Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/services/DischargeInfoService.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 | fe03337c8011 |
children | e4606eae8ea5 |
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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.services; import java.util.Collections; import java.util.List; import java.util.Date; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifacts.GlobalContext; import org.dive4elements.artifacts.common.ArtifactNamespaceContext; import org.dive4elements.artifacts.common.utils.XMLUtils; import org.dive4elements.river.artifacts.model.DischargeTables; import org.dive4elements.river.model.Gauge; import org.dive4elements.river.model.DischargeTable; import org.dive4elements.river.model.TimeInterval; /** * This service provides information about discharges at a defined gauge. * * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> */ public class DischargeInfoService extends D4EService { /** The logger used in this service. */ private static Logger logger = Logger.getLogger(DischargeInfoService.class); public static final String GAUGE_XPATH = "/art:gauge/text()"; public static final String RIVER_NAME_XPATH = "/art:gauge/art:river/text()"; public DischargeInfoService() { } @Override public Document doProcess( Document data, GlobalContext globalContext, CallMeta callMeta ) { if (logger.isDebugEnabled()) { logger.debug("DischargeInfoService.process"); logger.debug(XMLUtils.toString(data)); } String gaugeNumber = XMLUtils.xpathString( data, GAUGE_XPATH, ArtifactNamespaceContext.INSTANCE); String river = XMLUtils.xpathString( data, RIVER_NAME_XPATH, ArtifactNamespaceContext.INSTANCE); if (gaugeNumber == null || (gaugeNumber = gaugeNumber.trim()).length() == 0) { logger.warn("No gauge specified. Cannot return discharge info."); return XMLUtils.newDocument(); } logger.debug("Getting discharge for gauge: " + gaugeNumber + " at river: " + river); long gn; try { gn = Long.parseLong(gaugeNumber); } catch (NumberFormatException nfe) { logger.warn("Invalid gauge number. Cannot return discharge info."); return XMLUtils.newDocument(); } Gauge gauge; if (river == null || river.isEmpty()) { gauge = Gauge.getGaugeByOfficialNumber(gn); } else { gauge = Gauge.getGaugeByOfficialNumber(gn, river); } if (gauge == null) { logger.warn("No such gauge found."); return XMLUtils.newDocument(); } logger.debug("Found gauge: " + gauge.getName() + " id: " + gauge.getId()); return buildDocument(gauge); } protected Document buildDocument(Gauge gauge) { Document result = XMLUtils.newDocument(); List<DischargeTable> tables = gauge.getDischargeTables(); Collections.sort(tables); logger.debug("# of tables:" + tables.size()); Element all = result.createElement("discharges"); for (DischargeTable dt: tables) { if (dt.getKind() == DischargeTables.MASTER) { continue; } Element discharge = result.createElement("discharge"); discharge.setAttribute("description", dt.getDescription()); // Get time interval. TimeInterval ti = dt.getTimeInterval(); if (ti == null) { logger.warn("DischargeTable has no TimeInterval set!"); continue; } Date startTime = ti.getStartTime(); Date stopTime = ti.getStopTime(); if (startTime != null) { discharge.setAttribute("start", String.valueOf(startTime.getTime())); } else { continue; } if (stopTime != null) { discharge.setAttribute("end", String.valueOf(stopTime.getTime())); } else { long now = System.currentTimeMillis(); discharge.setAttribute("end", String.valueOf(now)); } String bfgId = dt.getBfgId(); if (bfgId != null) { discharge.setAttribute("bfg-id", bfgId); } all.appendChild(discharge); } result.appendChild(all); return result; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :