1 files changed, 114 insertions, 0 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/CompositeScopeContainer.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/CompositeScopeContainer.java
new file mode 100644
index 0000000000..1a5dbcdcd4
--- /dev/null
+++ b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/CompositeScopeContainer.java
@@ -0,0 +1,114 @@
+/*
+ * 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.component.scope;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.osoa.sca.annotations.EagerInit;
+import org.osoa.sca.annotations.Service;
+
+import org.apache.tuscany.api.annotation.Monitor;
+import org.apache.tuscany.spi.component.AtomicComponent;
+import org.apache.tuscany.spi.component.InstanceWrapper;
+import org.apache.tuscany.spi.component.ScopeContainerMonitor;
+import org.apache.tuscany.spi.component.TargetDestructionException;
+import org.apache.tuscany.spi.component.TargetInitializationException;
+import org.apache.tuscany.spi.component.TargetNotFoundException;
+import org.apache.tuscany.spi.component.TargetResolutionException;
+import org.apache.tuscany.spi.component.ScopeContainer;
+import org.apache.tuscany.spi.model.Scope;
+
+/**
+ * A scope context which manages atomic component instances keyed by composite
+ *
+ * @version $Rev$ $Date$
+ */
+@EagerInit
+@Service(ScopeContainer.class)
+public class CompositeScopeContainer<KEY> extends AbstractScopeContainer<KEY> {
+    private static final InstanceWrapper<Object> EMPTY = new InstanceWrapper<Object>() {
+        public Object getInstance() {
+            return null;
+        }
+
+        public boolean isStarted() {
+            return true;
+        }
+
+        public void start() throws TargetInitializationException {
+
+        }
+
+        public void stop() throws TargetDestructionException {
+
+        }
+    };
+
+    // there is one instance per component so we can index directly
+    private final Map<AtomicComponent<?>, InstanceWrapper<?>> instanceWrappers =
+        new ConcurrentHashMap<AtomicComponent<?>, InstanceWrapper<?>>();
+
+    public CompositeScopeContainer(@Monitor ScopeContainerMonitor monitor) {
+        super(Scope.COMPOSITE, monitor);
+    }
+
+    public <T> void register(AtomicComponent<T> component, URI groupId) {
+        super.register(component, groupId);
+        instanceWrappers.put(component, EMPTY);
+    }
+
+    public <T> void unregister(AtomicComponent<T> component) {
+        // FIXME should this component be destroyed already or do we need to stop it?
+        instanceWrappers.remove(component);
+        super.unregister(component);
+    }
+
+    public synchronized void stop() {
+        super.stop();
+        instanceWrappers.clear();
+    }
+
+    public <T> InstanceWrapper<T> getWrapper(AtomicComponent<T> component, KEY contextId)
+        throws TargetResolutionException {
+        assert instanceWrappers.containsKey(component);
+        @SuppressWarnings("unchecked")
+        InstanceWrapper<T> wrapper = (InstanceWrapper<T>) instanceWrappers.get(component);
+        if (wrapper == EMPTY) {
+            // FIXME is there a potential race condition here that may result in two instances being created
+            wrapper = createInstance(component);
+            instanceWrappers.put(component, wrapper);
+            wrapper.start();
+            destroyQueues.get(contextId).add(wrapper);
+        }
+        return wrapper;
+    }
+
+    public <T> InstanceWrapper<T> getAssociatedWrapper(AtomicComponent<T> component, KEY contextId)
+        throws TargetResolutionException {
+        assert instanceWrappers.containsKey(component);
+        @SuppressWarnings("unchecked")
+        InstanceWrapper<T> wrapper = (InstanceWrapper<T>) instanceWrappers.get(component);
+        if (wrapper == EMPTY) {
+            throw new TargetNotFoundException(component.getUri().toString());
+        }
+        return wrapper;
+    }
+}