modules/airavata-metascheduler/process-scheduler/src/main/java/org/apache/airavata/metascheduler/process/scheduling/engine/rescheduler/ProcessScannerImpl.java

package org.apache.airavata.metascheduler.process.scheduling.engine.rescheduler;

import org.apache.airavata.common.utils.ServerSettings;
import org.apache.airavata.common.utils.ThriftClientPool;
import org.apache.airavata.metascheduler.core.engine.ProcessScanner;
import org.apache.airavata.metascheduler.core.engine.ReScheduler;
import org.apache.airavata.metascheduler.core.utils.Utils;
import org.apache.airavata.model.process.ProcessModel;
import org.apache.airavata.model.status.ProcessState;
import org.apache.airavata.registry.api.RegistryService;
import org.apache.airavata.registry.api.RegistryService.Client;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.impl.JobExecutionContextImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

public class ProcessScannerImpl implements ProcessScanner {
    private static final Logger LOGGER = LoggerFactory.getLogger(ProcessScannerImpl.class);

    protected static ThriftClientPool<RegistryService.Client> registryClientPool = Utils.getRegistryServiceClientPool();


    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        RegistryService.Client client = null;
        try {
            LOGGER.debug("Executing Process scanner ....... ");
            client = this.registryClientPool.getResource();
            ProcessState state = ProcessState.QUEUED;
            List<ProcessModel> processModelList = client.getProcessListInState(state);

            String reSchedulerPolicyClass = ServerSettings.getReSchedulerPolicyClass();
            ReScheduler reScheduler = (ReScheduler) Class.forName(reSchedulerPolicyClass).newInstance();

            for (ProcessModel processModel : processModelList) {
                reScheduler.reschedule(processModel, state);
            }

            ProcessState ReQueuedState = ProcessState.REQUEUED;
            List<ProcessModel> reQueuedProcessModels = client.getProcessListInState(ReQueuedState);

            for (ProcessModel processModel : reQueuedProcessModels) {
                reScheduler.reschedule(processModel, ReQueuedState);
            }

        } catch (Exception ex) {
            String msg = "Error occurred while executing job" + ex.getMessage();
            LOGGER.error(msg, ex);
            if (client != null) {
                this.registryClientPool.returnBrokenResource(client);
            }
            client = null;
        } finally {
            if (client != null) {
                this.registryClientPool.returnResource(client);
            }
        }


    }
}