icu.easyj.core.sequence.SequenceUtils Maven / Gradle / Ivy
/*
* Copyright 2021-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package icu.easyj.core.sequence;
import icu.easyj.core.exception.NotSupportedException;
import icu.easyj.core.loader.EnhancedServiceLoader;
import org.springframework.lang.NonNull;
import org.springframework.util.Assert;
/**
* 序列工具
*
* 如果想要使用自己的实现，可通过set方法设置，也可通过 EnhancedServiceLoader 在/META-INF/services目录下增加实现，并设置order值小于999
*
* @author wangliang181230
*/
public abstract class SequenceUtils {
//region 序列服务
public static ISequenceService sequenceService;
public static ISequenceService getSequenceService() {
if (sequenceService == null) {
sequenceService = EnhancedServiceLoader.load(ISequenceService.class);
}
return sequenceService;
}
public static void setSequenceService(ISequenceService sequenceService) {
SequenceUtils.sequenceService = sequenceService;
}
//endregion
/**
* 获取当前序列值
*
* @param seqName 序列名
* @return 当前序列值
* @throws NotSupportedException 部分实现无法设置序列值，将抛出该异常
*/
public static long currVal(@NonNull String seqName) {
Assert.notNull(seqName, "'seqName' must be not null");
return getSequenceService().currVal(seqName);
}
/**
* 获取下一序列值
*
* @param seqName 序列名
* @return 下一序列值
*/
public static long nextVal(@NonNull String seqName) {
Assert.notNull(seqName, "'seqName' must be not null");
return getSequenceService().nextVal(seqName);
}
/**
* 设置序列值
*
* @param seqName 序列名
* @param newVal 新的序列值
* @return previousVal 前序列值
* @throws NotSupportedException 部分实现无法设置序列值，将抛出该异常
*/
public static long setVal(@NonNull String seqName, long newVal) {
Assert.notNull(seqName, "'seqName' must be not null");
return getSequenceService().setVal(seqName, newVal);
}
}