Java Reference
In-Depth Information
ReportGeneratorTask());
String result =
monitor.get();
•
Managed scheduled executor service:
The
ManagedScheduledEx-
ecutorService
interface extends the
ManagedExecutorService
and
java.util.concurrent.ScheduledExecutorService
interfaces in
order to execute a task at a specific time.
• Instances of this interface are defined in the same way as that of the
ManagedExecutorService
interface. The following code demon-
strates how to execute a task ten seconds after its submission:
Future<String> monitor =
reportGenerator
.schedule(new
ReportGeneratorTask(),
10,TimeUnit.SECONDS);
•
Managed thread factory:
The
ManagedThreadFactory
interface
providesmethodtocreatemanagedthreadinstancesinacontainer.Thetask
must implement the
java.lang.Runnable
interface. The following code
demonstrates how to create and run a container-managed thread.
Thread myThread =
threadFactory.newThread(new
ReportManagedThread());
myThread.start();
•
Context service:
This interface allows the creation of contextual objects
without using
ManagedExecutorService
or
ManagedScheduledEx-
ecutorService
interfaces, as we did in the previous cases, with the aim
of allowing the extension of the capabilities of a Java EE platform for con-
currency. Concretely, with this interface, you can create a workflow system
or use customized Java SE platform
ExecutorService
implementations
within a container. For example, if you desire to use the pool management
mechanism provided by the class
java.util.concurrent.ThreadPoolExecutor
of Java SE to manage
