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| <h2 title="Interface ManagedThreadFactory" class="title">Interface ManagedThreadFactory</h2> |
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| <pre>public interface <span class="typeNameLabel">ManagedThreadFactory</span> |
| extends java.util.concurrent.ThreadFactory</pre> |
| <div class="block">A manageable version of a <CODE>ThreadFactory</CODE>.<p> |
| |
| A ManagedThreadFactory extends the Java™ SE ThreadFactory to provide |
| a method for creating threads for execution in a Jakarta™ EE environment. |
| Implementations of the ManagedThreadFactory are |
| provided by a Jakarta EE Product Provider. Application Component Providers |
| use the Java Naming and Directory Interface™ (JNDI) to look-up instances of one |
| or more ManagedThreadFactory objects using resource environment references.<p> |
| |
| The Jakarta Concurrency specification describes several |
| behaviors that a ManagedThreadFactory can implement. The Application |
| Component Provider and Deployer identify these requirements and map the |
| resource environment reference appropriately.<p> |
| |
| Threads returned from the <code>newThread()</code> method should implement the |
| <a href="../../../javax/enterprise/concurrent/ManageableThread.html" title="interface in javax.enterprise.concurrent"><code>ManageableThread</code></a> interface. |
| |
| The Runnable task that is allocated to the new thread using the |
| <code>ThreadFactory.newThread(Runnable)</code> method |
| will run with the application component context of the component instance |
| that created (looked-up) this ManagedThreadFactory instance.<p> |
| |
| The task runs without an explicit transaction (they do not enlist in the application |
| component's transaction). If a transaction is required, use a |
| <CODE>javax.transaction.UserTransaction</CODE> instance. A UserTransaction instance is |
| available in JNDI using the name: "java:comp/UserTransaction"<p> |
| |
| Example: |
| <pre> |
| public run() { |
| // Begin of task |
| InitialContext ctx = new InitialContext(); |
| UserTransaction ut = (UserTransaction) ctx.lookup("java:comp/UserTransaction"); |
| ut.begin(); |
| |
| // Perform transactional business logic |
| |
| ut.commit(); |
| }</PRE> |
| |
| A ManagedThreadFactory can be used with Java SE ExecutorService implementations directly.<p> |
| |
| Example: |
| <pre> |
| /** |
| * Create a ThreadPoolExecutor using a ManagedThreadFactory. |
| * Resource Mappings: |
| * type: javax.enterprise.concurrent.ManagedThreadFactory |
| * jndi-name: concurrent/tf/DefaultThreadFactory |
| */ |
| |
| @Resource(name="concurrent/tf/DefaultThreadFactory") |
| ManagedThreadFactory tf; |
| |
| public ExecutorService getManagedThreadPool() { |
| |
| // All threads will run as part of this application component. |
| return new ThreadPoolExecutor(5, 10, 5, TimeUnit.SECONDS, |
| new ArrayBlockingQueue<Runnable>(10), tf); |
| } |
| </pre> |
| <P></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.0</dd> |
| <dt><span class="simpleTagLabel">Examples (en):</span></dt> |
| <dd><a href="../../../../../../tomee-8.0/examples/concurrency-utils.html">concurrency-utils</a></dd> |
| <dt><span class="simpleTagLabel">Examples (pt):</span></dt> |
| <dd><a href="../../../../../../tomee-8.0/pt/examples/concurrency-utils.html">concurrency-utils</a></dd> |
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| <h3>Methods inherited from interface java.util.concurrent.ThreadFactory</h3> |
| <code>newThread</code></li> |
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