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README
MulanPSL-2.0

JAVA 简单数据同步(传输)框架

背景

A服务(称为上游服务)推送了数据过来后,需要服务转发数据给B,C,D(称为下游服务)。上游服务发送成功后就不关心这个数据了,因此需要本服务保证下游服务都能够收到这些数据。

但是下游服务中的任一个任何时刻都有可能出现问题,比如网络不通,服务停机维护等。所以需要本服务在提供转发数据的同时,尽可能减少其他服务的影响(B停机不影响C和D的转发),所以需要并行分发,同时提供重试机制。

原理

  1. 通过 putData 方法同步接收数据并持久化,保证接收数据这个地方是可靠的,如果这个地方出现问题,需要上游服务提供重试机制
  2. 每个 DataSync 实例内部都有一个线程进行数据处理,start 之后,此线程就不断查询同步状态记录,将最后同步的一条记录的id作为查询条件,查询新的一条数据并返回给内部处理
  3. 内部调用用户数据处理接口,用户需要实现 UserDataHandler 接口
  4. 如果 UserDataHandler 成功,应该返回 NEXT 代表处理下一条数据;否则应该返回 RETRY,不建议返回异常,异常信息最好用户自己处理完成后根据业务选择返回结果
  5. 根据用户返回结果处理,如果是 NEXT 保存最后一条记录状态,继续处理下一条数据;如果非NEXT,sleep 3s 重试

底层数据存储支持:

  • mongodb
  • mysql
  • redis
  • elasticsearch
  • kafka
  • rabbitmq
  • zookeeper
  • ... 需要自行实现api接口

使用方式

添加依赖

<dependency>
  <groupId>cloud.uke.jds</groupId>
  <artifactId>mongodb-provider</artifactId>
  <version>1.0.0-SNAPSHOT</version>
</dependency>

尝鲜版需要加入snapshot仓库

<repositories>
    <repository>
      <id>sonatype-snapshot</id>
      <url>https://s01.oss.sonatype.org/content/repositories/snapshots/</url>
    </repository>
</repositories>
DataSyncBuilder<Student, ObjectId> builder = DataSync.builder();
builder.setInternalStoreDataHandler(new MongoInternalStoreDataHandlerImpl<>(mongoTemplate));
builder.setUserDataHandler(
    student -> {
      System.out.println("同步数据:" + student);
      return SyncResult.NEXT;
    });
builder.setSrcId(src);
builder.setTargetId(target);
DataSync<Student, ObjectId> dataSync = builder.build();
dataSync.start();

参见测试用例 DataSyncMongoProviderTest

方法介绍

  • start 启动数据同步
  • pause 暂停数据同步
  • stop 停止数据同步(此实例无法再次使用,需要重新实例化)
  • veryDangerOperationCleanAllData 删除 src 相关的原始数据,并删除src和target相关的同步状态,注意这个是非常危险的操作,数据不可恢复,所以弄了个这么长的名字以此引起你的注意
  • putData 同步记录新增的数据进行持久化
木兰宽松许可证, 第2版 木兰宽松许可证, 第2版 2020年1月 http://license.coscl.org.cn/MulanPSL2 您对“软件”的复制、使用、修改及分发受木兰宽松许可证,第2版(“本许可证”)的如下条款的约束: 0. 定义 “软件”是指由“贡献”构成的许可在“本许可证”下的程序和相关文档的集合。 “贡献”是指由任一“贡献者”许可在“本许可证”下的受版权法保护的作品。 “贡献者”是指将受版权法保护的作品许可在“本许可证”下的自然人或“法人实体”。 “法人实体”是指提交贡献的机构及其“关联实体”。 “关联实体”是指,对“本许可证”下的行为方而言,控制、受控制或与其共同受控制的机构,此处的控制是指有受控方或共同受控方至少50%直接或间接的投票权、资金或其他有价证券。 1. 授予版权许可 每个“贡献者”根据“本许可证”授予您永久性的、全球性的、免费的、非独占的、不可撤销的版权许可,您可以复制、使用、修改、分发其“贡献”,不论修改与否。 2. 授予专利许可 每个“贡献者”根据“本许可证”授予您永久性的、全球性的、免费的、非独占的、不可撤销的(根据本条规定撤销除外)专利许可,供您制造、委托制造、使用、许诺销售、销售、进口其“贡献”或以其他方式转移其“贡献”。前述专利许可仅限于“贡献者”现在或将来拥有或控制的其“贡献”本身或其“贡献”与许可“贡献”时的“软件”结合而将必然会侵犯的专利权利要求,不包括对“贡献”的修改或包含“贡献”的其他结合。如果您或您的“关联实体”直接或间接地,就“软件”或其中的“贡献”对任何人发起专利侵权诉讼(包括反诉或交叉诉讼)或其他专利维权行动,指控其侵犯专利权,则“本许可证”授予您对“软件”的专利许可自您提起诉讼或发起维权行动之日终止。 3. 无商标许可 “本许可证”不提供对“贡献者”的商品名称、商标、服务标志或产品名称的商标许可,但您为满足第4条规定的声明义务而必须使用除外。 4. 分发限制 您可以在任何媒介中将“软件”以源程序形式或可执行形式重新分发,不论修改与否,但您必须向接收者提供“本许可证”的副本,并保留“软件”中的版权、商标、专利及免责声明。 5. 免责声明与责任限制 “软件”及其中的“贡献”在提供时不带任何明示或默示的担保。在任何情况下,“贡献者”或版权所有者不对任何人因使用“软件”或其中的“贡献”而引发的任何直接或间接损失承担责任,不论因何种原因导致或者基于何种法律理论,即使其曾被建议有此种损失的可能性。 6. 语言 “本许可证”以中英文双语表述,中英文版本具有同等法律效力。如果中英文版本存在任何冲突不一致,以中文版为准。 条款结束 如何将木兰宽松许可证,第2版,应用到您的软件 如果您希望将木兰宽松许可证,第2版,应用到您的新软件,为了方便接收者查阅,建议您完成如下三步: 1, 请您补充如下声明中的空白,包括软件名、软件的首次发表年份以及您作为版权人的名字; 2, 请您在软件包的一级目录下创建以“LICENSE”为名的文件,将整个许可证文本放入该文件中; 3, 请将如下声明文本放入每个源文件的头部注释中。 Copyright (c) [Year] [name of copyright holder] [Software Name] is licensed under Mulan PSL v2. You can use this software according to the terms and conditions of the Mulan PSL v2. You may obtain a copy of Mulan PSL v2 at: http://license.coscl.org.cn/MulanPSL2 THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. See the Mulan PSL v2 for more details. Mulan Permissive Software License,Version 2 Mulan Permissive Software License,Version 2 (Mulan PSL v2) January 2020 http://license.coscl.org.cn/MulanPSL2 Your reproduction, use, modification and distribution of the Software shall be subject to Mulan PSL v2 (this License) with the following terms and conditions: 0. Definition Software means the program and related documents which are licensed under this License and comprise all Contribution(s). Contribution means the copyrightable work licensed by a particular Contributor under this License. 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简介

java data sync, java 数据同步/分发框架,支持重试策略 展开 收起
Java 等 2 种语言
MulanPSL-2.0
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