1 /*
   2  * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.openjdk.bench.javax.tools;
  24 
  25 import org.openjdk.jmh.annotations.Benchmark;
  26 import org.openjdk.jmh.annotations.BenchmarkMode;
  27 import org.openjdk.jmh.annotations.Mode;
  28 import org.openjdk.jmh.annotations.OutputTimeUnit;
  29 import org.openjdk.jmh.annotations.Scope;
  30 import org.openjdk.jmh.annotations.Setup;
  31 import org.openjdk.jmh.annotations.State;
  32 
  33 import javax.tools.JavaCompiler;
  34 import javax.tools.SimpleJavaFileObject;
  35 import javax.tools.StandardJavaFileManager;
  36 import javax.tools.ToolProvider;
  37 import java.net.URI;
  38 import java.util.ArrayList;
  39 import java.util.List;
  40 import java.util.concurrent.TimeUnit;
  41 
  42 @BenchmarkMode(Mode.AverageTime)
  43 @OutputTimeUnit(TimeUnit.MILLISECONDS)
  44 @State(Scope.Thread)
  45 public class Javac {
  46     private List<JavaSourceFromString> compilationUnits;
  47     private JavaCompiler compiler;
  48     private StandardJavaFileManager fileManager;
  49 
  50     @Setup
  51     public void prepare() {
  52         String helloWorld = "class Apan {   \n" + "  public static void main(String args[]) {\n"
  53                 + "     System.out.println(\"hej apa\");\n" + "  }\n" + "}\n";
  54 
  55         compiler = ToolProvider.getSystemJavaCompiler();
  56         fileManager = compiler.getStandardFileManager(null, null, null);
  57         compilationUnits = new ArrayList<>();
  58         compilationUnits.add(new JavaSourceFromString("Apan", helloWorld));
  59     }
  60 
  61     @Benchmark
  62     public Boolean testCompile() throws Exception {
  63         JavaCompiler.CompilationTask task = compiler.getTask(null, fileManager, null, null, null, compilationUnits);
  64         return task.call();
  65     }
  66 
  67     private static class JavaSourceFromString extends SimpleJavaFileObject {
  68         final String code;
  69 
  70         JavaSourceFromString(String name, String code) {
  71             super(URI.create("string:///" + name.replace('.', '/') + Kind.SOURCE.extension),
  72                     Kind.SOURCE);
  73             this.code = code;
  74         }
  75 
  76         @Override
  77         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
  78             return code;
  79         }
  80     }
  81 }