NullLedgerProvider.cs

using System;
using System.Threading.Tasks;
using Waher.Persistence.Serialization;
using Waher.Runtime.Profiling;
 
namespace Waher.Persistence
{
    public class NullLedgerProvider : ILedgerProvider
    {
        public NullLedgerProvider()
        {
        }
 
        public Task NewEntry(object Object) => Task.CompletedTask;
 
        public Task UpdatedEntry(object Object) => Task.CompletedTask;
 
        public Task DeletedEntry(object Object) => Task.CompletedTask;
 
        public Task ClearedCollection(string Collection) => Task.CompletedTask;
 
        public Task<ILedgerEnumerator<T>> GetEnumerator<T>() => throw new InvalidOperationException("Server is shutting down.");
 
        public Task<ILedgerEnumerator<object>> GetEnumerator(string CollectionName) => throw new InvalidOperationException("Server is shutting down.");
 
        public Task Start() => Task.CompletedTask;
 
        public Task Stop() => Task.CompletedTask;
 
        public Task Flush() => Task.CompletedTask;
 
        public Task<string[]> GetCollections() => Task.FromResult<string[]>(new string[0]);
 
        public Task<bool> Export(ILedgerExport Output, LedgerExportRestriction Restriction) => Task.FromResult(true);
 
        public Task<bool> Export(ILedgerExport Output, LedgerExportRestriction Restriction, ProfilerThread Thread) => Task.FromResult(true);
 
        public void Register(ILedgerExternalEvents ExternalEvents) { }
 
        public void Unregister(ILedgerExternalEvents ExternalEvents) { }
 
    }
}