+/*
+ * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
package org.argeo.slc.jms;
import java.net.InetAddress;
import java.net.UnknownHostException;
-import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
-import javax.jms.TextMessage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.argeo.slc.SlcException;
-import org.argeo.slc.core.runtime.AbstractAgent;
-import org.argeo.slc.execution.ExecutionModule;
+import org.argeo.slc.core.runtime.DefaultAgent;
import org.argeo.slc.execution.ExecutionModuleDescriptor;
import org.argeo.slc.msg.ExecutionAnswer;
+import org.argeo.slc.msg.MsgConstants;
+import org.argeo.slc.msg.ReferenceList;
import org.argeo.slc.process.SlcExecution;
-import org.argeo.slc.runtime.SlcAgent;
import org.argeo.slc.runtime.SlcAgentDescriptor;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
+import org.springframework.jms.JmsException;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessagePostProcessor;
/** JMS based implementation of SLC Agent. */
-public class JmsAgent extends AbstractAgent implements SlcAgent,
- InitializingBean, DisposableBean, MessageListener {
+public class JmsAgent extends DefaultAgent implements InitializingBean,
+ DisposableBean, MessageListener {
public final static String PROPERTY_QUERY = "query";
- public final static String PROPERTY_SLC_AGENT_ID = "slc_agentId";
+ public final static String QUERY_PING_ALL = "pingAll";
private final static Log log = LogFactory.getLog(JmsAgent.class);
}
public void afterPropertiesSet() throws Exception {
- jmsTemplate.convertAndSend(agentRegister, agentDescriptor);
- log.info("Agent #" + agentDescriptor.getUuid() + " registered to "
- + agentRegister);
+ try {
+ jmsTemplate.convertAndSend(agentRegister, agentDescriptor);
+ log.info("Agent #" + agentDescriptor.getUuid() + " registered to "
+ + agentRegister);
+ } catch (JmsException e) {
+ log
+ .warn("Could not register agent "
+ + agentDescriptor.getUuid()
+ + " to server: "
+ + e.getMessage()
+ + ". The agent will stay offline but will keep listening for a ping all sent by server.");
+ if (log.isTraceEnabled())
+ log.debug("Original error.", e);
+ }
}
public void destroy() throws Exception {
- jmsTemplate.convertAndSend(agentUnregister, agentDescriptor);
- log.info("Agent #" + agentDescriptor.getUuid() + " unregistered from "
- + agentUnregister);
+ try {
+ jmsTemplate.convertAndSend(agentUnregister, agentDescriptor);
+ log.info("Agent #" + agentDescriptor.getUuid()
+ + " unregistered from " + agentUnregister);
+ } catch (JmsException e) {
+ log.warn("Could not unregister agent " + agentDescriptor.getUuid()
+ + ": " + e.getMessage());
+ if (log.isTraceEnabled())
+ log.debug("Original error.", e);
+ }
}
public void setAgentRegister(Destination agentRegister) {
return messageSelector;
}
- public ExecutionModuleDescriptor getExecutionModuleDescriptor(
- String moduleName, String version) {
- return getModulesManager().getExecutionModuleDescriptor(moduleName,
- version);
- }
-
- public List<ExecutionModuleDescriptor> listExecutionModuleDescriptors() {
- List<ExecutionModule> modules = getModulesManager()
- .listExecutionModules();
-
- List<ExecutionModuleDescriptor> descriptors = new ArrayList<ExecutionModuleDescriptor>();
- for (ExecutionModule module : modules) {
- ExecutionModuleDescriptor md = new ExecutionModuleDescriptor();
- md.setName(module.getName());
- md.setVersion(module.getVersion());
- descriptors.add(md);
- }
- return descriptors;
- }
-
- public boolean ping() {
- return true;
- }
-
public void onMessage(final Message message) {
final String query;
final String correlationId;
throw new SlcException("Cannot analyze incoming message " + message);
}
- final Object response = process(query, message);
-
- new Thread() {
- public void run() {
- // Send response
- jmsTemplate.convertAndSend(responseDestination, response,
- new MessagePostProcessor() {
- public Message postProcessMessage(
- Message messageToSend) throws JMSException {
- messageToSend
- .setStringProperty(
- PROPERTY_QUERY,
- message
- .getStringProperty(PROPERTY_QUERY));
- messageToSend.setStringProperty(
- PROPERTY_SLC_AGENT_ID, agentDescriptor
- .getUuid());
- messageToSend.setJMSCorrelationID(message
- .getJMSCorrelationID());
- return messageToSend;
- }
- });
- if (log.isDebugEnabled())
- log.debug("Sent response to query " + query
- + " with correlationId " + correlationId);
+ final Object response;
+ final Destination destinationSend;
+ if (QUERY_PING_ALL.equals(query)) {
+ ReferenceList refList = (ReferenceList) convertFrom(message);
+ if (!refList.getReferences().contains(agentDescriptor.getUuid())) {
+ response = agentDescriptor;
+ destinationSend = agentRegister;
+ log.info("Agent #" + agentDescriptor.getUuid()
+ + " registering to " + agentRegister
+ + " in reply to a " + QUERY_PING_ALL + " query");
+ } else {
+ return;
}
- }.start();
+ } else {
+ response = process(query, message);
+ destinationSend = responseDestination;
+ }
+ // Send response
+ jmsTemplate.convertAndSend(destinationSend, response,
+ new MessagePostProcessor() {
+ public Message postProcessMessage(Message messageToSend)
+ throws JMSException {
+ messageToSend.setStringProperty(PROPERTY_QUERY, query);
+ messageToSend.setStringProperty(
+ MsgConstants.PROPERTY_SLC_AGENT_ID,
+ agentDescriptor.getUuid());
+ messageToSend.setJMSCorrelationID(correlationId);
+ return messageToSend;
+ }
+ });
+ if (log.isTraceEnabled())
+ log.debug("Sent response to query '" + query
+ + "' with correlationId " + correlationId);
}
/** @return response */
agentDescriptorToSend.setModuleDescriptors(lst);
return agentDescriptorToSend;
} else if ("runSlcExecution".equals(query)) {
- SlcExecution slcExecution = (SlcExecution) convertFrom(message);
- runSlcExecution(slcExecution);
+ final SlcExecution slcExecution = (SlcExecution) convertFrom(message);
+ new Thread() {
+ public void run() {
+ runSlcExecution(slcExecution);
+ }
+ }.start();
return ExecutionAnswer.ok("Execution started on agent "
+ agentDescriptor.getUuid());
} else if ("ping".equals(query)) {
}
}
- protected Object convertFrom(Message message) throws JMSException {
- return jmsTemplate.getMessageConverter().fromMessage(message);
+ protected Object convertFrom(Message message) {
+ try {
+ return jmsTemplate.getMessageConverter().fromMessage(message);
+ } catch (JMSException e) {
+ throw new SlcException("Cannot convert message", e);
+ }
}
public void setResponseDestination(Destination responseDestination) {
projects / gpl / argeo-slc.git / blobdiff