Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/access/FixAnalysisAccess.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 | 4930ea445bdd |
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.access; import org.dive4elements.artifactdatabase.data.StateData; import org.dive4elements.river.artifacts.D4EArtifact; import org.dive4elements.river.artifacts.model.DateRange; import java.util.Arrays; import java.util.Date; import org.apache.log4j.Logger; public class FixAnalysisAccess extends FixAccess { private static Logger log = Logger.getLogger(FixAnalysisAccess.class); protected DateRange referencePeriod; protected DateRange [] analysisPeriods; protected double [] qs; public FixAnalysisAccess(D4EArtifact artifact) { super(artifact); } /** Access the reference date period, return null in case of 'errors'. */ public DateRange getReferencePeriod() { if (referencePeriod == null) { StateData refStart = artifact.getData("ref_start"); StateData refEnd = artifact.getData("ref_end"); if (refStart == null || refEnd == null) { log.warn("missing 'ref_start' or 'ref_start' value"); return null; } try { long rs = Long.parseLong((String)refStart.getValue()); long re = Long.parseLong((String)refEnd .getValue()); if (rs > re) { long t = rs; rs = re; re = t; } Date from = new Date(rs); Date to = new Date(re); referencePeriod = new DateRange(from, to); } catch (NumberFormatException nfe) { log.warn("ref_start or ref_end is not an integer."); } } return referencePeriod; } public DateRange [] getAnalysisPeriods() { if (analysisPeriods == null) { analysisPeriods = getDateRange("ana_data"); } return analysisPeriods; } /** * @return DateRange object ranging from eldest to youngest date * of analysis and reference periods. */ public DateRange getDateRange() { DateRange refP = getReferencePeriod(); if (refP == null) { return null; } Date from = refP.getFrom(); Date to = refP.getTo(); DateRange[] rs = getAnalysisPeriods(); for (DateRange r: rs) { if (r.getFrom().before(from)) { from = r.getFrom(); } if (r.getTo().after(to)) { to = r.getTo(); } } return new DateRange(from, to); } public double [] getQs() { if (qs == null) { qs = getDoubleArray("qs"); } if (log.isDebugEnabled() && qs != null) { log.debug("qs: " + Arrays.toString(qs)); } return qs; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :