public class HttpServletWrapper
extends javax.servlet.http.HttpServlet
Constructor and Description |
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HttpServletWrapper()
Public default constructor; required by spec.
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Modifier and Type | Method and Description |
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void |
destroy()
Called by the servlet container to indicate to a servlet that the servlet is being taken out of service.
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protected String |
getDescription()
Returns a string representation of this object's attributes.
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protected javax.servlet.http.HttpServlet |
getServlet()
Get the wrapped Servlet.
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String |
getServletInfo()
Returns information about the servlet, such as author, version, and copyright.
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protected SessionHelper |
getSessionHelper()
Get the SessionHelper.
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void |
init(javax.servlet.ServletConfig cfg)
Called by the servlet container to indicate to a servlet that the servlet is being placed into service.
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void |
service(javax.servlet.ServletRequest req, javax.servlet.ServletResponse res)
Called by the servlet container to allow the servlet to respond to a request.
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String |
toString()
Returns a string representation of the object.
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doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service
public HttpServletWrapper()
public void init(javax.servlet.ServletConfig cfg) throws javax.servlet.ServletException
The servlet container calls the init
method exactly once after instantiating the servlet. The init
method must complete successfully before the servlet can receive any requests.
The servlet container cannot place the servlet into service if the init
method
ServletException
init
in interface javax.servlet.Servlet
init
in class javax.servlet.GenericServlet
cfg
- a ServletConfig
object containing the servlet's configuration and initialization parametersjavax.servlet.ServletException
- if an exception has occurred that interferes with the servlet's normal operationpublic void service(javax.servlet.ServletRequest req, javax.servlet.ServletResponse res) throws javax.servlet.ServletException, IOException
This method is only called after the servlet's init()
method has completed successfully.
Servlets typically run inside multithreaded servlet containers that can handle multiple requests concurrently. Developers must be aware to synchronize access to any shared resources such as files, network connections, and as well as the servlet's class and instance variables. More information on multithreaded programming in Java is available in the Java tutorial on multi-threaded programming.
service
in interface javax.servlet.Servlet
service
in class javax.servlet.http.HttpServlet
req
- the ServletRequest
object that contains the client's requestres
- the ServletResponse
object that contains the servlet's responsejavax.servlet.ServletException
- if an exception occurs that interferes with the servlet's normal operationIOException
- if an input or output exception occurspublic String getServletInfo()
The string that this method returns should be plain text and not markup of any kind (such as HTML, XML, etc.).
getServletInfo
in interface javax.servlet.Servlet
getServletInfo
in class javax.servlet.GenericServlet
String
containing servlet informationpublic void destroy()
service
method have exited or after a timeout period has passed. After the servlet container calls this method, it will not call the service
method again on this servlet.
This method gives the servlet an opportunity to clean up any resources that are being held (for example, memory, file handles, threads) and make sure that any persistent state is synchronized with the servlet's current state in memory.
destroy
in interface javax.servlet.Servlet
destroy
in class javax.servlet.GenericServlet
public String toString()
protected String getDescription()
protected javax.servlet.http.HttpServlet getServlet()
protected SessionHelper getSessionHelper()