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Experimenting Recursion in DataWeave - Fibonacci Series

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  In various programming languages, recursion is a process in which a method or function calls itself to simplify a complicated problem. Understanding recursive solution sometimes become difficult. Let's try to solve a mathematical problem through recursion with a twist by using DataWeave . The Fibonacci series is a generic use case that recursion can solve. This is a very generic question in programming interviews. Photo by Natalya Letunova on Unsplash What is Fibonacci Series? A Fibonacci series is a set of integers starting with 0 followed by 1, and a series continuing with the sum of the preceding two integers in the sequence. For example, F n =0,1,1,2,3,5,8,13,21,34... Mathematically, F 0 =0 F 1 =1 F n =F (n-1) + F (n-2) Now transforming the above logic in the form of a recursive function to find the nth digit in the Fibonacci series. DataWeave Recursive Function: %dw 2.0 output application/json fun fib_r(n)= if...
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DateTime formatting using xp20:format-dateTime ()

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Create Delimited String from XML Nodes and Vice Versa in SOA 12c

A delimited string is a string representation of data separated by a delimiter(e.g. ","). A simple representation of the delimited string will look like. Delimited String Examples Sample-1-- Delimiter as ","        Value1,Value2,Value3   Sample-2-- Delimiter as "|"        Value1|Value2|Value3 If we want to represent the above set of delimited values in the form of an XML document under some root and parent tag. The representation will look like this. XML Example <root xmlns="http://test.com/sample/xml">   <Values>     <value>Value1</value>     <value>Value2</value>     <value>Value3</value>   </Values> </root> Sometimes we may need to convert values coming in delimited string to an xml document or vice versa. Since delimited strin...
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Import and Export MDS artifacts in SOA 12c

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Oracle SOA-MDS (Metadata Store) repository can be used to access artifacts that can be shared among various SOA composites. For example, we have one common schema for a business fault that is consumed by various applications. Instead of having a localized copy of that schema file in each SOA composite, we can have it in a centralized repository (SOA-MDS). Another benefit of using SOA-MDS is that we can change the file at runtime and need not redeploy the complete code. While developing SOA composites, we use SOA design-time repository, later these changes can be synced to the SOA servers. In this article, we will discuss 2 ways to sync the artifacts available in the SOA design-time repository and the SOA servers. Establishing the connection to SOA-MDS in Jdeveloper. Using SOA em console or Fusion Middleware control console. Moving a file between SOA composite to SOA design-time MDS repository Let's assume, we created a businessFault.xsd which wi...
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