feature: Saga annotation

all/pom.xml

@@ -325,6 +325,12 @@
             <version>${project.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.apache.seata</groupId>
+            <artifactId>seata-saga-annotation</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
         <!-- spring  -->
         <dependency>
             <groupId>org.springframework</groupId>

bom/pom.xml

@@ -338,6 +338,11 @@
                 <artifactId>seata-saga-engine-store</artifactId>
                 <version>${project.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.apache.seata</groupId>
+                <artifactId>seata-saga-annotation</artifactId>
+                <version>${project.version}</version>
+            </dependency>
             <dependency>
                 <groupId>org.apache.seata</groupId>
                 <artifactId>seata-sqlparser-core</artifactId>

changes/en-us/2.x.md

@@ -6,6 +6,7 @@ Add changes here for all PR submitted to the 2.x branch.
 - [[#6370](https://github.com/seata/seata/pull/6370)] seata saga decouple spring, optimize architecture.
 - [[#6205](https://github.com/apache/incubator-seata/pull/6205)] mock server
 - [[#6169](https://github.com/apache/incubator-seata/pull/6169)] full support for states in the refactored state machine designer
+- [[#5300](https://github.com/apache/incubator-seata/pull/5300)] support annotation usage in saga mode
 
 ### bugfix:
 - [[#6090](https://github.com/apache/incubator-seata/pull/6090)] fix the TCC aspect exception handling process, do not wrapping the internal call exceptions

changes/zh-cn/2.x.md

@@ -6,6 +6,7 @@
 - [[#6370](https://github.com/seata/seata/pull/6370)] seata saga spring接耦、架构优化。
 - [[#6205](https://github.com/apache/incubator-seata/pull/6205)] 提供mock server
 - [[#6169](https://github.com/apache/incubator-seata/pull/6169)] 支持新版本状态机设计器
+- [[#5300](https://github.com/apache/incubator-seata/pull/5300)] 支持saga模式的注解化使用方式
 
 ### bugfix:
 - [[#6090](https://github.com/apache/incubator-seata/pull/6090)] 修复tcc切面异常处理过程，不对内部调用异常做包装处理，直接向外抛出

compatible/src/main/java/io/seata/rm/tcc/interceptor/TccActionInterceptorHandler.java

@@ -16,6 +16,12 @@
  */
 package io.seata.rm.tcc.interceptor;
 
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
 import io.seata.core.context.RootContext;
 import io.seata.core.model.BranchType;
 import io.seata.rm.tcc.api.TwoPhaseBusinessAction;
@@ -27,12 +33,6 @@
 import org.apache.seata.integration.tx.api.interceptor.TwoPhaseBusinessActionParam;
 import org.slf4j.MDC;
 
-import java.lang.annotation.Annotation;
-import java.lang.reflect.Method;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Set;
-
 import static org.apache.seata.common.Constants.BEAN_NAME_SPRING_FENCE_CONFIG;
 
 public class TccActionInterceptorHandler extends org.apache.seata.rm.tcc.interceptor.TccActionInterceptorHandler {
@@ -91,7 +91,7 @@ protected Object doInvoke(InvocationWrapper invocation) throws Throwable {
     }
 
     private TwoPhaseBusinessAction parseAnnotation(Method methodKey) throws NoSuchMethodException {
-        TwoPhaseBusinessAction result = convertIoSeata(parseAnnotationCache.computeIfAbsent(methodKey, method -> {
+        TwoPhaseBusinessAction result = convertIoSeata((org.apache.seata.rm.tcc.api.TwoPhaseBusinessAction )parseAnnotationCache.computeIfAbsent(methodKey, method -> {
             TwoPhaseBusinessAction businessAction = method.getAnnotation(TwoPhaseBusinessAction.class);
             if (businessAction == null && targetBean.getClass() != null) {
                 Set<Class<?>> interfaceClasses = ReflectionUtil.getInterfaces(targetBean.getClass());

core/src/main/java/org/apache/seata/core/model/BranchType.java

@@ -38,6 +38,11 @@ public enum BranchType {
      */
     SAGA,
 
+    /**
+     * The SAGA_ANNOTATION.
+     */
+    SAGA_ANNOTATION,
+
     /**
      * The XA.
      */

saga/pom.xml

@@ -38,6 +38,7 @@
         <module>seata-saga-rm</module>
         <module>seata-saga-engine-store</module>
         <module>seata-saga-spring</module>
+        <module>seata-saga-annotation</module>
     </modules>
 
     <dependencies>

saga/seata-saga-annotation/pom.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    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.
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>seata-saga</artifactId>
+        <groupId>org.apache.seata</groupId>
+        <version>${revision}</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>seata-saga-annotation</artifactId>
+    <name>seata-saga-annotation ${project.version}</name>
+    <description>saga annotation module for Seata built with Maven</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>seata-tcc</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
+
+</project>

saga/seata-saga-annotation/src/main/java/org/apache/seata/saga/rm/RMHandlerSagaAnnotation.java

@@ -0,0 +1,54 @@
+/*
+ * 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.seata.saga.rm;
+
+
+import org.apache.seata.core.exception.TransactionException;
+import org.apache.seata.core.model.BranchType;
+import org.apache.seata.core.model.ResourceManager;
+import org.apache.seata.core.protocol.transaction.BranchCommitRequest;
+import org.apache.seata.core.protocol.transaction.BranchCommitResponse;
+import org.apache.seata.rm.AbstractRMHandler;
+import org.apache.seata.rm.DefaultResourceManager;
+
+/**
+ * The type Rm handler SAGA_ANNOTATION.
+ */
+public class RMHandlerSagaAnnotation extends AbstractRMHandler {
+
+
+    @Override
+    protected void doBranchCommit(BranchCommitRequest request, BranchCommitResponse response) throws TransactionException {
+        //do nothing, impossible to reach here
+    }
+
+    /**
+     * get SAGA resource manager
+     *
+     * @return the resource manager
+     */
+    @Override
+    protected ResourceManager getResourceManager() {
+        return DefaultResourceManager.get().getResourceManager(BranchType.SAGA_ANNOTATION);
+    }
+
+    @Override
+    public BranchType getBranchType() {
+        return BranchType.SAGA_ANNOTATION;
+    }
+
+}