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package eu.dnetlib.msro.workflows.procs;
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import java.util.concurrent.Executors;
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import java.util.concurrent.TimeUnit;
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import javax.annotation.PostConstruct;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Component;
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import eu.dnetlib.clients.is.InformationServiceClient;
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import eu.dnetlib.enabling.common.Stoppable;
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import eu.dnetlib.enabling.common.StoppableDetails;
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import eu.dnetlib.msro.exceptions.MSROException;
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import eu.dnetlib.msro.workflows.WorkflowInstance;
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import eu.dnetlib.msro.workflows.WorkflowsConstants;
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import eu.dnetlib.services.async.AsyncServerCallback;
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@Component
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public class WorkflowExecutor implements Stoppable {
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private static final Log log = LogFactory.getLog(WorkflowExecutor.class);
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@Autowired
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private InformationServiceClient isLookup;
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@Autowired
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private ProcessRegistry processRegistry;
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@Autowired
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private ProcessFactory processFactory;
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@Autowired
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private ProcessEngine processEngine;
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private boolean paused = false;
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@PostConstruct
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public void init() {
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Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(() -> {
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if (isPaused() || (processRegistry.countRunningWfs() >= WorkflowsConstants.MAX_RUNNING_PROCS_SIZE)) { return; }
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final WorkflowProcess process = processRegistry.nextProcessToStart();
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if (process != null) {
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processEngine.startProcess(process);
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} else {
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log.debug("WorkflowProcess queue is empty");
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}
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}, 10, 10, TimeUnit.SECONDS);
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}
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public String startWorkflow(final WorkflowInstance wf, final AsyncServerCallback callback) throws Exception {
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if (isPaused()) {
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log.warn("Wf " + wf.getProfileId() + " not launched, because WorkflowExecutor is preparing for shutdown");
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throw new MSROException("WorkflowExecutor is preparing for shutdown");
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}
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try {
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final WorkflowProcess process = processFactory.newProcess(wf, callback);
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return processRegistry.registerProcess(process);
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} catch (final Exception e) {
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log.error("Error ppreparing workflow: " + wf.getProfileId(), e);
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throw new MSROException("Error parsing workflow");
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}
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}
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@Override
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public void stop() {
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paused = true;
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}
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@Override
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public void resume() {
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paused = false;
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}
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@Override
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public StoppableDetails getStopDetails() {
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final int count = processRegistry.countRunningWfs();
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final StoppableDetails.StopStatus status =
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isPaused() ? (count == 0 ? StoppableDetails.StopStatus.STOPPED : StoppableDetails.StopStatus.STOPPING) : StoppableDetails.StopStatus.RUNNING;
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return new StoppableDetails("D-NET workflow manager", "Running workflows: " + count, status);
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}
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public boolean isPaused() {
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return paused;
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}
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public void setPaused(final boolean paused) {
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this.paused = paused;
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}
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}
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