ArchivingSchedulerImpl.java

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 * the License. You may obtain a copy of the License at
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
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 * See @authors listed below
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package org.dcm4chee.archive.copy.schedule.impl;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.inject.Inject;

import org.dcm4che3.net.Device;
import org.dcm4chee.archive.ArchiveServiceReloaded;
import org.dcm4chee.archive.ArchiveServiceStarted;
import org.dcm4chee.archive.ArchiveServiceStopped;
import org.dcm4chee.archive.copy.schedule.ArchivingScheduler;
import org.dcm4chee.archive.conf.ArchiveAEExtension;
import org.dcm4chee.archive.conf.ArchiveDeviceExtension;
import org.dcm4chee.archive.conf.ArchivingRule;
import org.dcm4chee.archive.entity.ArchivingTask;
import org.dcm4chee.archive.event.StartStopReloadEvent;
import org.dcm4chee.archive.store.StoreContext;
import org.dcm4chee.archive.store.StoreSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 *
 */
@ApplicationScoped
public class ArchivingSchedulerImpl implements ArchivingScheduler {

    private static final Logger LOG = LoggerFactory.getLogger(ArchivingSchedulerImpl.class);

    @Inject
    private Device device;

    @Inject
    private ArchivingSchedulerEJB ejb;

    private int currentPollInterval;
    private ScheduledFuture<?> polling;

    public void onStoreInstance(@Observes StoreContext storeContext) {
        switch (storeContext.getStoreAction()) {
        case REPLACE:
        case RESTORE:
        case STORE:
        case UPDATEDB:
            break;
        default:
            return;
        }

        StoreSession storeSession = storeContext.getStoreSession();
        ArchiveAEExtension arcAE = storeSession.getArchiveAEExtension();
        List<ArchivingRule> archivingRules = arcAE.getArchivingRules().findArchivingRule(
                storeSession.getSourceDeviceName(),
                storeSession.getRemoteAET(),
                storeContext.getAttributes());

        for (ArchivingRule rule : archivingRules)
            ejb.onStoreInstance(storeContext, rule);
    }

    @Override
    public int scheduleReadyArchivingTasks() {
        int count = 0;
        for (;;) {
            try {
                if (scheduleNextArchivingTask() == null)
                    break;
                count++;
            } catch (IOException e) {
                LOG.error("Failed to schedule archiving task", e);
            }
        }
        return count;
    }

    @Override
    public ArchivingTask scheduleNextArchivingTask() throws IOException {
        return ejb.scheduleNextArchivingTask();
    }

    public void onArchiveServiceStarted(
            @Observes @ArchiveServiceStarted StartStopReloadEvent start) {
        startPolling(pollInterval());
    }

    public void onArchiveServiceStopped(
            @Observes @ArchiveServiceStopped StartStopReloadEvent stop) {
        stopPolling();
    }

    public void onArchiveSeriviceReloaded(
            @Observes @ArchiveServiceReloaded StartStopReloadEvent reload) {
        int pollInterval = pollInterval();
        if (currentPollInterval != pollInterval) {
            stopPolling();
            startPolling(pollInterval);
        }
    }

    private int pollInterval() {
        return device.getDeviceExtension(ArchiveDeviceExtension.class)
                .getArchivingSchedulerPollInterval();
    }

    private synchronized void startPolling(int pollInterval) {
        if (polling == null && pollInterval > 0) {
            polling = device.scheduleWithFixedDelay(
                    new Runnable() {
                        @Override
                        public void run() {
                            scheduleReadyArchivingTasks();
                        }
                    },
                    pollInterval, pollInterval, TimeUnit.SECONDS);
            currentPollInterval = pollInterval;
            LOG.info("Archiving Scheduler: start polling for scheduled Archiving tasks with interval {}s",
                    pollInterval);
        }
    }

    private synchronized void stopPolling() {
        if (polling != null) {
            polling.cancel(false);
            polling = null;
            LOG.info("Arching Scheduler: stop polling for scheduled Archiving tasks");
        }
    }
}