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author | nash <nash@13f79535-47bb-0310-9956-ffa450edef68> | 2011-03-30 19:50:51 +0000 |
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committer | nash <nash@13f79535-47bb-0310-9956-ffa450edef68> | 2011-03-30 19:50:51 +0000 |
commit | 3a569a2f00bf172cddfd567149774ee808a2a242 (patch) | |
tree | 5b18450a44f7f33a4d3c56780393f15331150347 /sca-java-1.x/branches/sca-java-1.6.2/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java | |
parent | c1fc4bd1ac2a2133b870e4314424cfd050bef607 (diff) |
Create branch for 1.6.2
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1087059 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-1.6.2/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java new file mode 100644 index 0000000000..becf5f9295 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/ThreadMessageContext.java @@ -0,0 +1,89 @@ +/* + * 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 $Rev$ $Date$ + */ +public final class ThreadMessageContext { + + // TUSCANY-3770: Used as a marker for detecting when thread context information can be removed + private static final Message msg = new MessageImpl(); + + private static final ThreadLocal<Message> CONTEXT = new ThreadLocal<Message>() { + @Override + protected synchronized Message initialValue() { + 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); + + // TUSCANY-3770: Remove thread context information when the request invocation has completed + if (context == msg) { + CONTEXT.remove(); + } + + return old; + } + + /** + * Returns the WorkContext for the current thread. + * + * @return the WorkContext for the current thread + */ + public static Message getMessageContext() { + return CONTEXT.get(); + } + + // TUSCANY-3770: This method is no longer needed, as thread context information is removed implicitly + /* + * Removes and state from the current thread to ensure that + * any associated classloaders can be GCd + * + public static void removeMessageContext() { + CONTEXT.remove(); + } + */ +} |