/**
* Get latest water mark from previous work unit states.
*
* @param state Source state
* @return latest water mark (high water mark)
*/
private long getLatestWatermarkFromMetadata(SourceState state) {
LOG.debug("Get latest watermark from the previous run");
long latestWaterMark = ConfigurationKeys.DEFAULT_WATERMARK_VALUE;
List<WorkUnitState> previousWorkUnitStates =
Lists.newArrayList(state.getPreviousWorkUnitStates());
List<Long> previousWorkUnitStateHighWatermarks = Lists.newArrayList();
List<Long> previousWorkUnitLowWatermarks = Lists.newArrayList();
if (previousWorkUnitStates.isEmpty()) {
LOG.info(
"No previous work unit states found; Latest watermark - Default watermark: "
+ latestWaterMark);
return latestWaterMark;
}
boolean hasFailedRun = false;
boolean isCommitOnFullSuccess = false;
boolean isDataProcessedInPreviousRun = false;
JobCommitPolicy commitPolicy =
JobCommitPolicy.forName(
state.getProp(
ConfigurationKeys.JOB_COMMIT_POLICY_KEY,
ConfigurationKeys.DEFAULT_JOB_COMMIT_POLICY));
if (commitPolicy == JobCommitPolicy.COMMIT_ON_FULL_SUCCESS) {
isCommitOnFullSuccess = true;
}
for (WorkUnitState workUnitState : previousWorkUnitStates) {
long processedRecordCount = 0;
LOG.info(
"State of the previous task: "
+ workUnitState.getId()
+ ":"
+ workUnitState.getWorkingState());
if (workUnitState.getWorkingState() == WorkingState.FAILED
|| workUnitState.getWorkingState() == WorkingState.CANCELLED
|| workUnitState.getWorkingState() == WorkingState.RUNNING
|| workUnitState.getWorkingState() == WorkingState.PENDING) {
hasFailedRun = true;
} else {
processedRecordCount =
workUnitState.getPropAsLong(ConfigurationKeys.EXTRACTOR_ROWS_EXPECTED);
if (processedRecordCount != 0) {
isDataProcessedInPreviousRun = true;
}
}
LOG.info(
"Low watermark of the previous task: "
+ workUnitState.getId()
+ ":"
+ workUnitState.getWorkunit().getLowWaterMark());
LOG.info(
"High watermark of the previous task: "
+ workUnitState.getId()
+ ":"
+ workUnitState.getHighWaterMark());
LOG.info("Record count of the previous task: " + processedRecordCount + "\n");
// Consider high water mark of the previous work unit, if it is
// extracted any data
if (processedRecordCount != 0) {
previousWorkUnitStateHighWatermarks.add(workUnitState.getHighWaterMark());
}
previousWorkUnitLowWatermarks.add(this.getLowWatermarkFromWorkUnit(workUnitState));
}
// If commit policy is full and it has failed run, get latest water mark
// as
// minimum of low water marks from previous states.
if (isCommitOnFullSuccess && hasFailedRun) {
long previousLowWatermark = Collections.min(previousWorkUnitLowWatermarks);
WorkUnitState previousState = previousWorkUnitStates.get(0);
ExtractType extractType =
ExtractType.valueOf(
previousState
.getProp(ConfigurationKeys.SOURCE_QUERYBASED_EXTRACT_TYPE)
.toUpperCase());
// add backup seconds only for snapshot extracts but not for appends
if (extractType == ExtractType.SNAPSHOT) {
int backupSecs =
previousState.getPropAsInt(
ConfigurationKeys.SOURCE_QUERYBASED_LOW_WATERMARK_BACKUP_SECS, 0);
String watermarkType =
previousState.getProp(ConfigurationKeys.SOURCE_QUERYBASED_WATERMARK_TYPE);
latestWaterMark = this.addBackedUpSeconds(previousLowWatermark, backupSecs, watermarkType);
} else {
latestWaterMark = previousLowWatermark;
}
LOG.info(
"Previous job was COMMIT_ON_FULL_SUCCESS but it was failed; Latest watermark - "
+ "Min watermark from WorkUnits: "
+ latestWaterMark);
}
// If commit policy is full and there are no failed tasks or commit
// policy is partial,
// get latest water mark as maximum of high water marks from previous
// tasks.
else {
if (isDataProcessedInPreviousRun) {
latestWaterMark = Collections.max(previousWorkUnitStateHighWatermarks);
LOG.info(
"Previous run was successful. Latest watermark - Max watermark from WorkUnitStates: "
+ latestWaterMark);
} else {
latestWaterMark = Collections.min(previousWorkUnitLowWatermarks);
LOG.info(
"Previous run was successful but no data found. Latest watermark - Min watermark from WorkUnitStates: "
+ latestWaterMark);
}
}
return latestWaterMark;
}
protected void publishData(
WorkUnitState workUnitState, int branchId, Set<Path> writerOutputPathsMoved)
throws IOException {
// Get a ParallelRunner instance for moving files in parallel
ParallelRunner parallelRunner = this.getParallelRunner(this.fileSystemByBranches.get(branchId));
// The directory where the workUnitState wrote its output data.
Path writerOutputDir =
WriterUtils.getWriterOutputDir(workUnitState, this.numBranches, branchId);
if (writerOutputPathsMoved.contains(writerOutputDir)) {
// This writer output path has already been moved for another task of the same extract
return;
}
if (!this.fileSystemByBranches.get(branchId).exists(writerOutputDir)) {
LOG.warn(
String.format(
"Branch %d of WorkUnit %s produced no data", branchId, workUnitState.getId()));
return;
}
// The directory where the final output directory for this job will be placed.
// It is a combination of DATA_PUBLISHER_FINAL_DIR and WRITER_FILE_PATH.
Path publisherOutputDir = getPublisherOutputDir(workUnitState, branchId);
if (this.fileSystemByBranches.get(branchId).exists(publisherOutputDir)) {
// The final output directory already exists, check if the job is configured to replace it.
boolean replaceFinalOutputDir =
this.getState()
.getPropAsBoolean(
ForkOperatorUtils.getPropertyNameForBranch(
ConfigurationKeys.DATA_PUBLISHER_REPLACE_FINAL_DIR,
this.numBranches,
branchId));
// If the final output directory is not configured to be replaced, put new data to the
// existing directory.
if (!replaceFinalOutputDir) {
addWriterOutputToExistingDir(
writerOutputDir, publisherOutputDir, workUnitState, branchId, parallelRunner);
writerOutputPathsMoved.add(writerOutputDir);
return;
}
// Delete the final output directory if it is configured to be replaced
this.fileSystemByBranches.get(branchId).delete(publisherOutputDir, true);
} else {
// Create the parent directory of the final output directory if it does not exist
WriterUtils.mkdirsWithRecursivePermission(
this.fileSystemByBranches.get(branchId),
publisherOutputDir.getParent(),
this.permissions.get(branchId));
}
LOG.info(String.format("Moving %s to %s", writerOutputDir, publisherOutputDir));
parallelRunner.renamePath(
writerOutputDir,
publisherOutputDir,
this.publisherFinalDirOwnerGroupsByBranches.get(branchId));
writerOutputPathsMoved.add(writerOutputDir);
}