注释整理

yangys

2024-05-18 040976de6f9934b99f30268a28e2ecf42260e217

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package com.qianwen.core.sequence.sequence.impl;
 
import cn.hutool.core.date.DatePattern;
import cn.hutool.core.date.DateUtil;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import com.qianwen.core.sequence.exception.SeqException;
import com.qianwen.core.sequence.range.BizName;
import com.qianwen.core.sequence.range.SeqRange;
import com.qianwen.core.sequence.range.SeqRangeMgr;
import com.qianwen.core.sequence.sequence.RangeSequence;
 
 
public class DefaultRangeSequence implements RangeSequence {
    private final Lock lock = new ReentrantLock();
    private SeqRangeMgr seqRangeMgr;
    private volatile SeqRange currentRange;
    private static Map<String, SeqRange> seqRangeMap = new ConcurrentHashMap(8);
    private BizName bizName;
    private Integer step;
    private long startStep;
 
    @Override // com.qianwen.core.sequence.sequence.RangeSequence
    public void setSeqRangeMgr(SeqRangeMgr seqRangeMgr) {
        this.seqRangeMgr = seqRangeMgr;
    }
 
    @Override // com.qianwen.core.sequence.sequence.RangeSequence
    public void setName(BizName name) {
        this.bizName = name;
    }
 
    @Override // com.qianwen.core.sequence.sequence.RangeSequence
    public void setStep(Integer step) {
        this.step = step;
    }
 
    @Override // com.qianwen.core.sequence.sequence.RangeSequence
    public void setStartStep(long startStep) {
        this.startStep = startStep;
    }
 
    @Override // com.qianwen.core.sequence.sequence.Sequence
    public long nextValue() throws SeqException {
        String name = this.bizName.create();
        this.currentRange = seqRangeMap.get(name);
        if (null == this.currentRange) {
            this.lock.lock();
            try {
                if (null == this.currentRange) {
                    this.currentRange = this.seqRangeMgr.nextRange(name);
                    seqRangeMap.put(name, this.currentRange);
                }
            } finally {
            }
        }
        long value = this.currentRange.getAndIncrement();
        if (value == -1) {
            this.lock.lock();
            while (true) {
                try {
                    if (this.currentRange.isOver()) {
                        this.currentRange = this.seqRangeMgr.nextRange(name);
                        seqRangeMap.put(name, this.currentRange);
                    }
                    value = this.currentRange.getAndIncrement();
                    if (value != -1) {
                        break;
                    }
                } finally {
                }
            }
        }
        if (value < 0) {
            throw new SeqException("Sequence value overflow, value = " + value);
        }
        return value;
    }
 
    @Override // com.qianwen.core.sequence.sequence.Sequence
    public String nextNo() throws SeqException {
        return String.format("%s%05d", DateUtil.format(new Date(), DatePattern.PURE_DATE_FORMAT), Long.valueOf(nextValue()));
    }
}