how tomcat work

　筆記：

　　1.等待接受連接配接：java.net.Socket socket =  java.net.ServerSocket.accept()

　　2.處理連接配接：通過socket.getInputStream()把用戶端HTTP傳過來的資訊封裝成javax.servlet.http.HttpServletRequest對象

　　3.Tomcat4 的預設連接配接器httpConnector

隻負責擷取socket，給processor線程異步處理，馬上傳回以便下一個前來的 HTTP 請求可以被處理

// Hand this socket off to an appropriate processor
            HttpProcessor processor = createProcessor();
            if (processor == null) {
                try {
                    log(sm.getString("httpConnector.noProcessor"));
                    socket.close();
                } catch (IOException e) {
                    ;
                }
                continue;
            }
            //            if (debug >= 3)
            //                log("run: Assigning socket to processor " + processor);
            processor.assign(socket);      

這裡是 HttpProcessor 類的 assign 和 await 方法

　　

　　synchronized void assign(Socket socket) {

        // Wait for the Processor to get the previous Socket
        while (available) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }

        // Store the newly available Socket and notify our thread
        this.socket = socket;
        available = true;
        notifyAll();

        if ((debug >= 1) && (socket != null))
            log(" An incoming request is being assigned");

    }



      

/**
     * Await a newly assigned Socket from our Connector, or <code>null</code>
     * if we are supposed to shut down.
     */
    private synchronized Socket await() {

        // Wait for the Connector to provide a new Socket
        while (!available) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }

        // Notify the Connector that we have received this Socket
        Socket socket = this.socket;
        available = false;
        notifyAll();

        if ((debug >= 1) && (socket != null))
            log("  The incoming request has been awaited");

        return (socket);

    }      

轉載于:https://www.cnblogs.com/shapeOfMyHeart/p/5746482.html