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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.創建request,和response.

3.調用容器對應的Invoke方法，

?首先看類的依賴結構。

1.Connetor 構造方法，根據具體的協議名字，創建協議處理器，主要有NIO,BIO，AJP,協議。如果要自定義協議處理劑最重要的協議處理器了。如圖，協議處理需要實現ProtocoHandler接口，

?構造函數 輸入為協議名稱

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 ?此處不仔細深入。很簡單。就是創建請求和相應對象

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.啟動和關閉。是默認方法；

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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轉載于:https://www.cnblogs.com/hansongjiang/p/4194300.html

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