1 files changed, 63 insertions, 0 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/implementation/PojoWorkContextTunnel.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/implementation/PojoWorkContextTunnel.java
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index 0000000000..cef6675f05
--- /dev/null
+++ b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/implementation/PojoWorkContextTunnel.java
@@ -0,0 +1,63 @@
+/*
+ * 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.core.implementation;
+
+import org.apache.tuscany.spi.component.WorkContext;
+
+/**
+ * Class for tunneling a WorkContext through the invocation of a user class.
+ *
+ * @version $Rev$ $Date$
+ */
+public final class PojoWorkContextTunnel {
+    private PojoWorkContextTunnel() {
+    }
+
+    private static final ThreadLocal<WorkContext> CONTEXT = new ThreadLocal<WorkContext>();
+
+    /**
+     * 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 WorkContext setThreadWorkContext(WorkContext context) {
+        WorkContext old = CONTEXT.get();
+        CONTEXT.set(context);
+        return old;
+    }
+
+    /**
+     * Returns the WorkContext for the current thread.
+     *
+     * @return the WorkContext for the current thread
+     */
+    public static WorkContext getThreadWorkContext() {
+        return CONTEXT.get();
+    }
+}