Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/access/SQRelationAccess.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 | d8d0caaf60a2 |
children | 17db08570637 |
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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 java.util.Date; import java.util.List; import org.apache.log4j.Logger; import org.dive4elements.river.artifacts.D4EArtifact; import org.dive4elements.river.artifacts.model.DateRange; import org.dive4elements.river.model.MeasurementStation; public class SQRelationAccess extends RiverAccess { private static Logger log = Logger.getLogger(SQRelationAccess.class); protected Double location; protected DateRange period; protected Double outliers; private String method; protected MeasurementStation measurementStation; public SQRelationAccess() { } public SQRelationAccess(D4EArtifact artifact) { super(artifact); } public Double getLocation() { if (location == null) { // XXX: The parameter name suggests plural!? location = getDouble("ld_locations"); } if (log.isDebugEnabled()) { log.debug("location: " + location); } return location; } public DateRange getPeriod() { if (period == null) { Long start = getLong("start"); Long end = getLong("end"); if (start != null && end != null) { period = new DateRange(new Date(start), new Date(end)); } } return period; } public Double getOutliers() { if (outliers == null) { outliers = getDouble("outliers"); } if (log.isDebugEnabled()) { log.debug("outliers: " + outliers); } return outliers; } public String getOutlierMethod() { if (method == null) { method = getString("outlier-method"); } if (log.isDebugEnabled()) { log.debug("outlier-method: " + method); } return method; } public String getMeasurementStationName() { MeasurementStation station = getMeasurementStation(); return station == null ? null : station.getName(); } public String getMeasurementStationGaugeName() { MeasurementStation station = getMeasurementStation(); return station == null ? null : station.getGaugeName(); } public MeasurementStation getMeasurementStation() { if (measurementStation != null) { return measurementStation; } List<MeasurementStation> candidates = MeasurementStation.getStationsAtKM( getRiverName(), getLocation()); if (candidates != null && !candidates.isEmpty()) { // Just take the first one as we only use the name // and that "should" be unique at the location measurementStation = candidates.get(0); } return measurementStation; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :