Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/FlowVelocityModelArtifact.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> |
---|---|
date | Wed, 30 Oct 2013 15:26:21 +0100 |
parents | 9eef5004ff21 |
children | 00950f79b0d9 |
line wrap: on
line source
/* 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.artifactdatabase.state.DefaultOutput; import org.dive4elements.artifactdatabase.state.Facet; import org.dive4elements.artifactdatabase.state.FacetActivity; import org.dive4elements.artifactdatabase.state.State; import org.dive4elements.artifacts.Artifact; import org.dive4elements.artifacts.ArtifactFactory; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifacts.common.utils.XMLUtils; import org.dive4elements.river.artifacts.model.Calculation; import org.dive4elements.river.artifacts.model.CalculationResult; import org.dive4elements.river.artifacts.states.DefaultState.ComputeType; import org.dive4elements.river.model.FlowVelocityModel; import org.dive4elements.river.artifacts.model.FlowVelocityCalculation; import org.dive4elements.river.artifacts.model.FlowVelocityData; import org.dive4elements.river.artifacts.model.FlowVelocityFacet; import org.dive4elements.river.artifacts.states.StaticState; import org.dive4elements.river.artifacts.model.FacetTypes; /** Artifact to access flow velocity models. */ public class FlowVelocityModelArtifact extends StaticD4EArtifact implements FacetTypes { /** The logger for this class. */ private static Logger logger = Logger.getLogger(FlowVelocityModelArtifact.class); /** Artifact key name. */ private static final String NAME = "flowvelocitymodel"; /** Spawn only inactive facets. */ static { // TODO: Move to configuration. FacetActivity.Registry.getInstance() .register(NAME, FacetActivity.INACTIVE); } /** Need to give the state an id. */ public static final String STATIC_STATE_NAME = "state.flowvelocitymodel.static"; /** One and only state to be in. */ protected transient State state = null; protected String DATA_ID = "ID"; /** * Trivial Constructor. */ public FlowVelocityModelArtifact() { logger.debug("FlowVelocityModelArtifact.FlowVelocityModelArtifact"); } /** Get artifact key name. */ @Override public String getName() { return NAME; } private Object getFlowVelocity() { logger.debug("FlowVelocityModelArtifact.getFlowVelocity"); Integer id = getDataAsInteger(DATA_ID); FlowVelocityModel model = FlowVelocityModel.getModel(id); FlowVelocityData data = new FlowVelocityData(); // TODO rangeaccess FlowVelocityCalculation.prepareData(data, model, 0d, 1000d); return new CalculationResult( new FlowVelocityData[] {data} , new Calculation()); } /** Create a static state. */ private State newState() { return new StaticState(STATIC_STATE_NAME) { public Object staticCompute(List<Facet> facets) { return getFlowVelocity(); } }; } /** Create a new state with bogus output. */ protected State spawnState() { state = newState(); List<Facet> fs = getFacets(STATIC_STATE_NAME); DefaultOutput output = new DefaultOutput( "general", "general", "image/png", fs, "chart"); state.getOutputs().add(output); return state; } /** * Gets called from factory, to set things up. */ @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.debug("FlowVelocityModelArtifact.setup"); state = newState(); if (logger.isDebugEnabled()) { logger.debug(XMLUtils.toString(data)); } List<Facet> fs = new ArrayList<Facet>(); String code = getDatacageIDValue(data); if (code != null) { String name = FlowVelocityModel.getModelDescription(Integer.valueOf(code)); Facet facet = new FlowVelocityFacet( 0, FLOW_VELOCITY_MAINCHANNEL, "mainchannel " + name, ComputeType.ADVANCE, state.getID(), "hash" ); fs.add(facet); Facet tauFacet = new FlowVelocityFacet( 0, FLOW_VELOCITY_TAU, "tau " + name, ComputeType.ADVANCE, state.getID(), "hash" ); fs.add(tauFacet); Facet qFacet = new FlowVelocityFacet( 0, FLOW_VELOCITY_DISCHARGE, "Q " + name, ComputeType.ADVANCE, state.getID(), "hash" ); fs.add(qFacet); Facet tFacet = new FlowVelocityFacet( 0, FLOW_VELOCITY_TOTALCHANNEL, "total "+ name, ComputeType.ADVANCE, state.getID(), "hash" ); fs.add(tFacet); addFacets(state.getID(), fs); addStringData(DATA_ID, code); } else { logger.error("No id given."); } spawnState(); super.setup(identifier, factory, context, callMeta, data); } /** * 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(getState()); return states; } /** * Get the "current" state (there is but one). * @param cc ignored. * @return the "current" (only possible) state. */ @Override public State getCurrentState(Object cc) { return getState(); } /** * Get the only possible state. * @return the state. */ protected State getState() { return getState(null, null); } /** * Get the state. * @param context ignored. * @param stateID ignored. * @return the state. */ @Override protected State getState(Object context, String stateID) { return (state != null) ? state : spawnState(); } /** * Called via setup. Overridden to avoid cloning all data. * * @param artifact The master-artifact. */ @Override protected void initialize( Artifact artifact, Object context, CallMeta meta) { logger.debug("FlowVelocityModelArtifact.initialize"); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :