PropertyAlreadyExistsException

Thrown when attempting to add a property that already exists in the store.

This exception is thrown by property store operations when trying to create or add a property with a name that is already present in the store. This prevents accidental overwrites and maintains data integrity.

To avoid this exception, either:

• Check if the property exists before adding it

• Use an update operation instead of create/add

• Remove the existing property first, then add the new one

Example:

val store = InMemoryPropertyStore()

// Safe approach - check existence first
if ("timeout" !in store) {
    store += intProperty("timeout") { value = 30 }
}

// Or handle the exception
try {
    store += intProperty("timeout") { value = 30 }
} catch (e: PropertyAlreadyExistsException) {
    store.updateProperty(intProperty("timeout") { value = 30 })
}

Parameters

See also