1 /*
2  * Copyright (C) 2016 The Dagger Authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package dagger.grpc.server;
18 
19 import static com.google.common.base.Preconditions.checkNotNull;
20 
21 import dagger.Module;
22 import dagger.Provides;
23 import io.grpc.Metadata;
24 
25 /**
26  * Provides {@link Metadata} about a gRPC call.
27  */
28 @Module
29 public final class GrpcCallMetadataModule {
30   private final Metadata metadata;
31 
GrpcCallMetadataModule(Metadata metadata)32   public GrpcCallMetadataModule(Metadata metadata) {
33     this.metadata = checkNotNull(metadata);
34   }
35 
36   @Provides
provideHeaders()37   Metadata provideHeaders() {
38     return metadata;
39   }
40 }
41