diff options
Diffstat (limited to 'sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/EndpointBuilderImpl.java')
| -rw-r--r-- | sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/EndpointBuilderImpl.java | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/EndpointBuilderImpl.java b/sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/EndpointBuilderImpl.java new file mode 100644 index 0000000000..aaface154b --- /dev/null +++ b/sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/EndpointBuilderImpl.java @@ -0,0 +1,209 @@ +/* + * 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.ArrayList; +import java.util.List; + +import org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.assembly.Component; +import org.apache.tuscany.sca.assembly.ComponentService; +import org.apache.tuscany.sca.assembly.CompositeService; +import org.apache.tuscany.sca.assembly.Endpoint; +import org.apache.tuscany.sca.assembly.OptimizableBinding; +import org.apache.tuscany.sca.assembly.SCABinding; +import org.apache.tuscany.sca.assembly.builder.EndpointBuilder; +import org.apache.tuscany.sca.monitor.Monitor; +import org.apache.tuscany.sca.monitor.Problem; +import org.apache.tuscany.sca.monitor.Problem.Severity; +import org.apache.tuscany.sca.policy.PolicySet; +import org.apache.tuscany.sca.policy.PolicySubject; + +/** + * A factory for the Endpoint model. + * + * @version $Rev$ $Date$ + */ +public abstract class EndpointBuilderImpl implements EndpointBuilder { + + public EndpointBuilderImpl (){ + } + + private void warning(Monitor monitor, String message, Object model, String... messageParameters) { + if (monitor != null){ + Problem problem = monitor.createProblem(this.getClass().getName(), "assembly-validation-messages", Severity.WARNING, model, message, (Object[])messageParameters); + monitor.problem(problem); + } + } + + private void error(Monitor monitor, String message, Object model, Exception ex) { + if (monitor != null){ + Problem problem = null; + problem = monitor.createProblem(this.getClass().getName(), "assembly-validation-messages", Severity.ERROR, model, message, ex); + monitor.problem(problem); + } + } + + /** + * Resolve an endpoint against the provided target information and the + * set of candidate bindings. + */ + public void build(Endpoint endpoint, Monitor monitor) { + + // If this endpoint is not fully configured then don't try and resolve it + if (endpoint.getTargetComponentService() == null){ + return; + } + + // Does the reference expect callbacks + boolean bidirectional = false; + + if (endpoint.getSourceComponentReference().getInterfaceContract() != null && + endpoint.getSourceComponentReference().getInterfaceContract().getCallbackInterface() != null) { + bidirectional = true; + } + + // if the target service is a promoted service then find the + // service it promotes + if (endpoint.getTargetComponentService().getService() instanceof CompositeService) { + CompositeService compositeService = (CompositeService) endpoint.getTargetComponentService().getService(); + // Find the promoted component service + ComponentService promotedComponentService = ServiceConfigurationUtil.getPromotedComponentService(compositeService); + if (promotedComponentService != null && !promotedComponentService.isUnresolved()) { + endpoint.setTargetComponentService(promotedComponentService); + } + } + + try { + PolicyConfigurationUtil.determineApplicableBindingPolicySets(endpoint.getSourceComponentReference(), + endpoint.getTargetComponentService()); + } catch ( Exception e ) { + error(monitor, "PolicyRelatedException", endpoint, e); + } + + + // Match the binding against the bindings of the target service + Binding resolvedBinding = matchBinding(endpoint.getTargetComponent(), + endpoint.getTargetComponentService(), + endpoint.getCandidateBindings(), + endpoint.getTargetComponentService().getBindings()); + if (resolvedBinding == null) { + warning(monitor, "NoMatchingBinding", + endpoint.getSourceComponentReference(), + endpoint.getSourceComponentReference().getName(), + endpoint.getTargetComponentService().getName()); + } else { + endpoint.setSourceBinding(resolvedBinding); + } + + if (bidirectional) { + Binding resolvedCallbackBinding = matchBinding(endpoint.getTargetComponent(), + endpoint.getTargetComponentService(), + endpoint.getSourceComponentReference().getCallback().getBindings(), + endpoint.getTargetComponentService().getCallback().getBindings()); + if (resolvedBinding == null) { + warning(monitor, "NoMatchingCallbackBinding", + endpoint.getSourceComponentReference(), + endpoint.getSourceComponentReference().getName(), + endpoint.getTargetComponentService().getName()); + } else { + endpoint.setSourceCallbackBinding(resolvedCallbackBinding); + } + } + } + + private boolean hasCompatiblePolicySets(Binding refBinding, Binding svcBinding) { + boolean isCompatible = true; + if ( refBinding instanceof PolicySubject && svcBinding instanceof PolicySubject ) { + //TODO : need to add more compatibility checks at the policy attachment levels + for ( PolicySet svcPolicySet : ((PolicySubject)svcBinding).getPolicySets() ) { + isCompatible = false; + for ( PolicySet refPolicySet : ((PolicySubject)refBinding).getPolicySets() ) { + if ( svcPolicySet.equals(refPolicySet) ) { + isCompatible = true; + break; + } + } + //if there exists no matching policy set in the reference binding + if ( !isCompatible ) { + return isCompatible; + } + } + } + return isCompatible; + } + + + private Binding matchBinding(Component targetComponent, ComponentService targetComponentService, List<Binding> source, List<Binding> target) { + List<Binding> matched = new ArrayList<Binding>(); + // Find the corresponding bindings from the service side + for (Binding binding : source) { + for (Binding serviceBinding : target) { + if (binding.getClass() == serviceBinding.getClass() && + hasCompatiblePolicySets(binding, serviceBinding)) { + + try { + Binding cloned = (Binding)binding.clone(); + + //Customise the binding name to make it unique + // regardless of how many bindings or targets there are + if ( targetComponent != null){ + cloned.setName(binding.getName()); + } else { + cloned.setName(binding.getName()); + } + + // Set the binding URI to the URI of the target service + // that has been matched + if (binding.getURI() == null) { + cloned.setURI(serviceBinding.getURI()); + } + + if (binding instanceof OptimizableBinding) { + OptimizableBinding endpoint = ((OptimizableBinding)cloned); + endpoint.setTargetComponent(targetComponent); + endpoint.setTargetComponentService(targetComponentService); + endpoint.setTargetBinding(serviceBinding); + } + + matched.add(cloned); + break; + } catch (Exception ex) { + // do nothing + } + } + } + } + if (matched.isEmpty()) { + // No matching binding + return null; + } else { + for (Binding binding : matched) { + // If binding.sca is present, use it + if (SCABinding.class.isInstance(binding)) { + return binding; + } + } + // Use the first one + return matched.get(0); + } + } + +} |