public void start() {
_mngmtLock.writeLock().lock();
try {
if (!checkState(State.INIT, State.RUNNING)) {
__log.debug("start() ignored -- already started");
return;
}
__log.debug("BPEL SERVER starting.");
// Eventually running some migrations before starting
if (!(new MigrationHandler(_contexts)
.migrate(_registeredProcesses, _migrationTransactionTimeout))) {
throw new BpelEngineException(
"An error occurred while migrating your database to a newer version of the server. Please make sure that the required migration scripts have been executed before starting the server.");
}
_state = State.RUNNING;
__log.info(__msgs.msgServerStarted());
if (_dehydrationPolicy != null) {
processDefReaper = new Thread(new ProcessDefReaper(), "Dehydrator");
processDefReaper.setDaemon(true);
processDefReaper.start();
}
} finally {
_mngmtLock.writeLock().unlock();
}
}
public void run() {
__log.debug("Starting process definition reaper thread.");
long pollingTime = 10000;
try {
while (true) {
Thread.sleep(pollingTime);
if (!_mngmtLock.writeLock().tryLock(100L, TimeUnit.MILLISECONDS)) continue;
try {
__log.debug("Kicking reaper, OProcess instances: " + OProcess.instanceCount);
// Copying the runnning process list to avoid synchronization
// problems and a potential mess if a policy modifies the list
List<BpelProcess> candidates = new ArrayList<BpelProcess>(_registeredProcesses);
CollectionsX.remove_if(
candidates,
new MemberOfFunction<BpelProcess>() {
public boolean isMember(BpelProcess o) {
return !o.hintIsHydrated();
}
});
// And the happy winners are...
List<BpelProcess> ripped = _dehydrationPolicy.markForDehydration(candidates);
// Bye bye
for (BpelProcess process : ripped) {
__log.debug("Dehydrating process " + process.getPID());
process.dehydrate();
}
} finally {
_mngmtLock.writeLock().unlock();
}
}
} catch (InterruptedException e) {
__log.debug(e);
}
}
public void register(ProcessConf conf) {
if (conf == null)
throw new NullPointerException("must specify non-null process configuration.");
__log.debug("register: " + conf.getProcessId());
// Ok, IO out of the way, we will mod the server state, so need to get a
// lock.
try {
_mngmtLock.writeLock().lockInterruptibly();
} catch (InterruptedException ie) {
__log.debug("register(...) interrupted.", ie);
throw new BpelEngineException(__msgs.msgOperationInterrupted());
}
try {
// If the process is already active, do nothing.
if (_engine.isProcessRegistered(conf.getProcessId())) {
__log.debug(
"skipping doRegister" + conf.getProcessId() + ") -- process is already registered");
return;
}
__log.debug("Registering process " + conf.getProcessId() + " with server.");
BpelProcess process = createBpelProcess(conf);
process._classLoader = Thread.currentThread().getContextClassLoader();
_engine.registerProcess(process);
_registeredProcesses.add(process);
if (!isLazyHydratable(process)) {
process.hydrate();
} else {
_engine.setProcessSize(process.getPID(), false);
}
__log.info(__msgs.msgProcessRegistered(conf.getProcessId()));
} catch (Exception ex) {
__log.error(ex);
throw new BpelEngineException(ex);
} finally {
_mngmtLock.writeLock().unlock();
}
}
public void stop() {
_mngmtLock.writeLock().lock();
try {
if (!checkState(State.RUNNING, State.INIT)) {
__log.debug("stop() ignored -- already stopped");
return;
}
__log.debug("BPEL SERVER STOPPING");
if (processDefReaper != null) {
processDefReaper.interrupt();
processDefReaper = null;
}
_contexts.scheduler.stop();
_engine = null;
_state = State.INIT;
__log.info(__msgs.msgServerStopped());
} finally {
_mngmtLock.writeLock().unlock();
}
}
public Thread newThread(Runnable r) {
threadNumber += 1;
Thread t = new Thread(r, "ProcessStoreImpl-" + threadNumber);
t.setDaemon(true);
return t;
}