Dongeng Jawa

Data Lake and Datawarehouse

Java September 13, 2018 Leave a comment

7 years ago I wrote some article about datawarehouse (see https://jokondo.wordpress.com/category/data-warehouse/) . At that time, just few organization talk about data warehouse and data mining.

Nowadays, after the era of big data where the data is super huge is generated people start thinking different way on how the data is being stored and can be used for analytical purposes.

In traditional data warehouse, the data is loaded into RDBMS after the use of it is define. e.g Perhaps the organization use the data warehouse to keep the total goods that has been sold for every city, region, state and country. It captured also the goods type.

Both Data Lake and Data Warehouse have different objectives to be achieved in an enterprise. Some of the key difference are shown here:

Data Lake	Data Warehouse
Captures all types of data and structures, semi-structured and unstructured in their most natural form from source systems	Captures structured information and processes it as it is acquired into a fixed model defined for data warehouse purposes
Possesses enough processing power to process and analyze all kinds of data and have it analyzed for access	Processes structured data into a dimensional or reporting model for advanced reporting and analytics
A Data Lake usually contains more relevant information that has good probability of access and can provide operational needs for an enterprise	A Data Warehouse usually stores and retains data for long term, so that the data can be accessed on demand

Layers in data lake figure

Datalake

Rich Text Editor in Java, JSP

Java, Javascript, JSP December 28, 2016 Leave a comment

Today my friend asking me to implement Rich Text Editor in Java. Their current application is standard Java web application.

Talking to my friend who use to talk using Ruby, he recommends me to use CKEditor. From the forum and the feedback this javascript library, I can say already mature.

They have implement also the taglib for JSP (either make this more complicated or easier is up to developer who uses it).

Since the friend who asks a help already implement in java way for the sake of maintaining purpose.

For anyone who still has doubt on how the Rich Text Editor (RTE) looks like, it is like this

The common use case when the RTE use is when we need to let user has a fancy post (like in Jira) , instead of writing HTML code to draw a table and insert an image. Others use case is for in some web application that required the user admin to create an email template in a fancy way but easier.

So, now you have a solid reason to have the feature on your web application. The steps to implement it as follow.

I assume you use maven base project, and you can add ckeditor taglib library to the project


<!-- WYSWYG lib CK Editor -->
<dependency>
     <groupId>com.ckeditor</groupId>
     <artifactId>ckeditor-java-core</artifactId>
     <version>3.5.3</version>
</dependency>

After the jar is added (either trough maven or manual), download the ckeditor from here http://ckeditor.com/download/releases ( I used ckeditor 3.5.3)

and copy all to your javascript folder (later we use the location in our jsp). In my project will be like this

Once the javascript and all the ckeditor added into the project then we can start add and work on our jsp.

Add this snipped on top of your jsp, so you can start using the taglib


<%@ taglib uri="http://ckeditor.com" prefix="ckeditor" %>

within the form tag, you ckeditor:editor instead of textarea like below

<tr>
<td class="field-label" colspan="2">Void Email Template
<ckeditor:editor basePath="${contextPath}/js" editor="voidTemplate"         value="${settingForm.voidTemplate}" /></td>
</tr>

basePath=”${contextPath}/js is location where the ckeditor javascript located

Start deploying the application, you should be able to use the CK Editor as your RTE.

ESB Dengan Mule II

ESB, Java June 1, 2015 1 Comment

Saya beramsusi kamu mengahui kenapa musti menggunakan ESB, jika belom silahkan baca post sebelumnya di esb-dengan-mule-i.

Jika sudah tahu kenapa dan kapan kita membutuhkan maka mari kita kupas salah satu technology ESB dimulai dari installasi hingga mempeljari kasus per kasus.

Langkah pertama, unduh Anypoint studio (dulu di sebut studio) di http://www.mulesoft.org/ dan install di PC kamu.

Oh ya, sebelum menginstall pastikan kamu sudah menginstall Java JDK dan mengeset JAVA_HOME, minimal java version 7.

Seperti ini penampakan saat anypoint studio, jika kamu terbiasa menggunakan eclipse maka akan jauh lebih mudah, jika tidakpun tidak mengapa 🙂

Langkah selanjutnya adalah menginstall plugin community edition (by default Anypoint hanya memilki runtime untuk Enterprise edition)

Kemudian tambahkan mule studio runtime plugin atau update jika sudah ada

Click tombol next, kamu bisa memilih versi CE yang kamu butuhkan

Jika sudah berhasil, maka kamu bisa memulai membuat project dengan menggunakan Anypoint Community edition seperti ini

Selamat mencoba 🙂

ESB Dengan Mule I

ESB, Java May 31, 2015 1 Comment

Kapan kamu membutuhkan ESB Enterprise Service Bus?

Pertanyaan ini untuk mempermudah kita memahami apa itu ESB.

1. Di saat kamu perlu mengintegrasikan 2 atau lebih aplikasi/sistem.

2. Kamu perlu mengekspose API untuk di gunakan oleh sistem lain yang notabene milik perusahaan lain

3. Berbagai legacy sistem dengan input atau output yang berbagai macam dan input/ouput ini perlu di gabungkan dan ‘berbicara’ antara satu dengan yang lainnya.

Kata kunci dari kebutuhan-kebutuhan di atas adalaha INTEGRASI, API dan MULTI SYSTEM.

Integrasi bisa dalam bentuk yang paling sederhana yaitu pertukaran file hingga dalam bentuk Web Service (ini yang paling umum).

Bisa saja integrasi ini dilakukan dengan mendevelop aplikasi setelah kedua aplikasi sepakat bagaimana integrasi dan formatnya jika (jika itu file). Hanya saja solusi ini tidak praktis, karena setiap ada perubahan, misal penambahan field akan butuh effort yang banyak. Selain itu jika yang di integrasikan lebih banyak aplikasi dan banyak inbound dan outbound (istilah dalam ESB yang mewakili endpoint atau invoker/pemanggill), develop aplikasi sendiri akan sangat tidak mantainable.

ESB menawarkan sebagai solusi untuk integrasi banyak aplikasi dengan mudah, baik aplikasi itu sudah dalam produks (legacy) ataupun jika hendak mengekspose API agar sistem lain bisa ‘komunikasi’ dengan sistem kita.