Reactive

Reactive MongoDB with Spring boot

MongoDB has changed a lot over the last few years. I have not used it for more than eight years in production now. I recently need to use MongoDB as a multi-purpose data store. It surprised me a lot with the new features, but I was slightly disappointed with the problems of read and write concerns at default settings.  However, you can set it to a majority or a higher level to achieve casual consistency. In this post we are going to cover how to create a spring boot service, connect to Mongo DB with a reactive driver, and perform...

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Introduction to Micrometer with Springboot

Springboot and Springcloud has made it easier to develop Microservices in the past couple of years and its usage has increased tremendously. Springboot without Micrometer is like riding a Tesla X without the instrument cluster. Alternatively there are plenty of other tools available to instrument your code to collect metrics and some of them supplied by the metrics aggregators, some are provided by APM vendors and then there is a big gamut of open source projects. When we think about it at the enterprise scale questions like below may arise before choosing the right tool. Where should I place my...

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Zuul and Spring Cloud Gateway – Comparison, Benchmarks, LoadTesting

Spring Cloud Gateway and Zuul are different projects from the Spring community aimed to provide a developer-friendly way of writing Gateway services. While a many of the Spring Cloud users aware of the Zuul project, S-C Gateway is relatively framework which Spring Web Flux (Project Reactor) and the new SpringBoot2. You can refer the question which I asked some time ago in StackOverflow for differences. I have been using Netflix’s Zuul for over two years now and I am so far happy with its performance. I am eagerly waiting to see the much-purported Zuul2 which we can expect anytime. But...

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Reactive Springboot with Spring Cloud Vault

In the previous post, we saw how we can create reactive Microservices using Spring-boot and Kotlin. I want to write this as a series of articles to address various cross-cutting concerns when we encounter during the implementation of Microservices architecture. In this post, we will see about securing our Microservices using Spring Cloud Security and storing the credentials of the service and MongoDB in the Hashicorp Vault and then retrieve them using Spring Cloud Vault. In addition to providing a secure means of storing the credential and tokens in the vault, it gives us the advantage of dynamically serving them...

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Developing reactive microservice using Springboot 2

Reactive Spring is based on the project reactor for building non-blocking applications using the spring platform and spring cloud frameworks. Three important interfaces available in Reactor are Publisher, Subscriber, and Processor. Publisher – source of the data Subscriber – One which receives data asynchronously Processor – nothing but a publisher which is also a subscriber (most of the time we won’t need this) Reactor introduces reactive types which implement the Publisher interface namely Flux and Mono. Flux – represents multiple sequences of a result 0…N (many items) which suggests Flux is a standard publisher Mono – As the name suggests,...

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