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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.assembly.builder.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Binding;
import org.apache.tuscany.sca.assembly.Component;
import org.apache.tuscany.sca.assembly.ComponentReference;
import org.apache.tuscany.sca.assembly.ComponentService;
import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.assembly.Endpoint2;
import org.apache.tuscany.sca.assembly.EndpointReference2;
import org.apache.tuscany.sca.assembly.Implementation;
import org.apache.tuscany.sca.assembly.Multiplicity;
import org.apache.tuscany.sca.assembly.builder.CompositeBuilder;
import org.apache.tuscany.sca.assembly.builder.CompositeBuilderException;
import org.apache.tuscany.sca.definitions.Definitions;
import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
import org.apache.tuscany.sca.monitor.Monitor;
/**
* A composite builder that creates endpoint reference models.
*
* @version $Rev$ $Date$
*/
public class ComponentReferenceEndpointReferenceBuilderImpl extends BaseBuilderImpl implements CompositeBuilder {
public ComponentReferenceEndpointReferenceBuilderImpl(AssemblyFactory assemblyFactory, InterfaceContractMapper interfaceContractMapper) {
super(assemblyFactory, null, null, null, interfaceContractMapper);
}
public String getID() {
return "org.apache.tuscany.sca.assembly.builder.ComponentReferenceEndpointReferenceBuilder";
}
/**
* Create endpoint references for all component references.
*
* @param composite
*/
public void build(Composite composite, Definitions definitions, Monitor monitor) throws CompositeBuilderException
{
// process top level composite references
// TODO - I don't think OASIS allows for these
//
//processCompositeReferences(composite);
// process component services
processComponentReferences(composite, monitor);
}
private void processCompositeReferences(Composite composite) {
// TODO do we need this for OASIS?
}
private void processComponentReferences(Composite composite, Monitor monitor) {
// index all of the components in the composite
Map<String, Component> components = new HashMap<String, Component>();
indexComponents(composite, components);
// index all of the services in the composite
Map<String, ComponentService> componentServices = new HashMap<String, ComponentService>();
indexServices(composite, componentServices);
// create endpoint references for each component's references
for (Component component : composite.getComponents()) {
// recurse for composite implementations
Implementation implementation = component.getImplementation();
if (implementation instanceof Composite) {
processComponentReferences((Composite)implementation, monitor);
}
// create endpoint references to represent the component reference
for (ComponentReference reference : component.getReferences()) {
createReferenceEndpointReferences(composite, component, reference, components, componentServices, monitor);
}
}
}
private void createReferenceEndpointReferences(Composite composite,
Component component,
ComponentReference reference,
Map<String, Component> components,
Map<String, ComponentService> componentServices,
Monitor monitor)
{
if (reference.getAutowire() == Boolean.TRUE &&
reference.getTargets().isEmpty()) {
// Find suitable targets in the current composite for an
// autowired reference
Multiplicity multiplicity = reference.getMultiplicity();
for (Component targetComponent : composite.getComponents()) {
// prevent autowire connecting to self
boolean skipSelf = false;
for (ComponentReference targetComponentReference : targetComponent.getReferences()) {
if (reference == targetComponentReference) {
skipSelf = true;
}
}
if (!skipSelf) {
for (ComponentService targetComponentService : targetComponent.getServices()) {
if (reference.getInterfaceContract() == null ||
interfaceContractMapper.isCompatible(reference.getInterfaceContract(),
targetComponentService.getInterfaceContract())) {
// create endpoint reference
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setTargetName(targetComponentService.getName());
endpointRef.setUnresolved(false);
// create dummy endpoint. This will be replaced when policies
// are matched and bindings are configured later
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setComponent(targetComponent);
endpoint.setService(targetComponentService);
endpoint.setUnresolved(true);
endpointRef.setTargetEndpoint(endpoint);
reference.getEndpointReferences().add(endpointRef);
if (multiplicity == Multiplicity.ZERO_ONE ||
multiplicity == Multiplicity.ONE_ONE) {
break;
}
}
}
}
}
if (multiplicity == Multiplicity.ONE_N ||
multiplicity == Multiplicity.ONE_ONE) {
if (reference.getEndpointReferences().size() == 0) {
warning(monitor,
"NoComponentReferenceTarget",
reference,
reference.getName());
}
}
} else if (!reference.getTargets().isEmpty()) {
// Check that the component reference does not mix the use of
// endpoint references specified via the target attribute with
// the presence of binding elements
if (reference.getBindings().size() > 0) {
warning(monitor, "ReferenceEndPointMixWithTarget",
composite, reference.getName());
}
// Resolve targets specified on the component reference
for (ComponentService target : reference.getTargets()) {
String targetName = target.getName();
ComponentService targetComponentService = componentServices.get(targetName);
Component targetComponent;
int s = targetName.indexOf('/');
if (s == -1) {
targetComponent = components.get(targetName);
} else {
targetComponent = components.get(targetName.substring(0, s));
}
if (targetComponentService != null) {
// Check that the target component service provides
// a superset of the component reference interface
if (reference.getInterfaceContract() == null ||
interfaceContractMapper.isCompatible(reference.getInterfaceContract(),
targetComponentService.getInterfaceContract())) {
// create endpoint reference
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setTargetName(targetComponentService.getName());
endpointRef.setUnresolved(false);
// create dummy endpoint. This will be replaced when policies
// are matched and bindings are configured later
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setComponent(targetComponent);
endpoint.setService(targetComponentService);
endpoint.setUnresolved(true);
endpointRef.setTargetEndpoint(endpoint);
reference.getEndpointReferences().add(endpointRef);
} else {
warning(monitor,
"ReferenceIncompatibleInterface",
composite,
composite.getName().toString(),
reference.getName(),
targetName);
}
} else {
// add an unresolved endpoint reference
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setTargetName(targetName);
endpointRef.setUnresolved(true);
// create an unresolved endpoint to go with it
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setUnresolved(true);
endpointRef.setTargetEndpoint(endpoint);
warning(monitor,
"ComponentReferenceTargetNotFound",
composite,
composite.getName().toString(),
targetName);
}
}
} else if ((reference.getReference() != null)
&& (!reference.getReference().getTargets().isEmpty())) {
// Resolve targets from the corresponding reference in the
// componentType
for (ComponentService target : reference.getReference().getTargets()) {
String targetName = target.getName();
ComponentService targetComponentService = componentServices.get(targetName);
Component targetComponent;
int s = targetName.indexOf('/');
if (s == -1) {
targetComponent = components.get(targetName);
} else {
targetComponent = components.get(targetName.substring(0, s));
}
if (targetComponentService != null) {
// Check that the target component service provides
// a superset of the component reference interface
if (reference.getInterfaceContract() == null ||
interfaceContractMapper.isCompatible(reference.getInterfaceContract(),
targetComponentService.getInterfaceContract())) {
// create endpoint reference
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setTargetName(targetComponentService.getName());
endpointRef.setUnresolved(false);
// create dummy endpoint. This will be replaced when policies
// are matched and bindings are configured later
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setComponent(targetComponent);
endpoint.setService(targetComponentService);
endpoint.setUnresolved(true);
endpointRef.setTargetEndpoint(endpoint);
reference.getEndpointReferences().add(endpointRef);
} else {
warning(monitor,
"ReferenceIncompatibleInterface",
composite,
composite.getName().toString(),
reference.getName(),
targetName);
}
} else {
// add an unresolved endpoint reference
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setTargetName(targetName);
endpointRef.setUnresolved(true);
// create an unresolved endpoint to go with it
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setUnresolved(true);
endpointRef.setTargetEndpoint(endpoint);
warning(monitor,
"ComponentReferenceTargetNotFound",
composite,
composite.getName().toString(),
targetName);
}
}
}
// if no endpoints have found so far the bindings become targets.
if (reference.getEndpointReferences().isEmpty()) {
for (Binding binding : reference.getBindings()) {
String uri = binding.getURI();
// user hasn't put a uri on the binding so it's not a target
// name
if (uri == null) {
// create endpoint reference for manually configured bindings
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setBinding(binding);
endpointRef.setTargetName(null);
endpointRef.setTargetEndpoint(null);
endpointRef.setUnresolved(false);
// create a resolved endpoint to signify that this
// reference is pointing at some unwired endpoint
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setUnresolved(false);
endpointRef.setTargetEndpoint(endpoint);
reference.getEndpointReferences().add(endpointRef);
continue;
}
// user might have put a local target name in the uri
// see if it refers to a target we know about
// - if it does the reference binding will be matched with a
// service binding
// - if it doesn't it is assumed to be an external reference
Component targetComponent = null;
ComponentService targetComponentService = null;
if (uri.startsWith("/")) {
uri = uri.substring(1);
}
// Resolve the target component and service
targetComponentService = componentServices.get(uri);
int s = uri.indexOf('/');
if (s == -1) {
targetComponent = components.get(uri);
} else {
targetComponent = components.get(uri.substring(0, s));
}
// if the binding URI matches a component in the
// composite then configure an endpoint reference with this component as
// the target. If not then the binding URI will be assumed to reference an
// external service
if (targetComponentService != null) {
// Check that the target component service provides
// a superset of the component reference interface
if (reference.getInterfaceContract() == null ||
interfaceContractMapper.isCompatible(reference.getInterfaceContract(),
targetComponentService.getInterfaceContract())) {
// create enpoint reference
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setBinding(binding);
endpointRef.setTargetName(targetComponentService.getName());
endpointRef.setUnresolved(false);
// create dummy endpoint. This will be replaced when policies
// are matched and bindings are configured later
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setComponent(targetComponent);
endpoint.setService(targetComponentService);
endpoint.setUnresolved(true);
endpointRef.setTargetEndpoint(endpoint);
reference.getEndpointReferences().add(endpointRef);
} else {
warning(monitor,
"ReferenceIncompatibleInterface",
composite,
composite.getName().toString(),
reference.getName(),
uri);
}
} else {
// create endpoint reference for manually configured bindings
EndpointReference2 endpointRef = assemblyFactory.createEndpointReference();
endpointRef.setComponent(component);
endpointRef.setReference(reference);
endpointRef.setBinding(binding);
endpointRef.setTargetName(null);
endpointRef.setTargetEndpoint(null);
endpointRef.setUnresolved(false);
// create a resolved endpoint to signify that this
// reference is pointing at some unwired endpoint
Endpoint2 endpoint = assemblyFactory.createEndpoint();
endpoint.setUnresolved(false);
endpointRef.setTargetEndpoint(endpoint);
reference.getEndpointReferences().add(endpointRef);
}
}
}
}
}
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