From 5fa5ff3a8138a7f90645a606e35e7a6695fad5c6 Mon Sep 17 00:00:00 2001
From: John Cortell
Date: Wed, 10 Nov 2010 16:47:55 +0000
Subject: Bug 329481: Inconsistency in DSF ACPM cancel behavior.

---
 .../eclipse/cdt/dsf/concurrent/AbstractCache.java  |  2 +-
 .../eclipse/cdt/dsf/concurrent/RequestCache.java   | 22 ++++++++++------------
 2 files changed, 11 insertions(+), 13 deletions(-)

(limited to 'dsf/org.eclipse.cdt.dsf')

diff --git a/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/AbstractCache.java b/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/AbstractCache.java
index e6985ea6bf..e4ad222a07 100644
--- a/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/AbstractCache.java
+++ b/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/AbstractCache.java
@@ -37,7 +37,7 @@ public abstract class AbstractCache<V> implements ICache<V> {
     
     private class RequestCanceledListener implements RequestMonitor.ICanceledListener {
         public void requestCanceled(final RequestMonitor canceledRm) {
-            fExecutor.execute(new Runnable() {
+            fExecutor.getDsfExecutor().execute(new Runnable() {
                 public void run() {
                     handleCanceledRm(canceledRm);
                 }
diff --git a/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/RequestCache.java b/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/RequestCache.java
index dbf8f669b3..76b94d6e14 100644
--- a/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/RequestCache.java
+++ b/dsf/org.eclipse.cdt.dsf/src/org/eclipse/cdt/dsf/concurrent/RequestCache.java
@@ -12,7 +12,6 @@ package org.eclipse.cdt.dsf.concurrent;
  *******************************************************************************/ 
  
 import org.eclipse.core.runtime.IStatus;
-import org.eclipse.core.runtime.Status;
 
 /** 
  * A general purpose cache, which caches the result of a single request.
@@ -46,25 +45,24 @@ public abstract class RequestCache<V> extends AbstractCache<V> {
         
         fRm = new DataRequestMonitor<V>(getImmediateInDsfExecutor(), null) {
             
-            private IStatus fRawStatus = Status.OK_STATUS;
-            
             @Override 
             protected void handleCompleted() {
                 if (this == fRm) {
                     fRm = null;
-                    IStatus status;
-                    synchronized (this) {
-                        status = fRawStatus;
+					// If the requestor canceled the request, then leave the
+					// cache as is, regardless of how the retrieval completes.
+					// We want the cache to stay in the invalid state so that
+					// it remains functional. The request may have completed
+					// successfully, and it may be tempting to use the result in
+					// that case, but that opens up a can of worms. We'll follow
+					// the behavior in RequestMonitor: when an RM is canceled,
+					// it's canceled; period.
+                    if (!isCanceled()) {
+                    	set(getData(), getStatus());                    	
                     }
-                    set(getData(), status); 
                 }
             } 
             
-            @Override
-            public synchronized void setStatus(IStatus status) {
-                fRawStatus = status;
-            };
-            
             @Override
             public boolean isCanceled() {
                 return super.isCanceled() || RequestCache.this.isCanceled();
-- 
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