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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta4-RC0/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ThreadMessageContext.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta4-RC0/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ThreadMessageContext.java b/sca-java-2.x/tags/2.0-Beta4-RC0/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ThreadMessageContext.java new file mode 100644 index 0000000000..136f226781 --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta4-RC0/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ThreadMessageContext.java @@ -0,0 +1,83 @@ +/* + * 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.context; + +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 { + + private static final ThreadLocal<Message> CONTEXT = new ThreadLocal<Message>(); + + private static final ThreadLocal<Message> PREVIOUS_CONTEXT = new ThreadLocal<Message>(); + + 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); + PREVIOUS_CONTEXT.set(old); + return old; + } + + /** + * Returns the WorkContext for the current thread. + * + * @return the WorkContext for the current thread + */ + public static Message getMessageContext() { + return CONTEXT.get(); + } + + public static Message getPreviousMessageContext() { + return PREVIOUS_CONTEXT.get(); + } + + /** + * Removes and state from the current thread to ensure that + * any associated classloaders can be GCd + */ + public static void removeMessageContext() { + CONTEXT.remove(); + } + + public static void removePreviousMessageContext() { + PREVIOUS_CONTEXT.remove(); + } +} |