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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.net.URI;
import java.util.Collection;
import org.apache.tuscany.sca.assembly.DistributedSCABinding;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.SCABinding;
import org.apache.tuscany.sca.assembly.SCABindingFactory;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.provider.BindingProviderFactory;
import org.apache.tuscany.sca.provider.ProviderFactoryExtensionPoint;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.DomainRegistryFactory;
import org.apache.tuscany.sca.runtime.EndpointRegistry;
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 ServiceBindingProvider {
private RuntimeEndpoint endpoint;
private RuntimeComponentService service;
private SCABinding binding;
private BindingProviderFactory<DistributedSCABinding> distributedProviderFactory;
private ServiceBindingProvider distributedProvider;
private DistributedSCABinding distributedBinding;
public RuntimeSCAServiceBindingProvider(ExtensionPointRegistry extensionPoints, RuntimeEndpoint endpoint) {
this.endpoint = endpoint;
this.service = (RuntimeComponentService)endpoint.getService();
this.binding = (SCABinding)endpoint.getBinding();
// 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()) {
// look to see if a distributed SCA binding implementation has
// been included on the classpath. This will be needed by the
// provider itself to do it's thing
ProviderFactoryExtensionPoint factoryExtensionPoint =
extensionPoints.getExtensionPoint(ProviderFactoryExtensionPoint.class);
distributedProviderFactory =
(BindingProviderFactory<DistributedSCABinding>)factoryExtensionPoint
.getProviderFactory(DistributedSCABinding.class);
if (isDistributed(extensionPoints, endpoint)) {
SCABindingFactory scaBindingFactory =
extensionPoints.getExtensionPoint(FactoryExtensionPoint.class).getFactory(SCABindingFactory.class);
// create a nested provider to handle the remote case
distributedBinding = scaBindingFactory.createDistributedSCABinding();
distributedBinding.setSCABinding(binding);
// create a copy of the endpoint and change the binding
RuntimeEndpoint ep = null;
try {
ep = (RuntimeEndpoint)endpoint.clone();
} catch (Exception ex) {
// we know we can clone endpoint
}
ep.setBinding(distributedBinding);
distributedProvider =
distributedProviderFactory.createServiceBindingProvider(ep);
}
}
}
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
if (distributedProviderFactory != null) {
UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
DomainRegistryFactory domainRegistryFactory = utilities.getUtility(DomainRegistryFactory.class);
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() {
return false;
}
public void start() {
if (distributedProvider != null) {
distributedProvider.start();
}
}
public void stop() {
if (distributedProvider != null) {
distributedProvider.stop();
}
if (distributedBinding != null) {
// reset the binding URI to null so that if the composite containing the component
// with the service/binding is restarted the binding will have the correct URI set
SCABinding scaBinding = distributedBinding.getSCABinding();
try {
URI tempURI = new URI(scaBinding.getURI());
if (!tempURI.isAbsolute()){
scaBinding.setURI(null);
}
} catch (Exception ex){
scaBinding.setURI(null);
}
}
}
}
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