org.mortbay.cometd
Class AbstractCometdServlet
java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
org.mortbay.cometd.AbstractCometdServlet
- All Implemented Interfaces:
- Serializable, Servlet, ServletConfig
- Direct Known Subclasses:
- ContinuationCometdServlet
public abstract class AbstractCometdServlet
- extends HttpServlet
Cometd Filter Servlet implementing the AbstractBayeux protocol.
The Servlet can be initialized with a json file mapping channels to
DataFilter definitions. The servlet init parameter "filters" should
point to a webapplication resource containing a JSON array of filter
definitions. For example:
[
{
"channels": "/**",
"class" : "org.mortbay.cometd.filter.NoMarkupFilter",
"init" : {}
}
]
The following init parameters can be used to configure the servlet:
- timeout
- The server side poll timeout in milliseconds (default 250000). This is how
long the server will hold a reconnect request before responding.
- interval
- The client side poll timeout in milliseconds (default 0). How long a client
will wait between reconnects
- multiFrameInterval
- the client side poll timeout
if multiple connections are detected from the same browser (default 1500).
- JSONCommented
- If "true" then the server will accept JSON wrapped
in a comment and will generate JSON wrapped in a comment. This is a defence against
Ajax Hijacking.
- alwaysResumePoll
- If true, then reconnect requests will always
be resumed when a message is delivered. This may be needed for some cross domain
transports that need strict ordering of responses.
- filters
- the location of a JSON file describing
DataFilter instances to be installed
- loglevel
- <0=none, 1=info, 2=debug/dd>
- Author:
- gregw, aabeling: added JSONP transport
- See Also:
AbstractBayeux},
ChannelId},
Serialized Form
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CLIENT_ATTR
public static final String CLIENT_ATTR
- See Also:
- Constant Field Values
TRANSPORT_ATTR
public static final String TRANSPORT_ATTR
- See Also:
- Constant Field Values
MESSAGE_PARAM
public static final String MESSAGE_PARAM
- See Also:
- Constant Field Values
TUNNEL_INIT_PARAM
public static final String TUNNEL_INIT_PARAM
- See Also:
- Constant Field Values
HTTP_CLIENT_ID
public static final String HTTP_CLIENT_ID
- See Also:
- Constant Field Values
BROWSER_ID
public static final String BROWSER_ID
- See Also:
- Constant Field Values
_bayeux
protected AbstractBayeux _bayeux
_timeout
protected long _timeout
AbstractCometdServlet
public AbstractCometdServlet()
getBayeux
public AbstractBayeux getBayeux()
newBayeux
protected abstract AbstractBayeux newBayeux()
init
public void init()
throws ServletException
- Description copied from class:
GenericServlet
- A convenience method which can be overridden so that there's no need
to call
super.init(config).
Instead of overriding GenericServlet.init(ServletConfig), simply override
this method and it will be called by
GenericServlet.init(ServletConfig config).
The ServletConfig object can still be retrieved via GenericServlet.getServletConfig().
- Overrides:
init in class GenericServlet
- Throws:
ServletException - if an exception occurs that
interrupts the servlet's
normal operation
service
protected void service(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException,
IOException
- Description copied from class:
HttpServlet
- Receives standard HTTP requests from the public
service method and dispatches
them to the doXXX methods defined in
this class. This method is an HTTP-specific version of the
Servlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) method. There's no
need to override this method.
- Overrides:
service in class HttpServlet
- Parameters:
req - the HttpServletRequest object that
contains the request the client made of
the servletresp - the HttpServletResponse object that
contains the response the servlet returns
to the client
- Throws:
ServletException - if the HTTP request
cannot be handled
IOException - if an input or output error occurs
while the servlet is handling the
HTTP request- See Also:
Servlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
browserId
protected String browserId(HttpServletRequest request)
newBrowserId
protected String newBrowserId(HttpServletRequest request,
HttpServletResponse response)
Copyright © 2007 Mort Bay Consulting. All Rights Reserved.