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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
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+++ 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();
+ }
+
+}