Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/model/Calculation5.java @ 7471:fff862f4ef76
Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time.
Hopefully this improves the overall speed of loading data from the datacage.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Wed, 30 Oct 2013 15:26:21 +0100 |
parents | af13ceeba52a |
children | 0a5239a1e46e |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.model; import org.dive4elements.artifacts.CallContext; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.river.utils.Formatter; import java.text.NumberFormat; import java.util.ArrayList; import java.util.Map; import org.apache.log4j.Logger; public class Calculation5 extends Calculation { private static Logger log = Logger.getLogger(Calculation5.class); protected double startKm; protected double [] endKms; public Calculation5() { } public Calculation5(double startKm, double [] endKms) { this.startKm = startKm; this.endKms = endKms; } public CalculationResult calculate( WstValueTable wst, Map<Double, Double> kms2gaugeDatums, CallContext context ) { ArrayList<WWQQ> results = new ArrayList<WWQQ>(); int numProblems = numProblems(); CallMeta meta = context.getMeta(); for (double endKm: endKms) { double [][] wws = wst.relateWs(startKm, endKm, this); int newNumProblems = numProblems(); if (wws.length == 4) { WWQQ wwqq = new WWQQ( generateName(meta, startKm, endKm), startKm, kms2gaugeDatums.get(startKm), wws[0], wws[1], endKm, kms2gaugeDatums.get(endKm), wws[2], wws[3]); if (newNumProblems > numProblems) { wwqq.removeNaNs(); } results.add(wwqq); } numProblems = newNumProblems; } return new CalculationResult( results.toArray(new WWQQ[results.size()]), this); } protected static String generateName( CallMeta meta, double startKm, double endKm ) { NumberFormat nf = Formatter.getCalculationKm(meta); return "W(km " + nf.format(startKm) + ") ~ W(km " + nf.format(endKm) + ")"; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :