001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020 package org.apache.qpid.server.plugins;
021
022 import java.io.File;
023 import java.util.ArrayList;
024 import java.util.HashMap;
025 import java.util.List;
026 import java.util.Map;
027
028 import org.apache.felix.framework.Felix;
029 import org.apache.felix.framework.cache.BundleCache;
030 import org.apache.felix.framework.util.FelixConstants;
031 import org.apache.felix.framework.util.StringMap;
032 import org.apache.qpid.server.exchange.ExchangeType;
033 import org.apache.qpid.server.security.access.ACLPlugin;
034 import org.apache.qpid.server.security.access.ACLPluginFactory;
035 import org.apache.qpid.server.security.access.plugins.AllowAll;
036 import org.apache.qpid.server.security.access.plugins.DenyAll;
037 import org.apache.qpid.server.security.access.plugins.SimpleXML;
038 import org.osgi.framework.BundleActivator;
039 import org.osgi.framework.BundleException;
040 import org.osgi.util.tracker.ServiceTracker;
041
042 /**
043 *
044 * @author aidan
045 *
046 * Provides access to pluggable elements, such as exchanges
047 */
048
049 public class PluginManager
050 {
051
052 private Felix _felix = null;
053 private ServiceTracker _exchangeTracker = null;
054 private ServiceTracker _securityTracker = null;
055 private Activator _activator = null;
056 private boolean _empty;
057 private Map<String, ACLPluginFactory> _securityPlugins;
058
059 public PluginManager(String plugindir) throws Exception
060 {
061 StringMap configMap = new StringMap(false);
062
063 // Tell felix it's being embedded
064 configMap.put(FelixConstants.EMBEDDED_EXECUTION_PROP, "true");
065 // Add the bundle provided service interface package and the core OSGi
066 // packages to be exported from the class path via the system bundle.
067 configMap.put(FelixConstants.FRAMEWORK_SYSTEMPACKAGES, "org.osgi.framework; version=1.3.0,"
068 + "org.osgi.service.packageadmin; version=1.2.0," +
069 "org.osgi.service.startlevel; version=1.0.0," +
070 "org.osgi.service.url; version=1.0.0," +
071 "org.apache.qpid.framing; version=0.2.1," +
072 "org.apache.qpid.server.exchange; version=0.2.1," +
073 "org.apache.qpid.server.management; version=0.2.1,"+
074 "org.apache.qpid.protocol; version=0.2.1,"+
075 "org.apache.qpid.server.virtualhost; version=0.2.1," +
076 "org.apache.qpid; version=0.2.1," +
077 "org.apache.qpid.server.queue; version=0.2.1," +
078 "javax.management.openmbean; version=1.0.0,"+
079 "javax.management; version=1.0.0,"+
080 "org.apache.qpid.junit.extensions.util; version=0.6.1,"
081 );
082
083 if (plugindir == null)
084 {
085 _empty = true;
086 return;
087 }
088
089 // Set the list of bundles to load
090 File dir = new File(plugindir);
091 if (!dir.exists())
092 {
093 _empty = true;
094 return;
095 }
096 StringBuffer pluginJars = new StringBuffer();
097
098 if (dir.isDirectory())
099 {
100 for (String child : dir.list())
101 {
102 if (child.endsWith("jar"))
103 {
104 pluginJars.append(String.format(" file:%s%s%s", plugindir,File.separator,child));
105 }
106 }
107 }
108 if (pluginJars.length() == 0)
109 {
110 _empty = true;
111 return;
112 }
113
114 configMap.put(FelixConstants.AUTO_START_PROP + ".1", pluginJars.toString());
115 configMap.put(BundleCache.CACHE_PROFILE_DIR_PROP, plugindir);
116
117 List<BundleActivator> activators = new ArrayList<BundleActivator>();
118 _activator = new Activator();
119 activators.add(_activator);
120
121 _felix = new Felix(configMap, activators);
122 try
123 {
124 _felix.start();
125
126 _exchangeTracker = new ServiceTracker(_activator.getContext(), ExchangeType.class.getName(), null);
127 _exchangeTracker.open();
128
129 _securityTracker = new ServiceTracker(_activator.getContext(), ACLPlugin.class.getName(), null);
130 _exchangeTracker.open();
131
132 }
133 catch (BundleException e)
134 {
135 throw new Exception("Could not create bundle");
136 }
137 }
138
139 private <type> Map<String, type> getServices(ServiceTracker tracker)
140 {
141 Map<String, type>exchanges = new HashMap<String, type>();
142
143 if (tracker != null)
144 {
145 for (Object service : tracker.getServices())
146 {
147 exchanges.put(service.getClass().getName(), (type) service);
148 }
149 }
150
151 return exchanges;
152 }
153
154 public Map<String, ExchangeType<?>> getExchanges()
155 {
156 return getServices(_exchangeTracker);
157 }
158
159 public Map<String, ACLPluginFactory> getSecurityPlugins()
160 {
161 if (_securityPlugins == null)
162 {
163 _securityPlugins = getServices(_securityTracker);
164 // A little gross that we have to add them here, but not all the plugins are OSGIfied
165 _securityPlugins.put(SimpleXML.class.getName(), SimpleXML.FACTORY);
166 _securityPlugins.put(AllowAll.class.getName(), AllowAll.FACTORY);
167 _securityPlugins.put(DenyAll.class.getName(), DenyAll.FACTORY);
168 }
169 return _securityPlugins;
170 }
171
172 }
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