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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.sca.binding.sca.provider;
import java.util.Iterator;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.InvokerAsyncResponse;
import org.apache.tuscany.sca.invocation.Phase;
import org.apache.tuscany.sca.provider.EndpointAsyncProvider;
import org.apache.tuscany.sca.provider.OptimisingBindingProvider;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
/**
* The sca service binding provider mediates between the twin requirements of
* local sca bindings and remote sca bindings. In the local case is does
* very little. When the sca binding model is set as being remote this binding will
* try and create a remote service endpoint for remote references to connect to
*
* @version $Rev$ $Date$
*/
public class RuntimeSCAServiceBindingProvider implements EndpointAsyncProvider, OptimisingBindingProvider {
private RuntimeEndpoint endpoint;
private RuntimeComponentService service;
private ServiceBindingProvider distributedProvider;
private SCABindingMapper scaBindingMapper;
public RuntimeSCAServiceBindingProvider(ExtensionPointRegistry extensionPoints, RuntimeEndpoint endpoint) {
this.endpoint = endpoint;
this.service = (RuntimeComponentService)endpoint.getService();
UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
this.scaBindingMapper = utilities.getUtility(SCABindingMapper.class);
// if there is potentially a wire to this service that crosses the node boundary
// then we need to create a remote endpoint
if (service.getInterfaceContract().getInterface().isRemotable()) {
if (scaBindingMapper.isRemotable(endpoint)) {
distributedProvider = new DelegatingSCAServiceBindingProvider(endpoint, scaBindingMapper);
}
}
}
/*
protected boolean isDistributed(ExtensionPointRegistry extensionPoints, Endpoint endpoint) {
// find if the node config is for distributed endpoints
// TODO: temp, need a much better way to do this
DomainRegistryFactory domainRegistryFactory = ExtensibleDomainRegistryFactory.getInstance(extensionPoints);
Collection<EndpointRegistry> eprs = domainRegistryFactory.getEndpointRegistries();
if (eprs.size() > 0) {
String eprName = eprs.iterator().next().getClass().getName();
return !eprName.equals("org.apache.tuscany.sca.core.assembly.impl.EndpointRegistryImpl");
}
return false;
}
*/
public InterfaceContract getBindingInterfaceContract() {
if (distributedProvider != null) {
return distributedProvider.getBindingInterfaceContract();
} else {
return endpoint.getComponentTypeServiceInterfaceContract();
}
}
public boolean supportsOneWayInvocation() {
if (distributedProvider != null) {
return distributedProvider.supportsOneWayInvocation();
}
return false;
}
public void start() {
if (distributedProvider != null) {
distributedProvider.start();
}
}
public void stop() {
endpoint.getBinding().setURI(null);
if (distributedProvider != null) {
distributedProvider.stop();
}
}
public void configure() {
// TODO Auto-generated method stub
}
public boolean supportsNativeAsync() {
return true;
}
public InvokerAsyncResponse createAsyncResponseInvoker() {
return new SCABindingAsyncResponseInvoker(null, null);
}
/**
* Handles the optimisation for the service side chain, which provides a mechanism for direct local
* invocation of the service in cases where the component reference is in the same JVM as the
* component service. Effectively, this means skipping any Remote Binding listener and its associated
* binding chain and data binding processors.
*
* This means inserting a SCABindingLocalInvocationInterceptor into the chains for the Endpoint,
* which is placed immediately before the Policy processors (and after any Databinding processors)
*/
public void optimiseBinding(RuntimeEndpoint ep) {
// To optimise, place an SCA binding Local Invocation interceptor at the start of the POLICY phase
// of the service chain...
for (InvocationChain chain : ep.getInvocationChains()) {
chain.addHeadInterceptor( Phase.SERVICE_POLICY, new SCABindingLocalInvocationInterceptor() );
} // end for
} // end method optimiseBinding
} // end class RuntimeSCAServiceBinding
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