001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.management;
018
019 import java.util.ArrayList;
020 import java.util.Collection;
021 import java.util.HashMap;
022 import java.util.List;
023 import java.util.Map;
024
025 import javax.management.JMException;
026 import javax.management.MalformedObjectNameException;
027 import javax.management.ObjectName;
028
029 import org.apache.camel.CamelContext;
030 import org.apache.camel.Endpoint;
031 import org.apache.camel.Exchange;
032 import org.apache.camel.Route;
033 import org.apache.camel.Service;
034 import org.apache.camel.impl.DefaultCamelContext;
035 import org.apache.camel.impl.ServiceSupport;
036 import org.apache.camel.model.ExceptionType;
037 import org.apache.camel.model.ProcessorType;
038 import org.apache.camel.model.RouteType;
039 import org.apache.camel.spi.InstrumentationAgent;
040 import org.apache.camel.spi.LifecycleStrategy;
041 import org.apache.camel.spi.RouteContext;
042 import org.apache.commons.logging.Log;
043 import org.apache.commons.logging.LogFactory;
044
045 /**
046 * JMX agent that registeres Camel lifecycle events in JMX.
047 *
048 * @version $Revision: 47144 $
049 */
050 public class InstrumentationLifecycleStrategy implements LifecycleStrategy {
051 private static final transient Log LOG = LogFactory.getLog(InstrumentationProcessor.class);
052
053 private InstrumentationAgent agent;
054 private CamelNamingStrategy namingStrategy;
055 private boolean initialized;
056
057 // A map (Endpoint -> InstrumentationProcessor) to facilitate
058 // adding per-route interceptor and registering ManagedRoute MBean
059 private Map<Endpoint, InstrumentationProcessor> interceptorMap =
060 new HashMap<Endpoint, InstrumentationProcessor>();
061
062 public InstrumentationLifecycleStrategy() {
063 this(new DefaultInstrumentationAgent());
064 }
065
066 public InstrumentationLifecycleStrategy(InstrumentationAgent agent) {
067 this.agent = agent;
068 }
069 /**
070 * Constructor for camel context that has been started.
071 *
072 * @param agent the agent
073 * @param context the camel context
074 */
075 public InstrumentationLifecycleStrategy(InstrumentationAgent agent, CamelContext context) {
076 this.agent = agent;
077 onContextStart(context);
078 }
079
080 public void onContextStart(CamelContext context) {
081 if (context instanceof DefaultCamelContext) {
082 try {
083 initialized = true;
084 DefaultCamelContext dc = (DefaultCamelContext)context;
085 // call addService so that context will start and stop the agent
086 dc.addService(agent);
087 namingStrategy = new CamelNamingStrategy(agent.getMBeanObjectDomainName());
088 ManagedService ms = new ManagedService(dc);
089 agent.register(ms, getNamingStrategy().getObjectName(dc));
090 } catch (Exception e) {
091 LOG.warn("Could not register CamelContext MBean", e);
092 }
093 }
094 }
095
096 public void onEndpointAdd(Endpoint<? extends Exchange> endpoint) {
097 // the agent hasn't been started
098 if (!initialized) {
099 return;
100 }
101
102 try {
103 ManagedEndpoint me = new ManagedEndpoint(endpoint);
104 agent.register(me, getNamingStrategy().getObjectName(me));
105 } catch (JMException e) {
106 LOG.warn("Could not register Endpoint MBean", e);
107 }
108 }
109
110 public void onRoutesAdd(Collection<Route> routes) {
111 // the agent hasn't been started
112 if (!initialized) {
113 return;
114 }
115
116 for (Route route : routes) {
117 try {
118 ManagedRoute mr = new ManagedRoute(route);
119 // retrieve the per-route intercept for this route
120 InstrumentationProcessor interceptor = interceptorMap.get(route.getEndpoint());
121 if (interceptor == null) {
122 LOG.warn("Instrumentation processor not found for route endpoint "
123 + route.getEndpoint());
124 } else {
125 interceptor.setCounter(mr);
126 }
127 agent.register(mr, getNamingStrategy().getObjectName(mr));
128 } catch (JMException e) {
129 LOG.warn("Could not register Route MBean", e);
130 }
131 }
132 }
133
134 public void onServiceAdd(CamelContext context, Service service) {
135 // the agent hasn't been started
136 if (!initialized) {
137 return;
138 }
139 if (service instanceof ServiceSupport) {
140 try {
141 ManagedService ms = new ManagedService((ServiceSupport)service);
142 agent.register(ms, getNamingStrategy().getObjectName(context, ms));
143 } catch (JMException e) {
144 LOG.warn("Could not register Service MBean", e);
145 }
146 }
147 }
148
149 public void onRouteContextCreate(RouteContext routeContext) {
150 // the agent hasn't been started
151 if (!initialized) {
152 return;
153 }
154
155 // Create a map (ProcessorType -> PerformanceCounter)
156 // to be passed to InstrumentationInterceptStrategy.
157 Map<ProcessorType, PerformanceCounter> counterMap =
158 new HashMap<ProcessorType, PerformanceCounter>();
159
160 // Each processor in a route will have its own performance counter
161 // The performance counter are MBeans that we register with MBeanServer.
162 // These performance counter will be embedded
163 // to InstrumentationProcessor and wrap the appropriate processor
164 // by InstrumentationInterceptStrategy.
165 RouteType route = routeContext.getRoute();
166
167 for (ProcessorType processor : route.getOutputs()) {
168 ObjectName name = null;
169 try {
170 // get the mbean name
171 name = getNamingStrategy().getObjectName(routeContext, processor);
172
173 // register mbean wrapped in the performance counter mbean
174 PerformanceCounter pc = new PerformanceCounter();
175 agent.register(pc, name);
176
177 // add to map now that it has been registered
178 counterMap.put(processor, pc);
179 } catch (MalformedObjectNameException e) {
180 LOG.warn("Could not create MBean name: " + name, e);
181 } catch (JMException e) {
182 LOG.warn("Could not register PerformanceCounter MBean: " + name, e);
183 }
184 }
185
186 routeContext.addInterceptStrategy(new InstrumentationInterceptStrategy(counterMap));
187
188 routeContext.setErrorHandlerWrappingStrategy(
189 new InstrumentationErrorHandlerWrappingStrategy(counterMap));
190
191 // Add an InstrumentationProcessor at the beginning of each route and
192 // set up the interceptorMap for onRoutesAdd() method to register the
193 // ManagedRoute MBeans.
194
195 RouteType routeType = routeContext.getRoute();
196 if (routeType.getInputs() != null && !routeType.getInputs().isEmpty()) {
197 if (routeType.getInputs().size() > 1) {
198 LOG.warn("Add InstrumentationProcessor to first input only.");
199 }
200
201 Endpoint endpoint = routeType.getInputs().get(0).getEndpoint();
202
203 List<ProcessorType<?>> exceptionHandlers = new ArrayList<ProcessorType<?>>();
204 List<ProcessorType<?>> outputs = new ArrayList<ProcessorType<?>>();
205
206 // separate out the exception handers in the outputs
207 for (ProcessorType output : routeType.getOutputs()) {
208 if (output instanceof ExceptionType) {
209 exceptionHandlers.add(output);
210 } else {
211 outputs.add(output);
212 }
213 }
214
215 // clearing the outputs
216 routeType.clearOutput();
217
218 // add exception handlers as top children
219 routeType.getOutputs().addAll(exceptionHandlers);
220
221 // add an interceptor
222 InstrumentationProcessor processor = new InstrumentationProcessor();
223 routeType.intercept(processor);
224
225 // add the output
226 for (ProcessorType<?> processorType : outputs) {
227 routeType.addOutput(processorType);
228 }
229
230 interceptorMap.put(endpoint, processor);
231 }
232
233 }
234
235 public CamelNamingStrategy getNamingStrategy() {
236 return namingStrategy;
237 }
238
239 public void setNamingStrategy(CamelNamingStrategy strategy) {
240 this.namingStrategy = strategy;
241 }
242
243 public void setAgent(InstrumentationAgent agent) {
244 this.agent = agent;
245 }
246
247 }