In this article, you are going to learn some of the most commonly used annotations in Quarkus and their purposes:
Quarkus Core Annotations
@ApplicationScoped: Used to annotate a class whose instances are shared across the entire application. It is a type of CDI scope that defines the lifecycle of the annotated bean to be the same as the lifecycle of the application.@Singleton: Used to annotate a class whose instances are shared across the entire application. It is a type of CDI scope that defines the lifecycle of the annotated bean to be the same as the lifecycle of the application.@Inject: Used to annotate a field, constructor parameter, or setter method to indicate that the value of the field or parameter should be injected by CDI.@Produces: Used to annotate a method that produces a bean to be injected by CDI.@ConfigProperty: Used to annotate a field, constructor parameter, or setter method to indicate that its value should be injected from the configuration.
RESTful Web Services Annotations
@Path: Used to annotate a resource class or method to specify the URI path that should be mapped to the resource.@GET: Used to annotate a method to indicate that it should handle HTTP GET requests.@POST: Used to annotate a method to indicate that it should handle HTTP POST requests.@PUT: Used to annotate a method to indicate that it should handle HTTP PUT requests.@DELETE: Used to annotate a method to indicate that it should handle HTTP DELETE requests.@Produces: Used to annotate a method to indicate the media type of the response it produces.
Hibernate Annotations
@Entity: Used to annotate a class to indicate that it is a persistent entity in the database.@Id: Used to annotate a field to indicate that it is the primary key of the entity.@GeneratedValue: Used to annotate a field to specify the strategy used to generate the primary key value.@Column: Used to annotate a field to specify the mapping between the entity attribute and the database column.
Quarkus Messaging Annotations
@Incoming: Used to annotate a method to indicate that it should handle incoming messages from a messaging system.@Outgoing: Used to annotate a method to indicate that it produces outgoing messages to a messaging system.@Channel: Used to annotate a method to indicate the name of the messaging channel.
These are just a few of the most commonly used annotations in Quarkus. There are many more annotations available that provide additional functionality, such as caching, security, and metrics.
I hope this helps, you!!
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