* @see org.opencastproject.workflow.api.WorkflowOperationHandler#start(org.opencastproject.workflow.api.WorkflowInstance, JobContext)
*/
@Override
public WorkflowOperationResult start(WorkflowInstance workflowInstance, JobContext context) throws WorkflowOperationException {
MediaPackage mediaPackage = workflowInstance.getMediaPackage();
WorkflowOperationInstance operation = workflowInstance.getCurrentOperation();
logger.debug("Running execute workflow operation with ID {}", operation.getId());
// Get operation parameters
String exec = StringUtils.trimToNull(operation.getConfiguration(EXEC_PROPERTY));
String params = StringUtils.trimToNull(operation.getConfiguration(PARAMS_PROPERTY));
String sourceFlavor = StringUtils.trimToNull(operation.getConfiguration(SOURCE_FLAVOR_PROPERTY));
String sourceTags = StringUtils.trimToNull(operation.getConfiguration(SOURCE_TAGS_PROPERTY));
String targetFlavorStr = StringUtils.trimToNull(operation.getConfiguration(TARGET_FLAVOR_PROPERTY));
String targetTags = StringUtils.trimToNull(operation.getConfiguration(TARGET_TAGS_PROPERTY));
String outputFilename = StringUtils.trimToNull(operation.getConfiguration(OUTPUT_FILENAME_PROPERTY));
String expectedTypeStr = StringUtils.trimToNull(operation.getConfiguration(EXPECTED_TYPE_PROPERTY));
MediaPackageElementFlavor matchingFlavor = null;
if (sourceFlavor != null)
matchingFlavor = MediaPackageElementFlavor.parseFlavor(sourceFlavor);
// Unmarshall target flavor
MediaPackageElementFlavor targetFlavor = null;
if (targetFlavorStr != null)
targetFlavor = MediaPackageElementFlavor.parseFlavor(targetFlavorStr);
// Unmarshall expected mediapackage element type
MediaPackageElement.Type expectedType = null;
if (expectedTypeStr != null) {
for (MediaPackageElement.Type type : MediaPackageElement.Type.values())
if (type.toString().equalsIgnoreCase(expectedTypeStr)) {
expectedType = type;
break;
}
if (expectedType == null)
throw new WorkflowOperationException("'" + expectedTypeStr + "' is not a valid element type");
}
List<String> sourceTagList = asList(sourceTags);
// Select the tracks based on source flavors and tags
Set<MediaPackageElement> inputSet = new HashSet<MediaPackageElement>();
for (MediaPackageElement element : mediaPackage.getElementsByTags(sourceTagList)) {
MediaPackageElementFlavor elementFlavor = element.getFlavor();
if (sourceFlavor == null || (elementFlavor != null && elementFlavor.matches(matchingFlavor))) {
inputSet.add(element);
}
}
if (inputSet.size() == 0) {
logger.warn("Mediapackage {} has no suitable elements to execute the command {} based on tags {} and flavor {}",
new Object[] { mediaPackage, exec, sourceTags, sourceFlavor });
return createResult(mediaPackage, Action.CONTINUE);
}
MediaPackageElement[] inputElements = inputSet.toArray(new MediaPackageElement[inputSet.size()]);
try{
Job[] jobs = new Job[inputElements.length];
MediaPackageElement[] resultElements = new MediaPackageElement[inputElements.length];
long totalTimeInQueue = 0;
for (int i = 0; i < inputElements.length; i++)
jobs[i] = executeService.execute(exec, params, inputElements[i], outputFilename, expectedType);
// Wait for all jobs to be finished
if (!waitForStatus(jobs).isSuccess())
throw new WorkflowOperationException("Execute operation failed");
// Find which output elements are tracks and inspect them
HashMap<Integer,Job> jobMap = new HashMap<Integer,Job>();
for (int i = 0; i < jobs.length; i++) {
// Add this job's queue time to the total
totalTimeInQueue += jobs[i].getQueueTime();
if (StringUtils.trimToNull(jobs[i].getPayload()) != null) {
resultElements[i] = MediaPackageElementParser.getFromXml(jobs[i].getPayload());
if (resultElements[i].getElementType() == MediaPackageElement.Type.Track) {
jobMap.put(i, inspectionService.inspect(resultElements[i].getURI()));
}
} else
resultElements[i] = inputElements[i];
}
if (jobMap.size() > 0) {
if (!waitForStatus(jobMap.values().toArray(new Job[jobMap.size()])).isSuccess())
throw new WorkflowOperationException("Execute operation failed in track inspection");
for (Entry<Integer, Job> entry : jobMap.entrySet()) {
// Add this job's queue time to the total
totalTimeInQueue += entry.getValue().getQueueTime();
resultElements[entry.getKey()] = MediaPackageElementParser.getFromXml(entry.getValue().getPayload());
}
}
for (int i = 0; i < resultElements.length; i++) {
if (resultElements[i] != inputElements[i]) {
// Store new element to mediaPackage
mediaPackage.addDerived(resultElements[i], inputElements[i]);
// Store new element to mediaPackage
URI uri = workspace.moveTo(resultElements[i].getURI(), mediaPackage.getIdentifier().toString(),
resultElements[i].getIdentifier(), outputFilename);
resultElements[i].setURI(uri);
// Set new flavor