diff options
Diffstat (limited to 'tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org')
6 files changed, 640 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RemoteBindingHelper.java b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RemoteBindingHelper.java new file mode 100644 index 0000000000..29c5374d51 --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RemoteBindingHelper.java @@ -0,0 +1,43 @@ +/*
+ * 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;
+
+/**
+ * TODO: TUSCANY-2578, implement a pluggable mechanism so sca binding impls can
+ * add their own code to the decision on whether or not to use
+ * the remote binding provider.
+ */
+public class RemoteBindingHelper {
+
+ private static boolean alwaysRemote;
+ static {
+ try {
+ Class.forName("org.apache.tuscany.sca.binding.sca.jms.JMSSCABindingProviderFactory");
+ alwaysRemote = true;
+ } catch (ClassNotFoundException e) {
+ alwaysRemote = false;
+ }
+ }
+
+ public static boolean isTargetRemote() {
+ return alwaysRemote;
+ }
+
+}
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCABindingProvider.java b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCABindingProvider.java new file mode 100644 index 0000000000..c4daa7c727 --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCABindingProvider.java @@ -0,0 +1,61 @@ +/* + * 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 org.apache.tuscany.sca.assembly.SCABinding; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.provider.ReferenceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; + +/** + * The local SCA Binding provider implementation. It is not currently used. + * + * @version $Rev$ $Date$ + */ +public class RuntimeSCABindingProvider implements ReferenceBindingProvider { + + private RuntimeComponentReference reference; + + public RuntimeSCABindingProvider(RuntimeComponent component, RuntimeComponentReference reference, SCABinding binding) { + this.reference = reference; + } + + public InterfaceContract getBindingInterfaceContract() { + return reference.getInterfaceContract(); + } + + public Invoker createInvoker(Operation operation) { + return null; + } + + public void start() { + } + + public void stop() { + } + + public boolean supportsOneWayInvocation() { + return false; + } + +} diff --git a/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCABindingProviderFactory.java b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCABindingProviderFactory.java new file mode 100644 index 0000000000..5d1b3ca399 --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCABindingProviderFactory.java @@ -0,0 +1,61 @@ +/* + * 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 org.apache.tuscany.sca.assembly.SCABinding; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.provider.BindingProviderFactory; +import org.apache.tuscany.sca.provider.ReferenceBindingProvider; +import org.apache.tuscany.sca.provider.ServiceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; + +/** + * The factory for creating SCA Binding providers + * + * @version $Rev$ $Date$ + */ +public class RuntimeSCABindingProviderFactory implements BindingProviderFactory<SCABinding> { + + private ExtensionPointRegistry extensionPoints; + + public RuntimeSCABindingProviderFactory(ExtensionPointRegistry extensionPoints) { + this.extensionPoints = extensionPoints; + + } + + public ReferenceBindingProvider createReferenceBindingProvider(RuntimeComponent component, + RuntimeComponentReference reference, + SCABinding binding) { + + return new RuntimeSCAReferenceBindingProvider(extensionPoints, component, reference, binding); + } + + public ServiceBindingProvider createServiceBindingProvider(RuntimeComponent component, + RuntimeComponentService service, + SCABinding binding) { + return new RuntimeSCAServiceBindingProvider(extensionPoints, component, service, binding); + } + + public Class<SCABinding> getModelType() { + return SCABinding.class; + } +} diff --git a/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCAReferenceBindingProvider.java b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCAReferenceBindingProvider.java new file mode 100644 index 0000000000..d0d5d34d80 --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCAReferenceBindingProvider.java @@ -0,0 +1,246 @@ +/* + * 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.logging.Logger; + +import org.apache.tuscany.sca.assembly.DistributedSCABinding; +import org.apache.tuscany.sca.assembly.Endpoint; +import org.apache.tuscany.sca.assembly.EndpointReference; +import org.apache.tuscany.sca.assembly.OptimizableBinding; +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.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.provider.BindingProviderFactory; +import org.apache.tuscany.sca.provider.ProviderFactoryExtensionPoint; +import org.apache.tuscany.sca.provider.ReferenceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.runtime.RuntimeWire; +import org.oasisopen.sca.ServiceUnavailableException; + +/** + * The sca reference 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 (because a + * reference target can't be resolved in the current model) this binding will + * try and create a remote connection to it + * + * @version $Rev$ $Date$ + */ +public class RuntimeSCAReferenceBindingProvider implements ReferenceBindingProvider { + + private static final Logger logger = Logger.getLogger(RuntimeSCAReferenceBindingProvider.class.getName()); + + private RuntimeComponent component; + private RuntimeComponentReference reference; + private SCABinding binding; + private boolean started = false; + + private BindingProviderFactory<DistributedSCABinding> distributedProviderFactory = null; + private ReferenceBindingProvider distributedProvider = null; + private SCABindingFactory scaBindingFactory; + + public RuntimeSCAReferenceBindingProvider(ExtensionPointRegistry extensionPoints, + RuntimeComponent component, + RuntimeComponentReference reference, + SCABinding binding) { + this.component = component; + this.reference = reference; + this.binding = binding; + this.scaBindingFactory = + extensionPoints.getExtensionPoint(FactoryExtensionPoint.class).getFactory(SCABindingFactory.class); + + // 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); + + } + + public boolean isTargetRemote() { + boolean targetIsRemote = false; + + // first look at the target service and see if this has been resolved + OptimizableBinding optimizableBinding = (OptimizableBinding)binding; + + // The decision is based on the results of the wiring process in the assembly model + // The SCA binding is used to represent unresolved reference targets, i.e. those + // reference targets that need resolving at run time. We can tell by lookin if the + // service to which this binding refers is resolved or not. + // + // TODO - When a callback is in operation. A callback reference bindings sometimes has to + // act as though there is a local wire and sometimes as if there is a remote wire + // what are the implications of this here? + + if (RemoteBindingHelper.isTargetRemote()) { + if (reference.getInterfaceContract() != null) { + targetIsRemote = reference.getInterfaceContract().getInterface().isRemotable(); + } else { + targetIsRemote = true; + } + } else if (optimizableBinding.getTargetComponentService() != null) { + if (optimizableBinding.getTargetComponentService().isUnresolved() == true) { + targetIsRemote = true; + } else { + targetIsRemote = false; + } + } else { + // the case where the wire is specified by URI, e.g. callbacks or user specified bindings, and + // look at the provided URI to decide whether it is a local or remote case + try { + if (binding.getURI() != null) { + URI uri = new URI(binding.getURI()); + if (uri.isAbsolute()) { + targetIsRemote = true; + } else { + targetIsRemote = false; + } + } else { + targetIsRemote = false; + } + } catch (Exception ex) { + targetIsRemote = false; + } + } + return targetIsRemote; + } + + private ReferenceBindingProvider getDistributedProvider() { + + if (isTargetRemote()) { + // initialize the remote provider if it hasn't been done already + if (distributedProvider == null) { + if (reference.getInterfaceContract() != null && !reference.getInterfaceContract().getInterface().isRemotable()) { + throw new IllegalStateException("Reference interface not remotable for component: " + component + .getName() + + " and reference: " + + reference.getName()); + } + + if (distributedProviderFactory == null) { + throw new IllegalStateException("No distributed SCA binding available for component: " + component + .getName() + + " and reference: " + + reference.getName()); + } + + // create the remote provider + DistributedSCABinding distributedBinding = scaBindingFactory.createDistributedSCABinding(); + distributedBinding.setSCABinding(binding); + + distributedProvider = + distributedProviderFactory.createReferenceBindingProvider(component, reference, distributedBinding); + } + } + + return distributedProvider; + } + + public InterfaceContract getBindingInterfaceContract() { + if (isTargetRemote()) { + return getDistributedProvider().getBindingInterfaceContract(); + } else { + if (reference.getReference() != null) { + return reference.getReference().getInterfaceContract(); + } else { + return reference.getInterfaceContract(); + } + } + } + + public boolean supportsOneWayInvocation() { + if (isTargetRemote()) { + return getDistributedProvider().supportsOneWayInvocation(); + } else { + return false; + } + } + + private Invoker getInvoker(RuntimeWire wire, Operation operation) { + Endpoint target = wire.getEndpoint(); + if (target != null) { + RuntimeComponentService service = (RuntimeComponentService)target.getService(); + if (service != null) { // not a callback wire + SCABinding scaBinding = service.getBinding(SCABinding.class); + InvocationChain chain = + service.getInvocationChain(scaBinding, wire.getEndpointReference().getInterfaceContract(), operation); + return chain == null ? null : new SCABindingInvoker(chain); + } + } + return null; + } + + public Invoker createInvoker(Operation operation) { + if (isTargetRemote()) { + return getDistributedProvider().createInvoker(operation); + } else { + RuntimeWire wire = reference.getRuntimeWire(binding); + Invoker invoker = getInvoker(wire, operation); + if (invoker == null) { + throw new ServiceUnavailableException("Unable to create SCA binding invoker for local target " + component.getName() + + " reference " + + reference.getName() + + " (bindingURI=" + + binding.getURI() + + " operation=" + + operation.getName() + + ")" ); + } + return invoker; + } + } + + public void start() { + if (started) { + return; + } else { + started = true; + } + + if (getDistributedProvider() != null) { + distributedProvider.start(); + } + } + + public void stop() { + if (!started) { + return; + } else { + started = false; + } + + if (getDistributedProvider() != null) { + distributedProvider.stop(); + } + } + +} diff --git a/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCAServiceBindingProvider.java b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCAServiceBindingProvider.java new file mode 100644 index 0000000000..6852bcaab0 --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/RuntimeSCAServiceBindingProvider.java @@ -0,0 +1,158 @@ +/* + * 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 org.apache.tuscany.sca.assembly.DistributedSCABinding; +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.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.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; + +/** + * 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 RuntimeComponentService service; + private BindingProviderFactory<DistributedSCABinding> distributedProviderFactory; + private ServiceBindingProvider distributedProvider; + private DistributedSCABinding distributedBinding; + + public RuntimeSCAServiceBindingProvider(ExtensionPointRegistry extensionPoints, + RuntimeComponent component, + RuntimeComponentService service, + SCABinding binding) { + this.service = service; + // if there is potentially a wire to this service that crosses the node boundary + 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); + + // Check the things that will generally be required to set up a + // distributed sca domain reference provider. I.e. make sure that we have a + // - distributed implementation of the sca binding available + // - remotable interface on the service + if (distributedProviderFactory != null) { + + URI serviceURI = null; + try { + serviceURI = new URI(binding.getURI()); + } catch(Exception ex) { + + } + + if (RemoteBindingHelper.isTargetRemote() || ((serviceURI != null) && (serviceURI.isAbsolute()))) { + SCABindingFactory scaBindingFactory = + extensionPoints.getExtensionPoint(FactoryExtensionPoint.class).getFactory(SCABindingFactory.class); + + // create a nested provider to handle the remote case + distributedBinding = scaBindingFactory.createDistributedSCABinding(); + distributedBinding.setSCABinding(binding); + + distributedProvider = + distributedProviderFactory.createServiceBindingProvider(component, service, distributedBinding); + + + } else { + /* do nothing at the moment as only apps using the node implementation + * will currently have the distributed domain set. + * + throw new IllegalStateException("No distributed domain available for component: "+ + component.getName() + + " and service: " + + service.getName()); + */ + } + } else { + /* do nothing at the moment as all services with remotable interfaces + * are marked as remote + throw new IllegalStateException("No distributed SCA binding available for component: "+ + component.getName() + + " and service: " + + service.getName()); + */ + } + } + } + + public InterfaceContract getBindingInterfaceContract() { + if (distributedProvider != null) { + return distributedProvider.getBindingInterfaceContract(); + } else { + if (service.getService() != null) { + return service.getService().getInterfaceContract(); + } else { + return service.getInterfaceContract(); + } + } + } + + 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); + } + } + + } + +} diff --git a/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingInvoker.java b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingInvoker.java new file mode 100644 index 0000000000..613c75d9bf --- /dev/null +++ b/tags/java/sca/2.0-M3-RC3a/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingInvoker.java @@ -0,0 +1,71 @@ +/* + * 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 org.apache.tuscany.sca.invocation.Interceptor; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.invocation.DataExchangeSemantics; + +/** + * @version $Rev$ $Date$ + */ +public class SCABindingInvoker implements Interceptor, DataExchangeSemantics { + private InvocationChain chain; + + /** + * Construct a SCABindingInvoker that delegates to the service invocaiton chain + * @param chain + */ + public SCABindingInvoker(InvocationChain chain) { + super(); + this.chain = chain; + } + + /** + * @see org.apache.tuscany.sca.invocation.Interceptor#getNext() + */ + public Invoker getNext() { + return chain.getHeadInvoker(); + } + + /** + * @see org.apache.tuscany.sca.invocation.Interceptor#setNext(org.apache.tuscany.sca.invocation.Invoker) + */ + public void setNext(Invoker next) { + // NOOP + } + + /** + * @see org.apache.tuscany.sca.invocation.Invoker#invoke(org.apache.tuscany.sca.invocation.Message) + */ + public Message invoke(Message msg) { + return getNext().invoke(msg); + } + + /** + * @see org.apache.tuscany.sca.invocation.DataExchangeSemantics#allowsPassByReference() + */ + public boolean allowsPassByReference() { + return chain.allowsPassByReference(); + } + +} |