		* <p>
81		* TODO we may need to key this using the listener port too
82		*
83		* @param discoveryAddress
84		* @param discoveryPort
85		* @param servicePort
86		* @param cacheMgr
87		* @return
88		*/
89		public synchronized UDPDiscoveryService getService( String discoveryAddress, int discoveryPort, class="keyword">int servicePort,
90		ICompositeCacheManager cacheMgr )
91		{
92	26	String key = discoveryAddress + ":" + discoveryPort;
93
94	26	UDPDiscoveryService service = (UDPDiscoveryService) services.get( key );
95	26	if ( service == null )
96		{
97	13	if ( log.isInfoEnabled() )
98		{
99	13	log.info( "Creating service for address:port [" + key + "]" );
100		}
101
102	13	service = new UDPDiscoveryService( discoveryAddress, discoveryPort, servicePort, cacheMgr );
103	13	services.put( key, service );
104		}
105
106	26	if ( log.isDebugEnabled() )
107		{
108	0	log.debug( "Returning service [" + service + "] for key [" + key + "]" );
109		}
110
111	26	return service;
112
113		}
114
115		}

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