import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
-import javax.jms.MessageProducer;
-import javax.jms.Session;
-import javax.jms.TextMessage;
+import javax.jms.MessageListener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.argeo.slc.core.runtime.AbstractAgent;
import org.argeo.slc.execution.ExecutionModule;
import org.argeo.slc.execution.ExecutionModuleDescriptor;
+import org.argeo.slc.msg.ExecutionAnswer;
+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.listener.SessionAwareMessageListener;
-import org.springframework.jms.support.converter.MessageConversionException;
+import org.springframework.jms.core.MessagePostProcessor;
/** JMS based implementation of SLC Agent. */
public class JmsAgent extends AbstractAgent implements SlcAgent,
- InitializingBean, DisposableBean, SessionAwareMessageListener {
+ 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);
private final SlcAgentDescriptor agentDescriptor;
- // private ConnectionFactory connectionFactory;
private JmsTemplate jmsTemplate;
private Destination agentRegister;
private Destination agentUnregister;
- // private Destination requestDestination;
private Destination responseDestination;
- // private MessageConverter messageConverter;
-
public JmsAgent() {
try {
agentDescriptor = new SlcAgentDescriptor();
}
public void afterPropertiesSet() throws Exception {
- // Initialize JMS Template
- // jmsTemplate = new JmsTemplate(connectionFactory);
- // jmsTemplate.setMessageConverter(messageConverter);
-
- 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 void onMessage(Message message, Session session) throws JMSException {
- MessageProducer producer = session.createProducer(responseDestination);
- String query = message.getStringProperty(PROPERTY_QUERY);
- String correlationId = message.getJMSCorrelationID();
- if (log.isDebugEnabled())
- log.debug("Received query " + query + " with correlationId "
- + correlationId);
-
- Message responseMsg = null;
- if ("getExecutionModuleDescriptor".equals(query)) {
- String moduleName = message.getStringProperty("moduleName");
- String version = message.getStringProperty("version");
- ExecutionModuleDescriptor emd = getExecutionModuleDescriptor(
- moduleName, version);
- responseMsg = jmsTemplate.getMessageConverter().toMessage(emd,
- session);
- } else if ("listExecutionModuleDescriptors".equals(query)) {
-
- List<ExecutionModuleDescriptor> lst = listExecutionModuleDescriptors();
- SlcAgentDescriptor agentDescriptorToSend = new SlcAgentDescriptor(
- agentDescriptor);
- agentDescriptorToSend.setModuleDescriptors(lst);
- responseMsg = jmsTemplate.getMessageConverter().toMessage(
- agentDescriptorToSend, session);
- } else if ("newExecution".equals(query)) {
-
- SlcExecution slcExecution = (SlcExecution) jmsTemplate
- .getMessageConverter().fromMessage(message);
- runSlcExecution(slcExecution);
- return;
- } else {
- // try {
- // // FIXME: generalize
- // SlcExecution slcExecution = (SlcExecution) jmsTemplate
- // .getMessageConverter().fromMessage(message);
- // runSlcExecution(slcExecution);
- // } catch (MessageConversionException e) {
- // if (log.isDebugEnabled())
- // log.debug("Unsupported query " + query, e);
- // }
- if (log.isDebugEnabled())
- log.debug("Unsupported query " + query);
- return;
- }
-
- if (responseMsg != null) {
- responseMsg.setJMSCorrelationID(correlationId);
- producer.send(responseMsg);
- if (log.isDebugEnabled())
- log.debug("Sent response to query " + query
- + " with correlationId " + correlationId + ": "
- + responseMsg);
- }
-
- }
-
public ExecutionModuleDescriptor getExecutionModuleDescriptor(
String moduleName, String version) {
return getModulesManager().getExecutionModuleDescriptor(moduleName,
return descriptors;
}
+ public boolean ping() {
+ return true;
+ }
+
+ public void onMessage(final Message message) {
+ final String query;
+ final String correlationId;
+ try {
+ query = message.getStringProperty(PROPERTY_QUERY);
+ correlationId = message.getJMSCorrelationID();
+ } catch (JMSException e1) {
+ throw new SlcException("Cannot analyze incoming message " + message);
+ }
+
+ 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;
+ }
+ } 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(AbstractAgent.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 */
+ public Object process(String query, Message message) {
+ try {
+ if ("getExecutionModuleDescriptor".equals(query)) {
+ String moduleName = message.getStringProperty("moduleName");
+ String version = message.getStringProperty("version");
+ return getExecutionModuleDescriptor(moduleName, version);
+ } else if ("listExecutionModuleDescriptors".equals(query)) {
+
+ List<ExecutionModuleDescriptor> lst = listExecutionModuleDescriptors();
+ SlcAgentDescriptor agentDescriptorToSend = new SlcAgentDescriptor(
+ agentDescriptor);
+ agentDescriptorToSend.setModuleDescriptors(lst);
+ return agentDescriptorToSend;
+ } else if ("runSlcExecution".equals(query)) {
+ 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)) {
+ return ExecutionAnswer.ok("Agent " + agentDescriptor.getUuid()
+ + " is alive.");
+ } else {
+ throw new SlcException("Unsupported query " + query);
+ }
+ } catch (Exception e) {
+ log.error("Processing of query " + query + " failed", e);
+ return ExecutionAnswer.error(e);
+ }
+ }
+
+ 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) {
this.responseDestination = responseDestination;
}
projects / gpl / argeo-slc.git / blobdiff