tomcat server.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. --><!-- Note: A "Server" is not itself a "Container", so you may not define 
	subcomponents such as "Valves" at this level. Documentation at /docs/config/server.html -->
<Server port="8005" shutdown="SHUTDOWN">
	<Listener className="org.apache.catalina.startup.VersionLoggerListener" />
	<!-- Security listener. Documentation at /docs/config/listeners.html <Listener 
		className="org.apache.catalina.security.SecurityListener" /> -->
	<!--APR library loader. Documentation at /docs/apr.html -->
	<Listener SSLEngine="on"
		className="org.apache.catalina.core.AprLifecycleListener" />
	<!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
	<Listener className="org.apache.catalina.core.JasperListener" />
	<!-- Prevent memory leaks due to use of particular java/javax APIs -->
	<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
	<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
	<Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

	<!-- Global JNDI resources Documentation at /docs/jndi-resources-howto.html -->
	<GlobalNamingResources>
		<!-- Editable user database that can also be used by UserDatabaseRealm 
			to authenticate users -->
		<Resource auth="Container" description="User database that can be updated and saved"
			factory="org.apache.catalina.users.MemoryUserDatabaseFactory" name="UserDatabase"
			pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase" />
	</GlobalNamingResources>

	<!-- A "Service" is a collection of one or more "Connectors" that share 
		a single "Container" Note: A "Service" is not itself a "Container", so you 
		may not define subcomponents such as "Valves" at this level. Documentation 
		at /docs/config/service.html -->
	<Service name="Catalina">

		<!--The connectors can use a shared executor, you can define one or more 
			named thread pools -->
		<!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" 
			minSpareThreads="4"/> -->


		<!-- A "Connector" represents an endpoint by which requests are received 
			and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html 
			(blocking & non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) 
			Connector: /docs/apr.html Define a non-SSL HTTP/1.1 Connector on port 8080 -->
		<Connector port="8089" URIEncoding="UTF-8"
			connectionTimeout="20000" protocol="HTTP/1.1" redirectPort="8443" />
		<!-- A "Connector" using the shared thread pool -->
		<!-- <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" 
			connectionTimeout="20000" redirectPort="8443" /> -->
		<!-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the 
			BIO implementation that requires the JSSE style configuration. When using 
			the APR/native implementation, the OpenSSL style configuration is required 
			as described in the APR/native documentation -->
		<!-- <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol" 
			maxThreads="150" SSLEnabled="true" scheme="https" secure="true" clientAuth="false" 
			sslProtocol="TLS" /> -->

		<!-- Define an AJP 1.3 Connector on port 8009 -->
		<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />


		<!-- An Engine represents the entry point (within Catalina) that processes 
			every request. The Engine implementation for Tomcat stand alone analyzes 
			the HTTP headers included with the request, and passes them on to the appropriate 
			Host (virtual host). Documentation at /docs/config/engine.html -->

		<!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine 
			name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> -->
		<Engine defaultHost="localhost" name="Catalina">

			<!--For clustering, please take a look at documentation at: /docs/cluster-howto.html 
				(simple how to) /docs/config/cluster.html (reference documentation) -->
			<!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> -->

			<!-- Use the LockOutRealm to prevent attempts to guess user passwords 
				via a brute-force attack -->
			<Realm className="org.apache.catalina.realm.LockOutRealm">
				<!-- This Realm uses the UserDatabase configured in the global JNDI resources 
					under the key "UserDatabase". Any edits that are performed against this UserDatabase 
					are immediately available for use by the Realm. -->
				<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
					resourceName="UserDatabase" />
			</Realm>

			<Host appBase="webapps" autoDeploy="true" name="localhost"
				unpackWARs="true">

				<!-- SingleSignOn valve, share authentication between web applications 
					Documentation at: /docs/config/valve.html -->
				<!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn" 
					/> -->

				<!-- Access log processes all example. Documentation at: /docs/config/valve.html 
					Note: The pattern used is equivalent to using pattern="common" -->
				<Valve className="org.apache.catalina.valves.AccessLogValve"
					directory="logs" pattern="%h %l %u %t "%r" %s %b" prefix="localhost_access_log."
					suffix=".txt" />

				<Context docBase="D:\apache-tomcat-7.0.63\webapps\PrjJavaQuestion"
					path="/PrjJavaQuestion" reloadable="true"
					source="org.eclipse.jst.jee.server:PrjJavaQuestion" />
			</Host>
		</Engine>
	</Service>
</Server>

1）使用AprEndpoint$Acceptor#run()来接收TCP连接

2）使用AprEndpoint$Worker#run()来做启动TCP连接处理流程

3）根据Socket解析HTTP Header封装成Request

4）根据消息头解析出Container相关信息

5）调用adapter#service()，请求转给Container（Engine）

6）在Engine》Host》Context之间通过Pipeline传递请求

6.1）StandarEngineValue#invoke()从将Request转给Host处理
6.2）StandardHostValue#invoke()将Request转给Context处理
7）启动监听器处理，接着在Context找到Wrapper，让Wrapper处理

8）Servlet处理请求

8.1）分配Servlet
要让Servlet处理请求，得先分配Servlet，分配Servlet对象也是有讲究的，因为Servlet有两种运行模式，单线程运行模式和多线程运行模式。
8.2）过滤器链处理
Filter
8.3）Servlet.service() ，Servlet执行
过滤器对象里有个属性就是servelt，在过滤器链处理完毕，就直接调用了Servlet了。