Made the ThreadPoolExecutorFactory more configurable, but also with more sensible defaults.

- The queue for background jobs is unlimited - A smaller number of core threads is maintained - It is possible to set the threads' priority (default low) Added hasAspect() method to XPath functions. Various other cosmetic changes. git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@6146 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
2025-07-24 17:32:48 +00:00 · 2007-07-04 00:51:54 +00:00
parent 4b0491c232
commit d1a9347c09
9 changed files with 256 additions and 42 deletions
--- a/source/java/org/alfresco/util/TraceableThreadFactory.java
+++ b/source/java/org/alfresco/util/TraceableThreadFactory.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2005-2007 Alfresco Software Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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 General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of 
+ * the GPL, you may redistribute this Program in connection with Free/Libre 
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's 
+ * FLOSS exception.  You should have recieved a copy of the text describing 
+ * the FLOSS exception, and it is also available here: 
+ * http://www.alfresco.com/legal/licensing"
+ */
+package org.alfresco.util;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * A thread factory that spawns threads that are statically visible.  Each factory uses a unique
+ * thread group.  All the groups that have been used can be fetched using
+ * {@link #getActiveThreadGroups()}, allowing iteration of the the threads in the group.
+ * 
+ * @since 2.1
+ * @author Derek Hulley
+ */
+public class TraceableThreadFactory implements ThreadFactory
+{
+    private static final AtomicInteger factoryNumber = new AtomicInteger(1);
+    private static List<ThreadGroup> activeThreadGroups = Collections.synchronizedList(new ArrayList<ThreadGroup>(1));
+    
+    /**
+     * Get a list of thread groups registered by the factory.
+     * 
+     * @return      Returns a snapshot of thread groups
+     */
+    public static List<ThreadGroup> getActiveThreadGroups()
+    {
+        return activeThreadGroups;
+    }
+    
+    private final ThreadGroup group;
+    private final String namePrefix;
+    private final AtomicInteger threadNumber;
+    private boolean threadDaemon;
+    private int threadPriority;
+    
+
+    TraceableThreadFactory()
+    {
+        this.group = new ThreadGroup("TraceableThreadGroup-" + factoryNumber.getAndIncrement());
+        TraceableThreadFactory.activeThreadGroups.add(this.group);
+        
+        this.namePrefix = "TraceableThread-" + factoryNumber.getAndIncrement() + "-thread-";
+        this.threadNumber = new AtomicInteger(1);
+    }
+
+    /**
+     * @param daemon            <tt>true</tt> if all threads created must be daemon threads
+     */
+    public void setThreadDaemon(boolean daemon)
+    {
+        this.threadDaemon = daemon;
+    }
+
+    /**
+     * 
+     * @param threadPriority    the threads priority from 1 (lowest) to 10 (highest)
+     */
+    public void setThreadPriority(int threadPriority)
+    {
+        this.threadPriority = threadPriority;
+    }
+
+    public Thread newThread(Runnable r)
+    {
+        Thread thread = new Thread(
+                group,
+                r,
+                namePrefix + threadNumber.getAndIncrement(),
+                0);
+        thread.setDaemon(threadDaemon);
+        thread.setPriority(threadPriority);
+        
+        return thread;
+    }
+}