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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: ObjectCacheServer
* File: CacheConstants.cs
*
* CacheConstants.cs is part of ObjectCacheServer which is
* part of the larger VNLib collection of libraries and utilities.
*
* ObjectCacheServer is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* ObjectCacheServer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System;
namespace VNLib.Data.Caching.ObjectCache.Server
{
internal static class CacheConstants
{
/// <summary>
/// The default path for the VNCache well known endpoint (aka discovery endpoint)
/// </summary>
public const string DefaultWellKnownPath = "/.well-known/vncache";
/// <summary>
/// The maximum size of buffers for FBM messages sent between servers.
/// </summary>
public const int MaxSyncMessageSize = 12 * 1024;
/// <summary>
/// The maximum size of the change queue for the cache listener
/// </summary>
public const int CacheListenerChangeQueueSize = 10000;
/// <summary>
/// The time a client authorization token is valid for
/// </summary>
public static readonly TimeSpan ClientAuthTokenExpiration = TimeSpan.FromSeconds(30);
public static class LogScopes
{
/// <summary>
/// The log scope for the cache listener
/// </summary>
public const string BlobCacheListener = "CacheListener";
/// <summary>
/// The peer discovery log scope
/// </summary>
public const string PeerDiscovery = "DISC";
/// <summary>
/// The log scope for the replication FBM client debug log (if debugging is enabled)
/// </summary>
public const string ReplicationFbmDebug = "REPL-CLNT";
/// <summary>
/// The log scope for cache replication events
/// </summary>
public const string RepliactionManager = "REPL-MGR";
/// <summary>
/// The log scope for the cache listener change event queue
/// </summary>
public const string CacheListenerPubQueue = "QUEUE";
/// <summary>
/// The log scope for the cache connection websocket endpoint
/// </summary>
public const string ConnectionEndpoint = "CONEP";
}
public static class Delays
{
/// <summary>
/// The amount of startup delay before starting an initial peer discovery
/// </summary>
public static readonly TimeSpan InitialDiscovery = TimeSpan.FromSeconds(15);
/// <summary>
/// The amount of time to wait before retrying a failed resolve
/// of a well-known peers
/// </summary>
public static readonly TimeSpan WellKnownResolveFailed = TimeSpan.FromSeconds(20);
/// <summary>
/// The amount of time to wait when getting the value of a changed item from the cache
/// </summary>
/// <remarks>
/// When an item change was detected from another peer, the cache will wait this
/// amount of time to get the new value from the cache before timing out.
/// </remarks>
public static readonly TimeSpan CacheSyncGetItemTimeout = TimeSpan.FromSeconds(10);
}
}
}
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