nl.vpro.domain.classification.CachedURLClassificationServiceImpl Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of media-classification Show documentation

The classes needed for the 'classification' service used in POMS. This os based on ClassificationScheme xml's as provided by EBU. It at the moment is only used for genres, but it could in principle accommodate other types of classification based on a fixed list.

There is a newer version: 8.3.1

Show newest version

package nl.vpro.domain.classification;

import java.net.URI;
import java.time.Duration;
import java.time.Instant;
import java.util.SortedMap;

import jakarta.inject.Inject;
import jakarta.inject.Named;

/**
 * If not using spring for ehcache configuration, this can be used to cache 5 minutes (or some other interval).
 * @author Michiel Meeuwissen
 * @since 3.2
 */
public class CachedURLClassificationServiceImpl extends URLClassificationServiceImpl {


    Instant lastCheck = Instant.EPOCH;

    private Duration checkInterval = Duration.ofSeconds(300);

    private long hits = 0;
    private long misses = 0;

    @Inject
    public CachedURLClassificationServiceImpl(
        @Named("npo-pages_publisher.baseUrl") String url) {
        this(URI.create(url + (url.endsWith("/") ? "": "/") + "schema/classification"));
    }

    public CachedURLClassificationServiceImpl(URI url) {
        super(url);
    }

    @Override
    protected synchronized SortedMap getTermsMap() {
        if (terms == null || Instant.now().isAfter(lastCheck.plus(checkInterval))) {
            lastCheck = Instant.now();
            misses++;
            return super.getTermsMap();
        }
        hits++;
        return terms;
    }

    public long getCheckIntervalInSeconds() {
        return checkInterval.getSeconds();
    }

    public void setCheckIntervalInSeconds(long checkIntervalInSeconds) {
        this.checkInterval = Duration.ofSeconds(checkIntervalInSeconds);
    }

    public void setCheckInterval(Duration duration) {
        this.checkInterval = duration;
    }
    public Duration getCheckInterval() {
        return checkInterval;
    }

    public long getHits() {
        return hits;
    }

    public long getMisses() {
        return misses;
    }
}