spring property substitution for test and production

Question

I ran into this for property substitution in spring

but u

Answer 1

several approaches:

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1. 'Order' Property

in src/main/resources/your-conf.xml

in src/test/resources/your-test-config.xml

If you running your test with src/test/resources as a test classpath, the above will ensure to override src/main/resources/esb-project-config.properties with the src/test/resources/esb-project-config.properties.

This will override the whole property-placeholder though, so you would have to provide all the properties needed in your application in for this test property-placeholder. e.g.

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2. PropertyOverrideConfigurer

to override certain individual properties. Some examples here

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3. System Variables

You can use a prefix to control environment specific properties, this can be done by using system variables:

In this case it will always look under:

by default, unless a ENV_SYSTEM system variable is set. If it is set to qa, for example, it will automatically look under:

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4. Spring Profiles

Another approach is to make beans profile specific. For example:

The appropriate esb-project-config will loaded depending on a profile set. For example this will load esb-project-config.dev.properties:

GenericXmlApplicationContext ctx = new GenericXmlApplicationContext();
ctx.getEnvironment().setActiveProfiles( "dev" );
ctx.load( "classpath:/org/boom/bang/config/xml/*-config.xml" );
ctx.refresh();

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• NOTE: "System Variables" and "System Profiles" approaches are usually used to switch between different environments rather than just "dev <==> test" in dev mode, but still are useful capabilities to be aware of.