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package eu.dnetlib.msro.cron;
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import java.util.Date;
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import javax.annotation.Resource;
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import org.apache.commons.lang.StringUtils;
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import org.apache.commons.lang.math.NumberUtils;
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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.quartz.CronExpression;
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import org.springframework.beans.factory.annotation.Required;
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import com.googlecode.sarasvati.GraphProcess;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
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import eu.dnetlib.enabling.tools.ServiceLocator;
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import eu.dnetlib.miscutils.datetime.DateUtils;
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import eu.dnetlib.msro.workflows.sarasvati.loader.WorkflowExecutor;
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import eu.dnetlib.msro.workflows.sarasvati.registry.GraphProcessRegistry;
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public class ScheduledWorkflowLauncher {
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private static final Log log = LogFactory.getLog(ScheduledWorkflowLauncher.class);
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private static final DateUtils dateUtils = new DateUtils();
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private WorkflowExecutor workflowExecutor;
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private GraphProcessRegistry graphProcessRegistry;
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private int windowSize = 7200000; // 2 hours
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@Resource(name="lookupLocator")
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private ServiceLocator<ISLookUpService> lookupLocator;
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public void verifySheduledWorkflows() {
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log.debug("Verifying scheduled workflows - START");
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final String query = "for $x in collection('/db/DRIVER/MetaWorkflowDSResources/MetaWorkflowDSResourceType') " +
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"where $x//CONFIGURATION/@status='EXECUTABLE' " +
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"and $x//SCHEDULING/@enabled='true' " +
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"return concat($x//RESOURCE_IDENTIFIER/@value, ' @@@ ', $x//SCHEDULING/CRON, ' @@@ ', $x//SCHEDULING/MININTERVAL)";
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try {
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for (String s : lookupLocator.getService().quickSearchProfile(query)) {
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final String[] arr = s.split("@@@");
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final String id = arr[0].trim();
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final String cron = arr[1].trim();
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final int minInterval = NumberUtils.toInt(arr[2].trim(), 0) * 60000; // MINUTES to MILLIS
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if (CronExpression.isValidExpression(cron)) {
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final Date now = new Date();
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final Date last = calculateLastExecutionDate(id);
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final int elapsed = Math.abs(Math.round(now.getTime() - last.getTime()));
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if (log.isDebugEnabled()) {
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log.debug("**************************************************************");
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log.debug("META WORKFLOW ID : " + id);
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log.debug("NOW : " + now);
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log.debug("LAST EXECUTION DATE: " + last);
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log.debug("MIN INTERVAL : " + minInterval);
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log.debug("WINDOW SIZE : " + windowSize);
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log.debug("TIME ELAPSED : " + elapsed);
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}
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if (elapsed > minInterval && isFired(cron, last, now) && !isAlreadyRunning(id)) {
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log.debug("MUST BE EXECUTED : true");
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try {
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workflowExecutor.startMetaWorkflow(id, false);
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} catch (Exception e) {
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log.error("Error launching scheduled wf: " + id, e);
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}
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} else {
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log.debug("MUST BE EXECUTED : false");
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}
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log.debug("**************************************************************");
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}
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}
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} catch (ISLookUpException e) {
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log.error("Error executing query " + query);
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}
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log.debug("Verifying scheduled workflows - END");
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}
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private boolean isFired(final String cronExpression, final Date startDate, final Date now) {
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try {
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final CronExpression cron = new CronExpression(cronExpression);
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final Date prev = new Date(now.getTime() - windowSize);
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final Date date = (prev.getTime() < startDate.getTime()) ? startDate : prev;
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final Date next = cron.getNextValidTimeAfter(date);
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if (log.isDebugEnabled()) {
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log.debug("NEXT EXECUTION DATE: " + next);
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log.debug("FIRED : " + (next.getTime() < now.getTime()));
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}
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return (next.getTime() < now.getTime());
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} catch (Exception e) {
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log.error("Error calculating next cron event: " + cronExpression, e);
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return false;
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}
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}
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private boolean isAlreadyRunning(final String metaWfId) {
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final String query = "document('/db/DRIVER/MetaWorkflowDSResources/MetaWorkflowDSResourceType/" + StringUtils.substringBefore(metaWfId, "_") + "')//WORKFLOW/@id/string()";
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try {
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for (String profileId : lookupLocator.getService().quickSearchProfile(query)) {
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if (profileId.length() > 0) {
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for (GraphProcess p : graphProcessRegistry.findProcessesByResource(profileId)) {
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switch (p.getState()) {
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case Created:
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return true;
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case Executing:
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return true;
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default:
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break;
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}
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}
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}
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}
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} catch (ISLookUpException e) {
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log.error("Error executing query " + query);
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}
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return false;
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}
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private Date calculateLastExecutionDate(final String id) {
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final String query = "for $id in document('/db/DRIVER/MetaWorkflowDSResources/MetaWorkflowDSResourceType/" + StringUtils.substringBefore(id, "_") + "')//WORKFLOW/@id/string() " +
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"for $x in document(concat('/db/DRIVER/WorkflowDSResources/WorkflowDSResourceType/', substring-before($id, '_'))) " +
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"where $x//LAST_EXECUTION_STATUS = 'SUCCESS' " +
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"return $x//LAST_EXECUTION_DATE/text() ";
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long time = 0;
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try {
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for (String s : lookupLocator.getService().quickSearchProfile(query)) {
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if (s.length() > 0) {
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final Date d = dateUtils.parse(s);
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if (time < d.getTime()) {
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time = d.getTime();
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}
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}
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}
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} catch (ISLookUpException e) {
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log.error("Error executing query " + query);
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} catch (Exception e) {
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log.error("Error calculating date", e);
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}
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return new Date(time);
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}
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public WorkflowExecutor getWorkflowExecutor() {
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return workflowExecutor;
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}
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@Required
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public void setWorkflowExecutor(WorkflowExecutor workflowExecutor) {
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this.workflowExecutor = workflowExecutor;
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}
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public GraphProcessRegistry getGraphProcessRegistry() {
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return graphProcessRegistry;
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}
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@Required
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public void setGraphProcessRegistry(GraphProcessRegistry graphProcessRegistry) {
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this.graphProcessRegistry = graphProcessRegistry;
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}
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public int getWindowSize() {
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return windowSize;
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}
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@Required
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public void setWindowSize(int windowSize) {
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this.windowSize = windowSize;
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}
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}
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