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Showing posts with the label Design Pattern

Observability Done Right: Best Practices and Anti-Patterns for Effective System Monitoring

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  WHAT Observability is a concept that refers to the ability to gain insights into the behavior and performance of complex systems. In the context of software engineering, observability involves the collection, analysis, and visualization of data from software applications, infrastructure, and other components of a system. In the animal kingdom, observability plays a critical role in survival, allowing animals to monitor their surroundings, detect threats, and find food. Dolphins use echolocation to observe their surroundings. They emit high-frequency sounds that bounce off objects, allowing them to create a 3D map of their environment. Thanks for reading Knowledge Cafe! Subscribe for free to receive new posts and support my work. Subscribed WHY In today's era, architectures are becoming increasingly large, complex, and fast-paced due to the faster development and deployment of software by distributed teams with the help of DevOps, continuous delivery, and agile development methodo...
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Unlocking the Potential of Your Web Application with a CDN

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  What is CDN A Content Delivery Network (CDN) plays an important role in application scaling by helping to distribute the load of an application across multiple servers in different geographic locations. This can help to improve the performance and availability of the application for users around the world. When a user requests a piece of content, the CDN will redirect the request to the server that is closest to the user, reducing the latency and improving the overall user experience. This is particularly important for applications that serve a large number of users or handle a high volume of traffic, as it can help to prevent any single server from becoming overwhelmed and causing the application to become unavailable. Additionally, CDN also helps to reduce the load on the origin server by caching frequently-requested content on the CDN’s edge servers. This can help to prevent the origin server from becoming a bottleneck and ensure that it is able to handle the traffic and reque...
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The Importance of Load Balancing in Building Scalable Applications

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                                     What is Load balancer? In the context of application auto scaling, a load balancer is used to distribute incoming traffic to multiple instances of an application. As the traffic to the application increases, more instances of the application are automatically spawned to handle the additional load, and the load balancer automatically directs traffic to these new instances. Conversely, as traffic decreases, instances that are no longer needed are terminated, and the load balancer stops directing traffic to them. This allows the system to automatically scale up or down based on network traffic. Client side Load balancing Client-side load balancing is a technique where the client is responsible for distributing incoming requests to different servers. This is typically done by the client using a load balancing algorithm to select the server to whi...
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Inheritance versus Composition

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The two most common techniques for reusing functionality in object-oriented systems are class inheritance and object composition. Class inheritance lets you define the implementation of one class in terms of another's. Reuse by subclassing is often referred to as white-box reuse. The term "whitebox" refers to visibility: With inheritance, the internals of parent classes are often visible to subclasses. Object composition is an alternative to class inheritance. Here, new functionality is obtained by assembling or composing objects to get functionality that is more complex. Object composition requires that the objects being composed have well-defined interfaces. This style of reuse is called black-box reuse, because no internal details of objects are visible. Objects appear only as "black boxes." Inheritance and composition each have their advantages and disadvantages. Class inheritance is defined statically at compile-time and is straightforward to use, since it ...
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Java Singleton Design Pattern

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1.1. Overview A singleton in Java is a class for which only one instance can be created provides a global point of access this instance. The singleton pattern describe how this can be archived. Singletons are useful to provide a unique source of data or functionality to other Java Objects. For example you may use a singleton to access your data model from within your application or to define logger which the rest of the application can use. 1.2. Code Example The possible implementation of Java depends on the version of Java you are using. As of Java 6 you can singletons with a single-element enum type. This way is currently the best way to implement a singleton in Java 1.6 or later according to tht book ""Effective Java from Joshua Bloch. package mypackage; public enum MyEnumSingleton { INSTANCE; // other useful methods here }   Before Java 1.6 a class which should be a singleton can be defined like the following. public class Singleton { private static Singleton uniqIn...
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