view flys-artifacts/src/main/java/de/intevation/flys/artifacts/access/FixRealizingAccess.java @ 5779:ebec12def170

Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200
parents a929d9a9fa1e
children
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package de.intevation.flys.artifacts.access;

import de.intevation.artifacts.CallContext;
import de.intevation.flys.artifacts.FLYSArtifact;

import de.intevation.flys.artifacts.model.Segment;

import java.util.List;

import org.apache.log4j.Logger;


/** Fix-Realizing (Volmer/Ausgelagerte Wasserspiegellage) access. */
public class FixRealizingAccess
extends      FixAccess
{
    private static Logger log = Logger.getLogger(FixRealizingAccess.class);

    protected Boolean isQ;

    protected List<Segment> segments;

    public FixRealizingAccess(FLYSArtifact artifact, CallContext context) {
        super(artifact, context);
    }

    public Boolean isQ() {
        if (isQ == null) {
            isQ = getBoolean("wq_isq");
        }

        if (log.isDebugEnabled()) {
            log.debug("isQ: " + isQ);
        }

        return isQ;
    }

    public List<Segment> getSegments() {
        if (segments == null) {
            String segmentsS = getString("wq_values");
            if (segmentsS != null) {
                segments = Segment.parseSegments(segmentsS);
            }
        }
        if (log.isDebugEnabled()) {
            log.debug("segments: " + segments);
        }

        return segments;
    }
}
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