Mercurial > dive4elements > river
diff flys-client/src/main/java/de/intevation/flys/client/server/ChartOutputServiceImpl.java @ 78:9ca5160cf080
Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
flys-client/trunk@1584 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Mon, 28 Mar 2011 10:45:45 +0000 |
parents | |
children | 7ea004d0ffbc |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/server/ChartOutputServiceImpl.java Mon Mar 28 10:45:45 2011 +0000 @@ -0,0 +1,63 @@ +package de.intevation.flys.client.server; + +import java.io.OutputStream; +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; + +import org.w3c.dom.Document; + +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +import de.intevation.artifacts.httpclient.http.HttpClient; +import de.intevation.artifacts.httpclient.http.HttpClientImpl; +import de.intevation.artifacts.httpclient.objects.Artifact; +import de.intevation.artifacts.httpclient.utils.ArtifactProtocolUtils; + + +/** + * This service is used to request a chart from the artifact server. The + * response is directed directly to the output stream, so the image that is + * retrieved is displayed in the UI afterwards. + * + * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> + */ +public class ChartOutputServiceImpl +extends HttpServlet +{ + public void doGet(HttpServletRequest req, HttpServletResponse resp) { + System.out.println("ChartOutputServiceImpl.doGet"); + + try { + OutputStream out = resp.getOutputStream(); + + String serverUrl = req.getParameter("server"); + String uuid = req.getParameter("uuid"); + String hash = req.getParameter("hash"); + String width = req.getParameter("width"); + String height = req.getParameter("height"); + String target = req.getParameter("target"); + String mimeType = "image/png"; + + Map opts = new HashMap(); + opts.put("width", width); + opts.put("height", height); + opts.put("mimeType", mimeType); + opts.put("points", "false"); + + Document chart = ArtifactProtocolUtils.createChartDocument( + new Artifact(hash, uuid), opts); + + HttpClient client = new HttpClientImpl(serverUrl); + client.out(new Artifact(uuid, hash), chart, target, out); + + out.close(); + out.flush(); + } + catch (IOException ioe) { + System.err.println(ioe.getMessage()); + } + } +}