/**
* Create and initialize a pool of threads to serve clients requests.
*
* @param routingTable the Routing Table used to find WS.
*/
public PoolClientConnection(RoutingTable routingTable) {
super();
PoolClientConnection.routingTable = routingTable;
PoolClientConnection.mailBox = new MailBoxImpl();
// Pool creation and initialisation
// Max threads
int sizeMax = Integer.parseInt(DispatcherMSG.CONFIGURATION.getProperty("clients.max"));
pool = new PooledExecutor(sizeMax);
// Min threads
int sizeMin = Integer.parseInt(DispatcherMSG.CONFIGURATION.getProperty("clients.min"));
pool.setMinimumPoolSize(sizeMin);
// Keep alive time
long keepAliveTime =
Long.parseLong(DispatcherMSG.CONFIGURATION.getProperty("clients.keepAliveTime"));
pool.setKeepAliveTime(keepAliveTime);
// Pre-start threads
int preCreateThread =
Integer.parseInt(DispatcherMSG.CONFIGURATION.getProperty("clients.preCreateThreads"));
pool.createThreads(preCreateThread);
// Set the policy for blocked execution to be to wait until a thread is
// available
pool.waitWhenBlocked();
}
/**
* Default Constructor.
*
* @param instRep The WorkflowInstanceRepository to be used by this engine.
* @param queueSize The size of the queue that the workflow engine should use (irrelevant if
* unlimitedQueue is set to true)
* @param maxPoolSize The minimum thread pool size.
* @param minPoolSize The maximum thread pool size.
* @param threadKeepAliveTime The amount of minutes that each thread in the pool should be kept
* alive.
* @param unlimitedQueue Whether or not to use a queue whose bounds are dictated by the physical
* memory of the underlying hardware.
* @param resUrl A URL pointer to a resource manager. If this is set Tasks will be wrapped as
* Resource Manager {@link Job}s and sent through the Resource Manager. If this parameter is
* not set, local execution (the default) will be used
*/
public ThreadPoolWorkflowEngine(
WorkflowInstanceRepository instRep,
int queueSize,
int maxPoolSize,
int minPoolSize,
long threadKeepAliveTime,
boolean unlimitedQueue,
URL resUrl) {
this.instRep = instRep;
Channel c = null;
if (unlimitedQueue) {
c = new LinkedQueue();
} else {
c = new BoundedBuffer(queueSize);
}
pool = new PooledExecutor(c, maxPoolSize);
pool.setMinimumPoolSize(minPoolSize);
pool.setKeepAliveTime(1000 * 60 * threadKeepAliveTime);
workerMap = new HashMap();
if (resUrl != null) rClient = new XmlRpcResourceManagerClient(resUrl);
}
static {
JSONObject json =
JSONObject.fromObject(PropertiesDeploy.getConfigureMap().get(Constant.OTHERS_HOST_NAME));
othersPooledExecutor.setKeepAliveTime(
Integer.parseInt(json.getString(Constant.KEEP_ALIVE_TIME)));
othersPooledExecutor.createThreads(Integer.parseInt(json.getString(Constant.CREATE_SIZE)));
othersPooledExecutor.setMinimumPoolSize(
Integer.parseInt(json.getString(Constant.MIN_POOL_SIZE)));
othersPooledExecutor.setMaximumPoolSize(
Integer.parseInt(json.getString(Constant.MAX_POOL_SIZE)));
othersPooledExecutor.abortWhenBlocked();
}
public void onApplicationEvent(ApplicationEvent event) {
try {
threadPool.execute(new Worker(event));
} catch (InterruptedException e) {
logger.error("Failed to process event: " + event.toString(), e);
}
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.WorkflowEngine#startWorkflow(org.apache.oodt.cas.workflow.structs.Workflow,
* org.apache.oodt.cas.metadata.Metadata)
*/
public synchronized WorkflowInstance startWorkflow(Workflow workflow, Metadata metadata)
throws EngineException {
// to start the workflow, we create a default workflow instance
// populate it
// persist it
// add it to the worker map
// start it
WorkflowInstance wInst = new WorkflowInstance();
wInst.setWorkflow(workflow);
wInst.setCurrentTaskId(((WorkflowTask) workflow.getTasks().get(0)).getTaskId());
wInst.setSharedContext(metadata);
wInst.setStatus(CREATED);
persistWorkflowInstance(wInst);
IterativeWorkflowProcessorThread worker =
new IterativeWorkflowProcessorThread(wInst, instRep, this.wmgrUrl);
worker.setRClient(rClient);
workerMap.put(wInst.getId(), worker);
wInst.setStatus(QUEUED);
persistWorkflowInstance(wInst);
try {
pool.execute(worker);
} catch (InterruptedException e) {
throw new EngineException(e);
}
return wInst;
}
/**
* Check, parse, verify the <code>req</code>. Attribute a client thread to serve the client.
*
* @see xsul.http_server.HttpMiniServlet#service(xsul.http_server.HttpServerRequest,
* xsul.http_server.HttpServerResponse)
*/
public void service(HttpServerRequest req, HttpServerResponse resp) throws HttpServerException {
// Thread allocation for the new client
try {
XmlElement el = builder.parseFragmentFromInputStream(req.getInputStream());
// FIXME XmlElement el =
// builder.parseFragmentFromInputStream(req.getInputStream(),
// req.getCharset());
SoapUtil soapUtil = SoapUtil.selectSoapFragrance(el, soapFragrances);
String path = req.getPath();
// Path Treatment to get arguments
String arguments = null;
if (path != null) {
// Analysiing path
if (path.startsWith("/")) {
path = path.substring(1);
}
String method = req.getMethod();
if (method.equals("GET")) {
// Remove arguments from path
int argStart = path.indexOf('?');
if (argStart != -1) {
// There are some arguments
arguments = path.substring(argStart, path.length());
path = path.replaceAll("\\?.*", "");
}
}
}
ClientConnection client = new ClientConnection(path, arguments, el, soapUtil);
pool.execute(
client); // NOTE: pool will now "execute" client (the sentence may be delayed ...)
// Successful HTTP message transmission
// Send Ok to the client
this.sendHttpOk(resp);
} catch (Exception e) {
SendError.send(resp, "500", "Thread Interrupted Exception");
logger.warning("Couldn't allocate a thread to the client", e);
}
}
@Override
public void shutdown() {
othersPooledExecutor.shutdownAfterProcessingCurrentlyQueuedTasks();
othersPooledExecutor = null;
}
@Override
public int getThreadSize() {
return othersPooledExecutor.getPoolSize();
}
@Override
public void execute(Runnable r) throws InterruptedException {
othersPooledExecutor.execute(r);
}