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, 10 insertions, 2 deletions

diff --git a/java/src/Ice/Application.java b/java/src/Ice/Application.java
index 3c649f72301..4190f39043e 100644
--- a/java/src/Ice/Application.java
+++ b/java/src/Ice/Application.java
@@ -240,16 +240,22 @@ public abstract class Application
 
         synchronized(_mutex)
         {
+            boolean interrupted = false;
             while(_callbackInProgress)
             {
                 try
                 {
                     _mutex.wait();
                 }
-                catch(java.lang.InterruptedException ex)
+                catch(InterruptedException ex)
                 {
+                    interrupted = true;
                 }
             }
+            if(interrupted)
+            {
+                Thread.currentThread().interrupt();
+            }
 
             if(_destroyed)
             {
@@ -504,7 +510,7 @@ public abstract class Application
             }
 
             //
-            // Note that we let the IllegalStateException propogate
+            // Note that we let the IllegalStateException propagate
             // out if necessary.
             //
             if(newHook != null)
@@ -590,6 +596,7 @@ public abstract class Application
                     }
                     catch(InterruptedException ex)
                     {
+                        break;
                     }
                 }
             }
@@ -625,6 +632,7 @@ public abstract class Application
                     }
                     catch(InterruptedException ex)
                     {
+                        break;
                     }
                 }
             }