ClasspathDependencies.java revision 3573:c4a18ee691c4 
1/*
2 * Copyright (c) 2015, 2016, 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
24/*
25 * @test
26 * @bug 8054717
27 * @summary Make sure changes of public API on classpath triggers recompilation
28 * @library /tools/lib
29 * @modules jdk.compiler/com.sun.tools.javac.api
30 *          jdk.compiler/com.sun.tools.javac.main
31 *          jdk.compiler/com.sun.tools.sjavac
32 * @build Wrapper toolbox.ToolBox toolbox.Assert
33 * @run main Wrapper ClasspathDependencies
34 */
35
36
37import java.io.IOException;
38import java.nio.file.FileVisitResult;
39import java.nio.file.Files;
40import java.nio.file.Path;
41import java.nio.file.Paths;
42import java.nio.file.SimpleFileVisitor;
43import java.nio.file.attribute.BasicFileAttributes;
44import java.nio.file.attribute.FileTime;
45
46import static toolbox.Assert.check;
47
48public class ClasspathDependencies extends SjavacBase {
49
50    public static void main(String... args) throws Exception {
51
52        Path root = Paths.get(ClasspathDependencies.class.getSimpleName() + "Test");
53
54        delete(root);
55
56        Path src = root.resolve("src");
57        Path classes = root.resolve("classes");
58        Path srcDep = root.resolve("srcDep");
59        Path classesDep = root.resolve("classesDep");
60
61        ////////////////////////////////////////////////////////////////////////
62        headline("Create a test dependency, Dep.class, and put it in the classpath dir");
63        String depCode = "package dep; public class Dep { public void m1() {} }";
64        toolbox.writeFile(srcDep.resolve("dep/Dep.java"), depCode);
65        int rc = compile("-d", classesDep, "--state-dir=" + classesDep, srcDep);
66        check(rc == 0, "Compilation failed unexpectedly");
67
68        ////////////////////////////////////////////////////////////////////////
69        headline("Compile and link against the Dep.class");
70        toolbox.writeFile(src.resolve("pkg/C.java"),
71                          "package pkg;" +
72                          "import dep.Dep;" +
73                          "public class C { Dep dep; public void m() { new Dep().m1(); } }");
74        rc = compile("-d", classes, "--state-dir=" + classes, src, "-cp", classesDep);
75        check(rc == 0, "Compilation failed unexpectedly");
76        FileTime modTime1 = Files.getLastModifiedTime(classes.resolve("pkg/C.class"));
77
78        ////////////////////////////////////////////////////////////////////////
79        headline("Update dependency (without changing the public api)");
80        Thread.sleep(2000);
81        depCode = depCode.replaceAll("}$", "private void m2() {} }");
82        toolbox.writeFile(srcDep.resolve("dep/Dep.java"), depCode);
83        rc = compile("-d", classesDep, "--state-dir=" + classesDep, srcDep);
84        check(rc == 0, "Compilation failed unexpectedly");
85
86        ////////////////////////////////////////////////////////////////////////
87        headline("Make sure that this does not trigger recompilation of C.java");
88        rc = compile("-d", classes, "--state-dir=" + classes, src, "-cp", classesDep);
89        check(rc == 0, "Compilation failed unexpectedly");
90        FileTime modTime2 = Files.getLastModifiedTime(classes.resolve("pkg/C.class"));
91        check(modTime1.equals(modTime2), "Recompilation erroneously triggered");
92
93        ////////////////////////////////////////////////////////////////////////
94        headline("Update public API of dependency");
95        Thread.sleep(2000);
96        depCode = depCode.replace("m1()", "m1(String... arg)");
97        toolbox.writeFile(srcDep.resolve("dep/Dep.java"), depCode);
98        rc = compile("-d", classesDep, "--state-dir=" + classesDep, srcDep);
99        check(rc == 0, "Compilation failed unexpectedly");
100
101        ////////////////////////////////////////////////////////////////////////
102        headline("Make sure that recompilation of C.java is triggered");
103        rc = compile("-d", classes, "--state-dir=" + classes, src, "-cp", classesDep);
104        check(rc == 0, "Compilation failed unexpectedly");
105        FileTime modTime3 = Files.getLastModifiedTime(classes.resolve("pkg/C.class"));
106        check(modTime2.compareTo(modTime3) < 0, "Recompilation not triggered");
107    }
108
109    static void headline(String str) {
110        System.out.println();
111        System.out.println(str);
112        System.out.println(str.replaceAll(".", "-"));
113    }
114
115    static void delete(Path root) throws IOException {
116        if (!Files.exists(root))
117            return;
118        Files.walkFileTree(root, new SimpleFileVisitor<Path>() {
119                 @Override
120                 public FileVisitResult visitFile(Path f, BasicFileAttributes a)
121                         throws IOException {
122                     Files.delete(f);
123                     return FileVisitResult.CONTINUE;
124                 }
125
126                 @Override
127                 public FileVisitResult postVisitDirectory(Path dir, IOException e)
128                         throws IOException {
129                     if (e != null)
130                         throw e;
131                     if (!dir.equals(root))
132                         Files.delete(dir);
133                     return FileVisitResult.CONTINUE;
134                 }
135            });
136    }
137}
138