Add cached impl for TUSCANY-3054.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@776802 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 129 insertions, 0 deletions

diff --git a/branches/sca-java-1.x/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/ClassCachedJavaInterfaceFactoryImpl.java b/branches/sca-java-1.x/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/ClassCachedJavaInterfaceFactoryImpl.java
new file mode 100644
index 0000000000..bb085c9cf9
--- /dev/null
+++ b/branches/sca-java-1.x/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/ClassCachedJavaInterfaceFactoryImpl.java
@@ -0,0 +1,129 @@
+/*

+ * 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.sca.interfacedef.java.impl;

+

+import java.io.IOException;

+import java.util.Map;

+import java.util.WeakHashMap;

+import java.util.List;

+import java.util.Set;

+

+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;

+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;

+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;

+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;

+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;

+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;

+import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceFactoryImpl;

+import org.apache.tuscany.sca.interfacedef.java.impl.PolicyJavaInterfaceVisitor;

+import org.apache.tuscany.sca.interfacedef.java.introspect.JavaInterfaceVisitor;

+import org.apache.tuscany.sca.policy.PolicyFactory;

+

+/**

+ * A factory for the Java interface model, using Class object as key to cache JavaInterface

+ *

+ * @version $Rev$ $Date$

+ */

+public class ClassCachedJavaInterfaceFactoryImpl extends JavaInterfaceFactoryImpl implements JavaInterfaceFactory {

+

+    private ModelFactoryExtensionPoint modelFactoryExtensionPoint;

+    private boolean loadedVisitors; 

+    

+    private static Cache cache = new Cache();

+

+    public ClassCachedJavaInterfaceFactoryImpl () {

+    }

+    

+    public ClassCachedJavaInterfaceFactoryImpl(ModelFactoryExtensionPoint modelFactoryExtensionPoint) {

+        this.modelFactoryExtensionPoint = modelFactoryExtensionPoint;

+    }

+    

+    @Override

+    public List<JavaInterfaceVisitor> getInterfaceVisitors() {

+        loadVisitors();

+        return super.getInterfaceVisitors();

+    }

+    

+    /**

+     * Load visitors declared under META-INF/services

+     */

+    @SuppressWarnings("unchecked")

+    private synchronized void loadVisitors() {

+        if (loadedVisitors)

+            return;

+        

+        if (modelFactoryExtensionPoint != null) {

+            PolicyFactory policyFactory = modelFactoryExtensionPoint.getFactory(PolicyFactory.class);

+            if (policyFactory != null) {

+                addInterfaceVisitor(new PolicyJavaInterfaceVisitor(policyFactory));

+            }

+        }

+        

+        // Get the databinding service declarations

+        Set<ServiceDeclaration> visitorDeclarations; 

+        try {

+            visitorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(JavaInterfaceVisitor.class);

+        } catch (IOException e) {

+            throw new IllegalStateException(e);

+        }

+        

+        // Load data bindings

+        for (ServiceDeclaration visitorDeclaration: visitorDeclarations) {

+            JavaInterfaceVisitor visitor;

+            try {

+                Class<JavaInterfaceVisitor> visitorClass = (Class<JavaInterfaceVisitor>)visitorDeclaration.loadClass();

+                visitor = visitorClass.newInstance();

+            } catch (ClassNotFoundException e) {

+                throw new IllegalArgumentException(e);

+            } catch (InstantiationException e) {

+                throw new IllegalArgumentException(e);

+            } catch (IllegalAccessException e) {

+                throw new IllegalArgumentException(e);

+            }

+            addInterfaceVisitor(visitor);

+        }

+        

+        loadedVisitors = true;

+    }

+

+    public JavaInterface createJavaInterface(Class<?> interfaceClass) throws InvalidInterfaceException {

+

+        JavaInterface javaInterface = cache.get(interfaceClass);

+        if (javaInterface == null) {

+            javaInterface  = super.createJavaInterface(interfaceClass);

+            cache.put(interfaceClass, javaInterface);

+        }

+

+        return javaInterface;

+    }

+

+    private static class Cache {

+

+        private Map<Class,JavaInterface> _cache = new WeakHashMap<Class,JavaInterface>();

+

+        public synchronized JavaInterface get(Class<?> interfaceClass) {

+            return _cache.get(interfaceClass);

+        }

+

+        public synchronized void put(Class<?> interfaceClass, JavaInterface javaInterface) {

+            _cache.put(interfaceClass, javaInterface);

+        }

+    }

+

+}