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Add example for custom error message #1968

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8 changes: 8 additions & 0 deletions java/event-handlers/indicating-errors.md
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Expand Up @@ -132,6 +132,14 @@ You can disable these translated error messages by setting [<Config java>cds.err
### Provide custom error messages

By default, CAP Java provides error messages in several languages. If an error message or translation isn't sufficient for an application, it can be overwritten with a custom error message. Applications can provide the new error message under the respective error code in the application's `messages.properties` resource bundle under `src/main/resources`.

::: code-group
```properties [message.properties]
# Custom message for @mandatory
409003 = Please enter a value
```
:::

To know which error codes and messages are available by default, you can have a look at the Java enumeration `com.sap.cds.services.utils.CdsErrorStatuses` with your favorite IDE. This enumeration shows all available error codes and messages that are used by the CAP Java runtime.

## Target
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