其他
百度新开源的分布式 ID 生成器,太强大了!
1、UidGenerator是什么
2、UidGenerator的优势
解决了时钟回调的问题 使用ringbuffer,无锁进行id的生产与消费,速度非常快 适用于多线程,不会有单线程瓶颈
3、整合
<dependency>
<groupId>com.xfvape.uid</groupId>
<artifactId>uid-generator</artifactId>
<version>0.0.4-RELEASE</version>
</dependency>
<dependency>
<groupId>com.xfvape.uid</groupId>
<artifactId>uid-generator</artifactId>
<version>0.0.4-RELEASE</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
</exclusion>
<exclusion>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
<exclusion>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
</exclusion>
<exclusion>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
</exclusion>
</exclusions>
</dependency>
CREATE TABLE WORKER_NODE
(
ID BIGINT NOT NULL AUTO_INCREMENT COMMENT 'auto increment id',
HOST_NAME VARCHAR(64) NOT NULL COMMENT 'host name',
PORT VARCHAR(64) NOT NULL COMMENT 'port',
TYPE INT NOT NULL COMMENT 'node type: ACTUAL or CONTAINER',
LAUNCH_DATE DATE NOT NULL COMMENT 'launch date',
MODIFIED TIMESTAMP NOT NULL COMMENT 'modified time',
CREATED TIMESTAMP NOT NULL COMMENT 'created time',
PRIMARY KEY(ID)
)
COMMENT='DB WorkerID Assigner for UID Generator',ENGINE = INNODB;
set sql_mode="NO_ENGINE_SUBSTITUTION";
@Configuration
public class WorkerNodeConfig {
@Bean("disposableWorkerIdAssigner")
public DisposableWorkerIdAssigner disposableWorkerIdAssigner(){
DisposableWorkerIdAssigner disposableWorkerIdAssigner = new DisposableWorkerIdAssigner();
return disposableWorkerIdAssigner;
}
@Bean("cachedUidGenerator")
public UidGenerator uidGenerator(DisposableWorkerIdAssigner disposableWorkerIdAssigner){
CachedUidGenerator cachedUidGenerator = new CachedUidGenerator();
cachedUidGenerator.setWorkerIdAssigner(disposableWorkerIdAssigner);
return cachedUidGenerator;
}
}
public class DisposableWorkerIdAssigner implements WorkerIdAssigner {
@Resource
private WorkerNodeMapper workerNodeMapper;
@Override
@Transactional
public long assignWorkerId() {
WorkerNode workerNode = buildWorkerNode();
workerNodeMapper.addWorkerNode(workerNode);
return workerNode.getId();
}
private WorkerNode buildWorkerNode() {
WorkerNode workNode = new WorkerNode();
if (DockerUtils.isDocker()) {
workNode.setType(WorkerNodeType.CONTAINER.value());
workNode.setHostName(DockerUtils.getDockerHost());
workNode.setPort(DockerUtils.getDockerPort());
workNode.setLaunchDate(new Date());
} else {
workNode.setType(WorkerNodeType.ACTUAL.value());
workNode.setHostName(NetUtils.getLocalAddress());
workNode.setPort(System.currentTimeMillis() + "-" + RandomUtils.nextInt(100000));
workNode.setLaunchDate(new Date());
}
return workNode;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.uidgenerator.mapper.WorkerNodeMapper">
<resultMap id="BaseResultMap"
type="com.uidgenerator.entity.WorkerNode">
<id column="ID" jdbcType="BIGINT" property="id" />
<result column="HOST_NAME" jdbcType="VARCHAR" property="hostName" />
<result column="PORT" jdbcType="VARCHAR" property="port" />
<result column="TYPE" jdbcType="INTEGER" property="type" />
<result column="LAUNCH_DATE" jdbcType="DATE" property="launchDate" />
<result column="MODIFIED" jdbcType="TIMESTAMP" property="modified" />
<result column="CREATED" jdbcType="TIMESTAMP" property="created" />
</resultMap>
<insert id="addWorkerNode" useGeneratedKeys="true" keyProperty="id"
parameterType="com.uidgenerator.entity.WorkerNode">
INSERT INTO WORKER_NODE
(HOST_NAME,
PORT,
TYPE,
LAUNCH_DATE,
MODIFIED,
CREATED)
VALUES (
#{hostName},
#{port},
#{type},
#{launchDate},
NOW(),
NOW())
</insert>
<select id="getWorkerNodeByHostPort" resultMap="BaseResultMap ">
SELECT
ID,
HOST_NAME,
PORT,
TYPE,
LAUNCH_DATE,
MODIFIED,
CREATED
FROM
WORKER_NODE
WHERE
HOST_NAME = #{host} AND PORT = #{port}
</select>
</mapper>
mybatis:
mapper-locations: classpath:mybatis/*.xml
@Mapper
public interface WorkerNodeMapper {
int addWorkerNode(WorkerNode workerNodeEntity);
WorkerNode getWorkerNodeByHostPort(@Param("host") String host, @Param("port") String port);
}
public interface IWorkerNodeService {
public long genUid();
}
@Service
public class WorkerNodeServiceImpl implements IWorkerNodeService {
@Resource
private UidGenerator uidGenerator;
@Override
public long genUid() {
Long uu_id = UidGeneratorComponent.uu_id;
return uidGenerator.getUID();
}
}
@RestController
public class WorkerNodeServiceController {
@Resource
private IWorkerNodeService workerNodeService;
/**
* 集成百度uid-generator生成id
* @return
*/
@GetMapping("/baidu/uid")
public long baiduUid(){
long uid = workerNodeService.genUid();
return uid;
}
}
往期推荐