39 lines
1 KiB
Markdown
39 lines
1 KiB
Markdown
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# ADR: We implement domain services static
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Domain services can be implemented either as object (and composed like done in spring / example1 ) or with extension
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function and composed static (see example2).
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## example1
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```kotlin
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class DesktopServie(val aptApi: AptApi, val prov: Prov) {
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fun provisionIdeDesktop(onlyModules: List<String>? = null) {
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prov.task {
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if (onlyModules == null) {
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aptApi.aptInstall(OPEN_VPM)
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}
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}
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}
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}
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```
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## example2
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```kotlin
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fun Prov.provisionIdeDesktop(onlyModules: List<String>? = null) {
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if (onlyModules == null) {
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aptInstall(OPEN_VPM)
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}
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}
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```
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## Decission
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We use extension function and composed static.
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## Reason
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1. Similar to composed objects we can easily mock `aptInstall` in tests. Both solutions are equivalent.
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2. Inheritance in case of composed objects we can solve by static composition.
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3. Object composition we can solve by static composition.
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There is no reason left to change the current implementd pattern.
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