fix license violation

rust/datafusion/Cargo.toml

@@ -58,7 +58,7 @@ criterion = "0.2.0"
 tempdir = "0.3.7"
 futures = "0.3"
 prost = "0.6"
-tokio = { version = "0.2", features = ["full"] }
+tokio = { version = "0.2", features = ["macros"] }
 tonic = "0.1"
 flatbuffers = "0.6.0"
 arrow-flight = { path = "../arrow-flight", version = "0.16.0-SNAPSHOT" }

rust/datafusion/examples/flight-server.rs

@@ -1,3 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 use std::pin::Pin;
 
 use futures::Stream;