I have come across requirements where in I am supposed to generate the output in nested Json format.Below is a sample code which helps to do the same.The input to this code is a csv file which contains 3 columns . company name department employee name Example:
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1 2 |
google,jessica,sales google,sita,technology |
We need… Read more »
There would be occasions where in we would also need to know the name of the file that we are processing. We can use wholetextfile() which returns a PairRDD of filename and filecontents. wholetextfile() put whole contents of the file in to a single record, which means if we are… Read more »
There would be instances where in we are given a huge xml which contains smaller xmls and we need to extract the same for further processing.We may not be able to parse such Xmls using TextInputFormat, since it considers every line as a record, but in the xml below, our… Read more »
VTD-XML is a good alternative to Simple API for XML (SAX) and Document Object Model (DOM), as it does not force you to trade processing performance for usability. The Java-based, non-validating VTD – XML parser is faster than DOM and better than SAX.Unlike other XML processing technologies, VTD-XML is designed… Read more »
There would be instances where in we do not have direct access to Database server running in an external network, i.e we cannot open connection to the database directly from our local machine .Usually to access these databases we will have to login to another server(Bastion host) thru putty to… Read more »