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Choosing Between Envoy and NGINX Ingress Controllers for Kubernetes

As Kubernetes has become the standard for deploying containerized applications, ingress controllers play a critical role in managing how external traffic is routed to services within the cluster. Envoy and NGINX are two of the most popular options for ingress controllers, and each has its strengths, weaknesses, and ideal use cases. In this blog, we’ll explore: How both ingress controllers work. A detailed comparison of their features. When to use Envoy vs. NGINX for ingress management. What is an Ingress Controller? An ingress controller is a specialized load balancer that: Manages incoming HTTP/HTTPS traffic. Routes traffic to appropriate services based on rules defined in Kubernetes ingress resources. Provides features like TLS termination, path-based routing, and host-based routing. How Envoy Ingress Controller Works Envoy , initially built by Lyft, is a high-performance, modern service proxy and ingress solution. Here's how it operates in Kubernetes: Ingress Resource : You d...
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Distributed Transactions in Microservices: Implementing the Saga Pattern

Managing distributed transactions is one of the most critical challenges in microservices architecture. Since microservices operate with decentralized data storage, traditional ACID transactions across services are not feasible. The Saga Pattern is a proven solution for ensuring data consistency in such distributed systems. In this blog, we’ll discuss: What is the Saga Pattern? Types of Saga Patterns : Orchestration vs. Choreography How to Choose Between Them Implementing Orchestration-Based Saga with Spring Boot An Approach to Event-Driven Saga with Kafka 1. What is the Saga Pattern? The Saga Pattern breaks a long-running distributed transaction into a series of smaller atomic transactions , each managed by a microservice. If any step fails, compensating actions are performed to roll back the preceding operations. Example: In an e-commerce system , a customer places an order: Payment is processed. Inventory is reserved. Shipping is scheduled. If inventory reservation fails, the paym...

Dynamically Loading YAML Files in Spring Boot with Java

In modern applications, configuration plays a crucial role in maintaining flexibility and modularity. Often, we need to load properties from multiple YAML files, organized across nested directories, to ensure scalability and modular configuration. In this blog, we’ll explore how to dynamically load all YAML files from a specific directory structure and merge their properties into a single configuration object. Use Case Imagine we have a configuration directory like this: src/main/resources ├── application.yml ├── configs │   ├── environment │   │   ├── dev.yml │   │   ├── qa.yml │   ├── features │   │   ├── feature1.yml │   │   ├── feature2.yml We want to load all YAML files under the configs directory (including subdirectories), merge them, and make the properties available for use in our Spring Boot application. Implementation 1. Dynamic YAML Loader We will create a utility class to dy...

Generate Java POJOs from JSON Schemas with jsonschema2pojo

  Steps to Generate POJOs Add Dependency Add the jsonschema2pojo plugin to your pom.xml :   <plugin>     <groupId>org.jsonschema2pojo</groupId>     <artifactId>jsonschema2pojo-maven-plugin</artifactId>     <version>1.1.2</version>     <executions>         <execution>             <goals>                 <goal>generate</goal>             </goals>         </execution>     </executions>     <configuration>         <sourceDirectory>${basedir}/src/main/resources/schemas</sourceDirectory>         <targetPackage>com.example.pojo</targetPackage>     </configuration> </plugin> Prepare JSON Schemas Save your s...

Performance Testing a Spring Boot Application with Gatling

In this blog, we’ll explore using Gatling , a powerful load-testing tool, to test a simple Spring Boot application. We'll set up a performance test for a sample REST API endpoint, demonstrate step-by-step how Gatling integrates with the project, and configure a scenario similar to the example discussed earlier. What is Gatling? Gatling is a highly performant open-source load-testing tool. It helps simulate high-traffic scenarios for your APIs, ensuring your application can handle the expected (or unexpected) load efficiently. 1. Setting Up the Spring Boot Project We'll create a Spring Boot REST API with a simple /search endpoint that accepts query parameters: query and category . @RestController @RequestMapping("/api") public class SearchController {     @GetMapping("/search")     public ResponseEntity<String> search(             @RequestParam String query,             @RequestParam String category)...

Top 10 Flavorful Combinations Using Ajwain, Ginger, Tea, and Black Pepper for a Bold, Invigorating Drink

When it comes to exploring unique flavors, there’s a lot of magic in mixing spices and herbs that are both warming and aromatic. Ajwain (carom seeds), ginger, tea, and black pepper are each powerful in their own right but even better together. Whether you’re looking for a soothing, immunity-boosting drink or a bold experiment in flavor, these combinations bring a range of tastes and benefits. Let’s dive into the top 10 best combinations of these ingredients, ranked for flavor and experience. 1. Ginger + Black Pepper + Tea This is a classic combination, bringing together ginger's warmth, black pepper’s spiciness, and the depth of tea. This drink is not only satisfying but also great for boosting immunity and relieving congestion. How to Make It : Boil sliced ginger and a pinch of black pepper in water. Add tea leaves, simmer for a minute, strain, and serve. Add honey for sweetness if you like. 2. Ajwain + Ginger + Tea Combining the earthy pungency of ajwain with fresh ginger and tea...

Monitoring Spring WebFlux Microservices with New Relic

 In this guide, we’ll go over how to monitor a reactive Spring Boot application using WebFlux, with New Relic’s @Trace annotation for detailed transaction tracking, custom parameters, and distributed tracing for complex service chains. Prerequisites A Spring Boot WebFlux application. The New Relic Java agent configured in your application. Enable distributed tracing in newrelic.yml : distributed_tracing:   enabled: true Step 1: Instrument the Main Endpoint Our main entry point is the processRequest endpoint, which handles validation, external API calls, and data processing. Here’s how we add @Trace with dispatcher = true to make it a main transaction. @RestController public class SampleController {     private static final Logger logger = LoggerFactory.getLogger(SampleController.class);     private final SampleService sampleService;     private final WebClient webClient;     public SampleController(SampleService sampleService, WebClient...