/**
* Perform asynchronous remote call via future.
*
* <p>With ECF >=3.3 remote services, when a proxy is created, if an interface class with the name
* [fq service interface name]Async can be loaded and it extends IAsyncRemoteServiceProxy then the
* proxy will implement that interface.
*
* @param svcproxy
*/
private void asyncInvokeSvcFuture(IHello svcproxy) {
// Provided that the IHelloAsync interface was available during proxy
// creation, the created service proxy shall implement it.
if (svcproxy instanceof IHelloAsync) {
System.out.println("ENTERED ASYNCHRONOUS REMOTE CALL VIA FUTURE");
IHelloAsync helloAsync = (IHelloAsync) svcproxy;
// Call asynchronously with future
System.out.println("Initiating invocation of remote call via future...");
IFuture helloAsyncFuture =
helloAsync.helloAsync(CLASSNAME + " using an asynchronous remote call via future.");
System.out.println("Completed invocation of remote call via future." + "\n");
try {
while (!helloAsyncFuture.isDone()) {
// Dummy blocking to demonstrate client executing background
// logic while waiting for service response
System.out.println("Waiting for remote service response via future...");
sleep();
}
// Once the remote service has replied the future is filled and
// the
// response shall be processed
Object response = helloAsyncFuture.get();
System.out.println(
"Successfully received remote service response via future: " + response + "\n");
} catch (OperationCanceledException e) {
System.out.println(
"Received operation cancel in remote service response via future: " + e + "\n");
e.printStackTrace();
} catch (InterruptedException e) {
System.out.println(
"Interrupted operation in remote service response via future: " + e + "\n");
e.printStackTrace();
}
System.out.println("EXITING ASYNCHRONOUS REMOTE CALL VIA FUTURE" + "\n");
} else {
System.err.println("ASYNCHRONOUS REMOTE CALL VIA FUTURE NOT EXECUTED" + "\n");
}
}
/**
* Perform asynchronous remote call via Future derived from proxy.
*
* <p>Non-blocking remote service invocation storing the result inside a Future placeholder.
*
* @param remotesvc
*/
private void asyncInvokeRemoteSvc(IHello svcproxy) {
System.out.println("ENTERED REMOTE CALL VIA FUTURE");
IRemoteService remotesvc;
try {
// Retrieve the remote service instance from the proxy
remotesvc = ((IRemoteServiceProxy) svcproxy).getRemoteService();
} catch (Exception e) {
e.printStackTrace();
System.err.println(
"EXITING REMOTE CALL VIA FUTURE DUE TO EXCEPTION UPON CREATION OF IRemoteService" + "\n");
return;
}
System.out.println("Initiating invocation of remote call via future...");
IFuture remotesvcFuture =
RemoteServiceHelper.futureExec(
remotesvc,
"hello",
new Object[] {CLASSNAME + " using an asynchronous remote call via future."});
System.out.println(
"Completed invocation of remote call via future. Check service host for details." + "\n");
try {
while (!remotesvcFuture.isDone()) {
// Dummy blocking to demonstrate client executing background
// logic while waiting for service response
System.out.println("Waiting for remote service response via future...");
sleep();
}
// Once the remote service has replied the future is filled and the
// response shall be processed
Object response = remotesvcFuture.get();
System.out.println(
"Successfully received remote service response via future: " + response + "\n");
} catch (Exception e) {
e.printStackTrace();
System.err.println("EXITING REMOTE CALL VIA FUTURE DUE TO EXCEPTION" + "\n");
}
System.out.println("EXITING REMOTE CALL VIA FUTURE" + "\n");
}
private void refreshInput() {
if (service != null) {
try {
if (service instanceof IKundenServiceAsync) {
final IKundenServiceAsync serviceAsync = (IKundenServiceAsync) service;
final IFuture kunden = serviceAsync.listKundenAsync();
try {
// do something else here before kunden gets used
// doSomeHeavyComputation();
if (kunden.isDone()) {
setInput((Kunde[]) kunden.get());
}
// do again something else first
// doAnotherHeavyComputation();
if (kunden.isDone()) {
setInput((Kunde[]) kunden.get());
}
// finally wait for 1000ms to set the input and fail otherwise
setInput((Kunde[]) kunden.get(1000));
} catch (OperationCanceledException e) {
// TODO handle e somehow, but how?
e.printStackTrace();
} catch (InterruptedException e) {
// TODO handle e somehow, but how?
e.printStackTrace();
} catch (TimeoutException e) {
// TODO handle e somehow, but how?
e.printStackTrace();
}
} else {
setInput(service.listKunden());
}
} catch (ServiceException e) {
e.printStackTrace();
}
} else {
setInput(new Kunde[0]);
}
}
