protected boolean nextScanner(final boolean done) throws IOException {
if (LOG.isTraceEnabled()) LOG.trace("nextScanner() -- ENTRY txID: " + ts.getTransactionId());
if (this.interrupted) {
if (LOG.isDebugEnabled())
LOG.debug("nextScanner() resetting connection, txID: " + ts.getTransactionId());
ttable.resetConnection();
this.interrupted = false;
}
if (this.currentBeginKey != null) {
if (LOG.isTraceEnabled())
LOG.trace("nextScanner() currentBeginKey != null txID: " + ts.getTransactionId());
if (doNotCloseOnLast) close();
if ((this.currentEndKey == HConstants.EMPTY_END_ROW)
|| Bytes.equals(this.currentEndKey, HConstants.EMPTY_BYTE_ARRAY)
|| checkScanStopRow(this.currentEndKey)
|| done) {
if (LOG.isTraceEnabled()) LOG.trace("endKey: " + Bytes.toString(this.currentEndKey));
if (LOG.isTraceEnabled())
LOG.trace("nextScanner() -- EXIT -- returning false txID: " + ts.getTransactionId());
this.moreScanners = false;
return false;
} else this.currentBeginKey = TransactionManager.binaryIncrementPos(this.currentEndKey, 1);
} else {
// First call to nextScanner
this.currentBeginKey = this.scan.getStartRow();
}
this.currentRegion = ttable.getRegionLocation(this.currentBeginKey).getRegionInfo();
this.currentEndKey = this.currentRegion.getEndKey();
if (LOG.isTraceEnabled()) LOG.trace("Region Info: " + currentRegion.getRegionNameAsString());
if (this.currentEndKey != HConstants.EMPTY_END_ROW)
this.currentEndKey = TransactionManager.binaryIncrementPos(currentRegion.getEndKey(), -1);
this.closed = false;
TrxRegionProtos.OpenScannerRequest.Builder requestBuilder = OpenScannerRequest.newBuilder();
requestBuilder.setTransactionId(ts.getTransactionId());
requestBuilder.setRegionName(ByteString.copyFromUtf8(currentRegion.getRegionNameAsString()));
requestBuilder.setScan(ProtobufUtil.toScan(scan));
TrxRegionProtos.OpenScannerRequest openRequest = requestBuilder.build();
try {
CoprocessorRpcChannel channel = ttable.coprocessorService(this.currentBeginKey);
TrxRegionService.BlockingInterface trxService = TrxRegionService.newBlockingStub(channel);
TrxRegionProtos.OpenScannerResponse response = trxService.openScanner(null, openRequest);
String exception = response.getException();
if (response.getHasException()) {
String errMsg =
"nextScanner encountered Exception txID: "
+ ts.getTransactionId()
+ " Exception: "
+ exception;
LOG.error(errMsg);
throw new IOException(errMsg);
}
this.scannerID = response.getScannerId();
} catch (ServiceException se) {
this.interrupted = true;
String errMsg =
"OpenScanner error encountered Service Exception, scannerID: "
+ this.scannerID
+ " "
+ se;
LOG.error(errMsg);
throw new IOException(errMsg);
} catch (Throwable e) {
String errMsg =
"OpenScanner error on coprocessor call, scannerID: " + this.scannerID + " " + e;
LOG.error(errMsg);
throw new IOException(errMsg);
}
this.nextCallSeq = 0;
if (LOG.isTraceEnabled())
LOG.trace("nextScanner() -- EXIT -- returning true txID: " + ts.getTransactionId());
return true;
}
