Articles Tagged ‘client’

Implementing Reactive Client-Server Communication over TCP or Websockets with RSocket and Java

Sunday, November 25th, 2018

Reactive design or reactive architecture has an impact on how modern software systems are implemented. RSocket is a project that aims to adapt the benefits of the patterns described in the Reactive Manifesto and resulting tools like Reactive Streams or Reactive Extensions  to a formal new communication protocol.

RSocket works with TCP, WebSockets and Aeron transport layers and offers additional features like session resumption.

In the following tutorial I’m going to demonstrate how to implement simple client-server communication over TCP and Websockets for different interaction models like request-response, request-stream, fire-and-forget and event subscription.

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Creating REST Clients for JAX-RS based Webservices with Netflix Feign

Thursday, October 22nd, 2015

For us developers there plenty of libraries exist helping us in deriving and generating clients for existing RESTful web-services and I have already covered some of the in this blog (e.g. the JAX-RS Client API). Nevertheless, I’d like to share my experience with another interesting lightweight library here: Netflix Feign.

Feign offers a nice fluent-builder API, a rich integration for  common libraries and APIs like JAX-RS, Jackson, GSON, SAX, JAX-B, OkHttp, Ribbon, Hystrix, SLF4J and more and last bot not least, it is setup easy and the service contracts are specified using interfaces and annotations.

In the following tutorial I’d like to demonstrate how to derive a service binding from a simple, JAX-RS based RESTful web-service, how to create the service adapter using the integrated builder and at last, performing CRUD operations.

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Creating different Websocket Chat Clients in Java

Sunday, November 9th, 2014

Having written two articles about different websocket based chat server implementations in Java, I was recently asked how an implementation of the client side would look like in Java.

That’s why I added this article to demonstrate how to create a websocket chat client applications within a few steps with the Java API for Websocket.

In the following tutorial, we’re going to write a text-based chat client for the console first and afterwards we’re going to program a chat client with a graphical user interface, implemented in JavaFX.

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Creating a Chat Application using Java EE 7, Websockets and GlassFish 4

Tuesday, August 13th, 2013

Java EE 7 is out now and so I was curious to play around with the new specifications and APIs from in this technology stack.

That’s why I didn’t hesitate to add yet another websocket-chat tutorial to the existing ones on the internet in favour of gathering some experience with this technology and a possible integration using a GlassFish 4 server, the new Java API for JSON Processing for data serialization combined with custom websocket encoders/decoders and finally adding some Bootstrap and jQuery on the client side.

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