Exemple simple de mise en place d'une surveillance d'un service CMIS par une application "cliente"
Les beans Spring :
<bean id="cmisFileStorageService" class="org.esupportail.application.service.fileStorage.CmisFileStorageServiceImpl" lazy-init="true">
<description>A bean to manage files upload and download to the CMIS server.</description>
...
<property name="jmxTestCmis" ref="jmxTestCmis"/>
</bean>
<!-- JMX to control CMIS -->
<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter" >
<property name="beans">
<map>
<entry key="bean:name=testCmis" value-ref="jmxTestCmis"/>
</map>
</property>
</bean>
<bean id="jmxTestCmis"
class="org.esupportail.application.service.fileStorage.JmxTestCmisImpl">
...
</bean>
La classe métier cliente JMX
public class CmisFileStorageServiceImpl {
....
/**
* Bean to test if cmis is ready.
*/
private JmxTestCmis jmxTestCmis;
public void afterPropertiesSet() throws Exception {
....
Assert.notNull(this.jmxTestCmis,
"property jmxTestCmis of class " + this.getClass().getName() + " can not be null");
}
...
/**
* @param jmxTestCmis the jmxTestCmis to set
*/
public void setJmxTestCmis(final JmxTestCmis jmxTestCmis) {
this.jmxTestCmis = jmxTestCmis;
}
public FileStorage getFile(...) throws IOException {
FileStorage file = null;
if (jmxTestCmis.getCmisIsReady()) {
file= ...;
} else {
System.err.println("--------le service CMIS est indisponible");
}
return file;
}
}
Le bean JMX
package org.esupportail.application.services.fileStorage;
public interface JmxTestCmis {
/**
* Enable the use of CMIS.
*/
void enabledCmis();
/**
* Disable the use of CMIS.
*/
void disabledCmis();
/**
* @return the cmisIsReady
*/
Boolean getCmisIsReady();
}
package org.esupportail.application.services.fileStorage;
import java.io.Serializable;
public class JmxTestCmisImpl implements JmxTestCmis, Serializable {
/**
* True if cmis is ready.
* Default value = true.
*/
private Boolean cmisIsReady;
public JmxTestCmisImpl() {
super();
cmisIsReady = true;
}
@Override
public void disabledCmis() {
cmisIsReady = false;
}
@Override
public void enabledCmis() {
cmisIsReady = true;
}
public Boolean getCmisIsReady() {
return cmisIsReady;
}
}
L'activation de l'écoute JMX
L'application écoute le port jmx 9656 (par exemple)
Au lancement de l'application, on aura les options suivantes:
\-Dcom.sun.management.jmxremote \-Dcom.sun.management.jmxremote.port=9656 \-Dcom.sun.management.jmxremote.authenticate=false \-Dcom.sun.management.jmxremote.ssl=false
L'activation de la surveillence JMX
Application "surveillée" : activation/désactivation de la surveillance
activationJMX.sh
#!/bin/csh
set cmdLineJMXJar=/opt/admin-java/jmx/cmdline-jmxclient.jar
set jmxHost=host.etablissement.fr
set jmXPort=9656
#No User and password so pass '-'
echo "active l'utilisation de CMIS pour les applications en ecoute sur le port 9656"
/opt/jdk1.6.0/bin/java -jar ${cmdLineJMXJar} - ${jmxHost}:${port} bean:name=testCmis enabled
desactivationJMX.sh
#!/bin/csh
set cmdLineJMXJar=/opt/admin-java/jmx/cmdline-jmxclient.jar
set port=9656
set jmxHost=host.etablissement.fr
#No User and password so pass '-'
echo "désactive l'utilisation de CMIS pour les applications en ecoute sur le port 9656"
/opt/jdk1.6.0/bin/java -jar ${cmdLineJMXJar} - ${jmxHost}:${port} bean:name=testCmis disabled