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claudio.at
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package eu.dnetlib.functionality.index;
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sandro.lab
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import java.io.StringReader;
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sandro.lab
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import java.util.List;
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claudio.at
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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sandro.lab
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import javax.annotation.Resource;
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claudio.at
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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.dom4j.Document;
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import org.dom4j.DocumentException;
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import org.dom4j.Element;
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import org.dom4j.Node;
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import org.dom4j.io.SAXReader;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Required;
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import eu.dnetlib.enabling.actions.AbstractSubscriptionAction;
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import eu.dnetlib.functionality.index.utils.MetadataReference;
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import eu.dnetlib.functionality.index.utils.MetadataReferenceFactory;
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import eu.dnetlib.functionality.index.utils.ServiceTools;
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import eu.dnetlib.miscutils.dom4j.XPathHelper;
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claudio.at
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/**
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* MdFormatNotificationHandler updates index schema in response to metadata formats modifications.
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alessia.ba
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*
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claudio.at
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* @author claudio
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*
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claudio.at
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*/
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public class MdFormatNotificationHandler extends AbstractSubscriptionAction {
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/**
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* Logger.
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*/
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private static final Log log = LogFactory.getLog(MdFormatNotificationHandler.class); // NOPMD by marko on 11/24/08 5:02 PM
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@Resource
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private transient MetadataReferenceFactory mdFactory;
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@Autowired
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private IndexServerDAOMap indexServerDAOMap;
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@Autowired
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private ServiceTools serviceTools;
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private Executor executor = Executors.newSingleThreadExecutor();
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private final transient ThreadLocal<SAXReader> domFactory = new ThreadLocal<SAXReader>() {
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@Override
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protected SAXReader initialValue() {
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return new SAXReader();
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}
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};
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claudio.at
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.tools.Enableable
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*/
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private boolean enabled;
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@Override
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public void notified(final String subscrId, final String topic, final String rsId, final String profile) {
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if (!topic.startsWith(getTopicPrefix()) || !isEnabled()) return;
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executor.execute(new Runnable() {
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@Override
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public void run() {
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try {
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final Document doc = parse(profile);
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final Node formatNode = doc.selectSingleNode("//CONFIGURATION/NAME/text()");
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if ((formatNode != null) && !formatNode.asXML().isEmpty()) {
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final String format = formatNode.asXML();
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final Iterable<Element> layouts = XPathHelper.selectElements(doc, "//STATUS/LAYOUTS/LAYOUT");
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final Node interpretationNode = doc.selectSingleNode("//CONFIGURATION/INTERPRETATION/text()");
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final String interpretation = interpretationNode.asXML();
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log.info("found a change in mdFormat: " + format);
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for (Element element : layouts) {
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final String layout = element.attributeValue("name");
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// updates index schema based on mdFormat and layout
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final MetadataReference mdRef = mdFactory.getMetadata(format, layout, interpretation);
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final Document fields = parse(element.selectSingleNode("./FIELDS").asXML());
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List<String> backends = serviceTools.getBackendIds(mdRef);
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if ((backends == null) || backends.isEmpty()) {
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log.warn("There is no backendId in profiles for mdref " + mdRef);
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}
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for (String backendId : backends) {
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IndexServerDAO idxDao = indexServerDAOMap.getIndexServerDAO(backendId);
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if (idxDao == null) throw new RuntimeException("No index found for the mdformat " + mdRef);
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log.info("Found index DAO which serve this mdFormat");
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idxDao.updateIndexCollection(mdRef, fields);
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}
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}
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}
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log.info("Upload schema completed");
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} catch (Exception e) {
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throw new RuntimeException(e); // NOPMD
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}
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}
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claudio.at
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});
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claudio.at
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}
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@Override
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@Required
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public void setEnabled(final boolean enabled) {
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this.enabled = enabled;
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}
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/**
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* Helper method, parses an xml string.
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alessia.ba
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*
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* @param source
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* the xml.
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* @return the parsed xml.
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* @throws DocumentException
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* could happen
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*/
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private Document parse(final String source) throws DocumentException {
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return domFactory.get().read(new StringReader(source));
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}
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@Override
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public boolean isEnabled() {
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return enabled;
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}
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}
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