1 files changed, 100 insertions, 0 deletions
diff --git a/plugins/org.eclipse.net4j.tests/src/org/eclipse/net4j/tests/util/BlockingDetector.java b/plugins/org.eclipse.net4j.tests/src/org/eclipse/net4j/tests/util/BlockingDetector.java
new file mode 100644
index 0000000000..6aa8cef915
--- /dev/null
+++ b/plugins/org.eclipse.net4j.tests/src/org/eclipse/net4j/tests/util/BlockingDetector.java
@@ -0,0 +1,100 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 2005, 2006 Eike Stepper, Sympedia Methods and Tools.
+ * 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:
+ *    Eike Stepper - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.net4j.test.util;
+
+
+import junit.framework.Assert;
+
+
+public abstract class BlockingDetector
+{
+  public static final long DEFAULT_WAIT_MILLIS = 100;
+
+  protected Thread thread;
+
+  protected BlockableOperationException exception;
+
+  public BlockingDetector(Object target, Object monitor, boolean blockingExpected) throws Throwable
+  {
+    this(target, monitor, blockingExpected, DEFAULT_WAIT_MILLIS);
+  }
+
+  public BlockingDetector(Object target, Object monitor, boolean blockingExpected, long waitMillis)
+      throws Throwable
+  {
+    startOperation(target);
+
+    try
+    {
+      Thread.sleep(waitMillis);
+    }
+    catch (InterruptedException ex)
+    {
+      throw new BlockableOperationException(ex);
+    }
+
+    if (exception != null)
+    {
+      throw exception.getCause();
+    }
+
+    boolean alive = thread.isAlive();
+
+    if (alive) synchronized (monitor)
+    {
+      monitor.notifyAll();
+    }
+
+    if (blockingExpected)
+    {
+      Assert.assertTrue("blocking expected", alive);
+    }
+    else
+    {
+      Assert.assertTrue("no blocking expected", !alive);
+    }
+  }
+
+  public void startOperation(final Object target)
+  {
+    thread = new Thread()
+    {
+
+      public void run()
+      {
+        try
+        {
+          blockableOperation(target);
+        }
+        catch (Exception ex)
+        {
+          exception = new BlockableOperationException(ex);
+          throw exception;
+        }
+      }
+    };
+
+    thread.start();
+  }
+
+  protected abstract void blockableOperation(Object target) throws Exception;
+
+
+  private static class BlockableOperationException extends RuntimeException
+  {
+    private static final long serialVersionUID = 1L;
+
+    public BlockableOperationException(Exception ex)
+    {
+      super(ex);
+    }
+  }
+}
+\ No newline at end of file