Using the language bean from XPages Toolkit for Internationalization

Introduction

You have people who tend to tick around where they live and work and you have people who tend to switch location now and then. Especially in Europe which is divided into many countries with many different languages, somehow operating under one flague,  you are sometimes amazed that organizations have not fully adapted to the trend of “travelling” co-workers.

different langiages

If you are lucky an application is presented bilingual but in a lot of occasions an application is presented either in English (when that is the official language of communication) or in a native language where the application is initiated and being used.

But what if that cross-border European co-worker enters the work floor?

Internationalization

Internationalization refers to the process whereby you prepare your application for users from varied geographies. There are two parts to this:

The need for localization is obvious; a German user wants to see an application in German and a French user in French, and so on. Localization involves making different language versions of all the application’s user interface available and ensuring the correct strings are used based on user preferences.

Support in XPages

In the IBM Notes and Domino Application Development wiki you can learn about the support for internationalization in XPages.

In this post I will describe how you can use the language bean that is part of the XPages Toolkit available in OpenNTF.

Sample application

In this post we will build a simple XPages UI which looks as followed:

sample

In a combo-box you get presented a list with available language options. And based upon your selection values will be collected from a set of property files.

I will include a dropbox link to the sample application.

Walkthrough

First: download & install the library. Beside the library there is also a sample application which comes in handy to borrow code from.

Java classes

The following files you will need:

class

Property files

The property files contain the actual string values. The amount of files depends on the number of languages you want to support. In our case 4: English (default), Swedish, German and Dutch. There will be three types of files: general, contacts and keywords.  That makes 12 (4*3) in total.

propfiles

Here is what the files could look like. First the general poperties file:

AppTitle=Language Bean
Formula=Formula
Bean=Bean
NotAvailable=Not Available
SwitchLanguage=Choose Your Language
Select=Select
Header=Demo Language Bean
SubHeader=Register A Person
Submit=Submit

Which becomes in Swedish:

AppTitle=Språk Böna
Formula=Formel
Bean=Böna
NotAvailable=Inte Tillgänglig
SwitchLanguage=Välj Ditt Språk
Select=Välj
Header=Demo Språk Böna
SubHeader=Registrera En person
Submit=Skicka

The contacts properties files:

LastName=Last Name
FirstName=First Name
Gender=Gender
Hair=Hair

In German:

LastName=Nachname
FirstName=Vorname
Gender=Geschlecht
Hair=Har

And at last the keywords properties file:

Male=male
Female=female
White=white
Brown=brown
Black=black
Red=red

Which becomes in Dutch:

Male=mannelijk
Female=vrouwelijk
White=wit
Brown=bruin
Black=zwart
Red=rood

The properties files are “registrered” in the language bean via the following method:

public List<String> getPropertyFileNames() {
List<String> propertyFileNames = new ArrayList<String>();
propertyFileNames.add(“contact”);
propertyFileNames.add(“keywords”);
propertyFileNames.add(“general”);
return propertyFileNames;
}

Layout custom control

My demo app contains 2 pages which demonstrates the 2 options you have with the toolkit: use the language bean or the toolkit @formula.

<?xml version=”1.0″ encoding=”UTF-8″?>
<xp:view xmlns:xp=”http://www.ibm.com/xsp/core&#8221; xmlns:xe=”http://www.ibm.com/xsp/coreex”&gt;
<xe:applicationLayout id=”applicationLayout1″><xp:this.facets>
<xp:panel xp:key=”LeftColumn”>
<xe:navigator id=”navigator1″>
<xe:this.treeNodes>
<xe:pageTreeNode page=”/bean.xsp”>
<xe:this.label><![CDATA[#{javascript:xptI18NBean.getValue(“general.Bean”)}]]></xe:this.label>
</xe:pageTreeNode>
<xe:pageTreeNode page=”/formula.xsp”>
<xe:this.label><![CDATA[#{javascript:xptI18NBean.getValue(“general.Formula”)}]]></xe:this.label>
</xe:pageTreeNode>
</xe:this.treeNodes>
</xe:navigator></xp:panel></xp:this.facets>
<xp:callback facetName=”facet_1″ id=”callback1″></xp:callback>
<xe:this.configuration>
<xe:simpleResponsiveConfiguration navbarText=”Language Bean”
collapsedLeftMenuLabel=”Pages”>
<xe:this.navbarUtilityLinks>
<xe:basicLeafNode
href=”https://quintessens.wordpress.com/&#8221;
label=”Kwintessential Notes” title=”Visit My Site”>
</xe:basicLeafNode>
<xe:basicLeafNode
href=”http://www.openntf.org/main.nsf/project.xsp?r=project/XPages%20Toolkit&#8221;
label=”XPages Toolkit” title=”Visit Project on OpenNTF”>
</xe:basicLeafNode>
</xe:this.navbarUtilityLinks>
</xe:simpleResponsiveConfiguration>
</xe:this.configuration>
</xe:applicationLayout>
</xp:view>

Bean XPage

I will spare you the  complete code for the Bean page. Check the download if you want the complete code.  The principle is simple. You collect the value via the following pattern

xptI18NBean.getValue(“[properties file].[key]”)

That could become something like:

xptI18NBean.getValue(“general.SwitchLanguage”)

Switching language

In order to switch language a combobox control is presented with the following code:

<xp:comboBox id=”cbSwitchLanguage” defaultValue=”#{javascript:xptI18NBean.getCurrentLanguage()}”>
<xp:selectItems>
<xp:this.value>
<![CDATA[#{javascript:xptI18NBean.getAllLanguages()}]]>
</xp:this.value>
</xp:selectItems>
<xp:eventHandler event=”onchange” submit=”true” refreshMode=”complete”>
<xp:this.action>
<![CDATA[#{javascript:var sv = getComponent(“cbSwitchLanguage”).getValue()
if(sv != null && sv != “”) {
var locSet:Locale = new Locale(sv);
context.setLocale(locSet);
context.reloadPage();
}}]]>
</xp:this.action>
</xp:eventHandler>
</xp:comboBox>

Language options

The getAllLanguages method in the language bean “registers” the available language options:

public List<String> getAllLanguages() {
List<String> languages = new ArrayList<String>();
languages.add(“en”);
languages.add(“de”);
languages.add(“sv”);
languages.add(“nl”);
return languages;
}

That is basically it!

Formula XPage

This page differs from the Bean page in the way it accesses the property files. It uses a formula which is defined in the XPages Toolkit library.

The formula follows the following pattern:

@XPTLanguageValue(“[properties file].[keyword]”)

Which could become something like:

@XPTLanguageValue(“general.SwitchLanguage”)

Download

A sample application for download is available under the following URL.

Wrapup

I am curious what method you use to make your applications available in multiple languages. Please drop a line how you have solved it.

I found the language bean in the XPages Toolkit very intuitive and easy to use. At least in some cases it solves the problem nice and quickly so my thanks go out to it’s project members.

svenska

Adding a sliding menu to your Bootstrap Application Layout control

Introduction

Since responsive webdesign (RWD) is on top of the list in most application development projects these days I assume most of us have been looking at the options within IBM Notes.

Bootstrap

In case you use the Bootstrap plugin in the Extension Library you have noticed that the menu in the left column get presented above the main column in smaller devices.

bs_desktop

Image: Display on desktop

bs_phone

Image: Display on phone

As you can see in a more advanced application the menu options already suppress the content too much at the bottom. So what are your options?

Off Canvas Slide Menu For Bootstrap

In this post I will describe how I implemented in XPages a slide menu which is described here. We still use the Application Layout control with the Bootstrap RWD functionality since it contains more functionality than just to provide a navbar.

Step 1 – Provide a Menu icon

We need something (text, button, icon) from where we can initiate the appearance of the menu. In our case I choose to include a ‘hamburger’ menu icon in the navBarLogo property:

<xe:this.configuration>
<xe:simpleResponsiveConfiguration navbar=”true”
loaded=”true” navbarLogo=”/1432224591_menu-alt.png”
navbarLogoStyleClass=”extraMenu” navbarText=”MyApp”>
</xe:simpleResponsiveConfiguration>
</xe:this.configuration>

For example iconfinder provide great icons.

Step 2 – Register Click event for Menu icon

I included “extraMenu” as an additional styleclass. This styleclass we will use when the document is ready. We do this in a Script Block control:

<xp:scriptBlock id=”onLoadScript” type=”text/javascript”>

<xp:this.value><![CDATA[
$(document).ready(function(){
$(“.extraMenu“).attr(“id”,”nav-expander“);
//Navigation Menu Slider
$(‘#nav-expander‘).on(‘click‘,function(e){
e.preventDefault();
$(‘body’).toggleClass(‘nav-expanded’);
});
$(‘#nav-close’).on(‘click’,function(e){
e.preventDefault();
$(‘body’).removeClass(‘nav-expanded’);
});

// Initialize navgoco with default options
$(“.main-menu”).navgoco({
caret: ‘<span class=”caret”></span>’,
accordion: false,
openClass: ‘open’,
save: true,
cookie: {
name: ‘navgoco’,
expires: false,
path: ‘/’
},
slide: {
duration: 300,
easing: ‘swing’
}
});
});]]></xp:this.value>
</xp:scriptBlock>

When the document is ready we assign the ID attribute to the navbarLogo since this ID is used to bind an click event on. We could have bind the event directly on the class but I am not sure if the ID is used in any other way (don’t break what isn’t broken).

Step 3 – Provide a menu that slides in.

In this example I simply provide the menu that is used in the demo:

<nav>
<ul class=”list-unstyled main-menu”>
<!–Include your navigation here–>
<li class=”text-right”>
<a href=”#” id=”nav-close”>X</a>
</li>
<li><a href=”#”>Menu One<span class=”icon”></span></a></li>
<li><a href=”#”>Menu Two<span class=”icon”></span></a></li>
<li><a href=”#”>Menu Three<span class=”icon”></span></a></li>
<li>
<a href=”#”>Dropdown</a>
<ul class=”list-unstyled”>
<li class=”sub-nav”><a href=”#”>Sub Menu One<span class=”icon”></span></a></li>
<li class=”sub-nav”><a href=”#”>Sub Menu Two<span class=”icon”></span></a></li>
<li class=”sub-nav”><a href=”#”>Sub Menu Three<span class=”icon”></span></a></li>
<li class=”sub-nav”><a href=”#”>Sub Menu Four<span class=”icon”></span></a></li>
<li class=”sub-nav”><a href=”#”>Sub Menu Five<span class=”icon”></span></a></li>
</ul>
</li>
<li><a href=”#”>Menu Four<span class=”icon”></span></a></li>
<li><a href=”#”>Menu Five<span class=”icon”></span></a></li>
</ul>
</nav>

Step 4 – Include the supporting files

The demo uses the following files which you should add to your application as resources:

js

<script
src=”/jquery.navgoco.js”>
</script>

css

<xp:this.resources>
<xp:styleSheet href=”/main.css”></xp:styleSheet>
</xp:this.resources>

The result

The image below gives you an indication what the result looks like. When you click the hamburger icon the menu appears from the right. With the X marker you can close the menu again.

result

Notice that my content is not suppressed below the menu as the Bootstrap plugin would do.

Download

An demo XPages application is available on my dropbox account

Domino Access Service – Posting a document

Introduction

In our app described in previous posts I have included an interface to post a new document using Domino Access Services. Here is how I did it.

HTML structure

The main part of the ‘form’ is the HTML structure.

form

Since we use Bootstrap I included form-groups to layout the fields. In my example I still use XPages, but the inputfields you can replace with HTML input elements.

<form role=”form”>

<h2>Registration</h2>
<div id=”entryForm”>
<div class=”form-group”>
<xp:label value=”Firstname:” id=”label2″></xp:label>
<xp:inputText id=”inpFirstname” styleClass=”firstName”>
<xp:this.attrs>
<xp:attr name=”placeholder” value=”Enter firstname”></xp:attr>
</xp:this.attrs>
</xp:inputText>
</div>
<div class=”form-group”>
<xp:label value=”Lastname:” id=”label3″></xp:label>

<xp:inputText id=”inpLastname” styleClass=”lastName”>
<xp:this.attrs>
<xp:attr name=”placeholder” value=”Enter lastname”></xp:attr>
</xp:this.attrs>
</xp:inputText>
</div>
<div class=”form-group”>
<xp:label value=”Email:” id=”label1″></xp:label>
<xp:inputText id=”inpEmail” styleClass=”email” type=”email”>
<xp:this.attrs>
<xp:attr name=”placeholder” value=”Enter email”></xp:attr>
</xp:this.attrs>
</xp:inputText>
</div>
<div class=”form-group”>
<xp:label value=”Password:” id=”label4″></xp:label>
<xp:inputText id=”inpPassword” type=”” styleClass=”wannebepassword”>
<xp:this.attrs>
<xp:attr name=”placeholder” value=”Enter password”></xp:attr>
</xp:this.attrs>
</xp:inputText>
</div>
<xp:button value=”Submit” id=”button1″ styleClass=”btnRegister btn btn-default”>
</xp:button>
</div>
</form>
<div id=”formResponse”></div>

JavaScript

On the onClientLoad event of the XPage I have included the following script.

Parameters

Keep in mind to include the form name in the URL parameter (?form=Person) since you cannot include that pair in the JSON object that is send to Domino Access Service.

The &computewithform=true parameter ensures the HTTPPassword field will be translated with the @Password function.

<xp:eventHandler event=”onClientLoad” submit=”false”>
<xp:this.script>
<![CDATA[$(document).ready(function() {
$(“.wannebepassword”).attr(“type”, “password”);
$(“.btnRegister”).click(function(e) {
var firstName = $(“.firstName”).val();
var lastName = $(“.lastName”).val();
var email = $(“.email”).val();
var password = $(“.wannebepassword”).val();
var newName = $(“.firstName”).val() + ” ” + $(“.lastName”).val();
if (newName !== ” “) {
var newPersonObj = {
FirstName: firstName,
LastName: lastName,
FullName: newName,
InternetAddress: email,
HTTPPassword: password,
Form: “Person”
};
$.ajax({
url: ‘http://server/fakenames40k.nsf/api/data/documents?form=Person&computewithform=true&#8217;,
type: ‘POST’,
data: JSON.stringify(newPersonObj),
dataType: ‘xml’,
accepts: {
xml: ‘text/xml’,
text: ‘text/plain’
},
contentType: “application/json”
}).done(function(data, textStatus, jqXHR) {
var newPersonLocation = jqXHR.getResponseHeader(“Location”);
$(“#entryForm”).hide();
$(“#formResponse”).html(‘Registration successfull.<br/><a class=”btn btn-default” href=”‘ + newPersonLocation + ‘”>Check it out!</a>’);
}).fail(function(jqXHR, textStatus, errorThrown) {
alert(“Registration has failed:” + errorThrown);
console.log(‘Registration has failed.’);
});
} else {
alert(“Please enter a name”);
}
return false;
});
});]]>
</xp:this.script>
</xp:eventHandler>

Password attribute

XPages does not allow you to define the password type as attribute. I found the answer from Tim Tripcony on Stackoverflow helpful to define a work-around.

Wrap up

That is about it!

This is just a simple example. Probably you would normally include some more validation (avoid double entries) but you get the idea.

Adding search to our app

Introduction

In this post I will demonstrate how to apply a search to our application described in previous posts, in which we read the JSON from Domino Access Service and parse it with the Jackson library to display it thereafter with a Repeat control.

Since I am using in our application the Application Layout control with a responsive Bootstrap UI (shameless pitch to glory the persons who delivered this great functionality to XPages) which includes a searchBar section and scrolling through 40K of person records is not something you want to anguish your thumb with, a search functionality gives the advantage to skip scrolling through unnecessary documents.

searchBar section

Here is how I set up the searchBar section in the Application Layout control:

searchbar

As you can see I have defined a result page for the search, called search.xsp.

Here is how the search bar will look like for the user:

searchbox

XPage search

beforePageLoad event

The beforePageLoad event has slightly changed compared with event in our initial XPage. This time we search for the search parameter defined in the searchBar section:

var query = context.getUrlParameter(“search”);
var persons = new Array();
persons = personsBean.getPersons(“http://dev1/fakenames40k.nsf/api/data/collections/name/people?count=25&search=” + query);
viewScope.put(“names”,persons);

Next is the result list. I have added an additional list item and added the active class:

This item will display the search query we have provided:

acgtive

The Repeat control has also changed slighty. The rows property has been adjusted. We calculate the number of documents returned by the full text search.

<![CDATA[#{javascript:database.updateFTIndex(true);
var query:string = context.getUrlParameter(“search”);
var vw:NotesView = database.getView(“people”);
var totNums:Integer = vw.FTSearch(query).toFixed();
return totNums}]]>

Also the text that indicates where we are in the result set has been modified:

Tip: since we are actually performing FT searches here perhaps it is better to put the counted results already from our initial call in a scope variable and re-use it =(

The button in our infinite scroll function/custom control has also been adapted. Here is the code:

Here is what the end result looks like after a search:

endresult

Infinite scroll for our Domino Access Services & Jackson app

Introduction

In a previous post I demonstrated how to process JSON data from Domino Access Services with the Jackson library. In this post I follow up on that and demonstrate how you can apply an infinite scroll function to it so you can navigate through the presented list in a mobile app kinda way:

app

Class DASRest

Include Serializable

Since we are going to add more Java objects to our list we will use a scope variable to store the values in. Because of the usage we need to include serializable in our DASRest class:

package com.quintessens.FakeNames;

import java.io.Serializable;
import javax.ws.rs.core.MediaType;
import org.codehaus.jackson.map.ObjectMapper;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;

public class DASRest implements Serializable {

private static final long serialVersionUID = 1 L;

public static Person[] getPersons(String url) {
Person[] persons = null;
try {
ClientConfig config = new DefaultClientConfig();
Client client = Client.create(config);
WebResource service = client.resource(url);
String json = service.accept(MediaType.APPLICATION_JSON).get(String.class);
ObjectMapper mapper = new ObjectMapper();
persons = mapper.readValue(json, Person[].class);

} catch (Exception e) {
System.out.println(“catch…”);
e.printStackTrace();
}
return persons;
}
}

Managed Bean

We will also register our class as a Managed Bean in the faces-config.xml file:

<?xml version=”1.0″ encoding=”UTF-8″?>
<faces-config>
<managed-bean>
<managed-bean-name>personsBean</managed-bean-name>
<managed-bean-class>com.quintessens.FakeNames.DASRest</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>

beforePageLoad event

In the beforePageLoad event of the XPage where we will display the result list we will make the initial call to the Domino Access Service and collect the fist set of documents:

var persons = new Array();
persons = personsBean.getPersons(“http://dev1/fakenames40k.nsf/api/data/collections/name/people?count=25&#8243;)
viewScope.put(“names”,persons);

As you can see we still use the fakenames application. The received result we place in a viewScope variable. Now we need to bind this variable to a repeat control.

Repeat Control

Our repeat control looks pretty straight forward. I included already some mark-up since we will utilize Bootstrap for our UI presentation:

<ul class=”list-group”>
<xp:repeat id=”rptPersons” indexVar=”persIndex” var=”persData”>
<xp:this.value>
<![CDATA[#{javascript:viewScope.get(“names”)}]]>
</xp:this.value>
<xp:this.rows>
<![CDATA[#{javascript:var vw:NotesView = database.getView(“people”);
return vw.getAllEntries().getCount().toFixed();}]]>
</xp:this.rows>
<li class=”list-group-item”>
<xp:text escape=”true” id=”computedField1″ value=”#{javascript:return persData.name}”>
</xp:text>

</li>
</xp:repeat>
</ul>

Infinite Scroll

My infinite scroll function is inspired by the excellent snippet from Frank Kranenburg and available on OpenNTF.

<?xml version=”1.0″ encoding=”UTF-8″ ?>
<xp:view xmlns:xp=”http://www.ibm.com/xsp/core&#8221; xmlns:xe=”http://www.ibm.com/xsp/coreex”&gt;

<!– make sure ‘add rows’ component is hidden –>
<style>
.infiniteScroll {
display: none;
}
</style>

<xp:button value=”Label” id=”button2″ styleClass=”infiniteScroll”>
<xp:eventHandler event=”onclick” submit=”true” refreshMode=”partial” refreshId=”#{javascript:compositeData.repeatId}”>
<xp:this.action>
<![CDATA[#{javascript:var repeater = compositeData.repeatControlId;

var counter = getComponent(repeater).getRowCount();
var numb = compositeData.increment;
var url = compositeData.baseURL;

var scope = compositeData.scopeVarName

var currPersons = viewScope.get(scope);
var morePersons = personsBeanTest.getPersons(url + counter + “&count=” + numb);
var allPersons = currPersons.concat(morePersons);

viewScope.put(scope,allPersons);

}]]>
</xp:this.action>
</xp:eventHandler>
</xp:button>

<!– small script to check if we need to auto-click the ‘add rows’ button –>
<xp:scriptBlock id=”scriptBlock1″>
<xp:this.value>
<![CDATA[$(window).scroll(function(){
if($(window).scrollTop() == $(document).height() – $(window).height()) {
$(“.infiniteScroll”).click();
}
});]]>
</xp:this.value>
</xp:scriptBlock>
</xp:view>

Under the event handler of the button we collect the current array with objects from the viewscope, we make a new call to Domino Access Services with our current position and we join the received next set of objects with the current set and then we write things back to the viewscope.

We then partial refresh the design element (a panel) that contains both the repeat control and the infinite scroll.

I defined some properties for the custom control in case I might re-use it for other views…

infscroll

That is basically it! On my Xpage I included some text to indicate where we are in the view and that there are more documents available:

<xp:text escape=”true” id=”computedField2″><xp:this.value><![CDATA[#{javascript:var vw:NotesView = database.getView(“people”);
var currNums:Integer = getComponent(“rptPersons”).getRowCount();
var totNums:Integer = vw.getAllEntries().getCount().toFixed();

return “Displaying rows ” + currNums + ” out of ” + totNums;
}]]></xp:this.value></xp:text>

Processing JSON data from Domino Access Services with Jackson

Introduction

In order to separate the data model from the business logic you could use Domino Access Services as your default data provider and process the JSON client- or server-side.

In this blog I demonstrate how you can use the Jackson library to process the incoming JSON and bind it to a repeat control.

About Jackson

Jackson is a multi-purpose Java library for processing JSON data format. Jackson aims to be the best possible combination of fast, correct, lightweight, and ergonomic for developers.

Find out more about the library here.

Sample – Fakenames application

In this example we will use the infamous fakenames application from codestore (grab it while it still out there). I have altered the data in my example a bit more so it contains company and job title information.

If you happen to have a script who can fill in the database with more sensible data please drop a line here.

People view

We will use the people view as our data-source  and access it via Domino Access Service. The  URI for the view is something as followed (depending on your installation):

http://server1/fakenames.nsf/api/data/collections/name/people

XPage

We will use and XPage to display the data from the view. The xpage contains a repeater and a couple of fields e.g.:

<?xml version=”1.0″ encoding=”UTF-8″?>
<xp:view
xmlns:xp=”http://www.ibm.com/xsp/core&#8221;
xmlns:xc=”http://www.ibm.com/xsp/custom”&gt;

<xp:panel>
<xp:repeat id=”rptPersons” rows=”10″ var=”persons”
value=”#{javascript:com.quintessens.FakeNames.DASRest.getPersons(‘http://server1/fakenames.nsf/api/data/collections/name/people?count=100&#8242;)}”>
<xp:panel id=”personsPanel”>
<h1>
<xp:text escape=”true” id=”computedField1″
value=”#{javascript:persons.getName()}”
>
</xp:text>
</h1>
<h3>
<xp:text escape=”true” id=”computedField2″
value=”#{javascript:persons.getCompanyname()}”
>
</xp:text>
</h3>
<xp:text escape=”true” id=”computedField3″
value=”#{javascript:persons.getJobtitle()}”
style=”font-style:italic”>
</xp:text>

</xp:panel>
</xp:repeat>
<xp:pager layout=”Previous Group Next”
partialRefresh=”true” id=”pager1″ for=”rptPersons”>
</xp:pager>
</xp:panel>
</xp:view>

Note I call in the repeater control a method getPersons in the class DASRest and provide an URL of the data-source.

I add the count parameter to get more initial results than set in the server configuration.

I also have added a pager control to navigate through the returned collection.

DASRest class

The DASRest class looks as followed:

package com.quintessens.FakeNames;

import javax.ws.rs.core.MediaType;
import org.codehaus.jackson.map.ObjectMapper;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;

import com.quintessens.FakeNames.Person;

public class DASRest {

public static Person[] getPersons(String url) {
Person[] persons = null;
try {
ClientConfig config = new DefaultClientConfig();
Client client = Client.create(config);
WebResource service = client.resource(url);
String json = service.accept(MediaType.APPLICATION_JSON).get(String.class);
ObjectMapper mapper = new ObjectMapper();
persons = mapper.readValue(json, Person[].class);
} catch (Exception e) {
e.printStackTrace();
}
return persons;
}
}

Jersey

This class uses the Jersey library to setup a client to contact the Domino Access Service.

Developing RESTful Web services that seamlessly support exposing your data in a variety of representation media types and abstract away the low-level details of the client-server communication is not an easy task without a good toolkit. In order to simplify development of RESTful Web services and their clients in Java, a standard and portable JAX-RS API has been designed.

The received JSON is then converted into a Java object. I find this a good site to learn more about mapping JSON and Java.

Person class

The class also uses a Person class. In this class we specify which fields we want to map and how they should look like:

package com.quintessens.FakeNames;

import javax.xml.bind.annotation.XmlRootElement;

import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.annotate.JsonProperty;

@XmlRootElement
@JsonIgnoreProperties(ignoreUnknown = true)
public class Person {
private String name;//$17
private String companyName;
private String jobtitle;

@JsonProperty(“$17″)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@JsonProperty(“CompanyName”)
public String getCompanyname() {
return companyName;
}
public void setCompanyname(String companyname) {
this.companyName = companyname;
}
public String getJobtitle() {
return jobtitle;
}
public void setJobtitle(String jobtitle) {
this.jobtitle = jobtitle;
}
}

As you can see @JsonProperty(“$17″) makes the code a bit more user-friendly. In this case it maps the programmatic column name with a variable name.

The result

The following image shows the result of the code above:

jackson

As you see the markup is still basic but you can easily beautify it with Bootstrap or preferred CSS framework of choice.

The purpose of this blog was to demonstrate separating the data model and the business logic. You could have received the same result just using a repeat control and server-side javascript. But since the JSON & Java combination is more hype in the Domino world I guess it is interesting to take a look at the possibilities.

Wrap up

Some thoughts I have after this experiment:

  • What about the other documents?

In my example I make a call to DAS and include the count = 100 parameter. The number 100 is the limit that is set on my server. I have not figured out yet how to load a next set of documents and include it to the existing collection (please drop a note in case you have an answer to this).

  • What about performance?

Is Domino Access Services faster than e.g. defining my own data provider e.g. via a viewnavigator? I don’t know. In case you have suggestions on the preferred or fastest way to provide the data then let me know.

  • What about the language?

Java is not my native language in the Domino world. But the example above is understandable for a lot of us I would think. But who died out of a bit of curiosity?

Thanks for reading. Happy coding!

Presentations from EntwicklerCamp 2014 – Track 4

Track Session Subject Download Presentation
Track4 Session1 The Road to Damascas – LS and @Formula to SSJS http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/ddd7b3baaf49dbadc1257be200295cc1/$FILE/T4S1-Xpages-road%20to%20damascas.pdf
Track4 Session2 Wo speichert Notes was? Und was kann der Entwickler damit anfangen? http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/2071360f70207a00c1257be200295cbf/$FILE/T4S2-Wo%20speichert%20Notes%20was.pdf
Track4 Session3 WebServices unter Notes/Domino http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/0eca636da0020f78c1257be200295cb7/$FILE/T4S3-WebServices.pdf
Track4 Session4 C / C++ Api benutzung in Domino und Notes http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/c7c7068c38e3ce99c1257be200295cb4/$FILE/T4S4-Domino%20C-API.pdf
Track4 Session5 Coffee from a Friend – Using Third Party Java Libraries http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/c9fadb7e1ca4a6d2c1257be200295cb5/$FILE/T4S5-Xpages-coffe%20from%20a%20friend.pdf
Track4 Session6 Notes und die Zeit http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/3b9b4049f4b5a50fc1257ca200413f27/$FILE/T4S6-Notes%20und%20die%20Zeit.pdf
Track4 Session7 Schick mit Grid – DataGrids in XPages http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/0a3a4e6d95ce04c3c1257ca200411c72/$FILE/T4S7-SchickMitGrid.pdf
Track4 Session8 Wo speichert Notes was? Und was kann der Entwickler damit anfangen? http://www.entwicklercamp.de/konferenz/ent2014.nsf/bc36cf8d512621e0c1256f870073e627/59dd26d2f93162f6c1257ca2004120c3/$FILE/T4S8-Wo%20speichert%20Notes%20was.pdf