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java-interview-questions-answers

How to build and clear a reference data cache with singleton EJBs, Ehcache and MBeans

In this post I will present how to build a simple reference data cache in Java EE, using singleton EJBs and Ehcache. The cache will reset itself after a given period of time, and can ...
spring-interview-questions-answers

Spring Rest API with Swagger – Exposing documentation

Once you create API documentation it is important to make it available to the stakeholders. In ideal case, this published documentation would be flexible enough to account for any ...
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Using the Neo4j browser with Embedded Neo4j

There are times when you have an application using Neo4j in embedded mode but also need to play around with the graph using the Neo4j web browser. Since the database can be accessed ...
java-interview-questions-answers

Batching (collapsing) requests in Hystrix

Hystrix has an advanced feature of collapsing (or batching) requests. If two or more commands run similar request at the same time, Hystrix can combine them together, run one batched ...
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Apache Camel please explain me what these endpoint options mean

In the upcoming Apache Camel 2.15, we have made Camel smarter. It is now able to act as a teacher and explain to you how its configured and what those options mean. The first lesson ...
java-interview-questions-answers

Java EE 7 / JAX-RS 2.0 – CORS on REST

Java EE REST application usually works well out of the box on a development machine where all server side resources and client side UIs point to “localhost” or 127.0.0.1. But when ...
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Beginner’s Guide to Hazelcast Part 3

This is a continuation of a series of posts on how to use Hazelcast from a beginner’s point of view.  If you haven’t read the last two, I encourage reading them: Beginner’s Guide ...
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Create WildFly OpenShift application using Command Line Tools

A new instance of WildFly can be easily provisioned on OpenShift by using the quick start. Just a single click, and you are ready to go! Generally power users of OpenShift use Command ...
spring-interview-questions-answers

Spring boot based websocket application and capturing http session id

I was involved in a project recently where we needed to capture the http session id for a websocket request – the reason was to determine the number of websocket sessions utilizing ...
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Beginner’s Guide to Hazelcast Part 2

This article continues the series that I have started featuring Hazelcast, a distributed, in-memory database. If one has not read the first post, please click here. Distributed Collections Hazelcast ...
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