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- // Copyright 2015 The gRPC Authors
- //
- // Licensed 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.
- // The canonical version of this proto can be found at
- // https://github.com/grpc/grpc-proto/blob/master/grpc/health/v1/health.proto
- syntax = "proto3";
- package grpc.health.v1;
- option csharp_namespace = "Grpc.Health.V1";
- option go_package = "google.golang.org/grpc/health/grpc_health_v1";
- option java_multiple_files = true;
- option java_outer_classname = "HealthProto";
- option java_package = "io.grpc.health.v1";
- message HealthCheckRequest {
- string service = 1;
- }
- message HealthCheckResponse {
- enum ServingStatus {
- UNKNOWN = 0;
- SERVING = 1;
- NOT_SERVING = 2;
- SERVICE_UNKNOWN = 3; // Used only by the Watch method.
- }
- ServingStatus status = 1;
- }
- service Health {
- // If the requested service is unknown, the call will fail with status
- // NOT_FOUND.
- rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
- // Performs a watch for the serving status of the requested service.
- // The server will immediately send back a message indicating the current
- // serving status. It will then subsequently send a new message whenever
- // the service's serving status changes.
- //
- // If the requested service is unknown when the call is received, the
- // server will send a message setting the serving status to
- // SERVICE_UNKNOWN but will *not* terminate the call. If at some
- // future point, the serving status of the service becomes known, the
- // server will send a new message with the service's serving status.
- //
- // If the call terminates with status UNIMPLEMENTED, then clients
- // should assume this method is not supported and should not retry the
- // call. If the call terminates with any other status (including OK),
- // clients should retry the call with appropriate exponential backoff.
- rpc Watch(HealthCheckRequest) returns (stream HealthCheckResponse);
- }
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