Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/ExternalWMSArtifact.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 | 8d5ca5175038 |
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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; import java.util.ArrayList; import java.util.List; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.dive4elements.artifacts.Artifact; import org.dive4elements.artifacts.ArtifactFactory; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifactdatabase.state.DefaultOutput; import org.dive4elements.artifactdatabase.state.Facet; import org.dive4elements.artifactdatabase.state.State; import org.dive4elements.river.artifacts.states.WMSBackgroundState; public class ExternalWMSArtifact extends StaticD4EArtifact { public static final String NAME = "external_wms"; private static final Logger logger = Logger.getLogger(ExternalWMSArtifact.class); @Override public String getName() { return NAME; } @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.info("ExternalWMSArtifact.setup"); super.setup(identifier, factory, context, callMeta, data); String ids = getDatacageIDValue(data); if (ids != null && ids.length() > 0) { addStringData("ids", ids); } else { throw new IllegalArgumentException("No attribute 'ids' found!"); } List<Facet> fs = new ArrayList<Facet>(); WMSBackgroundState s = (WMSBackgroundState) getCurrentState(context); s.computeInit(this, hash(), context, callMeta, fs); if (!fs.isEmpty()) { addFacets(getCurrentStateId(), fs); } } @Override protected void initialize( Artifact artifact, Object context, CallMeta callMeta) { // do nothing } @Override public State getCurrentState(Object cc) { State s = new ExternalWMSState(this); List<Facet> fs = getFacets(getCurrentStateId()); DefaultOutput o = new DefaultOutput( "floodmap", "floodmap", "image/png", fs, "map"); s.getOutputs().add(o); return s; } /** * Get a list containing the one and only State. * @param context ignored. * @return list with one and only state. */ @Override protected List<State> getStates(Object context) { ArrayList<State> states = new ArrayList<State>(); states.add(getCurrentState(context)); return states; } public static class ExternalWMSState extends WMSBackgroundState { protected ExternalWMSArtifact artifact; protected String ids; public ExternalWMSState(ExternalWMSArtifact artifact) { super(); this.artifact = artifact; } protected String getIds() { if (ids == null || ids.length() == 0) { ids = artifact.getDataAsString("ids"); } return ids; } @Override protected String getFacetType() { return FLOODMAP_EXTERNAL_WMS; } @Override protected String getSrid() { return ""; } @Override protected String getUrl() { String ids = getIds(); String[] parts = ids.split(";"); return parts[0]; } @Override protected String getLayer() { String ids = getIds(); String[] parts = ids.split(";"); return parts[1]; } @Override protected String getTitle(CallMeta meta) { String ids = getIds(); String[] parts = ids.split(";"); return parts[2]; } } // end of class ExternalWMSState } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :