tomcat 学习记录
- tomcat 编译
- ant 下载
- 编译
- 运行
- 源码Debug
- 运行 Bootstrap
- 运行Tomcat
- 查看状态
- pom.xml
- 测试
- EmbeddedTomcat
- 参考
- 书籍
- 博客
tomcat 编译
下载 tomcat 10 源码，解压然后idea导入
包存放的默认位置如下：base.path=${user.home}/tomcat-build-libs
同时在项目的 tomcat/res/ide-support/idea/tomcat.iml 文件中提供了jar的依赖配置方式, 可以覆盖 .idea 配置，但对于 社区版有些插件是无法安装的，就从 ${user.home}/tomcat-build-libs 手动导入 jar 包
参考
- Tomcat 源码阅读与调试环境搭建 - 基于Idea和Tomcat 8.5
ant 下载
ant 二进制包下载 后添加环境变量 %ANT_HOME%\bin，idea2023 会自动识别， 或者打开 help-> action 搜索 ant
编译
- 根路径下
build.properties.default，将其复制为build.properties - 打开
ant侧边栏，点击“+”，选择tomcat下的build.xml文件 - 由于 windows默认编码集为GBK，由于使用startup.bat启动tomcat时，它会读取catalina.bat的代码并打开一个新窗口运行。打开的cmd默认编码可能不是utf-8，与系统编码不一致，所以导致乱码
- 通过修改注册表
- 修改 conf/logging.properties 日志编码为GBK
- 在项目结构设置里，添加 JDK，同时设置 java 目录为源代码目录
点击 ant 窗口的运行按钮
运行
在输出目录下的 build/bin 运行 startup.bat
在浏览器 http://localhost:8080/
源码Debug
导入 ant 依赖
导入 ${user.home}/tomcat-build-libs 下的依赖
针对 java lang ClassNotFoundException listeners ContextListener 错误，是由于在idea的maven项目中要将java文件编译，加载进内存需要将文件夹设置为Sources Root
运行 Bootstrap
在 java/org/apache/catalina/startup/Bootstrap.java 中，自己调试运行
运行Tomcat
代码路径 java/org/apache/catalina/startup/Tomcat.java
public static void main(String[] args) throws Exception {
// Process some command line parameters
String[] catalinaArguments = null;
for (int i = 0; i < args.length; i++) {
if (args[i].equals("--no-jmx")) {
Registry.disableRegistry();
} else if (args[i].equals("--catalina")) {
// This was already processed before
// Skip the rest of the arguments as they are for Catalina
ArrayList<String> result = new ArrayList<>();
for (int j = i + 1; j < args.length; j++) {
result.add(args[j]);
}
catalinaArguments = result.toArray(new String[0]);
break;
}
}
SecurityClassLoad.securityClassLoad(Thread.currentThread().getContextClassLoader());
Tomcat tomcat = new Tomcat();
// Create a Catalina instance and let it parse the configuration files
// It will also set a shutdown hook to stop the Server when needed
// Use the default configuration source
tomcat.init(null, catalinaArguments);
boolean await = false;
String path = "";
// Process command line parameters
for (int i = 0; i < args.length; i++) {
if (args[i].equals("--war")) {
if (++i >= args.length) {
throw new IllegalArgumentException(sm.getString("tomcat.invalidCommandLine", args[i - 1]));
}
File war = new File(args[i]);
tomcat.addWebapp(path, war.getAbsolutePath());
} else if (args[i].equals("--path")) {
if (++i >= args.length) {
throw new IllegalArgumentException(sm.getString("tomcat.invalidCommandLine", args[i - 1]));
}
path = args[i];
} else if (args[i].equals("--await")) {
await = true;
} else if (args[i].equals("--no-jmx")) {
// This was already processed before
} else if (args[i].equals("--catalina")) {
// This was already processed before
// Skip the rest of the arguments as they are for Catalina
break;
} else {
throw new IllegalArgumentException(sm.getString("tomcat.invalidCommandLine", args[i]));
}
}
tomcat.start();
// Ideally the utility threads are non daemon
if (await) {
tomcat.getServer().await();
}
}
查看状态
在 conf/tomcat-users.xml 添加用户
<user username="admin" password="admin" roles="manager-gui,admin-gui,tomcat"/>
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<!--
~ 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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.apache.tomcat</groupId>
<artifactId>apache-tomcat-10.1.16-src</artifactId>
<name>Tomcat</name>
<version>10.1.16</version>
<build>
<!--指定源目录-->
<finalName>apache-tomcat-10.1.16-src</finalName>
<sourceDirectory>java</sourceDirectory>
<resources>
<resource>
<directory>java</directory>
</resource>
</resources>
<plugins>
<!--引入编译插件-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<encoding>UTF-8</encoding>
<source>11</source>
<target>11</target>
</configuration>
</plugin>
</plugins>
</build>
<!--tomcat 依赖的基础包-->
<dependencies>
<dependency>
<groupId>geronimo-spec</groupId>
<artifactId>geronimo-spec-jaxrpc</artifactId>
<version>1.1-rc4</version>
</dependency>
<dependency>
<groupId>wsdl4j</groupId>
<artifactId>wsdl4j</artifactId>
<version>1.6.3</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest</artifactId>
<version>2.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>4.3</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>org.objenesis</groupId>
<artifactId>objenesis</artifactId>
<version>3.3</version>
</dependency>
<dependency>
<groupId>com.unboundid</groupId>
<artifactId>unboundid-ldapsdk</artifactId>
<version>6.0.10</version>
</dependency>
<dependency>
<groupId>com.puppycrawl.tools</groupId>
<artifactId>checkstyle</artifactId>
<version>10.12.4</version>
</dependency>
<dependency>
<groupId>org.jacoco</groupId>
<artifactId>org.jacoco.agent</artifactId>
<version>0.8.11</version>
</dependency>
<dependency>
<groupId>com.github.spotbugs</groupId>
<artifactId>spotbugs</artifactId>
<version>4.8.0</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>biz.aQute.bnd</groupId>
<artifactId>biz.aQute.bndlib</artifactId>
<version>7.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>jakartaee-migration</artifactId>
<version>1.0.7</version>
</dependency>
<dependency>
<groupId>net.jsign</groupId>
<artifactId>jsign-core</artifactId>
<version>5.0</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.16.1.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>ant</groupId>
<artifactId>ant</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>org.eclipse.jdt</groupId>
<artifactId>ecj</artifactId>
<version>3.36.0</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-juli</artifactId>
<version>11.0.0-M14</version>
</dependency>
</dependencies>
</project>
测试
EmbeddedTomcat
public class EmbeddedTomcat {
private static void resetLogging() {
final String loggingConfig = "handlers = java.util.logging.ConsoleHandler\n" +
".handlers = java.util.logging.ConsoleHandler\n" +
"java.util.logging.ConsoleHandler.level = FINE\n" +
"java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter\n" +
"java.util.logging.ConsoleHandler.encoding = UTF-8\n";
try {
InputStream is = new ByteArrayInputStream(loggingConfig.getBytes(StandardCharsets.UTF_8));
LogManager.getLogManager().readConfiguration(is);
LogFactory.getLog(EmbeddedTomcat.class).info("Logger configured to System.out");
} catch (SecurityException | IOException e) {
// Ignore, the VM default will be used
}
}
public static void main(String... args) throws Exception {
Registry.disableRegistry();
Tomcat tomcat = new Tomcat();
resetLogging();
tomcat.setPort(8080);
Connector connector = tomcat.getConnector();
connector.setProperty("bindOnInit", "false");
// No file system docBase required
Context ctx = tomcat.addContext("", null);
skipTldsForResourceJars(ctx);
CounterServlet counterServlet = new CounterServlet();
Tomcat.addServlet(ctx, "counterServlet", counterServlet);
ctx.addServletMappingDecoded("/", "counterServlet");
//ctx.addApplicationListener(new WsContextListener());
tomcat.start();
Thread.sleep(60*1000);
}
public static void skipTldsForResourceJars(Context context) {
StandardJarScanner scanner = (StandardJarScanner) context.getJarScanner();
StandardJarScanFilter filter = (StandardJarScanFilter) scanner.getJarScanFilter();
filter.setTldSkip(filter.getTldSkip() + ",resources*.jar");
}
private static class CounterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private AtomicInteger callCount = new AtomicInteger(0);
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.getSession(true);
resp.setContentType("text/plain");
resp.getWriter().print("OK: " + req.getRequestURL() + "[" + callCount.incrementAndGet()+ "]");
}
}
}
参考
- Apache Tomcat
书籍
- 深入剖析 Tomcat
- Tomcat 架构解析
博客
- Tomcat源码详解知识体系详解
- tomcat源码分析
- Tomcat 分析
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