Sometimes can be useful extract some specific attribute from a JSON string. This can be done easily with com.google.code.gson library in this way. Let’s consider the following JSON: This is the maven dependancy: And finally the code to extract the value of “field2”:

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The property sources that are added to you application by the bootstrap context are often “remote” (e.g. from a Config Server), and by default they cannot be overridden locally, except on the command line. If you want to allow your applications to override the remote properties with their own system properties or config files, the […]

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In some cases, you may want to fail startup of a Spring Boot application if it cannot connect to the Config Server. You can do that setting the bootstrap configuration property spring.cloud.config.fail-fast=true. In this way the client startup halt with an Exception. Config server may occasionally be unavailable when your application starts, you can make […]

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If you find you are repeatedly using the same attributes with @Transactional on many different methods, then Spring’s meta-annotation support allows you to define custom shortcut annotations for your specific use cases. For example, defining the following annotations: allows us to write the example from the previous section as As you can see meta-annotations can […]

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