Support setting value "NotAvailable"

kuksa_databroker/databroker-cli/src/main.rs

@@ -1308,6 +1308,12 @@ fn try_into_data_value(
     input: &str,
     data_type: proto::v1::DataType,
 ) -> Result<proto::v1::datapoint::Value, ParseError> {
+    if input == "NotAvailable" {
+        return Ok(proto::v1::datapoint::Value::FailureValue(
+            proto::v1::datapoint::Failure::NotAvailable as i32,
+        ));
+    }
+
     match data_type {
         proto::v1::DataType::String => {
             Ok(proto::v1::datapoint::Value::StringValue(input.to_owned()))

kuksa_databroker/databroker/src/broker.rs

@@ -371,6 +371,11 @@ impl Entry {
     }
 
     fn validate_value(&self, value: &DataValue) -> Result<(), UpdateError> {
+        // Not available is always valid
+        if value == &DataValue::NotAvailable {
+            return Ok(());
+        }
+
         // Validate value
         match self.metadata.data_type {
             DataType::Bool => match value {