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/*
* 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.binding.local;
import java.lang.reflect.InvocationTargetException;
import org.apache.tuscany.spi.wire.Interceptor;
import org.apache.tuscany.spi.wire.InvocationChain;
import org.apache.tuscany.spi.wire.InvocationRuntimeException;
import org.apache.tuscany.spi.wire.Message;
import org.apache.tuscany.spi.wire.TargetInvoker;
import org.apache.tuscany.spi.component.WorkContext;
/**
* Base class for dispatching to a composite reference using the local binding
*
* @version $Rev$ $Date$
*/
public abstract class AbstractLocalTargetInvoker implements TargetInvoker {
protected boolean cacheable;
public boolean isCacheable() {
return cacheable;
}
public void setCacheable(boolean cacheable) {
this.cacheable = cacheable;
}
public boolean isOptimizable() {
return isCacheable(); // we only need to check if the scopes are correct
}
public Object invokeTarget(final Object payload, short sequence, WorkContext workContext) throws InvocationTargetException {
throw new InvocationTargetException(new UnsupportedOperationException());
}
protected Message invoke(InvocationChain chain, TargetInvoker invoker, Message msg) throws Throwable {
Interceptor headInterceptor = chain.getHeadInterceptor();
if (headInterceptor == null) {
try {
// short-circuit the dispatch and invoke the target directly
if (invoker == null) {
String name = chain.getOperation().getName();
throw new AssertionError("No target invoker [" + name + "]");
}
return invoker.invoke(msg);
} catch (InvocationRuntimeException e) {
// the cause was thrown by the target so throw it
throw e.getCause();
}
} else {
msg.setTargetInvoker(invoker);
return headInterceptor.invoke(msg);
}
}
@Override
public AbstractLocalTargetInvoker clone() throws CloneNotSupportedException {
return (AbstractLocalTargetInvoker) super.clone();
}
}
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