squidex/backend/src/Squidex.Infrastructure.GetEventStore/Diagnostics/GetEventStoreHealthCheck.cs

// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using EventStore.Client;
using Microsoft.Extensions.Diagnostics.HealthChecks;

namespace Squidex.Infrastructure.Diagnostics
{
    public sealed class GetEventStoreHealthCheck : IHealthCheck
    {
        private readonly EventStoreClient client;

        public GetEventStoreHealthCheck(EventStoreClientSettings settings)
        {
            client = new EventStoreClient(settings);
        }

        public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context,
            CancellationToken cancellationToken = default)
        {
            await client.ReadStreamAsync(Direction.Forwards, "test", default, cancellationToken: cancellationToken)
                .FirstOrDefaultAsync(cancellationToken);

            return HealthCheckResult.Healthy("Application must query data from EventStore.");
        }
    }
}