uk.org.ogsadai.activity.delivery
Class DeliverToStreamServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--uk.org.ogsadai.activity.delivery.DeliverToStreamServlet

All Implemented Interfaces:

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

public class DeliverToStreamServlet

extends javax.servlet.http.HttpServlet

Servlet to provide streaming HTTP delivery of results. This works with the uk.org.ogsadai.activity.delivery.DeliverToStreamActivity activity.

Author:

The OGSA-DAI Project Team

See Also:

Serialized Form

Field Summary

private static java.lang.String	COPYRIGHT_NOTICE Copyright statement
private static DAILogger	LOG Logger object for logging in this class
private static java.util.Map	streamTable Current set of data avaiting collection indexed by sessionID:streamID.

Fields inherited from class javax.servlet.http.HttpServlet

Fields inherited from class javax.servlet.GenericServlet

Constructor Summary

DeliverToStreamServlet()

Method Summary

static void	addStream(java.lang.String url, java.lang.String resourceId, SessionID sessionId, java.lang.String streamId, BlockReader reader) Add a data stream to the list of streams available from this servlet.
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
private static java.lang.String	getIndex(java.lang.String url, java.lang.String resourceId, java.lang.String sessionId, java.lang.String streamId) Form an index from a URL, resource ID, session ID and stream ID to uniquely identify data.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, 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

Field Detail

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

Copyright statement

See Also:

Constant Field Values

LOG

private static final DAILogger LOG

Logger object for logging in this class

streamTable

private static java.util.Map streamTable

Current set of data avaiting collection indexed by sessionID:streamID.

Constructor Detail

DeliverToStreamServlet

public DeliverToStreamServlet()

Method Detail

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  java.io.IOException

Overrides:

doGet in class javax.servlet.http.HttpServlet

javax.servlet.ServletException

java.io.IOException

addStream

public static void addStream(java.lang.String url,
                             java.lang.String resourceId,
                             SessionID sessionId,
                             java.lang.String streamId,
                             BlockReader reader)

Add a data stream to the list of streams available from this servlet.

Parameters:

url - Local part of service URL (e.g. ogsadai/DataService).

resourceId - Data service resource ID.

sessionId - Session ID

streamId - Data stream ID.

reader - Data stream.

getIndex

private static java.lang.String getIndex(java.lang.String url,
                                         java.lang.String resourceId,
                                         java.lang.String sessionId,
                                         java.lang.String streamId)

Form an index from a URL, resource ID, session ID and stream ID to uniquely identify data.

Parameters:

url - Local part of service URL (e.g. ogsadai/DataService).

resourceId - Data service resource ID.

sessionId - Session ID

streamId - Data stream ID.

Returns:

string of form url/resourceID/sessionID/stringID