ICE-1593 Handling thread interrupts in Java

- Added Ice.BackgroundIO property to perform all IO in a non-user
  thread. This makes Ice for Java interrupt safe. This is implemented
  by the QueueRequestHanbler.
- EndpointHostResolver now uses an executor instead of a thread.
- Added java/demo/Ice/interrupt and java/test/Ice/interrupt.
- Made several changes that must be ported to C++ & C#.
  - InvocationTimeout exceptions can hang forever.
  - Connection establishment is always asynchronous.
  - RequestHandler.requestTimeout and asyncRequestTimeout have been
    renamed to requestCancel and asyncRequestCancel.

1 files changed, 69 insertions, 0 deletions

diff --git a/java/test/Ice/interrupt/TestControllerI.java b/java/test/Ice/interrupt/TestControllerI.java
new file mode 100644
index 00000000000..c3b9088393f
--- /dev/null
+++ b/java/test/Ice/interrupt/TestControllerI.java
@@ -0,0 +1,69 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+package test.Ice.interrupt;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class TestControllerI extends test.Ice.interrupt.Test._TestIntfControllerDisp
+{
+    synchronized void
+    addUpcallThread()
+    {
+        _threads.add(Thread.currentThread());
+    }
+    
+    synchronized void 
+    removeUpcallThread()
+    {
+        _threads.remove(Thread.currentThread());
+        //
+        // Clear the interrupted state after removing the thread.
+        //
+        Thread.interrupted();
+    }
+    
+    @Override
+    synchronized public void
+    interrupt(Ice.Current __current)
+        throws test.Ice.interrupt.Test.CannotInterruptException
+    {
+        if(_threads.isEmpty())
+        {
+            throw new test.Ice.interrupt.Test.CannotInterruptException();
+        }
+        for(Thread t : _threads)
+        {
+            t.interrupt();
+        }
+    }
+
+    @Override
+    public void
+    holdAdapter(Ice.Current current)
+    {
+        _adapter.hold();
+    }
+    
+    @Override
+    public void
+    resumeAdapter(Ice.Current current)
+    {
+        _adapter.activate();
+    }
+
+    TestControllerI(Ice.ObjectAdapter adapter)
+    {
+        _adapter = adapter;
+    }
+
+    final private Ice.ObjectAdapter _adapter;
+    final private List<Thread> _threads = new ArrayList<Thread>();
+}