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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/* $Id$ */
package org.apache.fop.memory;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.net.MalformedURLException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Templates;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.stream.StreamSource;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.NullOutputStream;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;
/**
* Debug tool to create and process large FO files by replicating them a specified number of times.
*/
public class MemoryEater {
private SAXTransformerFactory tFactory
= (SAXTransformerFactory)SAXTransformerFactory.newInstance();
private FopFactory fopFactory = FopFactory.newInstance();
private Templates replicatorTemplates;
private Stats stats = new Stats();
public MemoryEater() throws TransformerConfigurationException, MalformedURLException {
File xsltFile = new File("test/xsl/fo-replicator.xsl");
Source xslt = new StreamSource(xsltFile);
replicatorTemplates = tFactory.newTemplates(xslt);
}
private void eatMemory(File foFile, int runRepeats, int replicatorRepeats) throws Exception {
for (int i = 0; i < runRepeats; i++) {
eatMemory(i, foFile, replicatorRepeats);
stats.progress(i, runRepeats);
}
System.out.println(stats.getGoogleChartURL());
}
private void eatMemory(int callIndex, File foFile, int replicatorRepeats) throws Exception {
Source src = new StreamSource(foFile);
Transformer transformer = replicatorTemplates.newTransformer();
transformer.setParameter("repeats", new Integer(replicatorRepeats));
OutputStream out = new NullOutputStream(); //write to /dev/nul
try {
FOUserAgent userAgent = fopFactory.newFOUserAgent();
userAgent.setBaseURL(foFile.getParentFile().toURL().toExternalForm());
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, userAgent, out);
Result res = new SAXResult(fop.getDefaultHandler());
transformer.transform(src, res);
stats.notifyPagesProduced(fop.getResults().getPageCount());
if (callIndex == 0) {
System.out.println(foFile.getName() + " generates "
+ fop.getResults().getPageCount() + " pages.");
}
stats.checkStats();
} finally {
IOUtils.closeQuietly(out);
}
}
private static void prompt() throws IOException {
BufferedReader in = new BufferedReader(new java.io.InputStreamReader(System.in));
System.out.print("Press return to continue...");
in.readLine();
}
/**
* Main method.
* @param args the command-line arguments
*/
public static void main(String[] args) {
boolean doPrompt = true; //true if you want a chance to start the monitoring console
try {
int replicatorRepeats = 2;
int runRepeats = 1;
if (args.length > 0) {
replicatorRepeats = Integer.parseInt(args[0]);
}
if (args.length > 1) {
runRepeats = Integer.parseInt(args[1]);
}
File testFile = new File("examples/fo/basic/readme.fo");
System.out.println("MemoryEater! About to replicate the test file "
+ replicatorRepeats + " times and run it " + runRepeats + " times...");
if (doPrompt) {
prompt();
}
System.out.println("Processing...");
long start = System.currentTimeMillis();
MemoryEater app = new MemoryEater();
app.eatMemory(testFile, runRepeats, replicatorRepeats);
long duration = System.currentTimeMillis() - start;
System.out.println("Success! Job took " + duration + " ms");
if (doPrompt) {
prompt();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
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