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 * jdk.jdeps/com.sun.tools.javap
33 * @build Wrapper toolbox.ToolBox
34 * @run main Wrapper ClasspathDependencies
35 */
36
37 import static com.sun.tools.javac.util.Assert.check;
38
39 import java.io.IOException;
40 import java.nio.file.FileVisitResult;
41 import java.nio.file.Files;
42 import java.nio.file.Path;
43 import java.nio.file.Paths;
44 import java.nio.file.SimpleFileVisitor;
45 import java.nio.file.attribute.BasicFileAttributes;
46 import java.nio.file.attribute.FileTime;
47
48 public 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 }