# snowflake-utils

**Repository Path**: duanxinyuan/snowflake-utils

## Basic Information

- **Project Name**: snowflake-utils
- **Description**: 雪花Id（分布式Id）算法工具库
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-08
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 雪花Id（分布式Id）算法工具库


## Twitter雪花算法-普通版

Twitter的雪花算法，用于生成分布式Id

### Maven依赖

```xml
<dependency>
    <groupId>com.github.duanxinyuan</groupId>
    <artifactId>util-snowflake</artifactId>
</dependency>
```

* Twitter雪花算法工具类：SnowflakeIdUtils

## <font color=red>Twitter雪花算法-完美版</font>

* **增加了使用Redis分配workerId和datacenterId的逻辑，确保不会重复**
* **最多可以分配32*32=1024个workerId+datacenterId的组合**

### Maven依赖

```xml
<dependency>
    <groupId>com.github.duanxinyuan</groupId>
    <artifactId>util-snowflake-prefect</artifactId>
</dependency>
```

* Twitter雪花算法工具类：SnowflakeIdUtils

### 配置示例

#### properties 配置示例

```properties
#雪花算法模块名
snowflake.module=test
#Redis缓存类型，single/sentinel/sharded/cluster，必须配置
cache.redis.type.snowflake=single
#Redis节点信息列表，多个使用逗号隔开，必须配置
cache.redis.nodes.snowflake=127.0.0.1:6380
#Redis密码，没有密码不需要配置
cache.redis.password.snowflake=123456
```

#### yaml 配置示例

```yaml
snowflake:
    #雪花算法模块名
    module: test
cache:
    redis:
        #Redis缓存类型，single/sentinel/sharded/cluster，必须配置
        type:
            snowflake: single
        #Redis节点信息列表，多个使用逗号隔开，必须配置
        nodes:
            snowflake: 127.0.0.1:6380
        #Redis密码，没有密码不需要配置
        password:
            snowflake: 123456
```

### 使用示例

```java
import com.dxy.library.json.jackson.JacksonUtil;
import com.dxy.library.snowflake.SnowflakeIdUtils;
import org.junit.Test;

import java.time.Clock;
import java.util.List;
import java.util.Map;

/**
 * @author duanxinyuan
 * 2019/1/14 21:54
 */
public class SnowflakeIdUtilsTest {

    @Test
    public void getAllDataCenterWorkerId() {
        Map<String, Map<String, Long>> allDataCenterWorkerId = SnowflakeIdUtils.getAllDataCenterWorkerId();
        System.out.println(JacksonUtil.to(allDataCenterWorkerId));
    }

    @Test
    public void getWorkerId() {
        long workerId = SnowflakeIdUtils.getWorkerId();
        long datacenterId = SnowflakeIdUtils.getDatacenterId();
        System.out.println(workerId);
        System.out.println(datacenterId);
    }

    @Test
    public void testSnowflakeId() {
        System.out.println(SnowflakeIdUtils.getAsLong());
        System.out.println(SnowflakeIdUtils.getAsString());
    }

    @Test
    public void testSnowflakeIdBatch() {
        long start = Clock.systemUTC().millis();
        for (int i = 0; i < 100000; i++) {
            System.out.println(SnowflakeIdUtils.getAsLong());
        }
        System.out.println(Clock.systemUTC().millis() - start);
    }

}
```