Interportlet Communication Issue - Help!!

We are in the process of converting our site to 8.1 and have bumped into a problem
with the interportlet communication. We have two portlets on a page that need
to listen to each other (a Shopping Cart portlet and a Shopping Content portlet).
We have specified on each portlet that it listen to the other and while that
does fire the corresponding action on both portlets, it always fires portlet A
before portlet B, even when we take an action on portlet B.
It seems strange to me that in a listening portlet situation, it will always fire
one before the other, regardless of where the action was taken.
Any help that can be provided would be greatly appreciated!
Thanks.

Hi Paul,
I had issues with the inter-portlet communication also. From my understanding
both portlets are listening to the same outer request. For example in the begin
action method of Portlet_2 I have:
HttpServletRequest outerrequest = ScopedServletUtils.getOuterRequest(getRequest());
String param1 = outerrequest.getParameter("param1");
if (param1.equals("some_value"))
// do something
In the JSP of my portlet_1 I have the following:
<% HttpServletRequest outerrequest =
ScopedServletUtils.getOuterRequest(request);
String actionURLB = outerrequest.getRequestURI() + "?";
%>
<a href="<%=actionURLB%>param1=1 ">Do First</a>
<a href="<%=actionURLB%>param1=2 ">Do Second</a>
I don't have the Portlet_1 listening to the outer request. You may want to also
look at the example in the examples provided from BEA which kind of helped me.
However, I had problems incorporating their code that they provided even though
they work well in the BEA examples.
Mansoor
"Paul Merrigan" <[email protected]> wrote:
>
We are in the process of converting our site to 8.1 and have bumped into
a problem
with the interportlet communication. We have two portlets on a page
that need
to listen to each other (a Shopping Cart portlet and a Shopping Content
portlet).
We have specified on each portlet that it listen to the other and while
that
does fire the corresponding action on both portlets, it always fires
portlet A
before portlet B, even when we take an action on portlet B.
It seems strange to me that in a listening portlet situation, it will
always fire
one before the other, regardless of where the action was taken.
Any help that can be provided would be greatly appreciated!
Thanks.

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Attachments:
Ethernet Issue.JPG ‏274 KB

Nathand,
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About the communication issues in the client-server program

About the communication issues in the client-server program
Hi, I have some questions about the communication issues in a java project, which is basically the client and server architecture. In brief, the client, written in java, can be deployed anywhere, and in the following part, assume it is in the LAN (Local Area Network) which is connnected to the internet through the firewall and/or proxy, and the server, written in
java too, simply provides the listening service on a port in a remote machine. And assume the server is connected to the internet directly so that the scenario can be simple to focus on the core questions.
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Generally, protocols at the application level like HTTP, FTP have their own default port, e.g., HTTP is corresponding to 80,
FTP is to 25. But it is NOT necessary for the web server to provide the HTTP listening service at port 80, right? E.g, Tomcat provides the HTTP listening service at 8080. So it means the default relationship between the application protocl and their port is some routine, which is not necessary to follow, right?
2 Assume a LAN connected to the internet through a proxy, which only allows HTTP protocol, then questions are:
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If using the TCP protocol directly, then on the client:the corresponding API is java.net.Socket, right? In both cases, the server side use the same API, java.net.ServerSocket?
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tutorials, books etc. In summary, what I care about is how to enable the java client behind the proxy and firewall to
communicate with the remote server without problems, so if you know some good tutorials plz let me know and thx in advance!
Finally, thanks for your attention so such long questions =).

FTP is to 25. But it is NOT necessary for the web
server to provide the HTTP listening service at port
80, right? E.g, Tomcat provides the HTTP listening
service at 8080. So it means the default relationship
between the application protocl and their port is
some routine, which is not necessary to follow,
right?Not sure what you're saying here.
There must be a server listening on some port. The client must know what port that is. If you open the connection using the Socket class, you'll explicitly specify the port. If you use some higher level class like URLConnection or something in the commons Net package, there's probably a default port that will be used if you don't explicitly specify another.
There's no way for the client to know that the HTTP request will go to port 80 instead of port 8080. If you think the the client contacts the server without explicitly naming a port, and then asks the server "get me your HTTP server", and the port is determined from that, you're mistaken.
Not sure if you're thinking that, but it sounded like you might be.
2 Assume a LAN connected to the internet through
a proxy, which only allows HTTP protocol, then
questions are:
2.1 Does the proxy recognize the HTTP request
from the client by the port number (carried in the
request string)? For example, when the server
provides the HTTP listening service at 80, then the
request from the client will include the port number
80, then the proxy will parse such info and decide if
or not the request can be out. I'm not sure, but I think most proxies and firewalls are configured by ports. I thought I'd heard of more sophisticated, higher-level ones that could understand the content to some degree, but I don't know anything about those.
3 In java programm, if using the HTTP protcol,
then on the client: the corresponding API is
java.net.URLConnection, right?That's one way.
You might want to look into this:
http://jakarta.apache.org/commons/httpclient/
If using the TCP protocol directly, then on the
client:the corresponding API is java.net.Socket,
right? In both cases, the server side use the same
API, java.net.ServerSocket? A Java client will user Socket, and a Java server will use ServerSocket and Socket.
Is it correct to say that the communication by Socket
is faster than URLConnection?Probably not.

Interportlet Communication Issue - Help!!

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