org.eclipse.jetty.servlets

Class DataRateLimitedServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.eclipse.jetty.servlets.DataRateLimitedServlet

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

public class DataRateLimitedServlet
extends HttpServlet

A servlet that uses the Servlet 3.1 asynchronous IO API to server static content at a limited data rate.

Two implementations are supported:

• The StandardDataStream impl uses only standard APIs, but produces more garbage due to the byte[] nature of the API.
• the JettyDataStream impl uses a Jetty API to write a ByteBuffer and thus allow the efficient use of file mapped buffers without any temporary buffer copies (I did tell the JSR that this was a good idea to have in the standard!).

The data rate is controlled by setting init parameters:

buffersize

The amount of data in bytes written per write

pause

The period in ms to wait after a write before attempting another

pool

The size of the thread pool used to service the writes (defaults to available processors)

Thus if buffersize = 1024 and pause = 100, the data rate will be limited to 10KB per second.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DataRateLimitedServlet()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy()
protected void	doGet(HttpServletRequest request, HttpServletResponse response)
void	init()

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataRateLimitedServlet

public DataRateLimitedServlet()

Method Detail

init

public void init()
          throws ServletException

Overrides:

init in class GenericServlet

Throws:

ServletException

destroy

public void destroy()

Specified by:

destroy in interface Servlet

Overrides:

destroy in class GenericServlet

doGet

protected void doGet(HttpServletRequest request,
         HttpServletResponse response)
              throws ServletException,
                     IOException

Overrides:

doGet in class HttpServlet

Throws:

ServletException

IOException