/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* (c) 2001 - 2013 OpenPlans
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.wms.animate;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import javax.media.jai.RenderedImageList;
import org.apache.commons.beanutils.BeanUtils;
import org.geoserver.ows.Dispatcher;
import org.geoserver.ows.util.CaseInsensitiveMap;
import org.geoserver.ows.util.KvpUtils;
import org.geoserver.wms.DefaultWebMapService;
import org.geoserver.wms.GetMapRequest;
import org.geoserver.wms.MapProducerCapabilities;
import org.geoserver.wms.WMS;
import org.geoserver.wms.WebMapService;
import org.geoserver.wms.map.GetMapKvpRequestReader;
import org.geoserver.wms.map.RenderedImageMap;
import org.geoserver.wms.map.RenderedImageMapResponse;
/**
* The Frame Visitor contains the logic to produce frame images.<br/>
* The "visit" method initializes the runnables and the animatorExecutor service, while
* the "produce" method runs the tasks and generated the frames images.
* @author Alessio Fabiani, GeoSolutions S.A.S., alessio.fabiani@geo-solutions.it
* @author Andrea Aime, GeoSolutions S.A.S., andrea.aime@geo-solutions.it
*/
public class FrameCatalogVisitor {
/**
* total number of available frames for this visitor
*/
int framesNumber;
/**
* the list of runnables to be executed
*/
List<Future<RenderedImage>> tasks;
/**
* Adds a new visitor to the runnables list and initializes the animatorExecutor service is not yet initialied.
* @param request
* @param wms
* @param wmsConfiguration
* @param aparam
* @param avalue
*/
public void visit(final GetMapRequest request, WebMapService wms, WMS wmsConfiguration, String aparam, String avalue) {
if (this.tasks == null) {
this.tasks = new LinkedList<Future<RenderedImage>>();
}
FrameLoader loader = new FrameLoader(request, wms, wmsConfiguration, aparam, avalue);
final FutureTask<RenderedImage> task = new FutureTask<RenderedImage>(loader);
this.tasks.add(task);
this.framesNumber++;
// run the loading in this thread
wmsConfiguration.getAnimatorExecutorService().execute(task);
}
/**
* Invokes the Executor service and produces the frames images.
* @param wmsConfiguration
*
* @throws IOException
*/
public RenderedImageList produce(WMS wmsConfiguration) throws IOException {
List<RenderedImage> images = new ArrayList<RenderedImage>();
long gifAnimatedSize = 0;
for (Future<RenderedImage> future : tasks) {
RenderedImage image = null;
try {
image = future.get();
} catch (InterruptedException e) {
dispose();
throw new IOException(e);
} catch (ExecutionException e) {
dispose();
throw new IOException(e);
}
if (image == null) {
continue;
}
// collect the images
gifAnimatedSize += getImageSizeInBytes(image);
if (wmsConfiguration.getMaxRenderingSize() != null
&& gifAnimatedSize >= wmsConfiguration.getMaxRenderingSize()) {
dispose();
throw new IOException("Max rendering size exceed!");
}
images.add(image);
}
if (images == null || images.size() == 0) {
dispose();
throw new IOException("Empty list of frames.");
}
dispose();
return new RenderedImageList(images);
}
private long getImageSizeInBytes(RenderedImage image) {
int tileWidth = image.getTileWidth();
int tileLength = image.getNumXTiles();
int numBands = image.getSampleModel().getNumBands();
int[] sampleSize = image.getSampleModel().getSampleSize();
return (long) Math.ceil(2 * tileWidth * tileLength * numBands * (sampleSize[0] / 8.0));
}
/**
* Suddenly stops the Executor service and clear instantiated visitors.
*/
private void dispose() {
this.framesNumber = 0;
if (this.tasks != null)
this.tasks.clear();
this.tasks = null;
}
}
/**
* FrameLoader Callable task.
*
* @author Alessio
*
*/
class FrameLoader implements Callable<RenderedImage> {
/**
* The default output format for each frame if not specified in the request
*/
private static final String GIF_FORMAT = "image/gif";
private GetMapRequest request;
private WebMapService wms;
private WMS wmsConfiguration;
private String aparam;
private String avalue;
/**
* Default constructor.
*
* @param request
* @param wms
* @param wmsConfiguration
* @param aparam
* @param avalue
*/
public FrameLoader(GetMapRequest request, WebMapService wms, WMS wmsConfiguration, String aparam, String avalue) {
this.request = request;
this.wms = wms;
this.wmsConfiguration = wmsConfiguration;
this.aparam = aparam;
this.avalue = avalue.replaceAll("\\\\,", ",");
}
@Override
public RenderedImage call() throws Exception {
org.geoserver.wms.WebMap wmsResponse;
// Making a shallow copy of the original request and replacing param's values
GetMapRequest frameRequest = replaceRequestParams(this.request, this.aparam, this.avalue);
// set rest of the wms defaults
frameRequest = DefaultWebMapService.autoSetMissingProperties(frameRequest);
// Setup Frame OUTputFormat
String outFormat = frameRequest.getFormat();
// the capabilities of this produce are actually linked to the map response that is going to
// be used, this class just generates a rendered image
final Collection<RenderedImageMapResponse> responses = this.wmsConfiguration.getAvailableMapResponses();
for(RenderedImageMapResponse response: responses){
if (response.getOutputFormats().contains(outFormat)) {
MapProducerCapabilities cap=response.getCapabilities(outFormat);
if(cap!=null && cap.getFramesMimeType()!=null) {
frameRequest.setFormat(cap.getFramesMimeType());
} else {
frameRequest.setFormat(GIF_FORMAT);
}
}
}
wmsResponse = this.wms.getMap(frameRequest);
return ((RenderedImageMap) wmsResponse).getImage();
}
/**
* Replacing WMS Request parameter's value
*
* @param theRequest
* @param param
* @param value
*
* @throws Exception
*/
private static GetMapRequest replaceRequestParams(GetMapRequest theRequest, String param,
String value) throws Exception {
// look for the GetMapRequest reader
GetMapKvpRequestReader kvpRequestReader = (GetMapKvpRequestReader) Dispatcher.findKvpRequestReader(GetMapRequest.class);
// clone the original request object using the reflection
GetMapRequest request = (GetMapRequest) BeanUtils.cloneBean(theRequest);
// looking for composite parameters like env:color or viewparams:param ...
Map<String, String> rawKvp = new CaseInsensitiveMap(new HashMap<String, String>(theRequest.getRawKvp()));
if (param.contains(":")) {
// going to replace composite param values for each frame in the KVP map
String compositeParamKey = param.split(":")[0].toUpperCase();
String simpleParamKey = param.split(":")[1].toUpperCase();
List<String> kvps = null;
if (rawKvp.get(compositeParamKey) != null) {
kvps = KvpUtils.escapedTokens(rawKvp.get(compositeParamKey), ';');
// purge old value
Iterator<String> it = kvps.iterator();
while (it.hasNext()) {
String k = it.next().toUpperCase();
if (k.toUpperCase().startsWith(simpleParamKey)) {
it.remove();
}
}
} else {
kvps = new ArrayList<String>();
}
// insert the right one
kvps.add(simpleParamKey + ":" + value);
// merge back to the composite value
rawKvp.remove(compositeParamKey);
rawKvp.put(compositeParamKey, mergeParams(kvps));
} else {
// just a simple plain request parameter... replacing it on the KVP map
// purge old value
if (rawKvp.containsKey(param)) {
rawKvp.remove(param);
}
// insert the frame one
rawKvp.put(param, value);
}
// setting up the right RAW-KVP map for the single frame request
request.setRawKvp(rawKvp);
// building the request KVP map using the reflection
HashMap<String, String> kvp = new HashMap<String, String>(rawKvp);
KvpUtils.parse(kvp);
// finally building the request
request = kvpRequestReader.read(new GetMapRequest(), kvp, rawKvp);
// add the param value for text decorations to use
request.getEnv().put("avalue", value);
return request;
}
private static String mergeParams(List<String> kvps) {
StringBuilder sb = new StringBuilder();
for (String k : kvps) {
sb.append(k).append(";");
}
sb.deleteCharAt(sb.lastIndexOf(";"));
return sb.toString();
}
}