/**
* @param viskoService
* @param inputDataURL
* @param serviceIndex
* @return
* @throws ExecutionException
*/
private String executeService(
edu.utep.trustlab.visko.ontology.viskoService.Service viskoService,
String inputDataURL,
int serviceIndex)
throws ExecutionException {
OWLKnowledgeBase kb = OWLFactory.createKB();
Service service = viskoService.getOWLSService().getIndividual();
Process process = service.getProcess();
ValueMap<Input, OWLValue> inputs =
OWLSParameterBinder.buildInputValueMap(
process, inputDataURL, job.getPipeline().getParameterBindings(), kb);
String outputDataURL = null;
if (inputs != null) {
ValueMap<Output, OWLValue> outputs;
if (job.isSimulated()) outputDataURL = ServiceSimulator.exec();
else {
outputs = exec.execute(process, inputs, kb);
OWLDataValue out = (OWLDataValue) outputs.getValue(process.getOutput());
outputDataURL = out.toString();
}
if (job.getProvenanceLogging()) {
pmlLogger.recordServiceInvocation(viskoService, inputDataURL, outputDataURL, inputs);
provLogger.recordServiceInvocation(viskoService, inputDataURL, outputDataURL, inputs);
}
}
return outputDataURL;
}
/**
* Because the PipelineExecutor is synchronous, calling this method signals that the previous
* PipelineExecutorJob has completed and 'pipelineJob' is the next one to perform.
*
* @param pipelineJob a new Job to execute (replacing the already-finished old Job).
*/
public void setJob(PipelineExecutorJob pipelineJob) {
job = pipelineJob;
job.getJobStatus().setTotalServiceCount(job.getPipeline().size());
if (job.getProvenanceLogging()) {
pmlLogger = new PML2PipelineExecutionProvenanceLogger();
provLogger = new PROVPipelineExecutionProvenanceLogger();
String viskoQuery = job.getPipeline().getParentPipelineSet().getQuery().toString();
pmlLogger.recordVisKoQuery(viskoQuery);
provLogger.recordVisKoQuery(viskoQuery);
}
exec = OWLSFactory.createExecutionEngine();
isScheduledForTermination = false;
}
public void process() { // TODO: How many methods can you have with these synonyms: process, run,
// executePipeline? (apparently, 3)
if (job.getJobStatus().getPipelineState() == PipelineExecutorJobStatus.PipelineState.NEW) {
t = new Thread(this);
t.setDaemon(true);
t.start();
}
}
@Override
public void run() {
try {
if (!job.getPipeline().hasInputData()) {
job.getJobStatus().setPipelineState(PipelineExecutorJobStatus.PipelineState.NODATA);
} else if (job.getPipeline().isEmpty()) {
job.getJobStatus().setPipelineState(PipelineExecutorJobStatus.PipelineState.EMPTYPIPELINE);
} else {
executePipeline();
job.getJobStatus().setPipelineState(PipelineExecutorJobStatus.PipelineState.COMPLETE);
}
} catch (Exception e) {
e.printStackTrace();
job.getJobStatus().setPipelineState(PipelineExecutorJobStatus.PipelineState.ERROR);
}
}
private void executePipeline() throws ExecutionException {
if (job.getProvenanceLogging()) {
provLogger.recordPipelineStart();
pmlLogger.recordPipelineStart();
}
job.getJobStatus().setPipelineState(PipelineExecutorJobStatus.PipelineState.RUNNING);
String resultURL = job.getPipeline().getArtifactURL();
System.out.println(job.getJobStatus());
for (int i = 0; i < job.getPipeline().size(); i++) {
edu.utep.trustlab.visko.ontology.viskoService.Service viskoService =
job.getPipeline().getService(i);
// Capture initial dataset
if (job.getProvenanceLogging() && i == 0) {
pmlLogger.recordInitialDataset(resultURL, job.getPipeline().getService(i));
provLogger.recordInitialDataset(resultURL, job.getPipeline().getService(i));
}
job.getJobStatus().setCurrentService(viskoService.getOWLSService().getURI(), i);
System.out.println(job.getJobStatus());
resultURL = executeService(viskoService, resultURL, i);
if (isScheduledForTermination) {
System.out.println("This thread's execution was interrupted and will quit!");
job.getJobStatus().setPipelineState(PipelineExecutorJobStatus.PipelineState.INTERRUPTED);
break;
}
}
job.setFinalResultURL(resultURL);
if (job.getProvenanceLogging()) {
provLogger.recordPipelineEnd(job);
pmlLogger.recordPipelineEnd(job);
// Set URIs on Job
job.setPMLQueryURI(pmlLogger.finish());
job.setProvQueryURI(provLogger.finish());
}
}