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Merged
pull merged 4 commits into from
Jul 31, 2021
+5 −4
Merged

[pull] master from Snailclimb:master #166

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08e97e8
Update zookeeper-intro.md
booogu Jul 29, 2021
bfa4f78
Java 8 新特性 例子小错误修改
foreverlwx Jul 29, 2021
6020bca
Merge pull request #1297 from booogu/patch-1
Snailclimb Jul 31, 2021
dec1fe6
Merge pull request #1298 from foreverlwx/patch-0
Snailclimb Jul 31, 2021
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5 changes: 3 additions & 2 deletions docs/java/new-features/java8-common-new-features.md
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Original file line number Diff line number Diff line change
Expand Up @@ -176,7 +176,7 @@ public interface Runnable{}

```java
@FunctionalInterface
public interface LambdaFunctionalInterface {
public interface LambdaInterface {
void f();
}
//使用
Expand Down Expand Up @@ -221,7 +221,7 @@ public class LambdaClassSuper {
}
}

public class LambdaClass {
public class LambdaClass extends LambdaClassSuper {
public static LambdaInterface staticF() {
return null;
}
Expand All @@ -243,6 +243,7 @@ public class LambdaClass {

//4. 构造方法调用
LambdaInterface tt = LambdaClassSuper::new;
}
}
```

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4 changes: 2 additions & 2 deletions docs/system-design/distributed-system/zookeeper/zookeeper-intro.md
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Expand Up @@ -235,8 +235,8 @@ ZooKeeper 集群中的所有机器通过一个 **Leader 选举过程** 来选定
| 角色 | 说明 |
| -------- | ------------------------------------------------------------ |
| Leader | 为客户端提供读和写的服务，负责投票的发起和决议，更新系统状态。 |
| Follower | 为客户端提供读服务，如果是写服务则转发给 Leader。在选举过程中参与投票。 |
| Observer | 为客户端提供读服务器，如果是写服务则转发给 Leader。不参与选举过程中的投票，也不参与“过半写成功”策略。在不影响写性能的情况下提升集群的读性能。此角色于 ZooKeeper3.3 系列新增的角色。 |
| Follower | 为客户端提供读服务，如果是写服务则转发给 Leader。参与选举过程中的投票。 |
| Observer | 为客户端提供读服务，如果是写服务则转发给 Leader。不参与选举过程中的投票，也不参与“过半写成功”策略。在不影响写性能的情况下提升集群的读性能。此角色于 ZooKeeper3.3 系列新增的角色。 |

当 Leader 服务器出现网络中断、崩溃退出与重启等异常情况时，就会进入 Leader 选举过程，这个过程会选举产生新的 Leader 服务器。

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