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package eu.dnetlib.enabling.is.sn;
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import javax.xml.xpath.XPathExpressionException;
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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.w3c.dom.Document;
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import eu.dnetlib.enabling.is.sn.resourcestate.ResourceStateNotificationDetector;
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import eu.dnetlib.enabling.tools.DOMOpaqueResource;
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import eu.dnetlib.enabling.tools.OpaqueResource;
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import eu.dnetlib.xml.database.LoggingTrigger;
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/**
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* This trigger generates notification events for the subscription notification layer.
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*
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* @author marko
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*
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*/
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public class NotificationTriggerImpl extends LoggingTrigger {
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(NotificationTriggerImpl.class); // NOPMD by marko on 11/24/08 5:02 PM
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/**
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* notification detector to notify on events.
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*/
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private ResourceStateNotificationDetector<OpaqueResource> detector;
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/**
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* {@inheritDoc}
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* @see eu.dnetlib.xml.database.LoggingTrigger#created(java.lang.String, java.lang.String, org.w3c.dom.Document)
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*/
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@Override
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public void created(final String file, final String collection, final Document newDoc) {
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super.created(file, collection, newDoc);
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try {
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getDetector().resourceCreated(new DOMOpaqueResource(newDoc));
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} catch (XPathExpressionException e) {
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log.fatal("cannot detect notification because of xpath error; notification possibly missed", e);
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}
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}
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/**
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* {@inheritDoc}
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* @see eu.dnetlib.xml.database.LoggingTrigger#deleted(java.lang.String, java.lang.String, org.w3c.dom.Document)
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*/
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@Override
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public void deleted(final String file, final String collection, final Document oldDoc) {
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super.deleted(file, collection, oldDoc);
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try {
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getDetector().resourceDeleted(new DOMOpaqueResource(oldDoc));
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} catch (XPathExpressionException e) {
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log.fatal("cannot detect notification because of xpath error; notification possibly missed", e);
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}
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}
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/**
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* {@inheritDoc}
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* @see eu.dnetlib.xml.database.LoggingTrigger#updated(java.lang.String, java.lang.String, org.w3c.dom.Document, org.w3c.dom.Document)
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*/
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@Override
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public void updated(final String file, final String collection, final Document oldDoc, final Document newDoc) {
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super.updated(file, collection, oldDoc, newDoc);
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try {
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getDetector().resourceUpdated(new DOMOpaqueResource(oldDoc), new DOMOpaqueResource(newDoc));
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} catch (XPathExpressionException e) {
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log.fatal("cannot detect notification because of xpath error; notification possibly missed", e);
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}
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}
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public ResourceStateNotificationDetector<OpaqueResource> getDetector() {
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return detector;
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}
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public void setDetector(final ResourceStateNotificationDetector<OpaqueResource> detector) {
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this.detector = detector;
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}
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}
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