wehub-resource-sync
42 lines
1.5 KiB
C#
42 lines
1.5 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System.IO;
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using System.ComponentModel.Composition;
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using System;
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namespace QuantConnect.Interfaces
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{
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/// <summary>
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/// Fetches a remote file for a security.
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/// Must save the file to Globals.DataFolder.
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/// </summary>
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[InheritedExport(typeof(IDataProvider))]
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public interface IDataProvider
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{
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/// <summary>
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/// Event raised each time data fetch is finished (successfully or not)
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/// </summary>
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event EventHandler<DataProviderNewDataRequestEventArgs> NewDataRequest;
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/// <summary>
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/// Retrieves data to be used in an algorithm
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/// </summary>
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/// <param name="key">A string representing where the data is stored</param>
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/// <returns>A <see cref="Stream"/> of the data requested</returns>
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Stream Fetch(string key);
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}
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}
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