org.histpop.server
Class TestServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.histpop.server.TestServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

OHPRServlet

public class TestServlet
extends javax.servlet.http.HttpServlet

See Also:

Serialized Form

Field Summary

protected PageFactory	pageFactory
protected SQLRepository	repository

Constructor Summary

TestServlet()

Method Summary

void	addMethod(java.lang.String name, java.lang.String class_str)
void	applicationInit(javax.servlet.ServletContext ctx) Method for implementing special servlet startup code.
boolean	connectionToRepositoryIsClosed(ServerContext ctx) Check if connection to repository is still there.
void	destroy()
protected HTMLHandler	displayError(java.lang.String result, ServerContext ctx) Standard error handler which can be overridden by subclasses to fill in more stuff into a standard error template.
protected void	displayException(ServerContext ctx, java.lang.Throwable ex)
protected void	displayResult(ServerContext ctx, java.lang.Object result)
void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
void	doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
protected void	executeRequest(ServerContext ctx)
protected static java.lang.String	getStackTrace(java.lang.Throwable e, boolean html)
void	init(javax.servlet.ServletConfig config)
void	processRequest(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp) The main method for processing a request.
protected void	write(ServerContext ctx, HTMLHandler data)

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, 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

Field Detail

pageFactory

protected PageFactory pageFactory

repository

protected SQLRepository repository

Constructor Detail

TestServlet

public TestServlet()

Method Detail

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Servlet

Overrides:

destroy in class javax.servlet.GenericServlet

init

public void init(javax.servlet.ServletConfig config)
          throws javax.servlet.ServletException

Specified by:

init in interface javax.servlet.Servlet

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

addMethod

public void addMethod(java.lang.String name,
                      java.lang.String class_str)

applicationInit

public void applicationInit(javax.servlet.ServletContext ctx)

Method for implementing special servlet startup code. This method can be overridden by sub classes for application specific initialisation. For example it can be used to add generic methods to the executor.

Parameters:

ctx - The servlet context with request, response, and session objects.

doGet

public void doGet(javax.servlet.http.HttpServletRequest req,
                  javax.servlet.http.HttpServletResponse resp)

Overrides:

doGet in class javax.servlet.http.HttpServlet

doPost

public void doPost(javax.servlet.http.HttpServletRequest req,
                   javax.servlet.http.HttpServletResponse resp)

Overrides:

doPost in class javax.servlet.http.HttpServlet

processRequest

public void processRequest(javax.servlet.http.HttpServletRequest req,
                           javax.servlet.http.HttpServletResponse resp)

The main method for processing a request.
This method implements among others also an access control SUSPEND algorithm.

If an action is allowed conditional access, the current ServerContext is suspended automatically.

After an action has been taken a suspended context is resumed automatically if

1. The user explicitly asked to resume the previous context by sending the 'resume' parameter in the HTML request.

2. The action itself successfully completed and explicitly set the 'resumeAllowed' flag to TRUE.

3. The context is in a suspended state.

Parameters:

req - The http request

resp - The http response

connectionToRepositoryIsClosed

public boolean connectionToRepositoryIsClosed(ServerContext ctx)

Check if connection to repository is still there. This method can be overridden so as to provide more features such as clearing caches or freeing up resources when the connection is closed.

executeRequest

protected void executeRequest(ServerContext ctx)
                       throws java.lang.Exception

Throws:

java.lang.Exception

getStackTrace

protected static java.lang.String getStackTrace(java.lang.Throwable e,
                                                boolean html)

displayError

protected HTMLHandler displayError(java.lang.String result,
                                   ServerContext ctx)

Standard error handler which can be overridden by subclasses to fill in more stuff into a standard error template.

displayException

protected void displayException(ServerContext ctx,
                                java.lang.Throwable ex)
                         throws java.lang.Exception

Throws:

java.lang.Exception

displayResult

protected void displayResult(ServerContext ctx,
                             java.lang.Object result)
                      throws java.lang.Exception

Throws:

java.lang.Exception

write

protected void write(ServerContext ctx,
                     HTMLHandler data)
              throws java.lang.Exception

Throws:

java.lang.Exception