@Override
public LimitedScanResult<List<TransactionId>> scanTraceIndex(
final String applicationName, SelectedScatterArea area, int limit) {
if (applicationName == null) {
throw new NullPointerException("applicationName must not be null");
}
if (area == null) {
throw new NullPointerException("area must not be null");
}
if (limit < 0) {
throw new IllegalArgumentException("negative limit:" + limit);
}
logger.debug("scanTraceIndex");
Scan scan = createScan(applicationName, area.getTimeRange());
final LimitedScanResult<List<TransactionId>> limitedScanResult = new LimitedScanResult<>();
LastRowAccessor lastRowAccessor = new LastRowAccessor();
List<List<TransactionId>> traceIndexList =
hbaseOperations2.findParallel(
HBaseTables.APPLICATION_TRACE_INDEX,
scan,
traceIdRowKeyDistributor,
limit,
traceIndexMapper,
lastRowAccessor,
APPLICATION_TRACE_INDEX_NUM_PARTITIONS);
List<TransactionId> transactionIdSum = new ArrayList<>(128);
for (List<TransactionId> transactionId : traceIndexList) {
transactionIdSum.addAll(transactionId);
}
limitedScanResult.setScanData(transactionIdSum);
if (transactionIdSum.size() >= limit) {
Long lastRowTimestamp = lastRowAccessor.getLastRowTimestamp();
limitedScanResult.setLimitedTime(lastRowTimestamp);
if (logger.isDebugEnabled()) {
logger.debug("lastRowTimestamp lastTime:{}", DateUtils.longToDateStr(lastRowTimestamp));
}
} else {
if (logger.isDebugEnabled()) {
logger.debug(
"scanner start lastTime:{}", DateUtils.longToDateStr(area.getTimeRange().getFrom()));
}
limitedScanResult.setLimitedTime(area.getTimeRange().getFrom());
}
return limitedScanResult;
}
@Override
public void handleLastResult(Result lastResult) {
if (lastResult == null) {
return;
}
Cell[] rawCells = lastResult.rawCells();
Cell last = rawCells[rawCells.length - 1];
byte[] row = CellUtil.cloneRow(last);
byte[] originalRow = traceIdRowKeyDistributor.getOriginalKey(row);
long reverseStartTime =
BytesUtils.bytesToLong(originalRow, PinpointConstants.APPLICATION_NAME_MAX_LEN);
this.lastRowTimestamp = TimeUtils.recoveryTimeMillis(reverseStartTime);
byte[] qualifier = CellUtil.cloneQualifier(last);
this.lastTransactionId = TransactionIdMapper.parseVarTransactionId(qualifier, 0);
this.lastTransactionElapsed = BytesUtils.bytesToInt(qualifier, 0);
if (logger.isDebugEnabled()) {
logger.debug(
"lastRowTimestamp={}, lastTransactionId={}, lastTransactionElapsed={}",
DateUtils.longToDateStr(lastRowTimestamp),
lastTransactionId,
lastTransactionElapsed);
}
}