1659928800
In this tutorial, you'll learn how to build a simple Event-Driven Microservices with Spring Boot and Apache Kafka.
Basically, you will learn how to use Apache Kafka as a message broker for Asynchronous communication between multiple microservices.
Event-driven architecture (EDA) is a software design pattern in which decoupled applications can asynchronously publish and subscribe to events via an event broker/message broker.
Course content: 15 Lectures:
1 - Course Overview [00:00]
2 - What is Event Driven Architecture? [02:49]
3 - How Event-Driven Architecture Works and Its Advantages [06:40]
4 - Install and Setup Apache Kafka on Mac and Windows [11:44]
5 - Create 4 Microservices [34:47]
6 - Import and Setup 4 Microservices in IntelliJ IDEA [40:26]
7 - Create Order and OrderEvent DTO Classes in Base-Domains [47:23]
8 - Configure Kafka Producer in OrderService Microservice [50:40]
9 - Configure Kafka Topic in OrderService Microservice [57:48]
10 - Create Kafka Producer in OrderService Microservice [01:01:46]
11 - Create REST API and Test Kafka Producer in OrderService Microservice [01:09:22]
12 - Configure Kafka Consumer in StockService Microservice [01:16:30]
13 - Create Kafka Consumer in StockService Microservice [01:24:34]
14 - Configure and Create Kafka Consumer in EmailService Microservice [01:36:10]
15 - Run 3 Microservices Together and Have a Demo [01:40:43]
Blog post and source code at https://www.javaguides.net/2022/07/event-driven-microservices-using-spring-boot-and-apache-kafka.html
#microservices #springboot #kafka
1659759512
Probably the most popular advice to improve the design of your code is DRY - Don’t Repeat Yourself. It is good advice, a good general guideline even, but it is not always the best answer. This is particularly true in Microservices, where DRY can result in too much coupling between services. So when should you aim for DRY software, and when not? What is microservice that means that DRY is a problem? What are good guidelines for DRY in different parts of your system?
In this episode, Dave Farley of Continuous Delivery explores DRY, Coupling and Microservices and how they interact. Dave takes a pragmatic software engineering approach to exploring the pros and cons of DRY on different scales and describes why the microservices example may be more complicated than it looks.
#microservices
1659181020
There are three microservices:order-service
- it sends Order
events to the Kafka topic and orchestrates the process of a distributed transactionpayment-service
- it performs local transaction on the customer account basing on the Order
pricestock-service
- it performs local transaction on the store basing on number of products in the Order
Here's the diagram with our architecture:
(1) order-service
send a new Order
-> status == NEW
(2) payment-service
and stock-service
receive Order
and handle it by performing a local transaction on the data
(3) payment-service
and stock-service
send a reponse Order
-> status == ACCEPT
or status == REJECT
(4) order-service
process incoming stream of orders from payment-service
and stock-service
, join them by Order
id and sends Order with a new status -> status == CONFIRMATION
or status == ROLLBACK
or status == REJECTED
(5) payment-service
and stock-service
receive Order
with a final status and "commit" or "rollback" a local transaction make before
This repository is used as the example for the following articles:
KStream
and KTable
. You need to switch to the streams-full branch.Download details:
Author: piomin
Source code: https://github.com/piomin/sample-spring-kafka-microservices?
License:
#spring #java #springboot #kafka #microservices
1659151260
SpringBoot Micro Services, Discovery Server, Discovery Client, API-Gateway (Load-Balancing), Circuit Breaker
Eureka Discovery Server
The RESTful UI App
Service1 - URI
http://localhost:8001/service1/message
Service2 - URI
http://localhost:8002/service2/message
Load Balanced (API - Gateway)
http://localhost:8003/service1/message
http://localhost:8003/service2/message
Circuit Breaker
Download details:
Author:
Source code:
License:
#spring #java #springboot #microservices
1659080040
Spin up the development environment through:
docker-compose up -d
Start the project through starting all the defined microservices (starting with config-server)
POST http://localhost:8080/command/create
Request Body:
{
"ref": "string",
"name": "string",
"description": "string",
"price": "number",
"quantity": "integer"
}
POST http://localhost:8080/command/buy/<product-ref>
POST http://localhost:8080/query/
GET http://localhost:8080/command/refill/<product-ref>?quantity=<quantity>
GET http://localhost:8080/query/<product-ref>
DELETE localhost:8080/query/purge
DELETE localhost:8080/command/purge
Github repository containing the microservices configuration.
Download details:
Author: AyariAhmed
Source code: https://github.com/AyariAhmed/springboot-microservices-cqrs-event-sourcing
License:
#spring #java #springboot #microservices
1659042840
This application was written by Andrew Aslakson
Built to run on minikube using kubernetes
General race tracking system?
Secure with Firebase Authentication?
Build React app too? - realistically probably just postman.
Download details:
Author: andrewaslakson1
Source code: https://github.com/andrewaslakson1/UserService
License:
#spring #java #springboot #prometheus #microservices
1658394365
Build powerful distributed applications with Dapr and .NET. Learn how to build .NET Microservices applications with Dapr. Create robust microservices solutions that run on-premises or in any cloud
There are so many different concerns that developers and architects have to tackle when building reliable distributed applications, including failure recovery, state management, service discoverability, and service to service communication.
By adopting Dapr, you can quickly solve those concerns and create robust microservices solutions that run on-premises or in any cloud. After attending this session, you will be able to describe Dapr's immediate and practical benefits for building great .NET microservices applications.
#dotnet #dapr #microservices #cloud
1656931178
Hi Guys! In this tutorial, we will learn how to set up a Microservices System on Kubernetes. In part one we are going to talk about how to write a configuration file for each component of the microservice system.
#devops #kubernetes #microservices
https://medium.com/@hmquan08011996/set-up-microservice-on-kubernetes-write-config-file-8df7c2b07a4c
1656919170
Spin is a framework for building and running event-driven microservice applications with WebAssembly (Wasm) components. With Spin, we’re trying to make it easier to get started with using WebAssembly on the server so that we can all take advantage of the security, portability, and speed WebAssembly provides when it comes to running microservices.
spin.toml
) file which defines where your WebAssembly components live and what triggers them.Spin executes the component(s) as a result of events being generated by the trigger(s) defined in the spin.toml
file.
The following illustrates how to define an HTTP application.
This hello_world
function written in Rust defines a component that takes a Request
and returns a Result<Response>
.
#[http_component]
fn hello_world(_req: Request) -> Result<Response> {
Ok(http::Response::builder()
.status(200)
.body(Some("Hello, Fermyon!".into()))?)
}
Once the code is compiled to a WebAssembly component, it can be referenced in a spin.toml
file to create an HTTP application like below.
spin_version = "1"
name = "spin-hello-world"
trigger = { type = "http", base = "/" }
version = "1.0.0"
[[component]]
id = "hello"
source = "<path to compiled Wasm module>"
[component.trigger]
route = "/hello"
Running this application with the spin
CLI is as simple as using the spin up
command. Because a trigger type of http
is specified in the spin.toml
, spin up
will start a web server:
$ spin up
Serving HTTP on address http://127.0.0.1:3000
Available Routes:
hello: http://127.0.0.1:3000/hello
Any time a request is made on the /hello
route, it will invoke the hello_world
function. Adding another component is as simple as adding another [[component]]
stanza to the spin.toml
file.
Original article source at https://spin.fermyon.dev/
#spin #webapp #microservices #webassembly #wasm
1656404845
In this video, we learn how to deploy Node.js Microservices to AWS using EKS & Helm, the package manager for Kubernetes.
Timestamps
00:00:00 Introduction
00:00:32 Setup Helm
00:14:55 Add Charts
00:26:18 Using EKS
00:33:30 Load Balancer Controller
00:37:30 Install & Test
Github Repo: https://github.com/mguay22/nestjs-rabbitmq-microservices/tree/eks
Helm Installation: https://helm.sh/docs/intro/install/
Kubernetes Deployments: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
Kubernetes Secrets: https://kubernetes.io/docs/concepts/configuration/secret/#use-case-as-container-environment-variables
AWS CLI: https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html
AWS Load Balancer Controller: https://kubernetes-sigs.github.io/aws-load-balancer-controller/v2.4/
Eksctl: https://docs.aws.amazon.com/eks/latest/userguide/eksctl.html
1656137970
Annotations In Java
How to create Custom Annotations In Java?
https://javatechonline.com/annotations-in-java/
#java #javaprogramming #javaprogramminglanguage #javadeveloper #javadevelopment #javadevelopers #javadeveloperjobs #javabackend #javabackenddeveloper #javafullstack #javafullstackdeveloper #javadeveloper #javaprogrammer #javatraining #javaee #j2ee #j2eedeveloper #java8 #microservices #microservicesarchitecture #microservice #microservicios #mvcframework #mvc #collections #sorting #java8 #javacode #spring #springframework #javaspring #javaspringboot #springmvc #springboot #interviewquestions #interviewpreparation #interview #annotation
1655984196
How To Write Spring Boot Application Properties Files?
#java #Java #microservices #microservice #spring-boot #spring
https://javatechonline.com/spring-boot-application-properties/
1655983993
How To Implement Spring Cloud Config Server In Microservices?
#java #Java #spring #spring-boot #microservices #microservice
https://javatechonline.com/how-to-implement-spring-cloud-config-server-in-microservices/
1655983701
How To Implement Spring Cloud Gateway In Microservices?
https://javatechonline.com/how-to-implement-spring-cloud-gateway-in-microservices/
#java #microservices #Java #spring-boot #spring-framework #spring
1655969735
Thomas is a senior software engineer specialized in building modern, cloud native, robust, and secure enterprise applications and author of Cloud Native Spring in Action, published by Manning.
The Spring ecosystem provides you with all you need to build cloud native applications, focusing on productivity, simplicity and speed. It’s ready to leverage cloud environment features and integrates with Kubernetes natively.
In this session, Thomas will cover common patterns and best practices to build cloud native applications using Reactive Spring, which provides better performance, resilience, and efficiency. You’ll then see how to containerize them, configure them through the natively supported ConfigMaps and Secrets, and deploy them to a Kubernetes cluster. Finally, he’ll show how to use Spring Native to build GraalVM native executables.
TIMECODES
00:00 Intro
00:53 Cloud native
03:00 Demo
15:03 Cloud native development
16:08 Containerization
19:50 Demo
23:04 Spring Boot on Kubernetes
23:59 Demo
29:07 Externalized configuration
31:24 Demo
36:21 Health probes
37:54 Demo
46:00 Spring Native
49:51 Demo
54:12 Conclusion
54:50 Outro
#springboot #kubernetes #k8s #cloudnative #cloud #microservices