1 files changed, 156 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/context/scope/CompositeScopeContext.java b/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/context/scope/CompositeScopeContext.java
new file mode 100644
index 0000000000..7468ff9dd6
--- /dev/null
+++ b/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/context/scope/CompositeScopeContext.java
@@ -0,0 +1,156 @@
+/**
+ *
+ *  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.scope;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.tuscany.core.builder.ContextFactory;
+import org.apache.tuscany.core.context.CompositeContext;
+import org.apache.tuscany.core.context.Context;
+import org.apache.tuscany.core.context.EventContext;
+import org.apache.tuscany.core.context.QualifiedName;
+import org.apache.tuscany.core.context.ScopeContext;
+import org.apache.tuscany.core.context.ScopeInitializationException;
+import org.apache.tuscany.core.context.ScopeRuntimeException;
+import org.apache.tuscany.core.context.TargetException;
+import org.apache.tuscany.core.context.event.Event;
+import org.apache.tuscany.core.context.event.ModuleStart;
+import org.apache.tuscany.core.context.event.ModuleStop;
+import org.apache.tuscany.core.context.impl.AbstractLifecycle;
+
+/**
+ * Manages the lifecycle of composite component contexts, i.e. contexts which contain child contexts
+ *
+ * @see org.apache.tuscany.core.context.CompositeContext
+ * @version $Rev$ $Date$
+ */
+public class CompositeScopeContext extends AbstractLifecycle implements ScopeContext {
+
+    private List<ContextFactory<Context>> configs = new ArrayList<ContextFactory<Context>>();
+
+    // Composite component contexts in this scope keyed by name
+    private Map<String, CompositeContext> contexts = new ConcurrentHashMap<String, CompositeContext>();
+
+    // indicates if a module start event has been previously propagated so child contexts added after can be notified
+    private boolean moduleScopeStarted;
+
+    public CompositeScopeContext(EventContext eventContext) {
+        assert (eventContext != null) : "Event context was null";
+        setName("Composite Scope");
+    }
+
+    public void start() throws ScopeInitializationException {
+        for (ContextFactory<Context> configuration : configs) {
+            Context context = configuration.createContext();
+            if (!(context instanceof CompositeContext)) {
+                ScopeInitializationException e = new ScopeInitializationException("Context not an composite type");
+                e.addContextName(context.getName());
+                throw e;
+            }
+            CompositeContext compositeCtx = (CompositeContext) context;
+            compositeCtx.start();
+            contexts.put(compositeCtx.getName(), compositeCtx);
+        }
+        lifecycleState = RUNNING;
+    }
+
+    public void stop() throws ScopeRuntimeException {
+        for (CompositeContext context : contexts.values()) {
+            context.stop();
+        }
+    }
+
+    public void registerFactories(List<ContextFactory<Context>> configurations) {
+        this.configs = configurations;
+    }
+
+    public void registerFactory(ContextFactory<Context> configuration) {
+        assert (configuration != null) : "Configuration was null";
+        configs.add(configuration);
+        if (getLifecycleState() == RUNNING) {
+            Context context = configuration.createContext();
+            if (!(context instanceof CompositeContext)) {
+                ScopeInitializationException e = new ScopeInitializationException("Context not an composite type");
+                e.setIdentifier(context.getName());
+                throw e;
+            }
+            CompositeContext compositeCtx = (CompositeContext) context;
+            compositeCtx.start();
+            if (moduleScopeStarted) {
+                compositeCtx.publish(new ModuleStart(this));
+            }
+            contexts.put(compositeCtx.getName(), compositeCtx);
+        }
+    }
+
+    public boolean isCacheable() {
+        return false;
+    }
+
+    public Object getInstance(QualifiedName qName) throws TargetException {
+        Context context = getContext(qName.getPartName());
+        if (context == null) {
+            TargetException e = new TargetException("Component not found");
+            e.setIdentifier(qName.getQualifiedName());
+            throw e;
+        }
+        return context.getInstance(qName);
+    }
+
+    public Context getContext(String ctxName) {
+        checkInit();
+        return contexts.get(ctxName);
+    }
+
+    public Context getContextByKey(String ctxName, Object key) {
+        return getContext(ctxName);
+    }
+
+    public void removeContext(String ctxName) throws ScopeRuntimeException {
+        Context context = contexts.remove(ctxName);
+        if (context != null) {
+            context.stop();
+        }
+    }
+
+    public void removeContextByKey(String ctxName, Object key) throws ScopeRuntimeException {
+        throw new UnsupportedOperationException();
+    }
+
+    public void onEvent(Event event){
+        if (event instanceof ModuleStart) {
+            // track module starting so that composite contexts registered after the event are notified properly
+            moduleScopeStarted = true;
+        } else if (event instanceof ModuleStop) {
+            moduleScopeStarted = false;
+            publish(event);
+        }
+        // propagate events to child contexts
+        for (CompositeContext context : contexts.values()) {
+            context.publish(event);
+        }
+    }
+
+    private void checkInit() {
+        if (getLifecycleState()!= RUNNING) {
+            throw new IllegalStateException("Scope not running [" + getLifecycleState() + "]");
+        }
+    }
+}