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一個(gè)曆史表中有大量的數(shù)據(jù)，現(xiàn)在要通過(guò)分頁(yè)式查詢處理轉(zhuǎn)換數(shù)據(jù)。

現(xiàn)在將處理數(shù)據(jù)的邏輯放在線程池中處理，以加快處理流程。

可是總是出現(xiàn)事務(wù)方麵的異常

比如： SQLNonTransientConnectionException

請(qǐng)問(wèn)該如何解決上述異常，或者有什么好的多線程分頁(yè)查詢處理方案？

原來(lái)問(wèn)題描述不太清楚，現(xiàn)在添加以下代碼（手敲，如果有錯(cuò)，請(qǐng)多包含）

分頁(yè)式查詢邏輯:

int pageSize = 100;
int currentPageLength = 0;
int pageIndex = 0;
ExecutorService exe  = newFixedThreadPool(Runtime.getRuntime().availableProcessors());
do {
    int offset = pageIndex * pageSize;
    List<TradeInfo> tradeInfos = tradeInfoService.findTradeInfoBysPage(queryParams,offset,pageSize);
    if (null != tradeInfos && tradeInfos.size() > 0) {
        currentPageLength = tradeInfos.size();
        TradeInfoProcesserTask task = new TradeInfoProcesserTask(tradeInfos );
        exe.execute(task);
        pageIndex++;
    }else{
        System.out.println("Page Query TradeInfo Got NOTHING! Break query loop!");
        break;
    }
} while (currentPageLength == pageSize);

exe.shutdown();

while(true) {
    if(exe.isTerminated()){
        doOtherThings();
        System.out.println("分頁(yè)式多線程處理數(shù)據(jù)完畢！");
        break;
    }
}

數(shù)據(jù)處理邏輯:

public class TradeInfoProcesserTask implements Runnable{
    private volatile List<TradeInfo> tradeInfos;
    
    public TradeInfoProcesserTask (List<TradeInfo> _tradeInfos){
        tradeInfos = _tradeInfos;
    }
    
    @Override
    public void run() {
        processTradeInfos();
    }
    
    private void processTradeInfos(){
        //do something with tradeInfos .....
    }
}

ExecutorService exe = newFixedThreadPool(Runtime.getRuntime().availableProcessors()); CountDownLatch latch = new CountDownLatch(?); //?代表開(kāi)啟全部線程的數(shù)量 do { int offset = pageIndex * pageSize; List<TradeInfo> tradeInfos = tradeInfoService.findTradeInfoBysPage(queryParams,offset,pageSize); if (null != tradeInfos && tradeInfos.size() > 0) { currentPageLength = tradeInfos.size(); TradeInfoProcesserTask task = new TradeInfoProcesserTask(tradeInfos, latch); exe.execute(task); pageIndex++; }else{ System.out.println("Page Query TradeInfo Got NOTHING! Break query loop!"); break; } } while (currentPageLength == pageSize); latch.await(); //多線程全部執(zhí)行完 exe.shutdown(); doOtherThings(); System.out.println("分頁(yè)式多線程處理數(shù)據(jù)完畢！");

public class TradeInfoProcesserTask implements Runnable{ private volatile List<TradeInfo> tradeInfos; private CountDownLatch latch; public TradeInfoProcesserTask (List<TradeInfo> _tradeInfos, CountDownLatch latch){ tradeInfos = _tradeInfos; this.latch = latch; } @Override public void run() { processTradeInfos(); latch.countDown(); } private void processTradeInfos(){ //do something with tradeInfos ..... } }