© 2014 IBM Corporation
SHOW303: Proper Connections Development for Proper Domino Developers
Matt White, London Developer Co-opMark Myers, London Developer Co-op
About Us
Matt White– A Member of the London Developer Co-op
(londc.com) A group of UK based developers – Domino web developer since 1996– XPages developer since 2008– Also…
• Owner at http://xpages101.net • Lead Developer for Elguji Software
- IdeaJam- IQJam
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About Us
Mark Myers– A Member of the London Developer Co-op
(londc.com) A group of UK based developers – Developer from a support background– 12+ years on Domino, 15+ years in IT– Speaker at 4x Lotuspheres, 4x UKLUGs, 1x
ILUG, 1x BLUG
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Software we’re using
IBM Domino® 9.0.1
IBM Domino® Designer 9.0.1
IBM Websphere® Application Server 8.0
IBM DB2® 10.1
MyEclipse® 2014 Blue Edition
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Aim of this session
Surface an XPages application inside Connections
We’re assuming that you are Domino developers and that you know nothing about developing applications for Connections
We’re going to show you three different ways to do this
This is from real world experience
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What is Connections?
Not a single application server
Think a series of WAS applications, a database server and various add-ons.
It is not as simple as Domino development
But, it is not difficult to do. You just need to know the moving parts.
That’s what we’re going to show you today.
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Our Development Environment
IBM Domino 9.0.1 running:– HTTP – obviously as we are running XPages apps– LDAP – our Domino server handles all authentication for IBM Connections– Mail etc – all the usual add on tasks in Domino
IBM Domino Designer 9.0.1
Websphere Application Server– Free download for developers of WAS 8.0 from: http://ibm.co/1dNp4Uw
• We use 8.0 vs 8.5 as Connections 4.0 & 4.5 only runs on 8.0– You’ll also need to get the IBM Installation Manager v1.6.2
MyEclipse Blue Edition– http://www.myeclipseide.com/blue/
Connections 4.5
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Our Connections Development Environment - Connections Connections development is far simpler than connections installation and administration
Minimum of a Windows server with 8Gig of Ram and 30+ gig for a Empty installation
Installations files 14+ gig
https://bitly.com/18Ub03F (1115 slides not including the Domino installation for LDAP)
You CAN get it all working on one box, but it will be slow (fine for development but not really suitable for users)
You can not use a WAS server set up for development as your connections box, all the security needs to be turned on.
You will need a full day to do this!!
Connections settles in to about 10Gig of memory if left alone, so even on an 8Gig box you will need to reboot every so often.
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Our Connections Development Environment
Installing Connections 4.5 Crib sheet– Install Domino and Enable LDAP (or use an existing one)– Install db2 10.1 + Fixes– Install WAS 8.0.0.5 + Fixes– Create Connections DBs (with wizard)– Install TDI– Avoid Cognos ( you will rarely need it for development and it is optional )– Link Domino LDAP with Connections ProfileDB with TDI (using wizard)– Install Connections*– Make a mental note to ask your admin to do it next time
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*Discover at this point that you have misconfigured some minor detail wrong (such as the deployment profile) and spend hours figuring out why and where
The Domino Application
Simple Approvals application
Three forms
Workflow around document status changes send update emails
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What we’re going to show
Three different ways of surfacing the application in Connections:
1) Simple iWidget
2) Static HTML / JavaScript which integrates with an API
3) WAS Application which integrates with an API
Then as a bonus we’ll add some extra functionality– Using the Social Business Toolkit we’ll post from the Domino application into other
Connections tools
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Creating the iWidget
Very little to do, we already have a responsive web design
Bootstrap 3.0 will handle the scaling of the web page
We just need to configure the iWidget and deploy it
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Creating the iWidget
We need to present it to Connections as a Open Social widget
The easiest way of doing this is with a simple domino page which we will call “approvals.xml”
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Installing into Connections
You will need Connections admin rights.
When you log on to connections, click on the “Administration” Link, on the left side bar under “my Page”
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Installing it into Connections
You can Add/Enable/Disable Widgets from here
Click “Add another widget”
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Installing it into Connections
First choose “Open Social Gadget”
Then “Trusted”
– Select “SSO” if you are logging on with your domino credentials and your admin has set SSO up, this will enable your domino security to work seamlessly in a the widget
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Installing it into Connections
Fill in other details (only Title and Address are Mandatory)
Then Save and Enable the widget
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Creating API – Server Settings
We need to enable the PUT and DELETE methods in our website document on the Domino server
Discuss this with your friendly admin– If not allowed, then process PUT and DELETE
using POST and an additional HTTP Header to describe the actual method being used
• Ideally avoid this approach as it is non standard for the rest of the world
We need to create an API
The second and third demos require an API so let’s quickly create one
The API will be a REST JSON service which allows us to read and write data programatically
It’s a simple process, but there a couple of gotchas
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Creating API – Server Settings
We want to allow cross domain Ajax requests as well
From the website document, create a new website rule
Set the following fields:– Type of Rule: HTTP Response Headers– Incoming URL pattern: */api.xsp*– Expires Header: Add Header if application did
not– Custom Headers
• Access-Control-Allow-Origin: *• Access-Control-Allow-Headers: Origin, X-
Requested-With, Content-Type, Accept
Restrict which domains can do this with the Access-Control-Allow-Origin setting
Restart HTTP on your server
Creating API – Java Class
Now we can create the code in Domino Designer
First we’ll create a new Java Class called ApprovalsService
Creating API – Java Class
We’re going to support four methods using three functions:– GET – renderServiceJSONGet– POST – renderServiceJSONUpdate– PUT – renderServiceJSONUpdate– DELETE – renderServiceJSONDelete
URL Format is:– …/mydb.nsf/api.xsp/[UNID]
Creating API – POST / PUT Method
JSON is sent to our service and based upon the method used to send it, we decide whether to update an existing document or create a new document
– POST will try to update an existing document– PUT will insert a new document
We use HTTP response codes to indicate success or any errors– So 200 == Success– 404 == document not found– Etc.– http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
We’ll see how to call the service later on
Creating API – DELETE Method
A simple DELETE request is sent to our service and we can decide what to do with the document.
– We don’t have to delete the document, we can simply move it out of live views
Again we use response codes to indicate success or failure
Creating API – API XPage
Make sure the XPage rendered property is set to false
Then in the afterRenderResponse event call the renderService method in our Java class
Testing the API
We use a Chrome plugin called “Dev HTTP Client”– Free– Download from Chrome Web Store
We need to control the URL, the METHOD, the HTTP HEADERS
We’re going to test– Getting allrequests– Getting myrequests– Reading a document– Updating a document– Creating a document– Deleting a document
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Testing the API - Errors
In this case we are trying to read a document which doesn’t exist so we get an Error 404
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Static HTML App
Now that we have an API, any number of external applications can access our original XPages application
This is not limited to Connections of course– Think Mobile!
We’re going to create a static HTML and JavaScript application which makes use of the API and AJAX to perform some basic functions
The benefit of this is that we can build in error handling– If the Domino server is down then we can display a useful error page for example
We might want to pull data from several different places
The iWidget may be too basic
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Development Process
This is very simple– We’re going to use a text editor!
We’ll also use some frameworks to make things nice and simple– jQuery 2.0.3
• Will handle our Ajax requests etc– Bootstrap 3
• Will be used for our UI– Font Awesome
• Useful for general icons, in this case a spinner
Merge all the files into a folder in the following structure– Root
• CSS• Font• JS
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Static HTML Application
Then we’ll create a single JavaScript document, site.js
The URL will obviously need to be changed to match your environment
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Static HTML Application
Once you have a working static HTML application, we’re going to want to deploy it to Websphere Application Server (WAS)
We recommend using MyEclipse Blue for this rather than Rational Application Developer– It’s cheaper– It’s smaller and faster– It’s much simpler
We need to create two different projects, one which will contain the code (war file) and one which will handle hold and deploy the war file to WAS (ear file)
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What are WAR and EAR files
A .War file (Web application ARchive) is a file used to distribute a collection of JavaServer Pages, Java Servlets, Java classes, XML files, tag libraries, static Web pages (HTML and related files) and other resources that together constitute a Web application.
An .Ear (Enterprise ARchive) is Basically a normal War file wrapped in a configuration wrapper.
The Configuration wrapper of the Ear file contains features that while are very useful and powerful for Websphere applications (adding JDBC connections on install etc etc) are dangerous on connections server remember you are on a shared server and you can not make any assumptions as to what is happening
– After working with multiple Connections administrators, the general opinion is to document the features you require and ask your administrators to manually add them rather than use the Ear file
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Create EAR Project
In MyEclipse, select File -> New -> Enterprise Application Project
Populate the dialog:– Enter Project Name– Make sure Target Runtime is set to
Websphere 8.0
Click Next
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Create EAR Project
In the next page of the wizard make sure to check “Generate application.xml deployment descriptor”
Then click Finish
We end up with an empty project which we can ignore for the moment
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Create Web Project
Still in MyEclipse, create a new Web Project:
In the dialog enter the Project Name
Make sure that you choose to “Add projectto an EAR” and select the EAR projectwe just created
Click Next
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Create Web Project
Take the defaults on the next page of the dialog
Then click Next
In the final dialog window make sure that the“Generate web.xml deployment descriptor” ischecked
Click Finish
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Import HTML into Web Project
In the WebRoot folder of the Web Project we just created, now import the HTML, JavaScript and CSS files we created into the project:
Right click on the WebRoot folder and choose “Import”
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Create approvals.xml file
In the same way that we created an XML for the deployment of the Domino widget, we need to create a similar XML file for this project
Create a new XML file in the WebRoot folder called approvals.xml
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Create approvals.xml file
Insert the following XML and save the file
Obviously adjust the href property to match your environment
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Export EAR
Now that we have our (very simple) web project we want to get it deployed to our test WAS installation to make sure it works
So we need to export an EAR file
Right click on the EAR project and choose Export
Choose “EAR File” from the list
Click Next
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Export EAR
In the dialog choose the destination for the EAR file
Make sure to choose “Optimize for a specific server runtime” and choose Websphere 8.0” from the list
Click Finish
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Test Install WAS Application
We want to make sure that the WAS application works OK
So open your browser
Now we want to open the WAS Admin Console
Choose “New Application” from theApplications menu
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Install WAS Application
We now go through a 5 stage wizard to install the application
First we upload the EAR file we just created
Then click Next
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Install WAS Application
Because this is the simplest possible deployment we can just take the defaults for the next wizard pages
Choose Fast Path
Click Next
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Install WAS Application
The next screen contains the install details with the final option to save the changes to the server
Click “Save”
Now go to the Enterprise Applications list and choose to start the application we just installed:
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Test the WAS Application
Finally we can actually test the WAS application
The URL for the application will be the same server name as your WAS Admin console but port 9080 (if you’ve setup with the defaults)
The application is called Connect14 and we want to open index.html
So in my case http://mattwhite2c8a:9080/Connect14/index.html
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Deploy the WAS Application to Connections
Now we can deploy the app to Connections
This is basically the same as the deployment to Websphere that you have just done for testing but with a few subtle but important differences
A Connections instance already has multiple applications and is nearly always spread over multiple servers/clusters to spread the load, you must be careful your application does not disturb this balance.
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Deploy the WAS Application to Connections
To find out which applications are running on which servers
– Select “Websphere application servers” from the “Servers” left hand menu
– Select the server you want to check from the list presented
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Deploy the WAS Application to Connections
You can now see all the applications running on the server and their startup order
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Deploy the WAS Application to Connections Once you have picked a suitable server (I prefer “InfraCluster” on my development boxes as lots of small applications which
are similar to most of the ones I develop)– Install the application as you have done previously (using “Fast Path”)– Select the server you want to deploy to, click the checkbox for your application and click “Apply”
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Deploy the WAS Application to Connections
You will see that the server name has now been updated
Continue on with the rest of the “fast track” as you have done previously
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Deploy the WAS Application to Connections A gotcha when deploying to multi-server environments is to remember
which ports the chosen server uses.
Return to the Application server config for your chosen server, and click on “Ports”
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Deploy the WAS Application to Connections If you are using the SSL port, remember you will most likely be using
a self certificate on your development box (these are generated for you during the profile creation section of the connections installation)
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The normal HTTP port (80)
The normal HTTPS port (443)
Deploy the WAS Application to Connections
The environment just shown is a default “medium” environment that is configured when Connections is installed
– This is commonly considered the best environment for development as it simulates a production environment but still works on a smaller local machine.
– You may be tempted to select the “small” installation option but it makes for a very slow restart time for any application/server.
The missing element in what we are showing you verses a production Websphere /Connections installation is the IBM High Availability HTTP server on the front end, this is why we are putting port on the front of everything.
– It is invaluable for productions installations but unnecessary for development as it adds an extra layer to deployments (you have to sync web modules between it and Websphere when you deploy a new application) as well as taking up extra resources.
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Deploy the WAS Application to Connections
On a production server the application location decision will be taken by your administrator, but you can provide help and advice
– It is more important to provide suspected load per user than you are used to for Domino, include as much info as you can include processor and disk requirements
On your development environment, you can cripple performance if you overload the wrong server node which can lead to:
– Wasted time as you try to determine performance bottle necks– Incorrect load requirements.– Looking in the wrong logs for debugging (believe me it happens)
If you are running a large application you may not want to share a cluster/server at all and may need a dedicated server/cluster.
If this happens on live you app may be incorrectly blamed for a system wide slowdown
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Native WAS Application which integrates with an API
When you want to go beyond basic Connections integration or when you want to write a full application on the connections platform you WILL end up writing a Websphere Application Server Native App
– Native access to relation databases – Strongly embedded Widgets i.e. homepage– Strategic
We have built in features in Domino as it is an app development platform, – WAS is an Enterprise App server, not a development platform– Connections is Social Enterprise Software, not a development platform
Native Websphere apps have a great deal of power and although security can be tightly controlled it is not as simple to implement as Domino
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Native WAS Application which integrates with an API
For this example we are going to use a native application to pull from the Approvals Domino database, and post it to the Connections stream
– We will do this on a schedule just as we would do with Agent Manager.
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Integrating WAS into your IDE
With Native applications you will first want to build and test them locally on Websphere– Far faster turn around– Live console– Your breakages don’t impact other people.– Logs are much larger on a connections box
This can be done for Connections development unless:– You are after the Connections backend databases and your administrator has restricted
access to them• Administrators can often be persuaded to grant this access on dev boxes
– You are embedding widgets directly into customized Connections pages• the security overrides needed are often more bother than they are worth
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Integrating WAS into your IDE
To add the Websphere server to your environment, in your IDE show the “Servers” View
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Integrating WAS into your IDE
Navigate to Websphere 8.0
Select the Websphere Home directory– This will be the “AppServer” directory in
where ever you installed Websphere too e.g. “D:\IBM\Websphere\AppServer”*
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*This is the Websphere data directory so should not be installed on a system drive. Also avoid spaces in directories (WAS installer defaults to “C:\Program files”)
Integrating WAS into your IDE
Select “Load Profiles” to show the profiles on the server, think of profiles the same way as Domino partitions.
Profiles each have their own HTTP port and admin port
– the HTTP port will not default to port 80
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Integrating WAS into your IDE
You now have an entry in the server list for each profile,
– You can Start/Stop and deploy your applications to this profile directly within the IDE
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Integrating WAS into your IDE
You can also see the live console (SystemOut.log)– this is stored in the \IBM\Websphere\AppServer\profiles\<ProfileName>\logs\server1
directory
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Native WAS Application which integrates with an API
Our native app will consist of the following actions
Getting Environment variables (for service connections)
Fetching our REST data (from Domino)
Posting it to the Connections Activity Stream
Schedule these updates (like Agent Manager)
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Native WAS Application which integrates with an API
WARNING: Teacher Moment
The will ALLWAYS be a better Way in Java, either a new tool or something you don’t know about.
Our examples use the most exposed fashion way we can thing of, so you can see what's going on
In real life you will use the best tools to make your job simpler.
Up till now IBM will have provided you with most of the tools you need
With J2EE unless you pick a full featured framework eg. SPRING (http://spring.io/) , Vaadin (https://vaadin.com/home) you will have to pick your own ‘best of breed’ tools.
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Native WAS Application - Starting
First Build a new Ear and Web Project as per the previous Example
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Note: We will be applying Jar libraries manually, in this example, in real life you would want to be using maven (http://maven.apache.org/)
Native WAS Application - Getting environment variables
In Domino we take getCurrentDatabase() for granted.
Most other systems require a database connection which its self requires parameters
We want to be able to set these parameters with NO HARDCODING
Thankfully Websphere allows application specific variables
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Native WAS Application - Getting environment variables
These are stored in the application “Deployment descriptor” or web.xml
This is a XML configuration file that is used to store artifacts that are used in a Java application.
It controls many functions for your applications including
Servlets and URL Paths
The Welcome File List
Error Handlers
Recourses
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Native WAS Application - Getting environment variables
First add the variables to the Web.xml including default values
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<env-entry>
<env-entry-name>RESTusername</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>restadmin</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>RESTpassword</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>password123</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>RESTurl</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>http://development/ibmconnect/approvals.nsf/api.xsp</env-entry-value>
</env-entry>
Native WAS Application - Getting environment variables
On a deployed application you can see and edit the Environment variables from the properties of deployed applications
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Native WAS Application - Getting environment variables
This can enable your admin to keep production passwords away from developers or simply not hardcode things
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Native WAS Application - Getting environment variables
There are multiple ways to access the variables, we are just doing to use the simplest, which is to pick them up off the “initialContext”
Ensure that you use the full name so “Java:/comp/env” + the name you gave them
A more advanced way is with the @Resource annotation
See http://en.wikipedia.org/wiki/Java_annotation & http://docs.oracle.com/javase/tutorial/java/annotations/basics.html for annotations background
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initCtx = new InitialContext();
String rESTurl = (String) initCtx.lookup("java:comp/env/RESTurl");
Native WAS Application - Fetching Domino Data
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Now that we don’t have to hardcode variables we can go get the Data from the Domino API we have written previously.
Go to https://code.google.com/p/google-gson/ ,download the “google-gson-2.2.4-release.zip”, and extract it
Native WAS Application - Fetching Domino Data
Select the “Lib” directory in “WEB-INF”, right click and select “Import” “File System”
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Native WAS Application - Fetching Dominio Data
We are going to fetch the JSON Data from Domino and parse it into a Java class so that it is easy to work with
As we can’t be bothered to manually convert the JSON data to a POJO* we will use http://www.jsonschema2pojo.org/
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*Plain Old Java Object
Native WAS Application - Fetching Dominio Data
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Select “JSON” and use some of the data from the testing with the DEV HTTP Client
Selecting the Lowest common Denominator here
Native WAS Application - Fetching Domino Data
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As we are going to use this class for converting from JSON add “@XmlRootElement” just above the class name
Native WAS Application - Posting to Connections
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Now that we have a List of Request Objects, lets send some of their details to the Connections Activity Stream.
Go to http://abdera.apache.org/ ,download the zip, and extract it
Get the Main Jar
Native WAS Application - Posting to Connections
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Lots and lots of supporting Jar files.
You don’t need them all depending which of the Abdera functions you use.
This is also a perfect example of what can lead to “jar hell”.
Note: Once you happy with ATOM in general and are only doing Integration with connections, switch to the Social Business Toolkit (https://www.ibmdw.net/social)
Native WAS Application - Posting to Connections
Select the “lib” directory in “WEB-INF”, right click and select “Import” “File System”
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Native WAS Application - Posting to Connections
Find and select the Abdera Jar and import it
Repeat the process for the supporting Jar files in the lib folder
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Native WAS Application - Posting to Connections
Jar files added to this project are automatically on the build path i.e.
Go to the Project Properties
Select “Java Build Path”, go to the “libraries”
You can see the files are already on the build path
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Native WAS Application - Posting to Connections
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First let’s write a function that can take one of the Request objects we have converted our Domino JSON data to and send it to Connections
Native WAS Application - Posting to Connections
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Now let’s write some code to hold it all together
Native WAS Application - Posting to Connections
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That’s all well and good but how are these functions called in the first place?
What we really need is something like Domino Agent Manager but for a Websphere app
Native WAS Application - Scheduled Updates
Go to http://quartz-scheduler.org/ ,download the Jars, and extract them
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Native WAS Application - Scheduled Updates
Select the “Lib” directory in “WEB-INF”, right click and select “Import” “File System”
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Native WAS Application - Scheduled Updates
Quartz uses an Event Listener
http://docs.oracle.com/cd/E15051_01/wls/docs103/webapp/app_events.html#wp178122
We have to add that listener to the Web.xml file
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Native WAS Application - Scheduled Updates
Quartz Listener and Basic Parameters for Web.xml
Which gives things like the location of the Quartz properties file
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<context-param>
<param-name>quartz:config-file</param-name>
<param-value>/quartz.properties</param-value>
</context-param>
<context-param>
<param-name>quartz:shutdown-on-unload</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>quartz:wait-on-shutdown</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>quartz:start-scheduler-on-load</param-name>
<param-value>true</param-value>
</context-param>
<listener>
<listener-class>
org.quartz.ee.servlet.QuartzInitializerListener
</listener-class>
</listener>
Native WAS Application - Scheduled Updates
Next we will create the quartz.properties file in the “WebRoot” “WEB-INF” “classes”
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Native WAS Application - Scheduled Updates Now we want a servlet for the quartz scheduler “agent
manager” to run in.
Open up the web.xml file and add the configuration for a servlet
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Native WAS Application - Scheduled Updates
Add the following to the WEB.XML
The “<load-on-startup>2</load-on-startup>” means that this servlet starts when the application starts and triggers the class “init”
You can see the class name that we need to create next in the “<servlet-class>” parameter.
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<servlet>
<servlet-name>QuartzInitializer</servlet-name>
<servlet-class>
com.connect2014.ScheduledAgentStarter
</servlet-class>
<init-param>
<param-name>shutdown-on-unload</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
Native WAS Application - Scheduled Updates
That’s the equivalent to “Agent Manager” set up, now lets do a “Scheduled Agent”, a chunk of code that will start when the web app starts.
First let’s build our base agent by creating a new Class and getting the default quartzScheduler
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Native WAS Application - Scheduled Updates
As you can see the class we created on the last slide extends “HttpServlet” and contains “init”
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That means that when the servlet we added to the web.xml starts (when the application starts), it will run the “init” and we can start scheduling
Native WAS Application - Scheduled Updates
Inside the init function of your schedule we now define:
1)A new job (linked to our Class)
2)A schedule
3)Link the Job and schedule together
4)Trigger the scheduler i.e. “load Agent manager”
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1
2
3
4
Native WAS Application - Scheduled Updates
– While we are here this is a Crontrigger
• http://quartz-scheduler.org/documentation/quartz-2.2.x/tutorials/tutorial-lesson-06
– Very very powerful, but sometimes overly complex
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• If you need a simpler version, check out “Simple Triggers”
• http://quartz-scheduler.org/documentation/quartz-2.2.x/tutorials/tutorial-lesson-05
Native WAS Application - Scheduled Updates
Also we need to send all the environmental parameters we built before, into the new “Job” we have just created
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Native WAS Application - Scheduled Updates
To enable our existing class to be used as a Job, is has to have “implements Job”
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And it must possess the “execute” method
Native WAS Application - Scheduled Updates
Finally we can now add the code we wrote before to this function as well as pickup all the variables
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Native WAS Application – Build and Deploy Application
Build the Ear file and deploy the application as per previous native application example
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Native WAS Application
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Once the Application Starts, it pumps entries to the Actor user’s* activity stream from the domino rest service
*(the one who's credentials are supplied)
Recommendations and Further Reading
As already mentioned neither Connections nor its host, Websphere, are application development platforms in the way Domino is.
– You will need to bring your own toolbox of libraries and toolkits to perform many of the functions that you have taken for granted with Domino
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Further reading
When you need: Agent Manager
We Recommend: Quartz (http://quartz-scheduler.org/)
Alternative: java.util.Timer– Simpler but not as powerful– Example: http://www.mkyong.com/java/jdk-timer-scheduler-example/
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Further reading
When you need: To connect to a Relational Databases (such as the Native Connections Dbs)
We Recommend: Hibernate using JPA
When we moved from Domino to Connections we went from the easy going world of NOSQL and constantly being in a database context to Relational databases and defining our own contexts (most likely DB2)
There are lots of fighting over if you should use a ORM (Object-relational mapping) framework such as JPA or direct SQL, but frankly, its quick, reliable and does not give you grief
See Slide deck on SHOW104
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Further reading
When you need: Make your data accessible as Json
We Recommend: gson https://code.google.com/p/google-gson
Alternatives: Jboss Resteasy (http://www.jboss.org/resteasy) & Jersey (https://jersey.java.net)
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Further reading – ATOM (Connections feeds)
When you need: Talk to Connections (ATOM)
We Recommend: Abdera (http://abdera.apache.org/)
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Further reading - Email
When you need: Send an Email
We Recommend: https://javamail.java.net/nonav/docs/api/
Get the SMTP server details off your admin as they will already be setup for connections (it was in the notifications part of the Connections setup)
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Further reading - Email
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Properties props = new Properties();
props.put("mail.smtp.host", "my-mail-server");
Session session = Session.getInstance(props, null);
try {
MimeMessage msg = new MimeMessage(session);
msg.setFrom(“[email protected]");
msg.setRecipients(Message.RecipientType.TO, "[email protected]");
msg.setSubject("JavaMail hello world example");
msg.setSentDate(new Date());
msg.setText("Hello, world!\n");
Transport.send(msg, “[email protected]", "password");
} catch (MessagingException mex) {
System.out.println("send failed, exception: " + mex);
}
Further reading – Homework
If you think you have a handle on all of this, your next stops to be a “Proper” Java Developer are
– Maven build management (http://maven.apache.org/)– Source Control - Git/Github (http://git-scm.com/ &
https://github.com/)– Continuous integration - Jenkins (http://jenkins-ci.org/)– A Web framework (Spring http://spring.io/ , Grails,
Vaadin https://vaadin.com/ , GWT, Wicket, Play, Struts and JSF)
– Spring Annotations to make use of modern Java and reduce the amount of code you have to write
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Access Connect Online to complete your session surveys using any:– Web or mobile browser – Connect Online kiosk onsite
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Acknowledgements and Disclaimers
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