diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/context/impl/EventContextImpl.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/context/impl/EventContextImpl.java | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/context/impl/EventContextImpl.java b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/context/impl/EventContextImpl.java new file mode 100644 index 0000000000..6888e66f20 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/context/impl/EventContextImpl.java @@ -0,0 +1,81 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * Licensed 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.context.impl; + +import org.apache.tuscany.core.context.EventContext; +import org.apache.tuscany.core.context.ScopeIdentifier; + +import java.util.HashMap; +import java.util.Map; + +/** + * An implementation of an {@link org.apache.tuscany.core.context.EventContext} that handles event-to-thread associations using an + * <code>InheritableThreadLocal</code> + * + * @version $Rev$ $Date$ + */ +public class EventContextImpl implements EventContext { + + // @TODO design a proper propagation strategy for creating new threads + /* + * a map ( associated with the current thread) of scope identifiers keyed on the event context id type. the scope identifier + * may be a {@link ScopeIdentifier} or an opaque id + */ + private ThreadLocal<Map> eventContext = new InheritableThreadLocal<Map>(); + + public Object getIdentifier(Object type) { + Map map = eventContext.get(); + if (map == null) { + return null; + } + Object currentId = map.get(type); + if (currentId instanceof ScopeIdentifier) { + currentId = ((ScopeIdentifier) currentId).getIdentifier(); + // once we have accessed the id, replace the lazy wrapper + map.put(type, currentId); + } + return currentId; + } + + public void setIdentifier(Object type, Object identifier) { + Map map = eventContext.get(); + if (map == null) { + map = new HashMap(); + eventContext.set(map); + } + map.put(type, identifier); + } + + public void clearIdentifier(Object type) { + if (type == null) { + return; + } + Map map = eventContext.get(); + if (map != null) { + map.remove(type); + } + } + + public void clearIdentifiers() { + eventContext.remove(); + } + + public EventContextImpl() { + super(); + } + +} |