/**
* Starts the plugin deployer which will effectively ask the plugin deployer to persist
* information about all detected agent and server plugins.
*
* <p>Because this will scan and register the initial plugins right now, make sure this is called
* prior to starting the master plugin container; otherwise, the master PC will not have any
* plugins to start.
*
* @throws RuntimeException
*/
private void startPluginDeployer() throws RuntimeException {
log.info("Starting the agent/server plugin deployer...");
try {
PluginDeploymentScannerMBean deployer = getPluginDeploymentScanner();
deployer.startDeployment();
} catch (Exception e) {
throw new RuntimeException("Cannot start the agent/server plugin deployer!", e);
}
}
@Timeout
// does AS7 EJB3 container allow this? We do not want a tx here!
@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
public void scanForPlugins(final Timer timer) {
try {
PluginDeploymentScannerMBean deployer = getPluginDeploymentScanner();
deployer.scanAndRegister();
} catch (Throwable t) {
log.error("Plugin scan failed. Cause: " + ThrowableUtil.getAllMessages(t));
if (log.isDebugEnabled()) {
log.debug("Plugin scan failure stack trace follows:", t);
}
}
}
public void unpreparePluginScannerService() throws Exception {
if (pluginScannerService != null) {
pluginScannerService.stop();
pluginScannerService = null;
}
MBeanServer mbs = getPlatformMBeanServer();
if (mbs.isRegistered(PluginDeploymentScannerMBean.OBJECT_NAME)) {
mbs.unregisterMBean(PluginDeploymentScannerMBean.OBJECT_NAME);
}
}
/**
* Creates the timer that will trigger periodic scans for new plugins.
*
* @throws RuntimeException
*/
private void registerPluginDeploymentScannerJob() throws RuntimeException {
log.info("Creating timer to begin scanning for plugins...");
try {
PluginDeploymentScannerMBean deployer = getPluginDeploymentScanner();
long scanPeriod = 5 * 60000L;
try {
String scanPeriodString = deployer.getScanPeriod();
scanPeriod = Long.parseLong(scanPeriodString);
} catch (Exception e) {
log.warn("could not determine plugin scanner scan period - using: " + scanPeriod, e);
}
// create a non-persistent periodic timer (we'll reset it ever startup) with the scan period
// as configured in our scanner object
timerService.createIntervalTimer(scanPeriod, scanPeriod, new TimerConfig(null, false));
} catch (Exception e) {
throw new RuntimeException(
"Cannot schedule plugin scanning timer - new plugins will not be detected!", e);
}
}
/**
* Note that the standard plugin scanner service is deployed automatically with the test rhq ear,
* this is only necessary if you want a custom service.
*
* @param scannerService
*/
public PluginDeploymentScannerMBean preparePluginScannerService(
PluginDeploymentScannerMBean scannerService) {
try {
MBeanServer mbs = getPlatformMBeanServer();
if (mbs.isRegistered(PluginDeploymentScannerMBean.OBJECT_NAME)) {
mbs.unregisterMBean(PluginDeploymentScannerMBean.OBJECT_NAME);
}
// Now replace with the test service...
mbs.registerMBean(scannerService, PluginDeploymentScannerMBean.OBJECT_NAME);
pluginScannerService = scannerService;
pluginScannerService.start();
return pluginScannerService;
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
