/*
* 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 javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.stream.StreamSource;
import org.apache.commons.io.output.NullOutputStream;
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 static void eatMemory(File foFile, int replicatorRepeats) throws Exception {
SAXTransformerFactory tFactory = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
FopFactory fopFactory = FopFactory.newInstance();
File xsltFile = new File("test/xsl/fo-replicator.xsl");
Source xslt = new StreamSource(xsltFile);
Source src = new StreamSource(foFile);
Transformer transformer = tFactory.newTransformer(xslt);
transformer.setParameter("repeats", new Integer(replicatorRepeats));
OutputStream out = new NullOutputStream(); //write to /dev/nul
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, out);
Result res = new SAXResult(fop.getDefaultHandler());
transformer.transform(src, res);
System.out.println("Generated " + fop.getResults().getPageCount() + " pages.");
}
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;
if (args.length > 0) {
replicatorRepeats = Integer.parseInt(args[0]);
}
File testFile = new File("examples/fo/basic/readme.fo");
System.out.println("MemoryEater! About to replicate the test file "
+ replicatorRepeats + " times...");
if (doPrompt) {
prompt();
}
System.out.println("Processing...");
long start = System.currentTimeMillis();
eatMemory(testFile, replicatorRepeats);
long duration = System.currentTimeMillis() - start;
System.out.println("Success! Job took " + duration + " ms");
if (doPrompt) {
prompt();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}