public TaskState(WorkUnitState workUnitState) {
// Since getWorkunit() returns an immutable WorkUnit object,
// the WorkUnit object in this object is also immutable.
super(workUnitState.getWorkunit());
addAll(workUnitState);
this.jobId = workUnitState.getProp(ConfigurationKeys.JOB_ID_KEY);
this.taskId = workUnitState.getProp(ConfigurationKeys.TASK_ID_KEY);
this.setId(this.taskId);
}
/**
* Get low water mark from the given work unit state.
*
* @param workUnitState Work unit state
* @return latest low water mark
*/
private long getLowWatermarkFromWorkUnit(WorkUnitState workUnitState) {
String watermarkType =
workUnitState.getProp(
ConfigurationKeys.SOURCE_QUERYBASED_WATERMARK_TYPE,
ConfigurationKeys.DEFAULT_WATERMARK_TYPE);
long lowWaterMark = workUnitState.getWorkunit().getLowWaterMark();
if (lowWaterMark == ConfigurationKeys.DEFAULT_WATERMARK_VALUE) {
return lowWaterMark;
}
WatermarkType wmType = WatermarkType.valueOf(watermarkType.toUpperCase());
int deltaNum = new WatermarkPredicate(wmType).getDeltaNumForNextWatermark();
switch (wmType) {
case SIMPLE:
return lowWaterMark - deltaNum;
default:
Date lowWaterMarkDate = Utils.toDate(lowWaterMark, "yyyyMMddHHmmss");
return Long.parseLong(
Utils.dateToString(
Utils.addSecondsToDate(lowWaterMarkDate, deltaNum * -1), "yyyyMMddHHmmss"));
}
}
/**
* 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;
}
@Override
public void setActualHighWatermark(WorkUnitState wus) {
wus.setActualHighWatermark(wus.getWorkunit().getExpectedHighWatermark(LongWatermark.class));
}