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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 final class MemoryEater {
-
- private SAXTransformerFactory tFactory
- = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
- private Templates replicatorTemplates;
-
- private Stats stats;
-
- private 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 {
- stats = new Stats();
- FopFactory fopFactory = FopFactory.newInstance(foFile.getParentFile().toURI());
- for (int i = 0; i < runRepeats; i++) {
- eatMemory(i, foFile, replicatorRepeats, fopFactory);
- stats.progress(i, runRepeats);
- }
- stats.dumpFinalStats();
- System.out.println(stats.getGoogleChartURL());
- }
-
- private void eatMemory(int callIndex, File foFile, int replicatorRepeats, FopFactory fopFactory)
- 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();
- 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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