1 files changed, 184 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-stable-20060304/sca/core/src/main/java/org/apache/tuscany/core/context/scope/AggregateScopeContext.java b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/main/java/org/apache/tuscany/core/context/scope/AggregateScopeContext.java
new file mode 100644
index 0000000000..19f554a625
--- /dev/null
+++ b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/main/java/org/apache/tuscany/core/context/scope/AggregateScopeContext.java
@@ -0,0 +1,184 @@
+/**
+ *
+ *  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.RuntimeConfiguration;
+import org.apache.tuscany.core.context.AbstractContext;
+import org.apache.tuscany.core.context.AggregateContext;
+import org.apache.tuscany.core.context.EventContext;
+import org.apache.tuscany.core.context.EventException;
+import org.apache.tuscany.core.context.InstanceContext;
+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;
+
+/**
+ * Manages the lifecycle of aggregate component contexts, i.e. contexts which contain child contexts
+ * 
+ * @see org.apache.tuscany.core.context.AggregateContext
+ * @version $Rev$ $Date$
+ */
+public class AggregateScopeContext extends AbstractContext implements ScopeContext {
+
+    // ----------------------------------
+    // Fields
+    // ----------------------------------
+
+    private EventContext eventContext;
+
+    private List<RuntimeConfiguration<InstanceContext>> configs = new ArrayList();
+
+    // Aggregate component contexts in this scope keyed by name
+    private Map<String, AggregateContext> contexts = new ConcurrentHashMap();
+
+    // indicates if a module start event has been previously propagated so child contexts added after can be notified
+    private boolean moduleScopeStarted;
+
+    // ----------------------------------
+    // Constructors
+    // ----------------------------------
+
+    public AggregateScopeContext(EventContext eventContext) {
+        assert (eventContext != null) : "Event context was null";
+        this.eventContext = eventContext;
+        name = "Aggregate Scope";
+    }
+
+    // ----------------------------------
+    // Lifecycle methods
+    // ----------------------------------
+
+    public void start() throws ScopeInitializationException {
+        for (RuntimeConfiguration<InstanceContext> configuration : configs) {
+            InstanceContext context = configuration.createInstanceContext();
+            if (!(context instanceof AggregateContext)) {
+                ScopeInitializationException e = new ScopeInitializationException("Context not an aggregate type");
+                e.addContextName(context.getName());
+                throw e;
+            }
+            AggregateContext aggregateCtx = (AggregateContext) context;
+            aggregateCtx.start();
+            contexts.put(aggregateCtx.getName(), aggregateCtx);
+        }
+        lifecycleState = RUNNING;
+    }
+
+    public void stop() throws ScopeRuntimeException {
+        for (AggregateContext context : contexts.values()) {
+            context.stop();
+        }
+    }
+
+    // ----------------------------------
+    // Methods
+    // ----------------------------------
+
+    public void registerConfigurations(List<RuntimeConfiguration<InstanceContext>> configurations) {
+        this.configs = configurations;
+    }
+
+    public void registerConfiguration(RuntimeConfiguration<InstanceContext> configuration) {
+        assert (configuration != null) : "Configuration was null";
+        configs.add(configuration);
+        if (lifecycleState == RUNNING) {
+            InstanceContext context = configuration.createInstanceContext();
+            if (!(context instanceof AggregateContext)) {
+                ScopeInitializationException e = new ScopeInitializationException("Context not an aggregate type");
+                e.setIdentifier(context.getName());
+                throw e;
+            }
+            AggregateContext aggregateCtx = (AggregateContext) context;
+            aggregateCtx.start();
+            if (moduleScopeStarted) {
+                aggregateCtx.fireEvent(EventContext.MODULE_START, null);
+            }
+            contexts.put(aggregateCtx.getName(), aggregateCtx);
+        }
+    }
+
+    public boolean isCacheable() {
+        return false;
+    }
+
+    public Object getInstance(QualifiedName qName) throws TargetException {
+        Object instance = null;
+        InstanceContext 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 Object getInstance(QualifiedName qName, boolean notify) throws TargetException {
+        return getInstance(qName);
+    }
+    
+    public InstanceContext getContext(String ctxName) {
+        checkInit();
+        return contexts.get(ctxName);
+    }
+
+    public InstanceContext getContextByKey(String ctxName, Object key) {
+        return getContext(ctxName);
+    }
+
+    public void removeContext(String ctxName) throws ScopeRuntimeException {
+        InstanceContext context = contexts.remove(ctxName);
+        if (context != null) {
+            context.stop();
+        }
+    }
+
+    public void removeContextByKey(String ctxName, Object key) throws ScopeRuntimeException {
+    }
+
+    public void onEvent(int type, Object message) throws EventException {
+        if (type == EventContext.MODULE_START) {
+            // track module starting so that aggregate contexts registered after the event are notified properly
+            moduleScopeStarted = true;
+        } else if (type == EventContext.MODULE_STOP) {
+            moduleScopeStarted = false;
+        }
+        // propagate events to child contexts
+        for (AggregateContext context : contexts.values()) {
+            context.fireEvent(type, message);
+        }
+    }
+    
+    public Object getImplementationInstance() throws TargetException{
+        return this;
+    }
+
+    public Object getImplementationInstance(boolean notify) throws TargetException{
+        return this;
+    }
+
+    private void checkInit() {
+        if (lifecycleState != RUNNING) {
+            throw new IllegalStateException("Scope not running [" + lifecycleState + "]");
+        }
+    }
+}