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連接器的核心功能，本文去除非核心功能，留下整個程序的框架，便于理解。

1、接受連接請求

2.創(chuàng)建request,和response.

3.調(diào)用容器對應(yīng)的Invoke方法，

?首先看類的依賴結(jié)構(gòu)。

1.Connetor 構(gòu)造方法，根據(jù)具體的協(xié)議名字，創(chuàng)建協(xié)議處理器，主要有NIO,BIO，AJP,協(xié)議。如果要自定義協(xié)議處理劑最重要的協(xié)議處理器了。如圖，協(xié)議處理需要實現(xiàn)ProtocoHandler接口，

?構(gòu)造函數(shù) 輸入為協(xié)議名稱

public Connector(String protocol) {setProtocol(protocol);// Instantiate protocol handlerProtocolHandler p = null;try {Class<?> clazz = Class.forName(protocolHandlerClassName);
// 實例化一個協(xié)議處理器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);}}

2.createRequest 和相應(yīng) ?此處不仔細(xì)深入。很簡單。就是創(chuàng)建請求和相應(yīng)對象

public Request createRequest() {Request request = new Request();request.setConnector(this);return (request);}/*** Create (or allocate) and return a Response object suitable for* receiving the contents of a Response from the responsible Container.*/public Response createResponse() {Response response = new Response();response.setConnector(this);return (response);}

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3.啟動和關(guān)閉。是默認(rèn)方法；

protected void startInternal() throws LifecycleException {// Validate settings before startingif (getPort() < 0) {throw new LifecycleException(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 new LifecycleException(errPrefix + " " + sm.getString("coyoteConnector.protocolHandlerStartFailed"), e);}}

protected void stopInternal() throws LifecycleException {

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setState(LifecycleState.STOPPING);

try {
protocolHandler.stop();
} catch (Exception e) {
throw new LifecycleException
(sm.getString
("coyoteConnector.protocolHandlerStopFailed"), e);
}
}

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我們從代碼看到ProtocoHandler的重要性了明天再看

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轉(zhuǎn)載于:https://www.cnblogs.com/hansongjiang/p/4194300.html

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