Spring application can be configured using YAML as effectively as using properties file. With YAML file one can,
Create environment specific profiles
Define properties at application level
Define (or override) properties at profile level
Spring Framework loads application.yml by default just the way it loads application.properties. If you want to change the name of the yml file you'll have to use context loader to tell what file to look for.
Must knows of the yml based configuration
- Profiles - YML supports multiple profiles in a single file. One can define environment specific configurations as profiles in a single file.
- Profiles separator - YML configuration file uses 3 dashes (---) to separate a profile. Every property you define after --- is specific to that profile.
- Profile name - Give profile a name using spring.config.activate.on-profile property.
- Active profile(s) - Define which profile or profiles are active using spring.profiles.active property. More than one profile can be active using comma separated profile names.
- Property overriding - If a property is defined more than once in a file, the last occurrence of the property is used. If same property is defined in multiple "active" profiles, last occurrence of the property is used.
E.g.
In this configuration file,
- 2 profiles are defined, mongo and marklogic
- document-writer, batch-size, number-of-documents and document-format properties are common to both profiles
- database property is defined differently for each profile
- host property is available only to marklogic profile. Attempting to use host property when marklogic profile is not active will result in an error.
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ReplyDeleteSpring application can be configured using YAML as effectively as using a properties file. With a YAML file, developers can create environment-specific profiles, define properties at the application level, and define or override properties at the profile level. Spring Framework loads application.yml by default, just as it loads application.properties. If the YAML file has a different name, a context loader must be used to specify the file to load.
ReplyDeleteYAML-based configuration supports multiple profiles in a single file, allowing environment-specific configurations to be maintained together. Three dashes (---) are used as the profile separator, and properties defined after the separator apply to that profile. A profile name can be specified using spring.config.activate.on-profile, while spring.profiles.active can be used to define the active profile or profiles. Multiple profiles can be activated using comma-separated profile names. Spring Boot ReactJS Full Stack Developer Course
Property overriding is another important aspect of YAML configuration. If a property is defined more than once in the file, the last occurrence is used. When the same property is defined differently in multiple active profiles, the last occurrence is used. For example, a configuration can contain mongo and marklogic profiles, with common properties such as document-writer, batch-size, number-of-documents, and document-format, while the database property differs between the profiles. The host property can be specific to the marklogic profile and is unavailable when that profile is not active. Spring Boot NextJS Full Stack Developer Course
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