In this post, we will go through the scaling options available in the Spring Batch framework. For introduction on how to write a Spring Batch job, you can refer the previous post which provides details on how to read files Read more…
In this post, let’s see how to read files from S3 using spring batch. We will read CSV files as stream without loading the entire data in memory and process each item. For Item writer, we’ll use just the no Read more…
HTTP (HyperText Transfer Protocol),the underlying protocol in the world of web is commonly used for synchronous communications. However there are some use cases which needs the activities to be done in asynchronous way. Message brokers can help to integrate systems Read more…
Stack is an abstract data type. Stack can be implemented using Linked List or Array. It follows LIFO principle (Last In First Out) and supports push(), pop() and peek() operations. Stack operations For this explanation, let’s consider that we implement Read more…
ArrayList is one of the implementation of the List interface. It is internally a resizable-array under the hood. ArrayList is equivalent to Vector but the only difference is it is not synchronized. ArrayList uses Array internally to store the data. Read more…
An Array is a data structure to store elements of same type. Each element can be accessed by index. Hence random access is possible using Array. Arrays can be of any dimensions. Single and two dimensional arrays are commonly used. Read more…
AWS provides an option to take snapshots of the EBS volume. EBS snapshots come handy when we want to recover our EBS volumes from any unforeseen disasters or failures. It would be even nice if you can automate your Amazon Read more…
In this post, I would like to mention one of the feature of oracle database i.e Oracle flashback query. Recently we as a team involved in the activity of bad data correction. One fine day, for some bug in the Read more…
In this post, let’s see the techniques about securing the Spring REST API using OAuth2. We will start by building an Authorization server to generate OAuth2 tokens. Then we will build our REST API which is the resource server. Finally, Read more…
In this post, let’s see how to integrate Spring Boot with Amazon DynamoDB. I have been exploring the option of creating the REST API using Spring Boot backed by DynamoDB. I will share the information that I have learned during Read more…