[jboss-cvs] JBossAS SVN: r89688 - projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads.

[jboss-cvs-commits at lists.jboss.org]

Author: david.lloyd at jboss.com
Date: 2009-06-02 14:08:13 -0400 (Tue, 02 Jun 2009)
New Revision: 89688

Added:
   projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/ConfigurableExecutor.java
   projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/QueuelessThreadPoolExecutor.java
Modified:
   projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/JBossExecutors.java
Log:
Add a queueless thread pool executor

Added: projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/ConfigurableExecutor.java
===================================================================
--- projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/ConfigurableExecutor.java	                        (rev 0)
+++ projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/ConfigurableExecutor.java	2009-06-02 18:08:13 UTC (rev 89688)
@@ -0,0 +1,32 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2009, Red Hat Middleware LLC, and individual contributors
+ * as indicated by the @author tags. See the copyright.txt file in the
+ * distribution for a full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+
+package org.jboss.threads;
+
+import java.util.concurrent.Executor;
+
+/**
+ *
+ */
+public interface ConfigurableExecutor {
+    void execute(Runnable task, DirectExecutor taskExecutor, RejectionPolicy policy, Executor handoffExecutor);
+}

Modified: projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/JBossExecutors.java
===================================================================
--- projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/JBossExecutors.java	2009-06-02 17:47:17 UTC (rev 89687)
+++ projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/JBossExecutors.java	2009-06-02 18:08:13 UTC (rev 89688)
@@ -367,4 +367,21 @@
     public static ScheduledExecutorService protectedScheduledExecutorService(final ScheduledExecutorService target) {
         return new ProtectedScheduledExecutorService(target);
     }
+
+    /**
+     * Wrap a configurable executor with a preconfigured executor.
+     *
+     * @param configurableExecutor the configurable executor
+     * @param taskExecutor the direct executor to wrap tasks in, or {@code null} for none
+     * @param rejectionPolicy the rejection policy for the new executor
+     * @param handoffExecutor the handoff executor to use in the event of a rejected task
+     * @return a configured executor
+     */
+    public static Executor configuredExecutor(final ConfigurableExecutor configurableExecutor, final DirectExecutor taskExecutor, final RejectionPolicy rejectionPolicy, final Executor handoffExecutor) {
+        return new Executor() {
+            public void execute(final Runnable command) {
+                configurableExecutor.execute(command, taskExecutor, rejectionPolicy, handoffExecutor);
+            }
+        };
+    }
 }

Added: projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/QueuelessThreadPoolExecutor.java
===================================================================
--- projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/QueuelessThreadPoolExecutor.java	                        (rev 0)
+++ projects/jboss-threads/trunk/main/src/main/java/org/jboss/threads/QueuelessThreadPoolExecutor.java	2009-06-02 18:08:13 UTC (rev 89688)
@@ -0,0 +1,56 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2009, Red Hat Middleware LLC, and individual contributors
+ * as indicated by the @author tags. See the copyright.txt file in the
+ * distribution for a full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+
+package org.jboss.threads;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Create a queueless thread pool executor.
+ */
+public final class QueuelessThreadPoolExecutor extends ThreadPoolExecutor implements ConfigurableExecutor {
+
+    /**
+     * Construct a new instance.
+     *
+     * @param keepAliveTime the thread keepalive time
+     * @param unit the time unit
+     */
+    public QueuelessThreadPoolExecutor(final long keepAliveTime, final TimeUnit unit) {
+        super(0, Integer.MAX_VALUE, keepAliveTime, unit, new SynchronousQueue<Runnable>());
+    }
+
+    /**
+     * Execute a task.  Tasks on a queueless executor are never rejected (unless the pool is shut down).
+     *
+     * @param task the task to execute
+     * @param taskExecutor the direct executor to use, or {@code null} to execute the task as-is
+     * @param policy the rejection policy (ignored)
+     * @param handoffExecutor the handoff executor (ignored)
+     */
+    public void execute(final Runnable task, final DirectExecutor taskExecutor, final RejectionPolicy policy, final Executor handoffExecutor) {
+        execute(taskExecutor == null || taskExecutor == JBossExecutors.directExecutor() ? task : JBossExecutors.executorTask(taskExecutor, task));
+    }
+}