tomcat之server.xml介绍

tomcat组件之间的关系图



组件的内容详细介绍：

<!-- 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"> <!-- port 端口 监听关闭tomcat的请求

shutdown 向端口发送的命令字符串

-->

<!--APR library loader. Documentation at /docs/apr.html -->

<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />

<!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->

<Listener className="org.apache.catalina.core.JasperListener" />

<!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html -->

<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />

<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

<!-- 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 name="UserDatabase" auth="Container"

type="org.apache.catalina.UserDatabase"

description="User database that can be updated and saved"

factory="org.apache.catalina.users.MemoryUserDatabaseFactory"

pathname="conf/tomcat-users.xml" />

</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"> <!-- 处理所有直接由tomcat服务器接收的web请求-->

<!--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="8080" protocol="HTTP/1.1"

connectionTimeout="20000"

redirectPort="8443" URIEncoding="UTF-8" /> <!-- connector 客户端和Service之间的连接

port 服务器端要创建的端口号，并监听客户端的请求

-->

<!-- 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 JSSE configuration, when using APR, the

connector should be using the OpenSSL style configuration

described in the APR documentation -->

<!--

<Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"

maxThreads="150" 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" />

<!-- 通过8009接收由其他服务器转发来的请求-->

<!-- 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="Standalone" defaultHost="localhost" jvmRoute="jvm1">

-->

<Engine name="Catalina" defaultHost="localhost">

<!-- service中的请求处理机，接收和处理来自connector的请求（每个Service元素只能有一个engine元素）

deaultHost 缺省的处理请求的主机名

包含logger、realm、valve、host

-->

<!--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"/>

-->

<!-- The request dumper valve dumps useful debugging information about

the request and response data received and sent by Tomcat.

Documentation at: /docs/config/valve.html -->

<!--

<Valve className="org.apache.catalina.valves.RequestDumperValve"/>

-->

<!-- 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"/> <!-- 存放用户名、密码已经role的数据库-->

<!-- Define the default virtual host

Note: XML Schema validation will not work with Xerces 2.2.

-->

<Host name="localhost" appBase="webapps"

unpackWARs="true" autoDeploy="true"

xmlValidation="false" xmlNamespaceAware="false">

<!-- 虚拟主机

name 主机名

appBase 存放项目的目录

unpackWARs true tomcat自动解压war文件

autoDeploy true tomcat处于运行状态时，如果有新的web应用加进来，会自动发布这个web

-->

<!-- 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 -->

<!--

<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"

prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>

-->

</Host>

</Engine>

</Service>

</Server>