Interface javax.servlet.SingleThreadModel
ANSWER: ANSWER: A 21. ServerSocket int erverSocket int port, int maxQueue.
The recommended way to affect the execution of the EL is to provide an element at the right place in the application configuration resources which will be considered in the normal course of expression evaluation. A Dialog can have a MenuBar.
Interface javax.servlet.SingleThreadModel - The getContentType , getContentLength , and getCharacterEncoding methods can help retrieve this information.
It contains the classes necessary for a standard, protocol-independent servlet. Every servlet must implement the Servlet interface in one form or another. The abstract GenericServlet class provides the framework for developing basic servlets. The package also includes a variety of utility classes that communicate with the server and the client. If you are creating a protocol-independent servlet, you probably want to subclass this class rather than implement the Servlet interface directly. Note that the service method is declared as abstract; this is the only method you have to override to implement a generic servlet. GenericServlet includes basic implementations of the init and destroy methods, which perform basic setup and cleanup tasks, respectively. The init method that takes a ServletConfig object stores that object for later use. This means that if you override the method and fail to call the super. HttpServlet RequestDispatcher Servlets 2. A RequestDispatcher object is retrieved by calling the getRequestDispatcher method on the ServletContext object. The forward method passes a request on to another servlet for processing, while the include method includes the output of another servlet in the output of the current servlet. All servlets implement this interface, either directly or by subclassing a class that does. The interface declares the basic servlet functionality: initializing a servlet, handling client requests, and destroying a servlet. Since init creates resources the servlet can reuse, it is guaranteed to finish executing before the servlet handles any client requests. The server calls the service method for each client request. The servlet interacts with the client via ServletRequest and ServletResponse objects passed to service. The getServletInfo method should return a String that describes a servlet, and the getServletConfig method should return the ServletConfig object that was passed to the init method. UnavailableException Returned By: ServletContext. ServletConfig supports initialization parameters also known simply as init parameters defined by the server administrator for a particular servlet. These parameters are accessed via the getInitParameter and getInitParameterNames methods. ServletConfig also includes a ServletContext object, accessible via getServletContext , for direct interaction with the server. Enumeration getInitParameterNames ; public abstract ServletContext getServletContext ; } Implementations: GenericServlet Passed To: GenericServlet. This includes reading server-specific attributes, finding information about particular files located on the server, and writing to the server log files. If there are several virtual servers running, each one may return a different ServletContext. Servlets can also use ServletContext to interact with other servlets loaded on the same server. Enumeration getAttributeNames ; 2. URL getResource String path throws java. InputStream getResourceAsStream String path ; public abstract String getServerInfo ; public abstract void log String msg ; 2. Enumeration getServletNames ; public abstract java. Enumeration getServlets ; 2. The root cause can be retrieved with the getRootCause method. init , service , RequestDispatcher. forward , include , Servlet. init , service , ServletContext. doDelete , doGet , doOptions , doPost , doPut , doTrace , service ServletInputStream Servlets 1. A servlet can get a ServletInputStream by calling the getInputStream method of ServletRequest. While ServletInputStream does contain a readLine method for reading textual data one line at a time, this functionality was taken over by BufferedReader objects and the getReader method of ServletRequest in Version 2. Thus, ServletInputStream should be used only to read binary data, generally in the context of a filtering servlet. A servlet can get a ServletOutputStream by calling the getOutputStream method of ServletResponse. ServletOutputStream was the only available output method in Version 1. For text and HTML output, it has been supplanted by PrintWriter objects produced by the getWriter method of ServletResponse. The various print and println methods should therefore be regarded as legacies. The server passes a ServletRequest object to the service method of a servlet. ServletRequest provides access to request parameters, such as form values or other request-specific parameters. These are accessed using the getParameterNames , getParameter , and getParameterValues methods. Raw request data can be read by the getReader method for textual data and the getInputStream method for binary data. The getContentType , getContentLength , and getCharacterEncoding methods can help retrieve this information. Other methods provide information about the client getRemoteAddr , getRemoteHost , the request itself getScheme , getProtocol , and the server getServerName , getServerPort. Enumeration getAttributeNames ; 2. HttpServletRequest Passed To: GenericServlet. forward , include , Servlet. The interface defines a getOutputStream method that returns a ServletOutputStream for sending binary data and a getWriter method that returns a PrintWriter for sending textual data. The setContentType and setContentLength methods can explicitly set the content type and content length often necessary for keep-alive connections and other tasks. If you call setContentType , you should do so before you call getWriter , as getWriter consults the content type to determine which charset to use. HttpServletResponse Passed To: GenericServlet. forward , include , Servlet. In this case, the server ensures that each instance of the servlet handles only one service request at a time. SingleThreadModel provides easy thread safety, but imposes performance penalties. To specify temporary unavailability, use the three-argument constructor and specify the duration of the servlet's downtime. If a servlet specifies temporary unavailability, the server may but is not required to attempt to reload the servlet after the specified interval.
Given the following classes defined in separate files, what will be the effect of compiling and running this class Test. How would you set the color of a graphics context called g to cyan. Which of the following statements is glad for a method which is overriding the following method: public void add int a {. If not, one is created, and their account number is assigned to it. ServletConfig is passed as the parameter to init method javax.servlet.singlethreadmodel interface stores all the values configured in the web. After we have a shopping cart, the user will begin adding items to the cart. The abstract GenericServlet class provides the framework for developing basic servlets. Which driver is efficient and always preferable for using JDBC applications. ANSWER: ANSWER: A 21.