第二期 作业一：使用 SOFAJRAFT 实现状态机

[mercyblitz]

内容

1. （必须）补充官方 exmaple ElectionBootstrap 增加 Follower 节点日志信息，参考 Leader 事件实现
2. （可选）补充官方 exmaple counter 增加 CounterOperation 的操作符，比如 DECREMENT，实现 decrementAndGet 方法，类似于 Atomic 类

[liqi19950722]

https://github.com/liqi19950722/Work/tree/master/work-2-01

[Kurok1]

https://github.com/Kurok1/java-training-camp/commit/9489d114d254402e1a304b68823e27e9dbe67feb

[z-ak-z]

第一题: https://github.com/z-ak-z/sofa-jraft-learning/commit/d048b6c33b6edb1775c00b7fe3c155356c1be4e0 看日志，2个节点启动后，就选主成功了。

[ElectionBootstrap] Leader's ip is: 127.0.0.1, port: 8083
[ElectionBootstrap] Leader start on term: 7
[ElectionBootstrap] listAlivePeers: [127.0.0.1:8082, 127.0.0.1:8083]
[ElectionBootstrap] listLearners: []
[ElectionBootstrap] listAliveLearners: []
[ElectionBootstrap] followerPeers: [127.0.0.1:8082]

第二题： https://github.com/z-ak-z/sofa-jraft-learning/commit/4ad5ecbeaf639ae12d0014da4add4ef5ca4d1989#diff-8999f7a701872fb40e5d2446a0c99495633ead4a8dcbb0b6dcbd145dedad8f86

题外话：IncrementAndGetRequest传入负数的delta，达到的效果就是decrementAndGet

[xiaozhimingjava]

https://github.com/xiaozhimingjava/sofa-jraft/tree/work201