eu.stratosphere.client.web.PlanDisplayServlet Maven / Gradle / Ivy

Go to download
/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 **********************************************************************************************************************/

package eu.stratosphere.client.web;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

public class PlanDisplayServlet extends GUIServletStub {
	
	/**
	 * Serial UID for serialization interoperability.
	 */
	private static final long serialVersionUID = 3610115341264927614L;
	
	
	private final int runtimeVisualizationPort;
	
	private String runtimeVisURL;

	/**
	 * Default constructor. Sets up all CSS and JS files for the header.
	 */
	public PlanDisplayServlet(int runtimePort) {
		super("Stratosphere Query Interface - Query Plan");
		
		this.runtimeVisualizationPort = runtimePort;

		addStyleSheet("css/js-graph-it.css");
		addStyleSheet("css/pactgraphs.css");

		addJavascriptFile("js/js-graph-it.js");
		addJavascriptFile("js/progressbar.js");
		addJavascriptFile("js/pactgraph.js");
	}

	@Override
	public void printPage(PrintWriter writer, Map parameters, HttpServletRequest req) throws IOException {
		String[] x = parameters.get("id");
		String uid = (x != null && x.length >= 1) ? x[0] : null;

		x = parameters.get("suspended");
		String suspend = (x != null && x.length >= 1) ? x[0] : null;

		// check, if all parameters are there
		if (uid == null || suspend == null) {
			writer.println("    ");
			writer.println("      Parameters identifying the plan and the suspension strategy are missing.");
			writer.println("    ");
			return;
		}
		
		if (this.runtimeVisURL == null) {
			try {
				URI request = new URI(req.getRequestURL().toString());
				URI vizURI = new URI(request.getScheme(), null, request.getHost(), runtimeVisualizationPort, null, null, null);
				this.runtimeVisURL = vizURI.toString();
				System.out.println(this.runtimeVisURL);
			} catch (URISyntaxException e) {
				; // ignore and simply do not forward
			}
		}
		
		boolean suspended = Boolean.parseBoolean(suspend);

		// write the canvas for the graph area
		writer.println("    \n"
					+ "      \n"
					+ "        \n"
					+ "      
\n" + "      \n"
					+ "        ");
		if (suspended) {
			writer.println("        ");
		}
		writer.println("      
\n" + "    ");

		// write the canvas for the properties area
		writer.println("    \n"
			+ "      Click a node to show the properties...
\n" + "    ");

		// write the page initialization code
		writer.println("    ");
	}
}