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package eu.dnetlib.openaire.directindex.api;
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import java.io.StringReader;
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import java.util.Iterator;
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import java.util.List;
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import com.mongodb.*;
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import eu.dnetlib.miscutils.datetime.DateUtils;
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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.io.SAXReader;
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import org.springframework.beans.factory.annotation.Required;
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/**
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* Created by michele on 11/11/15.
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*/
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public class RecentResultsQueue implements Iterable<String> {
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private static final Log log = LogFactory.getLog(RecentResultsQueue.class);
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private DB db;
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private String collection;
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public void init() {
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if (!db.collectionExists(collection)) {
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log.info(String.format("creating collection %s", collection));
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db.createCollection(collection, new BasicDBObject());
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}
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}
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@Override
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public Iterator<String> iterator() {
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final DBCursor cursor = db.getCollection(collection).find();
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return new Iterator<String>() {
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@Override
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public boolean hasNext() {
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return cursor.hasNext();
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}
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@Override
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public String next() {
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final DBObject obj = cursor.next();
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return ((obj != null) && obj.containsField("record")) ? obj.get("record").toString() : "";
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}
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@Override
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public void remove() {
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throw new RuntimeException("NOT IMPLEMENTED");
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}
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};
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}
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synchronized public void add(final String oaf) throws Exception {
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final String id = (new SAXReader()).read(new StringReader(oaf)).valueOf("//*[local-name() = 'objIdentifier']");
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log.info("Saving record " + id + " in db: " + db.getName() + ", coll: " + collection);
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final DBCollection coll = db.getCollection(collection);
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final DBObject obj = BasicDBObjectBuilder.start()
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.append("id", id)
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.append("record", oaf)
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.append("date", DateUtils.now())
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.get();
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coll.update(new BasicDBObject("id", id), obj, true, false);
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}
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public void remove(final List<String> list) {
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final DBCollection coll = db.getCollection(collection);
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for (final String id : list) {
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coll.remove(new BasicDBObject("id", id));
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}
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}
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public void remove(final String... ids) {
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final DBCollection coll = db.getCollection(collection);
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for (final String id : ids) {
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coll.remove(new BasicDBObject("id", id));
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}
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}
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public DB getDb() {
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return db;
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}
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@Required
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public void setDb(final DB db) {
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this.db = db;
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}
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public String getCollection() {
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return collection;
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}
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@Required
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public void setCollection(final String collection) {
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this.collection = collection;
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}
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}
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