Examples with LocalResult com.actiontech.dble.backend.mysql.store.LocalResult used on opensource projects

Example 1 with LocalResult

use of com.actiontech.dble.backend.mysql.store.LocalResult in project dble by actiontech.

the class JoinHandler method ownThreadJob.

@Override
protected void ownThreadJob(Object... objects) {
    MySQLConnection conn = (MySQLConnection) objects[0];
    LocalResult leftLocal = null, rightLocal = null;
    try {
        Comparator<RowDataPacket> joinComparator = new TwoTableComparator(leftFieldPackets, rightFieldPackets, leftOrders, rightOrders, this.isAllPushDown(), this.type());
        // logger.debug("merge Join start");
        leftLocal = takeFirst(leftQueue);
        rightLocal = takeFirst(rightQueue);
        while (true) {
            if (terminate.get())
                return;
            RowDataPacket leftRow = leftLocal.getLastRow();
            RowDataPacket rightRow = rightLocal.getLastRow();
            if (leftRow.getFieldCount() == 0) {
                break;
            }
            if (rightRow.getFieldCount() == 0) {
                if (isLeftJoin) {
                    if (connectLeftAndNull(leftLocal, conn))
                        break;
                    leftLocal = takeFirst(leftQueue);
                    continue;
                } else {
                    break;
                }
            }
            int rs = joinComparator.compare(leftRow, rightRow);
            if (rs < 0) {
                if (isLeftJoin) {
                    if (connectLeftAndNull(leftLocal, conn))
                        break;
                    leftLocal = takeFirst(leftQueue);
                    continue;
                } else {
                    leftLocal.close();
                    leftLocal = takeFirst(leftQueue);
                }
            } else if (rs > 0) {
                rightLocal.close();
                rightLocal = takeFirst(rightQueue);
            } else {
                if (connectLeftAndRight(leftLocal, rightLocal, conn))
                    break;
                leftLocal = takeFirst(leftQueue);
                rightLocal = takeFirst(rightQueue);
            }
        }
        nextHandler.rowEofResponse(null, isLeft, conn);
        HandlerTool.terminateHandlerTree(this);
    } catch (Exception e) {
        String msg = "join thread error, " + e.getLocalizedMessage();
        logger.info(msg, e);
        session.onQueryError(msg.getBytes());
    } finally {
        if (leftLocal != null)
            leftLocal.close();
        if (rightLocal != null)
            rightLocal.close();
    }
}

Example 2 with LocalResult

use of com.actiontech.dble.backend.mysql.store.LocalResult in project dble by actiontech.

the class JoinHandler method takeFirst.

private LocalResult takeFirst(FairLinkedBlockingDeque<LocalResult> deque) throws InterruptedException {
    /**
     * it must be in single thread
     */
    deque.waitUtilCount(1);
    LocalResult result = deque.peekFirst();
    RowDataPacket lastRow = result.getLastRow();
    if (lastRow.getFieldCount() == 0)
        return deque.takeFirst();
    else {
        deque.waitUtilCount(2);
        return deque.takeFirst();
    }
}

Example 3 with LocalResult

use of com.actiontech.dble.backend.mysql.store.LocalResult in project dble by actiontech.

the class NotInHandler method addEndRowToDeque.

/**
 * only for terminate.
 *
 * @param row
 * @param columnCount
 * @param deque
 * @throws InterruptedException
 */
private void addEndRowToDeque(RowDataPacket row, int columnCount, FairLinkedBlockingDeque<LocalResult> deque) throws InterruptedException {
    LocalResult newLocalResult = new UnSortedLocalResult(columnCount, pool, this.charset).setMemSizeController(session.getJoinBufferMC());
    newLocalResult.add(row);
    newLocalResult.done();
    LocalResult localResult = deque.addOrReplaceLast(newLocalResult);
    if (localResult != null)
        localResult.close();
}

Example 4 with LocalResult

use of com.actiontech.dble.backend.mysql.store.LocalResult in project dble by actiontech.

the class NotInHandler method takeFirst.

private LocalResult takeFirst(FairLinkedBlockingDeque<LocalResult> deque) throws InterruptedException {
    deque.waitUtilCount(1);
    LocalResult result = deque.peekFirst();
    RowDataPacket lastRow = result.getLastRow();
    if (lastRow.getFieldCount() == 0)
        return deque.takeFirst();
    else {
        deque.waitUtilCount(2);
        return deque.takeFirst();
    }
}

Example 5 with LocalResult

use of com.actiontech.dble.backend.mysql.store.LocalResult in project dble by actiontech.

the class JoinHandler method clearDeque.

private void clearDeque(FairLinkedBlockingDeque<LocalResult> deque) {
    if (deque == null)
        return;
    LocalResult local = deque.poll();
    while (local != null) {
        local.close();
        local = deque.poll();
    }
}