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Timestamp:

2009-12-28T13:30:18+01:00 (15 years ago)

Author:

stotz

Message:

Simplified instance creation

File:

-              r18772
+              r19231
 public class JobDispatcher {
     private static JobDispatcher instance;
+    private static final JobDispatcher instance = new JobDispatcher();
     /**
 …
      */
     public static JobDispatcher getInstance() {
+        // for speed reasons we check if the instance has been created
+        // one time before we enter the synchronized section...
+        if (instance != null)
+            return instance;
+        synchronized (JobDispatcher.class) {
+            // ... and for thread safety reasons one time inside the
+            // synchronized section.
+            if (instance != null)
+                return instance;
+            new JobDispatcher();
+            return instance;
+        }
+        return instance;
+    }
     private JobDispatcher() {
-        instance = this;
         addWorkerThread().firstThread = true;
+    }
 …
             workerThreadCount++;
+        }
+        jobThread.start();
         return jobThread;
+    }
 …
             setDaemon(true);
             job = null;
-            start();
+        }

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