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99 lines
3.1 KiB
99 lines
3.1 KiB
// Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0, as
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// published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an
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// additional permission to link the program and your derivative works
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// with the separately licensed software that they have included with
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// MySQL.
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//
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// Without limiting anything contained in the foregoing, this file,
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// which is part of MySQL Connector/NET, is also subject to the
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// Universal FOSS Exception, version 1.0, a copy of which can be found at
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// http://oss.oracle.com/licenses/universal-foss-exception.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System.Collections.Generic;
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namespace MySql.Data.Failover
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{
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internal abstract class FailoverGroup
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{
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#region Properties
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/// <summary>
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/// Gets and sets the host list.
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/// </summary>
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protected internal List<FailoverServer> Hosts { get; set; }
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/// <summary>
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/// Gets the active host.
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/// </summary>
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protected internal FailoverServer ActiveHost
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{
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get
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{
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if (this.Hosts == null)
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{
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return null;
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}
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if (this._activeHost != null)
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{
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return this._activeHost;
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}
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foreach (var host in this.Hosts)
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{
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if (host.IsActive)
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{
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return host;
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}
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}
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return null;
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}
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}
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#endregion
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#region Fields
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/// <summary>
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/// Active host.
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/// </summary>
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protected internal FailoverServer _activeHost;
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#endregion
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internal FailoverGroup(List<FailoverServer> hosts)
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{
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this.Hosts = hosts;
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this.SetInitialActiveServer();
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}
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/// <summary>
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/// Sets the initial active host.
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/// </summary>
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protected internal abstract void SetInitialActiveServer();
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/// <summary>
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/// Determines the next host.
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/// </summary>
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/// <returns><see cref="FailoverServer"/> object that represents the next available host.</returns>
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protected internal abstract FailoverServer GetNextHost();
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}
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}
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