FileLifeCycleHookChain.cs

// Copyright 2019 Serilog Contributors
//
// 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.

using System;
using System.IO;
using System.Text;

namespace Serilog.Sinks.File
{
    class FileLifeCycleHookChain : FileLifecycleHooks
    {
        private readonly FileLifecycleHooks _first;
        private readonly FileLifecycleHooks _second;

        public FileLifeCycleHookChain(FileLifecycleHooks first, FileLifecycleHooks second)
        {
            _first = first ?? throw new ArgumentNullException(nameof(first));
            _second = second ?? throw new ArgumentNullException(nameof(second));
        }

        public override Stream OnFileOpened(Stream underlyingStream, Encoding encoding)
        {
            var firstStreamResult = _first.OnFileOpened(underlyingStream, encoding);
            var secondStreamResult = _second.OnFileOpened(firstStreamResult, encoding);

            return secondStreamResult;
        }

        public override void OnFileDeleting(string path)
        {
            _first.OnFileDeleting(path);
            _second.OnFileDeleting(path);
        }
    }
}