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Standard Groovy codebase contains a @Grab annotation so that dependencies on third-party libraries can be declared. Using @Grab annotation, Grape Dependency Manager downloads jar in similar fashion as that of Maven/Gradle without any build tool. Spring Boot attempts to deduce the required libraries based on code. For example, use of @RestController tells that “Tomcat” and “Spring MVC” libraries are to be grabbed.
Grab Hints
Following table details the hints that Spring Boot uses to download third party libraries −
| Sr.No. | Hint & Dependency to Download/Link |
|---|---|
| 1 |
JdbcTemplate, NamedParameterJdbcTemplate, DataSource JDBC Application |
| 2 |
@EnableJms JMS Application |
| 3 |
@EnableCaching Caching abstraction |
| 4 |
@Test JUnit |
| 5 |
@EnableRabbit RabbitMQ |
| 6 |
@EnableReactor Project Reactor |
| 7 |
extends Specification Spock test |
| 8 |
@EnableBatchProcessing Spring Batch |
| 9 |
@MessageEndpoint, @EnableIntegrationPatterns Spring Integration |
| 10 |
@EnableDeviceResolver Spring Mobile |
| 11 |
@Controller, @RestController, @EnableWebMvc Spring MVC + Embedded Tomcat |
| 12 |
@EnableWebSecurity Spring Security |
| 13 |
@EnableTransactionManagement Spring Transaction Management |
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