The annotations @ConditionalOnProperty
and @ConditionalOnExpression
both do NOT have the java.lang.annotation.Repeatable
annotation so you would not be able to just add multiple annotations for checking multiple properties.
The following syntax has been tested and works:
Solution for Two Properties
@ConditionalOnExpression("${properties.first.property.enable:true} && ${properties.second.property.startServer:false}")
Note the following:
- You need to using colon notation to indicate the default value of
the property in the expression language statement
- Each property is in a separate expression language block ${}
- The && operator is used outside of the SpEL blocks
It allows for multiple properties that have differing values and can extend to multiple properties.
If you want to check more then 2 values and still maintain readability, you can use the concatenation operator between different conditions you are evaluating:
Solution for more then 2 properties
@ConditionalOnExpression("${properties.first.property.enable:true} " +
"&& ${properties.second.property.enable:true} " +
"&& ${properties.third.property.enable:true}")
The drawback is that you cannot use a matchIfMissing argument as you would be able to when using the @ConditionalOnProperty
annotation so you will have to ensure that the properties are present in the .properties or YAML files for all your profiles/environments or just rely on the default value
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