private int getState(ObjectName name) {
int status = -1;
if (name != null) {
try {
status = (Integer) server.getAttribute(name, "State");
} catch (Exception e) {
log.warn("getState", e);
}
}
return status;
}
private boolean isModified(ObjectName name) {
boolean modified = false;
if (name != null) {
try {
modified = (Boolean) server.getAttribute(name, "Modified");
} catch (Exception e) {
// Okay to fail
}
}
return modified;
}
private long persist(File f, ObjectName name) {
long deployed = f.lastModified();
try {
Element e = (Element) server.getAttribute(name, "Persist");
if (e != null) {
XMLOutputter out = new XMLOutputter(Format.getPrettyFormat());
Document doc = new Document();
e.detach();
doc.setRootElement(e);
File tmp = new File(f.getAbsolutePath() + ".tmp");
FileWriter writer = new FileWriter(tmp);
out.output(doc, writer);
writer.close();
f.delete();
tmp.renameTo(f);
deployed = f.lastModified();
}
} catch (Exception ex) {
log.warn("persist", ex);
}
return deployed;
}
public void run() {
started = true;
Thread.currentThread().setName("Q2-" + getInstanceId().toString());
try {
/*
* The following code determines whether a MBeanServer exists
* already. If so then the first one in the list is used.
* I have not yet find a way to interrogate the server for
* information other than MBeans so to pick a specific one
* would be difficult.
*/
ArrayList mbeanServerList = MBeanServerFactory.findMBeanServer(null);
if (mbeanServerList.isEmpty()) {
server = MBeanServerFactory.createMBeanServer(JMX_NAME);
} else {
server = (MBeanServer) mbeanServerList.get(0);
}
final ObjectName loaderName = new ObjectName(Q2_CLASS_LOADER);
try {
loader =
(QClassLoader)
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object run() {
return new QClassLoader(server, libDir, loaderName, mainClassLoader);
}
});
server.registerMBean(loader, loaderName);
loader = loader.scan(false);
} catch (Throwable t) {
if (log != null) log.error("initial-scan", t);
else t.printStackTrace();
}
factory = new QFactory(loaderName, this);
initSystemLogger();
addShutdownHook();
q2Thread = Thread.currentThread();
q2Thread.setContextClassLoader(loader);
if (cli != null) cli.start();
initConfigDecorator();
for (int i = 1; !shutdown; i++) {
try {
boolean forceNewClassLoader = scan();
QClassLoader oldClassLoader = loader;
loader = loader.scan(forceNewClassLoader);
if (loader != oldClassLoader) {
oldClassLoader = null; // We want't this to be null so it gets GCed.
System.gc(); // force a GC
log.info(
"new classloader ["
+ Integer.toString(loader.hashCode(), 16)
+ "] has been created");
}
deploy();
checkModified();
relax(SCAN_INTERVAL);
if (i % (3600000 / SCAN_INTERVAL) == 0) logVersion();
} catch (Throwable t) {
log.error("start", t);
relax();
}
}
undeploy();
try {
server.unregisterMBean(loaderName);
} catch (InstanceNotFoundException e) {
log.error(e);
}
if (decorator != null) {
decorator.uninitialize();
}
if (exit && !shuttingDown) System.exit(0);
} catch (Exception e) {
if (log != null) log.error(e);
else e.printStackTrace();
System.exit(1);
}
}
