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增加IdConstants，提高Snowflake初始化性能

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Looly
2024-05-13 15:52:54 +08:00
parent 8e62f5ce44
commit 422f36b23e
3 changed files with 38 additions and 5 deletions
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9
hutool-core/src/main/java/cn/hutool/core/lang/Snowflake.java
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@@ -1,6 +1,7 @@
package cn.hutool.core.lang;
import cn.hutool.core.date.SystemClock;
import cn.hutool.core.lang.id.IdConstants;
import cn.hutool.core.util.IdUtil;
import cn.hutool.core.util.RandomUtil;
import cn.hutool.core.util.StrUtil;
@@ -48,11 +49,11 @@ public class Snowflake implements Serializable {
private static final long WORKER_ID_BITS = 5L;
// 最大支持机器节点数0~31，一共32个
@SuppressWarnings({"PointlessBitwiseExpression", "FieldCanBeLocal"})
private static final long MAX_WORKER_ID = -1L ^ (-1L << WORKER_ID_BITS);
public static final long MAX_WORKER_ID = -1L ^ (-1L << WORKER_ID_BITS);
private static final long DATA_CENTER_ID_BITS = 5L;
// 最大支持数据中心节点数0~31，一共32个
@SuppressWarnings({"PointlessBitwiseExpression", "FieldCanBeLocal"})
private static final long MAX_DATA_CENTER_ID = -1L ^ (-1L << DATA_CENTER_ID_BITS);
public static final long MAX_DATA_CENTER_ID = -1L ^ (-1L << DATA_CENTER_ID_BITS);
// 序列号12位（表示只允许workId的范围为：0-4095）
private static final long SEQUENCE_BITS = 12L;
// 机器节点左移12位
@@ -93,7 +94,7 @@ public class Snowflake implements Serializable {
* 构造，使用自动生成的工作节点ID和数据中心ID
*/
public Snowflake() {
this(IdUtil.getWorkerId(IdUtil.getDataCenterId(MAX_DATA_CENTER_ID), MAX_WORKER_ID));
this(IdConstants.DEFAULT_WORKER_ID);
}
/**
@@ -102,7 +103,7 @@ public class Snowflake implements Serializable {
* @param workerId 终端ID
*/
public Snowflake(long workerId) {
this(workerId, IdUtil.getDataCenterId(MAX_DATA_CENTER_ID));
this(workerId, IdConstants.DEFAULT_DATACENTER_ID);
}
/**

31
hutool-core/src/main/java/cn/hutool/core/lang/id/IdConstants.java Normal file
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@@ -0,0 +1,31 @@
package cn.hutool.core.lang.id;
import cn.hutool.core.lang.Snowflake;
import cn.hutool.core.util.IdUtil;
/**
* ID相关常量
*
* @author Looly
* @since 5.8.28
*/
public class IdConstants {
/**
* 默认的数据中心ID。
* <p>此常量通过调用{@link IdUtil#getDataCenterId(long)}方法，传入{@link Snowflake#MAX_DATA_CENTER_ID}作为参数，
* 来获取一个默认的数据中心ID。它在系统中作为一个全局配置使用，标识系统默认运行在一个最大数据中心ID限定的环境中。</p>
*
* @see IdUtil#getDataCenterId(long)
* @see Snowflake#MAX_DATA_CENTER_ID
*/
public static final long DEFAULT_DATACENTER_ID = IdUtil.getDataCenterId(Snowflake.MAX_DATA_CENTER_ID);
/**
* 默认的Worker ID生成。
* <p>这个静态常量是通过调用IdUtil的getWorkerId方法，使用默认的数据中心ID和Snowflake算法允许的最大Worker ID来获取的。</p>
*
* @see IdUtil#getWorkerId(long, long) 获取Worker ID的具体实现方法
* @see Snowflake#MAX_WORKER_ID Snowflake算法中定义的最大Worker ID
*/
public static final long DEFAULT_WORKER_ID = IdUtil.getWorkerId(DEFAULT_DATACENTER_ID, Snowflake.MAX_WORKER_ID);
}