| /* |
| * 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.servicecomb.pack.omega.transaction; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.lang.reflect.Method; |
| |
| import javax.transaction.InvalidTransactionException; |
| |
| import org.apache.servicecomb.pack.omega.context.OmegaContext; |
| import org.apache.servicecomb.pack.omega.transaction.annotations.Compensable; |
| import org.aspectj.lang.ProceedingJoinPoint; |
| import org.aspectj.lang.reflect.MethodSignature; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * DefaultRecovery is used to execute business logic once. |
| * The corresponding events will report to alpha server before and after the execution of business logic. |
| * If there are errors while executing the business logic, a TxAbortedEvent will be reported to alpha. |
| * |
| * pre post |
| * request --------- 2.business logic --------- response |
| * \ | |
| * 1.TxStartedEvent \ | 3.TxEndedEvent |
| * \ | |
| * ---------------------- |
| * alpha |
| */ |
| public class DefaultRecovery extends AbstractRecoveryPolicy { |
| private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @Override |
| public Object applyTo(ProceedingJoinPoint joinPoint, Compensable compensable, CompensableInterceptor interceptor, |
| OmegaContext context, String parentTxId, int retries) throws Throwable { |
| Method method = ((MethodSignature) joinPoint.getSignature()).getMethod(); |
| LOG.debug("Intercepting compensable method {} with context {}", method.toString(), context); |
| |
| String compensationSignature = |
| compensable.compensationMethod().isEmpty() ? "" : compensationMethodSignature(joinPoint, compensable, method); |
| |
| String retrySignature = (retries != 0 || compensationSignature.isEmpty()) ? method.toString() : ""; |
| |
| AlphaResponse response = interceptor.preIntercept(parentTxId, compensationSignature, compensable.timeout(), |
| retrySignature, retries, joinPoint.getArgs()); |
| if (response.aborted()) { |
| String abortedLocalTxId = context.localTxId(); |
| context.setLocalTxId(parentTxId); |
| throw new InvalidTransactionException("Abort sub transaction " + abortedLocalTxId + |
| " because global transaction " + context.globalTxId() + " has already aborted."); |
| } |
| |
| try { |
| Object result = joinPoint.proceed(); |
| interceptor.postIntercept(parentTxId, compensationSignature); |
| |
| return result; |
| } catch (Throwable throwable) { |
| interceptor.onError(parentTxId, compensationSignature, throwable); |
| throw throwable; |
| } |
| } |
| |
| String compensationMethodSignature(ProceedingJoinPoint joinPoint, Compensable compensable, Method method) |
| throws NoSuchMethodException { |
| return joinPoint.getTarget() |
| .getClass() |
| .getDeclaredMethod(compensable.compensationMethod(), method.getParameterTypes()) |
| .toString(); |
| } |
| } |