diff options
Diffstat (limited to 'sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInterceptor.java')
-rw-r--r-- | sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInterceptor.java | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInterceptor.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInterceptor.java new file mode 100644 index 0000000000..cf15e54c33 --- /dev/null +++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInterceptor.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.event.impl; + +import java.util.List; + +import org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper; +import org.apache.tuscany.sca.interfacedef.Operation; +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.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.runtime.RuntimeWire; +import org.osoa.sca.annotations.EventType; + +/** + * Policy interceptor for events + * + * @version $$ + */ +public class EventBindingInterceptor implements Interceptor { + private Invoker next; + @SuppressWarnings("unused") + private Operation operation; + private RuntimeComponentService consumerService; + private Binding binding; + private InterfaceContractMapper interfaceContractMapper; + + public EventBindingInterceptor(RuntimeComponentService consumerService, + Binding binding, + Operation operation, + InterfaceContractMapper interfaceContractMapper) { + super(); + this.consumerService = consumerService; + this.operation = operation; + this.binding = binding; + this.interfaceContractMapper = interfaceContractMapper; + } + + public Message invoke(Message msg) { + try { + + Object arg = msg.getBody(); + if (arg instanceof Object[]) { + arg = ((Object [])arg)[0]; + } + + Operation consumerOperation = findOperation(consumerService.getInterfaceContract().getInterface().getOperations(), arg); + + InvocationChain chain = getInvocationChain(consumerService.getRuntimeWire(binding), consumerOperation); + Invoker invoker = chain.getHeadInvoker(); + while (invoker instanceof Interceptor && ((Interceptor)invoker).getNext() != null) { + invoker = ((Interceptor)invoker).getNext(); + } + msg = invoker.invoke(msg); + } catch (Exception e) { + e.printStackTrace(); + msg.setBody(e); + } + return msg; + } + + public Invoker getNext() { + return next; + } + + public void setNext(Invoker next) { + this.next = next; + } + + private String getEventType(Class<?> clazz) { + EventType eventTypeAnnotation = clazz.getAnnotation(EventType.class); + if (eventTypeAnnotation != null) + return eventTypeAnnotation.name(); + if (clazz.getSuperclass() != null && clazz.getSuperclass() != Object.class) { + String eventType = getEventType(clazz.getSuperclass()); + if (eventType != null) + return eventType; + } + for (Class<?> interfaze : clazz.getInterfaces()) { + String eventType = getEventType(interfaze); + if (eventType != null) + return eventType; + } + return null; + } + + @SuppressWarnings("unchecked") + private Operation findOperation(List<Operation> operations, Object arg) { + if (arg == null) { + return operations.get(0); + } + else { + String eventType = getEventType(arg.getClass()); + + Operation firstMatching = null; + for (Operation op : operations) { + String[] eventTypes = op.getEventTypes(); + if (eventTypes == null || eventTypes.length == 0) { + + if (op.getInputType().getLogical().get(0).getPhysical().isAssignableFrom(arg.getClass())) { + + // If no event type is specified, return the first method which + // (1) has assignable parameters + // (2) has no explicit event types specified + if (eventType == null) { + + return op; + } + else if (firstMatching == null) { + // Remember first matching method without event types and + // return this operation if no operation has explicitly specified + // this event type. + firstMatching = op; + } + } + } else { + for (String type : eventTypes) { + if (type.equals(eventType)) { + return op; + } + } + } + + } + return firstMatching; + } + } + + public InvocationChain getInvocationChain(RuntimeWire wire, Operation operation) { + for (InvocationChain chain : wire.getInvocationChains()) { + Operation op = chain.getTargetOperation(); + if (interfaceContractMapper.isCompatible(operation, op, op.getInterface().isRemotable())) { + return chain; + } + } + return null; + } + +} |