In Java 8 lambda expressions were added to make Java code more concise and readable. Lambda expressions are similar to methods. However, unlike other methods, lambda expressions do not need a name. You can implement a lambda expression right in the body of a method. If you are new to lambda expressions I suggest you […]Continue reading
Why Use Caching? When data stored in some database is requested simultaneously from a large user base, the system can get overwhelmed. This happens because for each request the application has to retrieve the data from the database. As the number of simultaneous requests keeps on increasing, the performance of the system degrades increasing latency. […]Continue reading
Spring Boot REST APIs have different types of clients accessing from different locations. At times, these APIs need to perform tasks to generate and share sensitive data. Now all clients should not get access to such data, but only a privileged set of clients should. In such scenarios, you need to secure your REST API. […]Continue reading
Java SE 12 introduces switch expressions, which like all expressions evaluate to a single value, that you can use as statements. Java 12, brings improvement to the switch statement with new capabilities. Some of the key capabilities are arrow case labels, multiple case statements, and return values. In this post, I’ll explain the new switch […]Continue reading
Introduction In this article, we will look at Spring Framework’s support of immutable property binding. We described Spring external configuration in this article and also provided a more detailed article about the Java bean properties binding. In this article, we will demonstrate constructor binding using the merchant account configuration in this article. Constructor binding enables […]Continue reading
Introduction In this article, we explained why we should externalise our application configuration data. We also provided configuration examples that use various methods supported by Spring Boot. Within these methods was the Java bean properties binding but it was less detailed. Therefore in this article, we are going to give more details about using the […]Continue reading
Introduction Situation Most of our applications are supported by external services such as a database server, an SMS gateway, or services such as PayPal. Such services can exist in more than one environment i.e development and production environments. If we want to connect to the production environment we must pass through the development environment first. […]Continue reading
Java 8 introduced a new date and time API defined inside java.time package. The key date and time classes defined in this package are LocalDateTime, LocalDateTime, and OffsetDateTime. OffsetDateTime represents a date-time with an offset. This class stores all date and time fields, to a precision of nanoseconds, as well as the offset from UTC/Greenwich. […]Continue reading
If you need to quickly create a JPA-based repository layer, Spring Data JPA is the right choice. You define your repository interface by extending one of the Spring Data JPA Repository interfaces. At runtime, Spring Data JPA will create your repository implementations with the common CRUD methods. You can then perform CRUD operations without writing […]Continue reading
Java 8 introduced a new date and time API defined inside java.time package. The key date and time classes defined in this package are LocalDateTime, ZonedDateTime, and OffsetDateTime. OffsetDateTime represents a date-time with an offset. This class stores all date and time fields, to a precision of nanoseconds, as well as the offset from UTC/Greenwich. For […]Continue reading
