TUSCANY-3884 - Convert the default binding to delegate for local calls as well as remote calls. Means that the binding is more consistent in it's layout and the delegation selection logic is more cleanly separated from the code that handles passing messages.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1145118 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 127 insertions, 0 deletions

diff --git a/sca-java-2.x/trunk/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCAReferenceBindingProvider.java b/sca-java-2.x/trunk/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCAReferenceBindingProvider.java
new file mode 100644
index 0000000000..f04b6aeb4c
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCAReferenceBindingProvider.java
@@ -0,0 +1,127 @@
+package org.apache.tuscany.sca.binding.local;

+

+import org.apache.tuscany.sca.assembly.Endpoint;

+import org.apache.tuscany.sca.assembly.Reference;

+import org.apache.tuscany.sca.binding.local.LocalSCABindingInvoker;

+import org.apache.tuscany.sca.core.ExtensionPointRegistry;

+import org.apache.tuscany.sca.core.UtilityExtensionPoint;

+import org.apache.tuscany.sca.databinding.Mediator;

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

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

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

+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.EndpointReferenceAsyncProvider;

+import org.apache.tuscany.sca.provider.SCABindingMapper;

+import org.apache.tuscany.sca.runtime.RuntimeComponentService;

+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;

+import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;

+import org.oasisopen.sca.ServiceUnavailableException;

+

+public class LocalSCAReferenceBindingProvider implements EndpointReferenceAsyncProvider {

+    private RuntimeEndpointReference endpointReference;

+

+    private InterfaceContractMapper interfaceContractMapper;

+    private ExtensionPointRegistry extensionPoints;

+    private Mediator mediator;

+

+    public LocalSCAReferenceBindingProvider(ExtensionPointRegistry extensionPoints, RuntimeEndpointReference endpointReference, SCABindingMapper mapper) {

+        this.extensionPoints = extensionPoints;

+        UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);

+        this.interfaceContractMapper = utilities.getUtility(InterfaceContractMapper.class);

+        this.mediator = utilities.getUtility(Mediator.class);

+

+        this.endpointReference = endpointReference;

+    }

+

+    @Override

+    public InterfaceContract getBindingInterfaceContract() {

+        RuntimeEndpoint endpoint = (RuntimeEndpoint) endpointReference.getTargetEndpoint();

+        if (endpoint != null) {

+            return endpoint.getComponentTypeServiceInterfaceContract();

+        } else {

+            return endpointReference.getComponentTypeReferenceInterfaceContract();

+        }

+    }

+

+    @Override

+    public Invoker createInvoker(Operation operation) {

+        Invoker result = null;

+

+        Endpoint target = endpointReference.getTargetEndpoint();

+        if (target != null) {

+            RuntimeComponentService service = (RuntimeComponentService) target.getService();

+            if (service != null) { // not a callback wire

+                InvocationChain chain = ((RuntimeEndpoint) target).getInvocationChain(operation);

+

+                boolean passByValue = false;

+                Operation targetOp = chain.getTargetOperation();

+                if (!operation.getInterface().isRemotable()) {

+                    if (interfaceContractMapper.isCompatibleByReference(operation, targetOp, Compatibility.SUBSET)) {

+                        passByValue = false;

+                    }

+                } else {

+                    Reference ref = endpointReference.getReference().getReference();

+                    // The spec says both ref and service needs to

+                    // allowsPassByReference

+                    boolean allowsPBR = (endpointReference.getReference().isAllowsPassByReference() || (ref != null && ref.isAllowsPassByReference())) && chain.allowsPassByReference();

+

+                    if (allowsPBR && interfaceContractMapper.isCompatibleByReference(operation, targetOp, Compatibility.SUBSET)) {

+                        passByValue = false;

+                    } else if (interfaceContractMapper.isCompatibleWithoutUnwrapByValue(operation, targetOp, Compatibility.SUBSET)) {

+                        passByValue = true;

+                    }

+                }

+                // it turns out that the chain source and target operations are

+                // the same, and are the operation

+                // from the target, not sure if thats by design or a bug. The

+                // SCA binding invoker needs to know

+                // the source and target class loaders so pass in the real

+                // source operation in the constructor

+                result = chain == null ? null : new LocalSCABindingInvoker(chain, operation, mediator, passByValue, endpointReference, extensionPoints);

+            }

+        }

+

+        if (result == null) {

+            throw new ServiceUnavailableException("Unable to create SCA binding invoker for local target " + endpointReference.getComponent().getName() + " reference "

+                    + endpointReference.getReference().getName() + " (bindingURI=" + endpointReference.getBinding().getURI() + " operation=" + operation.getName() + ")");

+        }

+

+        return result;

+    }

+

+    @Override

+    public boolean supportsOneWayInvocation() {

+        // Default for Local invocation

+        return false;

+    }

+    

+    @Override

+    public boolean supportsNativeAsync() {

+        return true;

+    }

+

+    @Override

+    public void configure() {

+        // Nothing required for Local invocation

+    }

+

+    @Override

+    public void start() {

+        // Nothing required for Local invocation

+    }

+

+    @Override

+    public void stop() {

+        // Nothing required for Local invocation

+    }

+    

+    /**

+     * Allows us to replace the delegate EPR with the real EPR so that the local binding

+     * optimization operates against the correct invocation chains.

+     */

+    public void setEndpointReference(RuntimeEndpointReference endpointReference){

+        this.endpointReference = endpointReference;

+    }

+}