如何在代码中使用自增ID和获取序列

在使用继承IDModel或CodeModel时,id和code是系统默认自动生成, 默认值规则:ID-->分布式ID; CODE-->根据定义的SequenceConfig规则自动生成。

在特定情况下需要落库前先生成ID或者Code,这些场景下可参照如下代码示例

一、使用自增ID

单个字段设置方式

// 主键字段,可以使用mysql的自增能力
@Field.Integer
@Field.PrimaryKey(keyGenerator = KeyGeneratorEnum.AUTO_INCREMENT)
@Field.Advanced(batchStrategy = FieldStrategyEnum.NEVER)
@Field(displayName = "id", summary = "Id字段,⾃增")
private Long id;

@Field.Integer
@Field(displayName = "自增版本")
@Field.Sequence(sequence = "SEQ", initial = 1)
private Long version;

全局设置方式

该方式会作用到每一个存储模型的id字段,在application.yml配置文件中修改id的生成规则,查找配置项关键字key-generator,默认为DISTRIBUTION(分布式id),可修改为 AUTO_INCREMENT(自增id)
如何在代码中使用自增ID和获取序列

二、手动方式获取序列

获取方式示例1

   /**
     * 在特定场景下需要手动生成Id或者code时,可参照这个示例
     */
    public void manualSetIdCode(){
        DemoItem demoItem = new DemoItem();
        //手动生成ID和code
        Object idObj =  Spider.getDefaultExtension(IdGenerator.class).generate(PamirsTableInfo.fetchKeyGenerator(DemoItem.MODEL_MODEL));
        demoItem.setId(TypeUtils.createLong(idObj));
        Object codeObj = CommonApiFactory.getSequenceGenerator().generate("SEQ",DemoItem.MODEL_MODEL);
        String code = TypeUtils.stringValueOf(codeObj);
        demoItem.setCode(code);
        //……
    }

获取方式示例2

1、在系统启动的时候初始化SequenceConfig

package pro.shushi.pamirs.demo.core.init;

import org.springframework.stereotype.Component;
import pro.shushi.pamirs.boot.common.api.command.AppLifecycleCommand;
import pro.shushi.pamirs.boot.common.extend.MetaDataEditor;
import pro.shushi.pamirs.core.common.InitializationUtil;
import pro.shushi.pamirs.demo.api.DemoModule;
import pro.shushi.pamirs.demo.core.constant.SeqConstants;
import pro.shushi.pamirs.meta.annotation.fun.extern.Slf4j;
import pro.shushi.pamirs.meta.api.dto.meta.Meta;
import pro.shushi.pamirs.meta.enmu.SequenceEnum;

import java.util.Map;

/**
 * DemoMetadataEditor
 */
@Slf4j
@Component
public class DemoMetadataEditor implements MetaDataEditor {

    @Override
    public void edit(AppLifecycleCommand command, Map<String, Meta> metaMap) {
        InitializationUtil util = InitializationUtil.get(metaMap, DemoModule.MODULE_MODULE, DemoModule.MODULE_NAME);
        if (util == null) {
            log.error("获取初始化序列失败");
            return;
        }

        bizSequence(util);
    }

    private void bizSequence(InitializationUtil util) {
        util.createSequenceConfig("申请单编码生成", SeqConstants.NABEL_SAMPLE_APPLY_SEQ, SequenceEnum.ORDERLY_SEQ, 8)
                .setStep(1)
                .setInitial(80000000L)
                .setIsRandomStep(false);

        util.createSequenceConfig("订单编码生成", SeqConstants.NABEL_SAMPLE_ORDER_SEQ_YP, SequenceEnum.ORDERLY_SEQ, 8)
                .setPrefix("YP")
                .setStep(1)
                .setInitial(80000000L)
                .setIsRandomStep(false);
    }
}

2、在代码中使用序列

    public static String getSaleOrderCode() {
        Object sequence = CommonApiFactory.getSequenceGenerator().generate(SequenceEnum.ORDERLY_SEQ.value(),
                SeqConstants.NABEL_SAMPLE_STRUCTURE_SEQ);
        return TypeUtils.stringValueOf(sequence);
    }

    public static String getApplyOrderCode(String prefix) {
        Object sequence = CommonApiFactory.getSequenceGenerator().generate(SequenceEnum.ORDERLY_SEQ.value(),
                SeqConstants.NABEL_SAMPLE_APPLY_SEQ);
        return SeqConstants.NABEL_SAMPLE_APPLY_PREFIX + prefix + TypeUtils.stringValueOf(sequence);
    }

Oinone社区 作者:望闲原创文章,如若转载,请注明出处:https://doc.oinone.top/backend/11457.html

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