diff options
Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingConfigurationUtil.java')
| -rw-r--r-- | sca-java-1.x/branches/sca-java-1.6.2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingConfigurationUtil.java | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingConfigurationUtil.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingConfigurationUtil.java new file mode 100644 index 0000000000..2842ae82bb --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingConfigurationUtil.java @@ -0,0 +1,170 @@ +/* + * 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 java.util.Map; + +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.OptimizableBinding; +import org.apache.tuscany.sca.assembly.SCABinding; +import org.apache.tuscany.sca.policy.PolicySet; +import org.apache.tuscany.sca.policy.PolicySetAttachPoint; + +/** + * This class encapsulates utility methods to deal with binding definitions + * + * @version $Rev$ $Date$ + */ +abstract class BindingConfigurationUtil { + private static boolean hasCompatiblePolicySets(Binding refBinding, Binding svcBinding) { + boolean isCompatible = true; + if ( refBinding instanceof PolicySetAttachPoint && svcBinding instanceof PolicySetAttachPoint ) { + //TODO : need to add more compatibility checks at the policy attachment levels + for ( PolicySet svcPolicySet : ((PolicySetAttachPoint)svcBinding).getPolicySets() ) { + isCompatible = false; + for ( PolicySet refPolicySet : ((PolicySetAttachPoint)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; + } + + + static Binding matchBinding(Component targetComponent, ComponentService targetComponentService, + List<Binding> source, List<Binding> target, + Map<Binding, Binding> bindingMap, boolean isCallback) { + 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 { + // If the service binding or callback binding was given a tentative URI by + // constructBindingURI() and the target component is running on a different node + // than the source component, add host/port information to the binding URI + if (bindingMap != null) { + Binding sourceNodeBinding = bindingMap.get(binding); + Binding targetNodeBinding = bindingMap.get(serviceBinding); + if (targetNodeBinding != null + && sourceNodeBinding != null + && targetNodeBinding != sourceNodeBinding) { + if (!isCallback) { + serviceBinding.setURI(targetNodeBinding.getURI() + serviceBinding.getURI()); + bindingMap.remove(serviceBinding); // don't add this again + } else { + binding.setURI(sourceNodeBinding.getURI() + binding.getURI()); + bindingMap.remove(binding); // don't add this again + } + } + } + + 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() + "--" + targetComponent.getName() + ".." + serviceBinding.getName()); + } else { + cloned.setName(binding.getName() + "--" + serviceBinding.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); + } + } + + /** + * Choose a binding for the reference based on the bindings available on the + * service + * + * @param reference The component reference + * @param service The component service + * @return Resolved binding + */ + static Binding resolveBindings(ComponentReference reference, Component component, ComponentService service, + Map<Binding, Binding> bindingMap) { + List<Binding> source = reference.getBindings(); + List<Binding> target = service.getBindings(); + + return matchBinding(component, service, source, target, bindingMap, false); + + } + + + /** + * @param reference + * @param service + * @return + */ + static Binding resolveCallbackBindings(ComponentReference reference, Component component, ComponentService service, + Map<Binding, Binding> bindingMap) { + List<Binding> source = reference.getCallback().getBindings(); + List<Binding> target = service.getCallback().getBindings(); + + return matchBinding(component, service, source, target, bindingMap, true); + } + + +} |