From cdc40905ce50878dc894a27f6d30661517e59ad4 Mon Sep 17 00:00:00 2001
From: jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68>
Date: Tue, 9 Sep 2008 02:37:58 +0000
Subject: Creating a branch for the android work.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@693346 13f79535-47bb-0310-9956-ffa450edef68
---
 .../sca/core/invocation/ThreadMessageContext.java  | 72 ++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 branches/sca-android/core-android/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java

(limited to 'branches/sca-android/core-android/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java')

diff --git a/branches/sca-android/core-android/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java b/branches/sca-android/core-android/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java
new file mode 100644
index 0000000000..d5085289e9
--- /dev/null
+++ b/branches/sca-android/core-android/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.core.invocation;
+
+import org.apache.tuscany.sca.core.assembly.EndpointReferenceImpl;
+import org.apache.tuscany.sca.invocation.Message;
+
+/**
+ * Class for tunnelling a WorkContext through the invocation of a user class.
+ *
+ * @version $Rev: 639271 $ $Date: 2008-03-20 05:54:38 -0700 (Thu, 20 Mar 2008) $
+ */
+public final class ThreadMessageContext {
+
+    private static final ThreadLocal<Message> CONTEXT = new ThreadLocal<Message>() {
+        @Override
+        protected synchronized Message initialValue() {
+            Message msg =  new MessageImpl();
+            msg.setFrom(new EndpointReferenceImpl("/"));
+            return msg;
+        }
+    };
+
+    private ThreadMessageContext() {
+    }
+
+    /**
+     * Set the WorkContext for the current thread.
+     * The current work context is returned and must be restored after the invocation is complete.
+     * Typical usage would be:
+     * <pre>
+     *   WorkContext old = PojoWorkContextTunnel.setThreadWorkContext(newContext);
+     *   try {
+     *      ... invoke user code ...
+     *   } finally {
+     *     PojoWorkContextTunnel.setThreadWorkContext(old);
+     *   }
+     * </pre>
+     * @param context
+     * @return the current work context for the thread; this must be restored after the invocation is made
+     */
+    public static Message setMessageContext(Message context) {
+        Message old = CONTEXT.get();
+        CONTEXT.set(context);
+        return old;
+    }
+
+    /**
+     * Returns the WorkContext for the current thread.
+     *
+     * @return the WorkContext for the current thread
+     */
+    public static Message getMessageContext() {
+        return CONTEXT.get();
+    }
+}
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