| #region Copyright notice and license |
| // 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. |
| #endregion |
| |
| using System; |
| using System.Collections.Generic; |
| using System.Linq; |
| using System.Text; |
| using System.Threading.Tasks; |
| |
| using Grpc.Core; |
| using Grpc.Core.Utils; |
| using Grpc.Health.V1; |
| |
| namespace Grpc.HealthCheck |
| { |
| /// <summary> |
| /// Implementation of a simple Health service. Useful for health checking. |
| /// |
| /// Registering service with a server: |
| /// <code> |
| /// var serviceImpl = new HealthServiceImpl(); |
| /// server = new Server(); |
| /// server.AddServiceDefinition(Grpc.Health.V1.Health.BindService(serviceImpl)); |
| /// </code> |
| /// </summary> |
| public class HealthServiceImpl : Grpc.Health.V1.Health.HealthBase |
| { |
| private readonly object myLock = new object(); |
| private readonly Dictionary<string, HealthCheckResponse.Types.ServingStatus> statusMap = |
| new Dictionary<string, HealthCheckResponse.Types.ServingStatus>(); |
| |
| /// <summary> |
| /// Sets the health status for given service. |
| /// </summary> |
| /// <param name="service">The service. Cannot be null.</param> |
| /// <param name="status">the health status</param> |
| public void SetStatus(string service, HealthCheckResponse.Types.ServingStatus status) |
| { |
| lock (myLock) |
| { |
| statusMap[service] = status; |
| } |
| } |
| |
| /// <summary> |
| /// Clears health status for given service. |
| /// </summary> |
| /// <param name="service">The service. Cannot be null.</param> |
| public void ClearStatus(string service) |
| { |
| lock (myLock) |
| { |
| statusMap.Remove(service); |
| } |
| } |
| |
| /// <summary> |
| /// Clears statuses for all services. |
| /// </summary> |
| public void ClearAll() |
| { |
| lock (myLock) |
| { |
| statusMap.Clear(); |
| } |
| } |
| |
| /// <summary> |
| /// Performs a health status check. |
| /// </summary> |
| /// <param name="request">The check request.</param> |
| /// <param name="context">The call context.</param> |
| /// <returns>The asynchronous response.</returns> |
| public override Task<HealthCheckResponse> Check(HealthCheckRequest request, ServerCallContext context) |
| { |
| lock (myLock) |
| { |
| var service = request.Service; |
| |
| HealthCheckResponse.Types.ServingStatus status; |
| if (!statusMap.TryGetValue(service, out status)) |
| { |
| // TODO(jtattermusch): returning specific status from server handler is not supported yet. |
| throw new RpcException(new Status(StatusCode.NotFound, "")); |
| } |
| return Task.FromResult(new HealthCheckResponse { Status = status }); |
| } |
| } |
| } |
| } |