1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* 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.catalina.startup;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLClassLoader;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.apache.catalina.Context;
import org.apache.catalina.loader.WebappClassLoader;
import org.apache.tomcat.util.buf.ByteChunk;
public class TestTomcatClassLoader extends TomcatBaseTest {
@Test
public void testDefaultClassLoader() throws Exception {
Tomcat tomcat = getTomcatInstance();
// Must have a real docBase - just use temp
Context ctx =
tomcat.addContext("", System.getProperty("java.io.tmpdir"));
Tomcat.addServlet(ctx, "ClassLoaderReport", new ClassLoaderReport(null));
ctx.addServletMapping("/", "ClassLoaderReport");
tomcat.start();
ByteChunk res = getUrl("http://localhost:" + getPort() + "/");
assertEquals("WEBAPP,SYSTEM,OTHER,", res.toString());
}
@Test
public void testNonDefaultClassLoader() throws Exception {
ClassLoader cl = new URLClassLoader(new URL[0],
Thread.currentThread().getContextClassLoader());
Thread.currentThread().setContextClassLoader(cl);
Tomcat tomcat = getTomcatInstance();
tomcat.getServer().setParentClassLoader(cl);
// Must have a real docBase - just use temp
Context ctx =
tomcat.addContext("", System.getProperty("java.io.tmpdir"));
Tomcat.addServlet(ctx, "ClassLoaderReport", new ClassLoaderReport(cl));
ctx.addServletMapping("/", "ClassLoaderReport");
tomcat.start();
ByteChunk res = getUrl("http://localhost:" + getPort() + "/");
assertEquals("WEBAPP,CUSTOM,SYSTEM,OTHER,", res.toString());
}
private static final class ClassLoaderReport extends HttpServlet {
private static final long serialVersionUID = 1L;
private transient ClassLoader custom;
public ClassLoaderReport(ClassLoader custom) {
this.custom = custom;
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/plain");
PrintWriter out = resp.getWriter();
ClassLoader system = ClassLoader.getSystemClassLoader();
ClassLoader cl = Thread.currentThread().getContextClassLoader();
while (cl != null) {
if (system == cl) {
out.print("SYSTEM,");
} else if (custom == cl) {
out.print("CUSTOM,");
} else if (cl instanceof WebappClassLoader) {
out.print("WEBAPP,");
} else {
out.print("OTHER,");
}
cl = cl.getParent();
}
}
}
}
|
