// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.

namespace Org.Apache.REEF.Wake.Impl
{
    /// <summary>Stage that synchronously executes an event handler</summary>
    public class SyncStage<T> : AbstractEStage<T>
    {
        private readonly IEventHandler<T> _handler;

        /// <summary>Constructs a synchronous stage</summary>
        /// <param name="handler">an event handler</param>
        public SyncStage(IEventHandler<T> handler) : base(handler.GetType().FullName)
        {
            _handler = handler;
        }

        /// <summary>Invokes the handler for the event</summary>
        /// <param name="value">an event</param>
        public override void OnNext(T value)
        {
            base.OnNext(value);
            _handler.OnNext(value);
        }

        public override void Dispose()
        {
        }
    }
}