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/*
* Copyright (c) 2023 Vaughn Nugent
*
* Library: VNLib
* Package: ObjectCacheServer
* File: ObjectCacheServerEntry.cs
*
* ObjectCacheServerEntry.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;
using System.IO;
using System.Net;
using System.Linq;
using System.Net.Http;
using System.Threading;
using System.Net.Sockets;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.Security.Cryptography;
using VNLib.Plugins;
using VNLib.Utils.Memory;
using VNLib.Utils.Logging;
using VNLib.Utils.Memory.Diagnostics;
using VNLib.Hashing.IdentityUtility;
using VNLib.Data.Caching.Extensions;
using static VNLib.Data.Caching.Constants;
using VNLib.Net.Messaging.FBM;
using VNLib.Net.Messaging.FBM.Client;
using VNLib.Plugins.Cache.Broker.Endpoints;
using VNLib.Plugins.Extensions.Loading;
using VNLib.Plugins.Extensions.Loading.Routing;
using VNLib.Data.Caching.ObjectCache.Server.Endpoints;
namespace VNLib.Data.Caching.ObjectCache.Server
{
sealed record class CacheAuthKeyStore(PluginBase Plugin)
{
public Task<ReadOnlyJsonWebKey> GetCachePublicAsync()
{
return Plugin.TryGetSecretAsync("cache_private_key").ToJsonWebKey(true);
}
public Task<ReadOnlyJsonWebKey> GetCachePrivateAsync()
{
return Plugin.TryGetSecretAsync("cache_private_key").ToJsonWebKey(true);
}
public Task<ReadOnlyJsonWebKey> GetBrokerPublicAsync()
{
return Plugin.TryGetSecretAsync("broker_public_key").ToJsonWebKey(true);
}
public Task<ReadOnlyJsonWebKey> GetClientPublicKeyAsync()
{
return Plugin.TryGetSecretAsync("client_public_key").ToJsonWebKey(true);
}
}
internal interface IBrokerHeartbeatNotifier
{
/// <summary>
/// Called when the heartbeat endpoint receives a heartbeat from the broker
/// </summary>
void HearbeatReceived();
/// <summary>
/// Gets the current auth token sent to the broker, which is expected to be sent back in the heartbeat
/// </summary>
/// <returns>The heartbeat auth token if set</returns>
string? GetAuthToken();
/// <summary>
/// Gets the address of the broker server
/// </summary>
/// <returns>The full address of the broker server to connect to</returns>
Uri GetBrokerAddress();
/// <summary>
/// Gets the public key of the broker server
/// </summary>
/// <returns>The broker's public key</returns>
ReadOnlyJsonWebKey GetBrokerPublicKey();
}
public sealed class ObjectCacheServerEntry : PluginBase
{
public override string PluginName => "ObjectCache.Service";
private readonly Lazy<IUnmangedHeap> _cacheHeap;
/// <summary>
/// Gets the shared heap for the plugin
/// </summary>
internal IUnmangedHeap CacheHeap => _cacheHeap.Value;
public ObjectCacheServerEntry()
{
//Init heap
_cacheHeap = new Lazy<IUnmangedHeap>(InitializeHeap, LazyThreadSafetyMode.PublicationOnly);
}
private IUnmangedHeap InitializeHeap()
{
//Create default heap
IUnmangedHeap _heap = MemoryUtil.InitializeNewHeapForProcess();
try
{
//If the plugin is in debug mode enable heap tracking
return this.IsDebug() ? new TrackedHeapWrapper(_heap) : _heap;
}
catch
{
_heap.Dispose();
throw;
}
}
protected override void OnLoad()
{
try
{
//Setup Node config
NodeConfig nodeConf = this.GetOrCreateSingleton<NodeConfig>();
//Init connect endpoint
ConnectEndpoint endpoint = this.Route<ConnectEndpoint>();
//Route the broker endpoint
this.Route<BrokerHeartBeatEndpoint>();
//Setup discovery endpoint
if(this.HasConfigForType<PeerDiscoveryEndpoint>())
{
this.Route<PeerDiscoveryEndpoint>();
}
ulong maxByteSize = ((ulong)endpoint.CacheConfig.MaxCacheEntries * (ulong)endpoint.CacheConfig.BucketCount * (ulong)endpoint.CacheConfig.MaxMessageSize);
//Log max memory usage
Log.Debug("Maxium memory consumption {mx}Mb", maxByteSize / (ulong)(1024 * 1000));
Log.Information("Plugin loaded");
}
catch (KeyNotFoundException kne)
{
Log.Error("Missing required configuration variables {m}", kne.Message);
}
}
protected override void OnUnLoad()
{
//dispose heap if initialized
if(_cacheHeap.IsValueCreated)
{
_cacheHeap.Value.Dispose();
}
Log.Information("Plugin unloaded");
}
protected override void ProcessHostCommand(string cmd)
{
throw new NotImplementedException();
}
}
}
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