Tomcat请求处理在源码中的轮转解析

public static void main(String args[]) {
 if (daemon == null) {
                // Don't set daemon until init() has completed
                Bootstrap bootstrap = new Bootstrap();
                try {
                    bootstrap.init();
                } catch (Throwable t) {
                    handleThrowable(t);
                    t.printStackTrace();
                    return;
                }
                daemon = bootstrap;
            } else {
                // When running as a service the call to stop will be on a new
                // thread so make sure the correct class loader is used to
                // prevent a range of class not found exceptions.
                Thread.currentThread().setContextClassLoader(daemon.catalinaLoader);
            }
......
}

public void stopServer() throws Exception {
        Method method =
            catalinaDaemon.getClass().getMethod("stopServer", (Class []) null);
        method.invoke(catalinaDaemon, (Object []) null);
    }

<Server port="8005" shutdown="SHUTDOWN">
    <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
    <Listener SSLEngine="on"
        className="org.apache.catalina.core.AprLifecycleListener" />
    <Listener className="org.apache.catalina.core.JasperListener" />
    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
    <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
    <GlobalNamingResources>
        <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>
    <Service name="Catalina">
        <Connector URIEncoding="UTF-8" connectionTimeout="20000"
            port="80" protocol="HTTP/1.1" redirectPort="8443" />
        <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
        <Engine defaultHost="localhost" name="Catalina">
            <Realm className="org.apache.catalina.realm.LockOutRealm">
                <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                    resourceName="UserDatabase" />
            </Realm>
            <Host appBase="webapps" autoDeploy="true" name="localhost"
                unpackWARs="true">
                <Valve className="org.apache.catalina.valves.AccessLogValve"
                    directory="logs" pattern="%h %l %u %t "%r" %s %b" prefix="localhost_access_log."
                    suffix=".txt" />
            </Host>
        </Engine>
    </Service>