WSRP & inter portlet communication

Hi,
I have 2 remote portlets a) creating new account and b) for displaying list of accounts.
When a new account is created in "portlet a" I want to refresh "portlet b".
To do this I have put event (OnRefresh event) handler in portlet b with an action to call a page flow method of portlet b. This works like a charm.
While doing this I want to send newly created account number from portlet a to portlet b. How do I do this?
Thanks a lot.
Kam

Thanks a lot Anders.
I think I am very close to finish line. Just need one more answer.
This is what I did. JPF method, CreateAccount() of "Portlet A" fires custom event using PortletContext.fireCustomEvent API.
In "Portlet B" (using event handler wizard of weblogic workshop) I am performing following 2 actions ...
1) I am calling handlePortalEvent() method of backing file
2) Then call JPF method RefreshList()
In handlePortalEvent() method I get the custom event data (account number) successfully. But how do I pass this account number to RefreshList() method. I tried doing request.setAttribute in handlePortalEvent() and
request.setAttribute in RefreshList() but this doesn't work.
Thanks again.

Similar Messages

Inter Portlet communication without using workshop

Hi
Does any one have any luck trying to do inter portlet communication without using weblogic workshop IDE?

Hi Curt,
WLP's eventing system is designed such that portlet's don't have to care
whether the source/destination is local or remote. If you have a portlet
that fires/consumes events, when you create a proxy portlet on a
consumer, the portlet on the producer will be able to fire and receive
events without any changes to it. In this scenario, the proxy portlets
work with the WLP's event runtime to collect and dispatch events on
behalf of portlets on the producer. Going forward, WSRP 2.0 and
JSR168-next's eventing models will be mapped to the same WLP event runtime.
Subbu
Curt Smith wrote:
Thanks Subbu for your enlightenment here and in this group!!
You mentioned my next quest, WSRP'ifying my portlet & IPC system.
Can you suggest an WSRP example anywhere on the net or in bea?
I guessing that suitability of IPC is also a function of whether the portlets are the remote portlets or the local portlets.
Might a non-Bea IPC choice be usable within the local portlets, which are WSRP clients to stand alone remote portlets?
I can imagine now that you mention it that the remote WRSP producer portlets can't use just any IPC facility and the events be pushed inband to the consumer portal...
tnx curt

Inter portlet communication in SP4

Can any one tell me in step by step process with sample code to do inter portlet communication in SP4
Here i have 2 portlets
Portlet A and portlet B
Portlet A has 2 hyperlinks link1 and link2
When i click link1 or link2 in portlet A, i am passing a parameter,depends on the paramater i have to display some details in portlet B
Thanks
maria
[email protected]
Message was edited by marianair at Feb 10, 2005 2:27 AM

hi,
implement both portlets as page flow portlets. For both the links in portlet A, implement an action that generates an event and fires thisone. Then let the pageflow in portlet A show whatever content is appropriate, eg. the same as before the link.
Portlet B cathces this event and in the connected pageflow action does whatever it needs to do and redirects to the appripriate JSP.
Just remeber that you probably needs to use a custom event here.
For details on IPC and events, see doc:
http://e-docs.bea.com/workshop/docs81/doc/en/portal/howdoi/howInterPortletComm_wkshp.html
As an alternative you can use the SP3 mechanism, I find thisone somewhat more cumbersome and messy.
http://e-docs.bea.com/workshop/docs81/doc/en/portal/howdoi/howInterPortletComm.html
Feel free to post follow-ups if you get stuck.
- Anders M.

Event interface for inter-portlet communication

In which jar file can I find the com.bea.netuix.events.Event interface?
I wish to offer some support for inter-portlet communication while running inside a 8.1sp4 weblogic portal server.
Firstly, there is almost no documentation for working with Custom/Generic Events and definitely none for working with "Invoke a java portlet method"
Found out by decompiling the code that you can do the following:
add methodName(HttpServletRequest, HttpServletResponse, Event) to you backing file, or
add methodName(ActionRequest, ActionResponse, Event) to your java portlet
In both cases, I need find the jar file containing the "Event" interface. Have found most of the other classes in netuix_servlet.jar
Would also appreciate any further info on when the above methods actually get called with respect to the "processAction" and "processRender" methods for jsr168 portlets...

Found the answer after a pretty manual search - its located inside:
BEA_HOME/weblogic81/portal/lib/netuix/system/netuix_system.jar
All other interfaces being inside the WEB-INF/lib/netuix_servlet.jar, this one class from this package has been packed into a jar at the system classpath level!!
Had to manually look at the classpath in startWeblogic.cmd and then open up every jar file, follow dependent jar files via the manifest.mf etc...

Inter portlet communication using a float portlet

Hi,
I am trying to achieve inter portlet communication between a jsp portlet and a pageflow portlet.
The jsp portlet will open up as a pop up window or as a float portlet.
I am using BEA Weblogic 8.1 SP5.
Has any body tried this IPC when the jsp portlet is a float portlet?
If there is any documentation available for the same?
Thanks,
Shreesh

Hi,
Thanks for the reply.
In the search.jsp I am adding an action associated with a form bean, and passing the search string to the form, which will pass the request to the action method. This is the code snippet:
* @jpf:action
* @jpf:forward name="success" path="search.jsp"
protected Forward searchcriteria(SearchcriteriaForm form)
String searchString = form.getString();
try {
URL url = new URL("http://localhost/demo_search.asp");
HttpURLConnection http = (HttpURLConnection) url.openConnection();
http.setRequestMethod("POST");
PrintStream out=new PrintStream(http.getOutputStream());
out.println("searchParam=searchstring");
out.flush();
out.close();
BufferedReader reader=new BufferedReader(new InputStreamReader(http.getInputStream()));
reader.readLine();
String patternStr = "pattern";
Pattern pattern = Pattern.compile(patternStr);
Matcher matcher = pattern.matcher("<a href");
// Retrieve all lines that match pattern
String line = null;
while ((line = reader.readLine()) != null)
out.println("***"+line+"***");
matcher.reset(line);
if (matcher.find()) {
// line matches the pattern
} catch(Exception e)
e.printStackTrace();
return new Forward("success");
* FormData get and set methods may be overwritten by the Form Bean editor.
public static class SearchcriteriaForm extends FormData
private String string;
public void setString(String string)
this.string = string;
public String getString()
return this.string;
The question is what should be the return forward for the search coz, the result should be displayed in a seperate portlet. Also, how do I capture only the result in the result.jsp.
I would appreciate if you help me,
Thanks in Advance,
Sailatha

Struts Portlet - inter Portlet communication

Hi
How to make inter Portlet communication in Struts portlets?
Thanks
Subin

A quick google search brought back this:
http://download.oracle.com/docs/cd/B15904_01/portal.1012/b14134/pdg_java.htm

How to perform inter-portlet communication in alui6.1.

I want to perform perform inter-portlet communication in alui6.1. I don't have any clue to how to do it.
Can anyone help me.

Frankly, I did it using jQuery. When you have just two portlests on page, you can hardcode object id of second portlet in a code (not so nice, but very fast to see results). Otherwise you can use portlet settings to stay more environment independent.
In brief, in first portlet via ajax I request for data, using css selector jQuery, paste content to div in second portlet.

Inter portlet Communication - Events and Parameters

Hi,
I just tried a sample inter portlet communication using events and parameters.
I used the below code to enable inter portlet communication between two struts portlet.
UrlUtils.constructLink etc
The above works fine. Instead of link, I would like to use a form button to fire the event.
Is there any way of using button to fire the event.
Another thing I noticed is that when the event is fired the page gets refreshed.
How to enable inter portlet communication without the portal page refreshing.
Many Thanks in advance!!!!!!!!
-Chid

Hi Natu,
To start: read the documentation: http://download.oracle.com/docs/cd/B32110_01/webcenter.1013/b31074/jpsdg_java_adv.htm#CHDHDCGI
Then, you need to make sure the portlets can operate independently. That means: the locations portlet should be able to run without the incidents portlet.
What you should try to achieve is create a locations jspx that uses a page parameter with the incident number as input. The page can then be populated based on that id.
The key thing here is: input portlet variables are available as page parameters.
Then, you need to add some functionality to the incidents portlet to submit the selected incident number to the outside world. You can do this using some backing bean code. Example:
    public void transmitEvent(ActionEvent actionEvent) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ExternalContext externalContext = facesContext.getExternalContext();
        Object response = externalContext.getResponse();
        if (response instanceof javax.portlet.ActionResponse) {
            ActionResponse actionResponse = (ActionResponse)response;
            // setting the portlet OUT parameter
            String outResult = "my output";
            actionResponse.setRenderParameter("outParam", outResult);
       } else {
            // not in portlet environment
    }Hope this brings you further.
Jeroen van Veldhuizen

How we develop inter-portlet communication in plumtree portal using IDK

1)How we will develop inter-portlet communication in plumtree portal using IDK .
is it possiable using Master Detail Pattern? or any other alternate way.
Regards
Dheeraj Sai

This can be done by developing Adaptive Portlets:
http://edocs.bea.com/alui/devdoc/docs60/Portlets/Adaptive_Portlets/PlumtreeDevDoc_Integration_Portlets_Adaptive_Intro.htm

Inter-Portlet Communication Best Practices

Here's the situation:
There are 2 Portlets on a page; a Search Portlet and a List Portlet. When a user selects search criteria in the Search Portlet and presses the Submit button the items displayed in the List Portlet must be updated to reflect the search criteria that was entered.
My approach to implementing this:
When the user presses the Submit button the Search Portlet code will take the information entered by the user and create a searchObj. This searchObj will be attached to the Http Session object. When the Search Portlet is rendered again in the browser it will recognize (via a hidden HTML attribute) that it needs to inform the List Portlet that there is new search criteria. The browser will then generate a Portal Event that will cause the List Portlet to refresh its list based on the searchObj it finds attached to the Http Session object.
Question 1:
Assuming this is a reasonable approach how do I get the Search Portlet to generate an event based on a HTML hidden field at the time the Portlet is rendered?
Question 2:
Is there a better way to implement this type of functionality? Essentially the problem is that one Portlet needs to process some data and once it's done it needs to notify other Portlets. What are the best practices for this type of situation?
Any suggestions are welcome.

Hi,
As per the JSR 168 Specification, we follow PortletSession with APPLICATION_SCOPE for implementing IPC ( inter portlet communication ).
Here are the steps for IPC:-
1. When you press submit from search portlet then fetch the search string value into the processAction method of the search portlet.
2. Put the search string value in the portlet session with APPLICATION_SCOPE.
3. When you press submit of search portlet, doView() method of both the portlets
( Search and List ) will be called.
4. in the doView() method of List portlet retrieve the search string from the portlet session and call the business logic based on the search criteria.
5. Put the search result into bean or as per your framework design.
6. Iterate the bean value on to your List portlet rendering jsp.
Note:-Here it is assumed that both the portlets are in the same ear/war.
The coming JSR 286 specification, allows a portlet to send and receive events and perform state changes or send further events as result of processing an event.
In JSR 286, we would be having one more request and reponse called EventRequest and EventResponse.
Comments and suggestions are welcome for IPC.
Thanks
<Neeraj Sidhaye/>
Try_Catch_Finally AT YAHOO DOT COM
http://ExtremePortal.blog.co.uk

Inter Portlet Communication for JSR 168 Portlets

Hi,
I want to invoke one JSR168 Portlet from another and also pass parameters between the two.I did the same using Events for Oracle Portlets.
I would like to know how to do the same when I build JSR 168 Portlets.
Also Pls let me know where I can get documentation which describes all the possible options that I can try out on JSR168 Portlets
Regards
Yash

Hello Yash,
The current version of the specifications does not support Parameter and Events that allow you to create portlet 2 portlet communication using OracleAS Portal framework.
If the reusability of the parameter is not a major requirement of your application you can simply use URL parameters and this will authorize you implement that.
Regards
Tugdual Grall

Remote Inter Portlet Communication for JSR 168

Hi All,
We are stuck in a big problem using JSR 168 as remote portlets. We will be relieved if someone can suggest few ideas on this. I will provide the scenario which we are trying now.
We have two portlets namely portlet A and portlet B which are Java(JSR 168) type portlets. These two portlets are offered as remote and they reside in the producer application. We have consumed these two portlets in our consumer application.
The portlet A is triggering an event and portlet B is listening to the event triggered by portlet A. Currently we are trying to implement this functionality using Ajax. We tried to use customEventUrl tag in our jsp belonging to portlet A and we finally figured out that customEventUrl will not work in Remote portlets. We are not sure as how to pass the information from remote portlet A to remote portlet B. Please let us know your thoughts about this as whether the implementation is really possible when using Remote portlets.
IMPORTANT NOTE: The event handling and the configuration code that we have made in the above scenario is working perfectly for non-remote java portlets. The problem is occurring only when we consume them in the consumer application.
Thanks
Vijay

Hello Ashwin,
What version of WebLogic Portal are you using? And is this the same for both the consumer and producer?
If you are using WLP 10.3.2 I would highly recommend using JSR286 portlets (the next version of the Java Portlet (JSR168) specification) and the JSR286-standard eventing. The JSR286 eventing model is actually much cleaner and easier to understand than the WLP-proprietary support for events in JSR168 portlets.
However, if you are using a version of WLP prior to 10.3.2 and can't upgrade, JSR168-style events are your only choice. I can give you examples, but they all look very similar to the examples in the online documentation.
When events work between portlets locally, but not over WSRP, the usual problems are:
- There is one or more of "onlyIfDisplayed", "sourceDefinitionLabels" or "sourceInstanceLabels" attributes declared on the handle*Event element in the .portlet file. These attributes restrict when the portlet should receive an event, and they usually don't work the way you think when running over WSRP. It is best to not use these attributes for portlets which are going to be used over WSRP.
- A payload is being sent with the event which is not actually serializable. If serialization of the event payload (which is required for versions of WLP prior to 10.3.2 for WSRP) fails, the event will not be delivered to the portlet.
- The producer may be configured to not accept events. Check your producer's WEB-INF/wsrp-producer-config.xml file; the "service-config" element should either not have an "offer-extensions" attribute, or this attribute's value should be "true".
- The events may be getting sent during a portlet lifecycle other than processAction or handleEvent. There is no way for WSRP to handle events which have been sent during preRender or render, so it simply doesn't work.
- In the case of JSR168 portlets, if you have a backing file on the portlet (in addition to the portlet implementation as well), that may not work in some circumstances over WSRP. It is best to have the event handlers be in the portlet implementation class and avoid the use of backing files for JSR168 portlets.
If none of those things help you, my suggestion would be to post a sample .portlet file for one of the portlets that is supposed to be receiving the event, as well as the method signature in that portlet's implementation class that is supposed to be receiving the event, and the code which is sending the event that is supposed to be received.
Kevin

Inter portlet communication, load order, portal server 7

Hi.
I�m struggling with a portlet application, which uses interportlet communication. PortletOne creates an ArrayList of objects and add the list to the portletSession. PortletTwo displays the first object in the ArrayList.
The trouble seams to be the load order of the portlets. If portletTwo loads before PortletOne, the ArrayList is empty, and it displays nothing.
Any idea how I can be sure that my page loads PortletOne before PortletTwo?

If your intention is to transfer data(Array List of Objects) from from one portlet to the other, you need to use InterPortlet Communication API rather than putting the data in the session. In the first portlet set the event data and fire the event and in the second portlet, get the event data.
The order in which the events are fired is not guaranteed. i.e if portlet fires an event to portlet1, portlet2 and portlet3, the order in which the portlet1, 2 & 3 will receive the events is not guaranteed. Load order of portlets does not cause any problems.

Inter-Portlet Communication Doesn't work with Eventing

Hi All!
According to the document Adding "Parameters and Events to Portlets"
http://portalstudio.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/ARTICLES/adding.parameters.events.to.portlets.html
you can use Events, Page and Portlet-Input parameters to send a message from one portlet to another. I have two
portlets one of them is showing contents with a certain ID and LanguageID and the another one shows a sitemap.
Now I want to send the ID and LagngID to the contetn portlet as soon as I click on a link on the sitemap.
So this is what I've done:
1.) Definition of Input-Parameters and Events in provider.xml. The content portlet
has two input parameters for receiving informations about ID anf LangID
<portlet class="oracle.portal.provider.v2.DefaultPortletDefinition">
<id>20</id>
<name>pbContent</name>
<title>pirobase Content</title>
<acceptContentType>text/html</acceptContentType>
<inputParameter class="oracle.portal.provider.v2.DefaultParameterDefinition">
<name>menuID</name>
<displayName>Input Parameter for pirobase menu ID</displayName>
<description>Input Parameter for pirobase menu ID</description>
</inputParameter>
<inputParameter class="oracle.portal.provider.v2.DefaultParameterDefinition">
<name>langID</name>
<displayName>Input Parameter for pirobase language ID</displayName>
<description>Input Parameter for pirobase language ID</description>
</inputParameter>
<renderer class="oracle.portal.provider.v2.render.RenderManager">
<renderContainer>true</renderContainer>
<contentType>text/html</contentType>
<showPage>/htdocs/pirobase/pbcontent.jsp</showPage>
     <pageParameterName>next_page</pageParameterName>
</renderer>
</portlet>
The Sitemap Portlet has an evend sending the two parameters
<portlet class="oracle.portal.provider.v2.DefaultPortletDefinition">
<id>21</id>
<name>pbSitemap</name>
<title>pirobase Sitemap Portlet</title>
<shortTitle>pirobase Sitemap</shortTitle>
<event class="oracle.portal.provider.v2.DefaultEventDefinition">
     <name>changePirobaseContentPage</name>
     <description>Change the pirobase menu displayed in this portlet</description>
     <parameter class="oracle.portal.provider.v2.DefaultParameterDefinition">
          <name>menuID</name>
          <displayName>menuID</displayName>
          <description>The menuID of the new page</description>
     </parameter>
     <parameter class="oracle.portal.provider.v2.DefaultParameterDefinition">
          <name>langID</name>
          <displayName>Language ID</displayName>
          <description>The language of that should be displayed</description>
     </parameter>
</event>
<renderer class="oracle.portal.provider.v2.render.RenderManager">
<contentType>text/html</contentType>
<showPage>/htdocs/pirobase/pbsitemap.jsp</showPage>
<pageParameterName>next_page</pageParameterName>
</renderer>
</portlet>
2.) In addition to that I have defined to page variables on the page the two
portlets are located. Then I've associated the input parameters of the content
portlet to the page parameters and the also the event parameters of the
sitemap portlet.
3.) Within the sitemap JSP I use this code to create the event link
String getEventUrl (HttpServletRequest request, long menuID,
int langID){
PortletRenderRequest prr = (PortletRenderRequest)
request.getAttribute(HttpCommonConstants.PORTLET_RENDER_REQUEST);
String eventName = "changePirobaseContentPage";
String eventParamID = EventUtils.eventParameter("menuID");
String eventParamLang = EventUtils.eventParameter("langID");
oracle.portal.utils.v2.NameValuePair[] eventParams =
new oracle.portal.utils.v2.NameValuePair[2];
eventParams[0] = new NameValuePair(eventParamID, ""+menuID);
eventParams[1] = new NameValuePair(eventParamLang, ""+langID);
try {
return EventUtils.constructEventLink(prr,eventName,
eventParams,
true,
true);
} catch ( PortletException pe ) {
makeErrLog ("Could not create event URL for pbContent Portlet!",
pe);
return "";
4.) Within the Content JSP file I use this code to get the page parameter
menuID = portletRequest.getParameter("menuID");
But Actually nothing happens :-( It seems that the event never arrives to the page. Does anyone
know what I am doing wrong here?

When the event parameters are to be posted to the same page, make
sure you have selected the current page in "Go to page" option when
the event is raised.
For a more detailed answer, have a look at the following thread -
Problem with DELETE
-AMJAD.

Problems with Inter-Portlet Communication in Weblogic Portal 10.3

Hi,
I'm developing a web application using Weblogic Portal 10.3.
The requirement is that the work requests have to be stored in a workbasket which can be submitted by the user at the end.
The user can create multiple request of same form.
Consider a scenario that the user creates 5 instances or work request in a single form. No he moves back to the 2nd request and modifies it. While modifying the 2nd request a validation message is thrown. Now the user navigates to Workbasket directly by selecting the Workbasket from the menu item.
Now when the user selects any one of the 5 requests, he is able to view the same validation message which is thrown as said in the above scenario. This is happening only when the user navaigates from the workbasket. If the user switches between the request, the problem is not simulated.
Someone please help me how this can be avaoided.
More Information:
Weblogic Portal 10.3
JSF 1.2
Spring
Message is thrown using the FacesMessage in JSF and is displayed in the screen using the following JSF tag.
<h:messages globalOnly="true" rendered="#{! empty facesContext.maximumSeverity}" styleClass="liststylenone"/>

Hi,
Could someone pls explain which cache is used to cache portlet content and in which form the content is cached?

WSRP & inter portlet communication

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