lxm_library_java/SnowFlake-IdGenerator
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yitter
2021-03-30 11:42:23 +08:00
parent af6c0955e2
commit c08ddab813
5 changed files with 11 additions and 12 deletions
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9
Java/README.md
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@@ -8,22 +8,23 @@ JDK 1.8+
<dependency>
<groupId>com.github.yitter</groupId>
<artifactId>yitter-idgenerator</artifactId>
<version>1.0.2</version>
<version>1.0.3</version>
</dependency>
```
## 调用示例
```
// 全局初始化设置WorkerId，默认最大2^16-1。（初始化过程全局只需一次，且必须最先设置）
// 全局初始化设置WorkerId，默认最大2^16-1，可通过调整 WorkerIdBitLength 增加最大值
IdGeneratorOptions options = new IdGeneratorOptions();
options.WorkerId = 1;
YitIdHelper.setIdGenerator(options);
// 以上初始化过程全局只需一次，且必须最先设置
// 初始化以后，就可以在需要的地方调用方法生成ID。
// 初始化以后，即可在需要生成ID的地方，调用以下方法。
long newId = YitIdHelper.nextId();
```
如果基于DI框架集成，可以参考 YitIdHelper 去管理 IdGenerator 对象，必须使用**单例**模式。
如果基于DI框架集成，可以参考 YitIdHelper 去管理 IdGenerator 对象，须使用**单例**模式。
## options 默认值及说明

2
Java/source/pom.xml
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@@ -6,7 +6,7 @@
<groupId>com.github.yitter</groupId>
<artifactId>yitter-idgenerator</artifactId>
<version>1.0.3-SNAPSHOT</version>
<version>1.0.4-SNAPSHOT</version>
<packaging>jar</packaging>
<name>yitter-idgenerator</name>

2
Java/source/src/main/java/com/github/yitter/contract/IdGeneratorOptions.java
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@@ -51,7 +51,7 @@ public class IdGeneratorOptions {
/**
* 最小序列数（含）
* 默认5，不小于1，不大于MaxSeqNumber
* 默认5，不小于5，不大于MaxSeqNumber
*/
public short MinSeqNumber = 5;

2
Java/source/src/main/java/com/github/yitter/core/SnowWorkerM1.java
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@@ -63,7 +63,7 @@ public class SnowWorkerM1 implements ISnowWorker {
WorkerId = options.WorkerId;
WorkerIdBitLength = options.WorkerIdBitLength == 0 ? 6 : options.WorkerIdBitLength;
SeqBitLength = options.SeqBitLength == 0 ? 6 : options.SeqBitLength;
MaxSeqNumber = options.MaxSeqNumber > 0 ? options.MaxSeqNumber : (int) Math.pow(2, SeqBitLength) - 1;
MaxSeqNumber = options.MaxSeqNumber > 0 ? options.MaxSeqNumber : (1 << SeqBitLength) - 1;
MinSeqNumber = options.MinSeqNumber;
TopOverCostCount = options.TopOverCostCount;
BaseTime = options.BaseTime != 0 ? options.BaseTime : 1582136402000L;

8
Java/source/src/main/java/com/github/yitter/idgen/DefaultIdGenerator.java
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@@ -47,17 +47,15 @@ public class DefaultIdGenerator implements IIdGenerator {
}
int maxValue = maxSeqNumber;
if (options.MinSeqNumber < 1 || options.MinSeqNumber > maxValue) {
throw new IdGeneratorException("MinSeqNumber error. (range:[1, " + maxValue + "]");
if (options.MinSeqNumber < 5 || options.MinSeqNumber > maxValue) {
throw new IdGeneratorException("MinSeqNumber error. (range:[5, " + maxValue + "]");
}
switch (options.Method) {
case 1:
_SnowWorker = new SnowWorkerM1(options);
break;
case 2:
_SnowWorker = new SnowWorkerM2(options);
break;
case 1:
default:
_SnowWorker = new SnowWorkerM1(options);
break;