Mail Portlet Synchronization Issue

Liferay Portlet doesn't Synchronize all the mails properly. Though it shows the Mail Count in Pagination,the Pagination fails to work properly at a certain level.

This is due to some unusual characters in subject/sender/to/body in your mails.

You can resolve this by changing some column types from "mail_message" table.

Step 1: Please make sure that your database character set is "UTF-8".If it isn't then create it as follows:

create database testing character set utf-8



Step 2: Change "longtext" to "binary" for some column from "mail_message" table

as follows:

alter table Mail_Message modify column sender longtext character set binary;

alter table Mail_Message modify column to_ longtext character set binary;

alter table Mail_Message modify column cc longtext character set binary;

alter table Mail_Message modify column bcc longtext character set binary;

alter table Mail_Message modify column body longtext character set binary;

alter table mail_message modify column sender longtext charecter set binary

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Fileupload using service.xml file

I have done this in MVC portlet. File upload in liferay using service.xml file is bit tricky. With small modification in portlet-model-hints.xml we can achieve this.

Step 1: Give the data type as string to store the uploaded file.

entry in service.xml file

<entity name="FileUploader" table="fileuploader" local-service="true">

<column name="fid" type="long" primary="true"/>

<column name="content" type="String"/>

</entity>

Step 2 : Do 'ant build-service' from specific portlet level. As you know that which is used to generate the api to interact with database.

Step 3 : Open 'portlet-model-hints.xml' file which is in 'WEB-INF/src/META-INF'.

Initially this xml file look like this

<model-hints>

<model name="com.sample.mvc.model.FileUploader">

<field name="fid" type="long" />

<field name="content" type="String" />

</model>

</model-hints>

Depending on this xml file script files will generate which are in 'sql' folder.

Define 'hint-collection' tag for the 'content' column where i am storing the file content in this example.

Modified file will be as shown below.

<model-hints>

<model name="com.sample.mvc.model.FileUploader">

<field name="fid" type="long" />

<field name="content" type="String">

<hint-collection name="CLOBTYPE" />

</field>

</model>

<hint-collection name="CLOBTYPE">

<hint name="max-length">2000000</hint>

</hint-collection>

</model-hints>

Step 4 : Now do again 'ant build-service' to update the corresponding script files. This will update the sql script file. We can see the datatype of 'content' column in sql script as TEXT. When we deploy it will create CLOB type column in your database.

Step 5 : Write this logic in your action class to get the file from the jsp page and store it into the database.

public void abc(ActionRequest arq,ActionResponse ars) throws Exception {

UploadPortletRequest uploadRequest = PortalUtil.getUploadPortletRequest(arq);

FileUploader fileUp = new FileUploaderImpl();

fileUp.setFid(CounterLocalServiceUtil.increment("FileUploader.class"));

File file = uploadRequest.getFile("file");

byte[] bytes = FileUtil.getBytes(file);

fileUp.setContent(Base64.objectToString(bytes));

FileUploaderLocalServiceUtil.addFileUploader(fileUp);

}

Your JSP page something look like this :

<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>

<portlet:defineObjects />

<%@page import="javax.portlet.PortletURL"%>

<portlet:actionURL name="abc" var="actionURL1"></portlet:actionURL>

<form action="<%= actionURL1.toString() %>" method="post" enctype="multipart/form-data">

Name : <input type="text" name="urname" />

<input type="file" name="file"/>

<input type="submit" value="Submit" />

</form>

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Get Remote IP

To get the Client System's (Remote) IP Address through portlet request:

HttpServletRequest request = PortalUtil.getHttpServletRequest(actionrequest);

String clientIp = PortalUtil.getOriginalServletRequest(request).getRemoteAddr();

or

String clientIp = PortalUtil.getHttpServletRequest(request).getRemoteAddr();

--
Warm Regards,

K.Gnaniyar Zubair,

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Portlet to Portlet Communication

Introduction

The first version of the portlet specification, JSR-168/portlet1.0, did not include any support for Inter Portlet Communication. The second version, JSR-286/ portlet2.0, which is supported for IPC Mechanism.

IPC is made easy with JSR-286 to share the data between two portlets. Using IPC mechanisms, we can share the data from ACTION to VIEW phase and VIEW-VIEW Phase.

There are 3 ways to share the data between 2 portlets.

1. Portlet session

2. IPC Mechanisms

2.1 Public Render Parameters

2.2 Event

2.3 Client-Side IPC

3. Cookies

1.Portlet Session

By default , Each war has its own session and will not be shared with other wars. Liferay provides a mechanism by which Portlets can share session attributes across WARs.

A PortletSession is created for each user per portlet application. This makes the PortletSession useful for communicating all user related information among different portlets in the same portal application.

Step 1: set below attributes in Portlet1

liferay-portlet.xml :

<portlet>

<private-session-attributes>false</private-session-attributes>

</portlet>

Step 2: To set the Session:

PortletSession session = renderRequest.getPortletSession();

session.setAttribute("sessionValue",some-value , PortletSession.APPLICATION_SCOPE);

Step 3 : Get the Session Value in Portlet2

PortletSession ps = renderRequest.getPortletSession();

String tabNames = (String)ps.getAttribute("sessionValue ",ps.APPLICATION_SCOPE);

=====================================================================

2. IPC Mechanism

2.1 Public Render Parameter : IPC ( Inter Portlet Communication) :

In JSR 168, the render parameters set in processAction is only available in the render of the same portlet. With the Public Render Parameters feature, the render parameters set in the processAction of one portlet will be available in render of other portlets also.

By adding the following property in portlet-ext, we can enable portlets to share render states with other portlets that are on different pages:

portlet.public.render.parameter.distribution=ALL_PORTLETS

Step 1: Add below attribute in “Sender-Portlet”

<portlet-app>

<portlet>

<supported-public-render-parameter>

id1

</supported-public-render-parameter>
</portlet>

<public-render-parameter>

<identifier>id1

<qname xmlns:x="http://abc.com/userId">x:param1

</public-render-parameter>

</portlet-app>

Note: We can declare a list of public paramters for a portlet application.

Step 2:

We can set render parameter in the processAction() method by using the defined public render parameter identifier as the key.

response.setRenderParameter("id1", “someIdValue”);

e.g.

public void processAction(ActionRequest request, ActionResponse response)

throws IOException, PortletException { ........

response.setRenderParameter("id1", “someIdValue”); ........

}

Step 3 : Receiver Portlet Portlet “portlet.xml”

Specify the render parameter the portlet would like to share in the

portlet section.

<portlet-app>
< portlet >

< portlet-name >PortletB< /portlet-name >

<supported-public-render-parameter >id1< /supported-public-render-parameter >

< /portlet >

<public-render-parameter>

id1

x:param1

</public-render-parameter>

</portlet-app>

Step 4 :

A portlet can read public render parameter using following method

request.getPublicParameterMap()

Note:

Public render parameters are merged with regular parameters so can also be read using

request.getParameter(“id1”);

Step 5:

A portlet can remove a public render parameter by invoking following methods.

response.removePublicRenderParameter(“id1”)

------------------------------------------------------------------------------------------

2.2 Event : IPC ( Inter Portlet Communication) Mechanisms :

Portlet events that a portlet can receive and send.

In JSR-168 :
The only way to achive eventing was through portlet session.
Limitation : Portlet has to be in the same web application.

In JSR-286 :
JSR 286 (Portlet 2.0) defines a lifecycle for events, so that eventing is possible between portlets that are in different web applications.

By adding the following property in portal-ext, we can enable portlets to send and receive events from other portlets that are on different pages

portlet.event.distribution=ALL_PORTLETS

Step 1: Sender Portlet

portlet.xml

-----------

The portlet standard defines a way of telling the portlet container which portlet is responsible for sending an event.

<portlet-app>

<portlet>

<supported-processing-event xmlns:x='http://liferay.com'>

<qname>x:empinfoqname>

supported-processing-event>

</portlet>

<event-definition xmlns:x='http://liferay.com'>

<qname>x:empinfoqname>

<value-type>java.lang.Stringvalue-type>

</event-definition>

</portlet-app>

Step 3 : Set the event in process action:

javax.xml.namespace.QName qName =

new QName("http://liferay.com", "empinfo", "x");

response.setEvent(

qName,

"Hai You have received Event Data sent from Sender Portlet");

Step 4: Listner Portlet

portlet.xml:

-----------

<portlet-app>

<portlet>

<supported-processing-event xmlns:x='http://liferay.com'>

<qname>x:empinfoqname>

supported-processing-event>

</portlet>

<event-definition xmlns:x='http://liferay.com'>

<qname>x:empinfoqname>

<value-type>java.lang.Stringvalue-type>

</event-definition>

</portlet-app>

Step 5: get the EVENT:

This Even will be called after processAction as shown in the picture:

Lifecycle for IPC Event:

@javax.portlet.ProcessEvent(qname = "{http://liferay.com}empinfo")

public void handleProcessempinfoEvent(

javax.portlet.EventRequest request, javax.portlet.EventResponse response)

throws javax.portlet.PortletException, java.io.IOException {

javax.portlet.Event event = request.getEvent();

String value = (String) event.getValue();

System.out.print("value in process event>>>>>>>>>" + value);

response.setRenderParameter("empInfo", value);

}

------------------------------------------------------------------------------------------

2.3 Client-Side IPC :

There are 2 APIs for client side IPC.

Event generation (call from portlet A):

Liferay.fire('', {
name : value
});

e.g.
Liferay.fire('planTravel', {
origin : 'pune',
destination : 'mumbai'
});

Event Listener ((call from portlet B):

Liferay.on('', function(event) {

});

e.g.
Liferay.on('planTravel', function(event) {
showNews('', event.origin);
showNews('', event.destination);

});

===============================================

3. Cookies

Other than the IPC mechanism, There is an easiest way to get the data between portlets on different pages called COOKIES.

But there are some limitations for cookies that it will not accept more than 4KB size datas and the biggest limitation is, the 20 cookies per server limit, and so it is not a good idea to use a different cookie for each variable that has to be saved

Portlet 1 :

To Set the Cookies through jQuery :

function setCookie(docURL) {

jQuery.cookie("cookieParam",docURL);

}

To Set the Cookies through java / jsp:

HttpServletResponse response = PortalUtil.getHttpServletResponse(

actionResponse);

Cookie cookieParam = new Cookie("cookieParam ", password);

response.addCookie(cookieParam);

Portlet 2:

To get the Cookies through jQuery :

jQuery.cookie("cookieParam ");

To get the Cookie through java/ jsp :

String sessionid = "";

Cookie[] cookies = request.getCookies();

if (cookies != null) {

for (int i = 0; i <>

if (cookies[i].getName().equals("cookieParam ")) {

sessionid = cookies[i].getValue();

break;

}

}

}

Gnaniyar Zubair

rasikow@gmail.com

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