/*
* 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.
*/
package org.apache.tomcat.util.bcel;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import org.junit.Assert;
import org.junit.Test;
import org.apache.tomcat.Jar;
import org.apache.tomcat.util.bcel.classfile.ClassParser;
import org.apache.tomcat.util.scan.JarFactory;
/*
* This is an absolute performance test. There is no benefit it running it as part of a standard test run so it is
* excluded due to the name starting Tester...
*
* The test also requires that the Jira lib directory has been extracted from a Jira install and copied to /tmp.
*/
public class TesterPerformance {
private static final String JAR_LOCATION = "/tmp/jira-libs";
@Test
public void testClassParserPerformance() throws IOException {
File libDir = new File(JAR_LOCATION);
String[] libs = libDir.list();
Assert.assertNotNull(libs);
Set<URL> jarURLs = new HashSet<>();
for (String lib : libs) {
if (!lib.toLowerCase(Locale.ENGLISH).endsWith(".jar")) {
continue;
}
jarURLs.add(URI.create("jar:" + new File (libDir, lib).toURI().toURL().toExternalForm() + "!/").toURL());
}
long duration = 0;
for (URL jarURL : jarURLs) {
try (Jar jar = JarFactory.newInstance(jarURL)) {
jar.nextEntry();
String jarEntryName = jar.getEntryName();
while (jarEntryName != null) {
if (jarEntryName.endsWith(".class")) {
InputStream is = jar.getEntryInputStream();
long start = System.nanoTime();
ClassParser cp = new ClassParser(is);
cp.parse();
duration += System.nanoTime() - start;
}
jar.nextEntry();
jarEntryName = jar.getEntryName();
}
}
}
System.out.println("ClassParser performance test took: " + duration + " ns");
}
}