Tomcat 7 Connector Intensive (1)

This class diagram is the method and property of the most important class that I intercept.

Where Protocalhandler is the protocol processor, Tomcat supports the protocols that are seen in the following ways. Different protocols implement different Protocalhandler classes.

 Public voidSetprotocol (String protocol) {if(Aprlifecyclelistener.isapravailable ()) {if("http/1.1". Equals (protocol)) {Setprotocolhandlerclassname ("Org.apache.coyote.http11.Http11AprProtocol"); } Else if("ajp/1.3". Equals (protocol)) {Setprotocolhandlerclassname ("Org.apache.coyote.ajp.AjpAprProtocol"); } Else if(Protocol! =NULL) {setprotocolhandlerclassname (protocol); } Else{setprotocolhandlerclassname ("Org.apache.coyote.http11.Http11AprProtocol"); }        } Else {            if("http/1.1". Equals (protocol)) {Setprotocolhandlerclassname ("Org.apache.coyote.http11.Http11NioProtocol"); } Else if("ajp/1.3". Equals (protocol)) {Setprotocolhandlerclassname ("Org.apache.coyote.ajp.AjpNioProtocol"); } Else if(Protocol! =NULL) {setprotocolhandlerclassname (protocol); }        }    }

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Protocalhandler is the core of the entire connector class.

When initializing the connector, the processor object is created according to the protocol name.

  PublicConnector (String protocol) {Setprotocol (protocol); //Instantiate protocol HandlerProtocolhandler p =NULL; Try{Class<?> Clazz =Class.forName (protocolhandlerclassname); P=(Protocolhandler) clazz.newinstance (); } Catch(Exception e) {log.error (sm.getstring ("Coyoteconnector.protocolhandlerinstantiationfailed"), E); } finally {             This. Protocolhandler =p; }        if(!globals.strict_servlet_compliance) {uriencoding= "UTF-8"; Uriencodinglower=uriencoding.tolowercase (locale.english); }    }

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The first is to initialize the Protocol processor (remove the less important code)

protected void throws lifecycleexception {        super. initinternal ();         // Initialize Adapter        New Coyoteadapter (this);        Protocolhandler.setadapter (adapter);
Each protocol processor has a corresponding adapter, what does the adapter do?                 protocolhandler.init ();            }

Connector boot, actually start the corresponding protocol processor,

 protected voidStartinternal ()throwslifecycleexception {//Validate settings before starting        if(Getport () < 0) {            Throw Newlifecycleexception (sm.getstring ("Coyoteconnector.invalidport", Integer.valueof (Getport ()));        } setState (lifecyclestate.starting); Try{Protocolhandler.start (); } Catch(Exception e) {String Errprefix= ""; if( This. Service! =NULL) {Errprefix+ = "service.getname (): \" "+ This. Service.getname () + "\"; "; }            Throw Newlifecycleexception (Errprefix+ " " +sm.getstring ("Coyoteconnector.protocolhandlerstartfailed"), E); }    }

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Termination is actually terminating the Protocol processor

 protected voidStartinternal ()throwslifecycleexception {//Validate settings before starting        if(Getport () < 0) {            Throw Newlifecycleexception (sm.getstring ("Coyoteconnector.invalidport", Integer.valueof (Getport ()));        } setState (lifecyclestate.starting); Try{Protocolhandler.start (); } Catch(Exception e) {String Errprefix= ""; if( This. Service! =NULL) {Errprefix+ = "service.getname (): \" "+ This. Service.getname () + "\"; "; }            Throw Newlifecycleexception (Errprefix+ " " +sm.getstring ("Coyoteconnector.protocolhandlerstartfailed"), E); }    }

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You see here, actually see the connector class need to do the following work

(1) Create a Request object

/**       * Create (or allocate) and return a request object suitable for     * Specifying the contents of a request to the Responsible Container.      */     Public Request createrequest () {        new  request ();        Request.setconnector (this);         return (request);    }

(2) Create a Response object

  /**      * Create (or allocate) and return a Response object suitable for     * receiving the contents of a Response from The responsible Container.      */     Public Response Createresponse () {        new  Response ();        Response.setconnector (this);         return (response);    }

(3) to the two objects to the container, simply speaking, after creating the good object, passed to the adapter class is OK. Coyoteadapter class

Tomcat 7 Connector Intensive (1)