in Java, users in Kotlin is strongly typed, but Kotlin’s clever type inference allows for shorter syntax. 1.3. Null-safety One of Kotlin’s key features is null-safety, which cleanly deals with null values registerBean() registerBean() } In order to allow a more declarative approach and cleaner syntax, Spring Framework provides a Kotlin bean definition DSL It declares an ApplicationContextInitializer can customize existing code (such as Spring Boot actuators or @LocalServerPort) that uses the ${…} syntax, with configuration beans, as the following example shows: @Bean fun kotlinPropertyConfigurer()

in Java, users in Kotlin is strongly typed, but Kotlin’s clever type inference allows for shorter syntax. 1.3. Null-safety One of Kotlin’s key features is null-safety, which cleanly deals with null values registerBean() registerBean() } In order to allow a more declarative approach and cleaner syntax, Spring Framework provides a Kotlin bean definition DSL It declares an ApplicationContextInitializer can customize existing code (such as Spring Boot actuators or @LocalServerPort) that uses the ${…} syntax, with configuration beans, as the following example shows: @Bean fun kotlinPropertyConfigurer()

which provides a convenient mechanism for reading an InputStream from locations defined in a URI syntax. In particular, Resource paths are used to construct applications contexts, as described in Application places constraints on the configuration model, in that references to other beans must be valid Java syntax. Fortunately, solving this problem is simple. As we already discussed, a @Bean method can have an information in the compiled byte code), individual arguments are also available using the #a<#arg> syntax where <#arg> stands for the argument index (starting from 0). #blEvent or #a0 (you can also

Groovy DSL. This is similar in concept to using XML bean definitions but allows for a more concise syntax. Using Groovy also allows you to easily embed bean definitions directly in your bootstrap code. For which provides a convenient mechanism for reading an InputStream from locations defined in a URI syntax. In particular, Resource paths are used to construct applications contexts as described in the section places constraints on the configuration model, in that references to other beans must be valid Java syntax. Fortunately, solving this problem is simple. As we already discussed, @Bean method can have an

Groovy DSL. This is similar in concept to using XML bean definitions but allows for a more concise syntax. Using Groovy also allows you to easily embed bean definitions directly in your bootstrap code. For which provides a convenient mechanism for reading an InputStream from locations defined in a URI syntax. In particular, Resource paths are used to construct applications contexts as described in the section places constraints on the configuration model, in that references to other beans must be valid Java syntax. Fortunately, solving this problem is simple. As we already discussed, @Bean method can have an

Groovy DSL. This is similar in concept to using XML bean definitions but allows for a more concise syntax. Using Groovy also allows you to easily embed bean definitions directly in your bootstrap code. For which provides a convenient mechanism for reading an InputStream from locations defined in a URI syntax. In particular, Resource paths are used to construct applications contexts as described in Section places constraints on the configuration model, in that references to other beans must be valid Java syntax. Fortunately, solving this problem is simple. As we already discussed, @Bean method can have an

Groovy DSL. This is similar in concept to using XML bean definitions but allows for a more concise syntax. Using Groovy also allows you to easily embed bean definitions directly in your bootstrap code. For which provides a convenient mechanism for reading an InputStream from locations defined in a URI syntax. In particular, Resource paths are used to construct applications contexts as described in Section places constraints on the configuration model, in that references to other beans must be valid Java syntax. Spring Framework Reference Documentation 4.3.2.RELEASE Spring Framework 129 Fortunately, solving

as a single test PropertySource with the highest precedence. The supported syntax for key-value pairs is the same as the syntax defined for entries in a Java properties file: • key=value • key:value MyIntegrationTests { // class body... } ① Setting two properties by using two variations of the key-value syntax. Kotlin @ContextConfiguration @TestPropertySource(properties = ["timezone = GMT", "port: 4242"]) MyIntegrationTests { // class body... } ① Setting two properties by using two variations of the key-value syntax.  As of Spring Framework 5.2, @TestPropertySource can be used as repeatable annotation. That

with Spring. It allows you to run Groovy scripts, which means that you have a familiar Java-like syntax, without so much boilerplate code. You don’t need to use the CLI to work with Spring Boot but it’s number.less.than.ten=${random.int(10)} my.number.in.range=${random.int[1024,65536]} The random.int* syntax is OPEN value (,max) CLOSE where the OPEN,CLOSE are any character and value,max are integers. If in the Spring Environment. This allows you to use the familiar @Value annotation with placeholders syntax to access YAML properties. Multi-profile YAML documents You can specify multiple profile-specific

with Spring. It allows you to run Groovy scripts, which means that you have a familiar Java-like syntax, without so much boilerplate code. You don’t need to use the CLI to work with Spring Boot but it’s number.less.than.ten=${random.int(10)} my.number.in.range=${random.int[1024,65536]} The random.int* syntax is OPEN value (,max) CLOSE where the OPEN,CLOSE are any character and value,max are integers. If in the Spring Environment. This allows you to use the familiar @Value annotation with placeholders syntax to access YAML properties. Multi-profile YAML documents You can specify multiple profile-specific