-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-/*\r
- *\r
- * @author Toni Kalajainen\r
- */\r
-package org.simantics.utils.threads;\r
-\r
-import java.util.concurrent.Callable;\r
-import java.util.concurrent.ScheduledFuture;\r
-import java.util.concurrent.ScheduledThreadPoolExecutor;\r
-import java.util.concurrent.TimeUnit;\r
-\r
-\r
-public class ExecutorWorker {\r
- \r
- private static ExecutorWorker instance;\r
- \r
- static class DelayedExecution implements Comparable<DelayedExecution> {\r
- Executable executable;\r
- long executionTime;\r
- @Override\r
- public int compareTo(DelayedExecution o) {\r
- if (o.executionTime<executionTime) return -1;\r
- if (o.executionTime>executionTime) return 1;\r
- return 0;\r
- }\r
- }\r
-\r
- public static ExecutorWorker getInstance()\r
- {\r
- if (instance == null)\r
- instance = new ExecutorWorker();\r
- return instance;\r
- }\r
- \r
- ExecutorWorker() { \r
- } \r
-\r
- ScheduledThreadPoolExecutor pool = new ScheduledThreadPoolExecutor(1);\r
- \r
- public synchronized ScheduledFuture<Object> timerExec(final Executable executable, int delay)\r
- {\r
- Callable<Object> c = new Callable<Object>() {\r
- @Override\r
- public Object call() throws Exception {\r
- // FIXME: executable.runnable gets called twice!\r
- ThreadUtils.asyncExec(executable.threadAccess, executable.runnable);\r
- //executable.runnable.run();\r
- return null;\r
- }\r
- }; \r
- return pool.schedule(c, delay, TimeUnit.MILLISECONDS);\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2018 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ * Semantum Oy - added shutdown facilities
+ *******************************************************************************/
+
+package org.simantics.utils.threads;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * @author Toni Kalajainen
+ * @author Tuukka Lehtonen
+ */
+public class ExecutorWorker {
+
+ private static volatile ExecutorWorker instance;
+
+ public static ExecutorWorker getInstance() {
+ if (instance == null) {
+ synchronized (ExecutorWorker.class) {
+ if (instance == null)
+ instance = new ExecutorWorker();
+ }
+ }
+ return instance;
+ }
+
+ private ExecutorWorker() {}
+
+ private final AtomicInteger counter = new AtomicInteger(0);
+ private final ThreadGroup threadGroup = new ThreadGroup("ExecutorWorker-Group");
+ private ScheduledThreadPoolExecutor pool = new ScheduledThreadPoolExecutor(1, r -> {
+ Thread t = new Thread(threadGroup, r, "ExecutorWorker-" + (counter.incrementAndGet()));
+ if (!t.isDaemon())
+ t.setDaemon(true);
+ if (t.getPriority() != Thread.NORM_PRIORITY)
+ t.setPriority(Thread.NORM_PRIORITY);
+ return t;
+ });
+
+ public synchronized ScheduledFuture<Object> timerExec(final Executable executable, int delay)
+ {
+ Callable<Object> c = () -> {
+ ThreadUtils.asyncExec(executable.threadAccess, executable.runnable);
+ return null;
+ };
+ return pool.schedule(c, delay, TimeUnit.MILLISECONDS);
+ }
+
+ private void shutdownThis() {
+ ScheduledThreadPoolExecutor e = pool;
+ if (e != null) {
+ pool = null;
+ ThreadUtils.shutdownAndAwaitTermination(e, 1000);
+ }
+ }
+
+ public static synchronized void shutdown() {
+ ExecutorWorker i = instance;
+ if (i != null) {
+ instance = null;
+ i.shutdownThis();
+ }
+ }
+
+}