com.qindesign.servlet.example
Class SimpleOneWireServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.qindesign.servlet.example.SimpleOneWireServlet

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

public class SimpleOneWireServlet
extends HttpServlet

Simple servlet that reads from a 1-Wire sensor. This assumes the adapter and device address are known.

Version:

1.0.4

Author:

Shawn Silverman

See Also:

Serialized Form

Constructor Summary

SimpleOneWireServlet()

Method Summary

protected void	doGet(HttpServletRequest req, HttpServletResponse resp) Process a GET request.
protected Object	getValue(DSPortAdapter a, OneWireContainer c, HttpServletRequest req, HttpServletResponse resp) Retrieves a value from the given container.
protected void	printMessage(HttpServletResponse resp, Object msg) Prints the output message.

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleOneWireServlet

public SimpleOneWireServlet()

Method Detail

doGet

protected void doGet(HttpServletRequest req,
                     HttpServletResponse resp)
              throws ServletException,
                     IOException

Process a GET request.

Overrides:

doGet in class HttpServlet

Throws:

ServletException

IOException

printMessage

protected void printMessage(HttpServletResponse resp,
                            Object msg)
                     throws IOException

Prints the output message. The message could be a string, number, or any other object. The content type and other necessary headers in the response should be set.

Parameters:

resp - the HTTP response object

msg - an object containing the message

Throws:

IOException

getValue

protected Object getValue(DSPortAdapter a,
                          OneWireContainer c,
                          HttpServletRequest req,
                          HttpServletResponse resp)
                   throws OneWireIOException,
                          OneWireException

Retrieves a value from the given container. This simple implementation only reads values from temperature, humidity, and clock containers.

Parameters:

a - the port adapter, for exclusive calls, etc.

c - the 1-Wire container object

req - the HTTP request object, for extracting request parameters, etc.

resp - the HTTP response object, for setting the status, if needed, etc.

Throws:

OneWireIOException

OneWireException