2023-06-11 | #creational-patterns #design-patterns #factory-method-pattern
Once upon a time, there was a magical kingdom, and its name was “Factory Method”. This kingdom was a place that controlled the creation of objects. The wisest ruler of the kingdom believed that the creation of objects had its own special ways, and this was part of his rule. The ruler had a princess, and her name was “Creator”. Creator used her magical powers every day to create a new object.
2023-06-11 | #creational-patterns #design-patterns #prototype-pattern
Once upon a time, there was a place called the Land of Creators. In this land, there was a secret to creating new objects quickly and efficiently. This secret was called the “Prototype Pattern”. One day in the Land of Creators, there was a magical drawing pen. This pen had the ability to copy any object it touched. This feature made the creation of objects easy and fast, because instead of creating each object from scratch, an existing object was being copied.
2023-06-11 | #linq #net #optimistic-concurrency
When working with databases, it is of great importance to properly manage concurrent operations and ensure data integrity. Concurrency control is used to manage multiple users or processes accessing the same data concurrently. In this article, we will explore how to ensure data integrity using LINQ (Language Integrated Query) with optimistic concurrency. What is Optimistic Concurrency? Optimistic concurrency is a method where resources are not locked when a transaction begins, but changes are checked before the transaction is completed.
2023-06-11 | #linq #net #pessimistic-concurrency
When working with databases, managing concurrent operations and ensuring data integrity are of great importance. Concurrency control is used to manage multiple users or processes accessing the same data concurrently. In this article, we will explore how to use LINQ (Language Integrated Query) with pessimistic concurrency to maintain data integrity. What is Pessimistic Concurrency? Pessimistic concurrency is based on the principle of locking the relevant data when a transaction begins and maintaining the lock until the transaction is completed.
2023-06-11 | #microservice #orchestration-based-saga #saga-pattern
In another corner of the Land of Computers, in the City of Microservices, there was another world where all microservices moved according to a specific symphony. In this world, all microservices were governed by a single orchestra conductor, and this management model was called “Orchestration-Based Saga.” This resembled a music performance in a grand orchestra. Just as an orchestra conductor tells all musicians when and which notes to play, in this world, the Orchestra Conductor Microservice determined when and how all microservices would move.
2023-06-11 | #choreography-based-saga #microservice #saga-pattern
In another corner of the Land of Computers, in the City of Microservices, there was another world where all microservices moved according to a specific symphony. In this world, all microservices were managed by a single orchestra conductor, and this management model was called “Orchestration-Based Saga.” It was akin to a music performance in a grand orchestra. Just as an orchestra conductor tells all musicians when to play which notes, here the Orchestra Conductor Microservice determined when and how all microservices would move.
2023-04-24
The first book of my series on edgedb that I have started writing is coming soon. To Follow.
2023-04-12 | #edgedb #edgedb-links
Computed Links is a structure used to define relationships between two objects. These links are created by using a defined query or function to calculate the relationship between associated objects. Computed Links is a structure used to define relationships between two objects. These connections are created by using a defined query or function to calculate the relationship between the associated objects. This structure is very useful for ensuring consistency of the data held in the database.
2023-04-12 | #edgedb #edgedb-constraints
The term exclusive constraint in EdgeDB refers to a type of constraint that ensures a specific property is unique or within a certain range. For example, you can create an exclusive constraint in a User object that ensures the email property is unique, thus ensuring that each user is only saved once. In the following example, we are defining an exclusive constraint that ensures uniqueness in the email property: type User { required property id -> uuid; required property name -> str; exclusive constraint unique_email on (.
2023-04-11 | #edgedb #edgedb-constraints
Edgedb is a relational database management system (RDBMS) that provides various constraint mechanisms to securely store and manage your data while preserving the integrity of the data recorded in your database. Constraints are a set of rules used to maintain the integrity of the data stored in your database. There are five different types of constraint: 1. Primary Key Constraints: Primary key constraints ensure that each row is uniquely identified. This constraint specifies that there can only be one primary key column in a table, and each value in this column can only be used once.
