Connecting the {Dots}

While building applications that comprises of multiple microservices, it is essential to have a mechanism in place to collect and analyze the details of API calls, timing data needed to troubleshoot latency problems and logging error generated from API calls. Jaeger is one such solution and used for monitoring and troubleshooting application built following microservice based architecture with following capabilities: Distributed context propagation Distributed transaction monitoring Root cause analysis Service dependency analysis Performance / latency optimization Jaeger is hosted by the Cloud Native Computing Foundation (CNCF) as the 7th top-level project (graduated in October 2019). Eclipse MicroProfile, OpenTracing and Jaeger As there are multiple tracing solutions out there similar to Jaeger(such as Zipkin), it is really good to avoid vendor lock-in by having some standardization around APIs that work with different providers.The  OpenTracing  addresses this part of the p...

Redis is an open source, in-memory data structure store, used as a database, cache and message broker. In this short post I am sharing a simple application that show cases classic integration of Redis message broker(pub/sub) APIs with a Helidon MicroProfile application for message publish-subscribe use case. You can checkout the source form here:  https://github.com/jobinesh/cloud-native-applications/blob/master/helidon-example-mp-redis/README.md What is the usecase exercised in this example ? It is simple :) We use the a simple greeting REST API  to exercise the Redis Publish Subscribe feature . When a client updates the greeting message, the Greeting resource implementation will publish the new greeting message to Redis channel topic for use by interested parties(consumers) Who does what? Here is quick summary of the classes that you find in the source: Lettuce : This example use  Lettuce  client library to connect to Redis server. If you are new to Let...

This is in continuation of the my previous posts on gRPC CRUD Example with Java. In case you have not read them yet, here are the links - Pause here, take a look at those posts and then resume ;) https://www.jobinesh.com/2020/01/a-simple-grpc-example.html https://www.jobinesh.com/2020/01/a-simple-grpc-crud-example-with-java.html This post shares a simple and complete gRPC CRUD example that runs as Helidon SE microservice.  The gRPC service generated using stdndrad approach as we discussed in previous posts. However the this example runs the gRPC APIs on Helidon SE service ;) If you are interested to see how the Helidon SE embraces gRPC service implementation that we have, see this class:  HelidonSEServer.java  in the example project. As a bonus we can leverage the built-in Helidon SE offerings for monitoring and tracing the gRPC APIs. For instance the following URL gives you health check info for our example: http://localhost:8080/health You can find t...

Recently I posted a very short article on using Kafka along with a Helidon MicroProfile application:  https://www.jobinesh.com/2020/01/using-kafka-with-helidon-microprofile.html . It was using classic Kafka APIs and involved more manual coding. In this post, let us see how to build the same messaging solution declaratively availing the Reactive Messaging offering of MicroProfile  specification. Uhh...Did I say less coding and more fun :) What is MicroProfile Reactive Messaging? The following doc may answer all your questions: https://smallrye.io/smallrye-reactive-messaging/  Another interesting blog post on this topic is here:  https://dzone.com/articles/using-jakarta-eemicroprofile-to-connect-to-apache . We use the same constructs with a Helidon MP application in this example. What is the usecase exercised in this example ? It is simple :) We use the a simple greeting REST API  to exercise the Kafka messaging feature. When a client updates the...

The Apache Kafka has become an industry defacto standard for  all messaging use cases that you may find today for an enterprise application.  In this short post I am sharing a simple application that show cases classic integration of Kafka APIs with a Helidon MicroProfile application. You can checkout the source form here:  https://github.com/jobinesh/cloud-native-applications.git What is the usecase exercised in this example ? It is simple :) We use the a simple greeting REST API  to exercise the Kafka messaging feature. When a client updates the greeting message, the Greeting resource implementation will publish the new greeting message to Kafka topic for use by interested parties(consumers) Who does what? Here is quick summary of the classes that you find in the source: ClassicKafkaMessageConsumer : This class contains the logic for listening to the Kafka topic. This class uses a custom annotation '@Startup' so that it gets instantiated on application st...

You can read this post here .

You can read this post here .