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+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+option java_package = "ex.grpc";
+option objc_class_prefix = "RTG";
+
+package examples;
+
+// Interface exported by the server.
+service RouteGuide {
+ // A simple RPC.
+ //
+ // Obtains the feature at a given position.
+ //
+ // A feature with an empty name is returned if there's no feature at the given
+ // position.
+ rpc GetFeature(Point) returns (Feature) {}
+
+ // A server-to-client streaming RPC.
+ //
+ // Obtains the Features available within the given Rectangle. Results are
+ // streamed rather than returned at once (e.g. in a response message with a
+ // repeated field), as the rectangle may cover a large area and contain a
+ // huge number of features.
+ rpc ListFeatures(Rectangle) returns (stream Feature) {}
+
+ // A client-to-server streaming RPC.
+ //
+ // Accepts a stream of Points on a route being traversed, returning a
+ // RouteSummary when traversal is completed.
+ rpc RecordRoute(stream Point) returns (RouteSummary) {}
+
+ // A Bidirectional streaming RPC.
+ //
+ // Accepts a stream of RouteNotes sent while a route is being traversed,
+ // while receiving other RouteNotes (e.g. from other users).
+ rpc RouteChat(stream RouteNote) returns (stream RouteNote) {}
+}
+
+// Points are represented as latitude-longitude pairs in the E7 representation
+// (degrees multiplied by 10**7 and rounded to the nearest integer).
+// Latitudes should be in the range +/- 90 degrees and longitude should be in
+// the range +/- 180 degrees (inclusive).
+message Point {
+ int32 latitude = 1;
+ int32 longitude = 2;
+}
+
+// A latitude-longitude rectangle, represented as two diagonally opposite
+// points "lo" and "hi".
+message Rectangle {
+ // One corner of the rectangle.
+ Point lo = 1;
+
+ // The other corner of the rectangle.
+ Point hi = 2;
+}
+
+// A feature names something at a given point.
+//
+// If a feature could not be named, the name is empty.
+message Feature {
+ // The name of the feature.
+ string name = 1;
+
+ // The point where the feature is detected.
+ Point location = 2;
+}
+
+// A RouteNote is a message sent while at a given point.
+message RouteNote {
+ // The location from which the message is sent.
+ Point location = 1;
+
+ // The message to be sent.
+ string message = 2;
+}
+
+// A RouteSummary is received in response to a RecordRoute rpc.
+//
+// It contains the number of individual points received, the number of
+// detected features, and the total distance covered as the cumulative sum of
+// the distance between each point.
+message RouteSummary {
+ // The number of points received.
+ int32 point_count = 1;
+
+ // The number of known features passed while traversing the route.
+ int32 feature_count = 2;
+
+ // The distance covered in metres.
+ int32 distance = 3;
+
+ // The duration of the traversal in seconds.
+ int32 elapsed_time = 4;
+}