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SQLiteMessageQueueingService.cs
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SQLiteMessageQueueingService.cs
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// The MIT License (MIT)
//
// Copyright (c) 2016 Jesse Sweetland
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Platibus.Diagnostics;
using Platibus.Queueing;
using Platibus.Security;
namespace Platibus.SQLite
{
/// <inheritdoc />
/// <summary>
/// An <see cref="T:Platibus.IMessageQueueingService" /> implementation that stores queued
/// messages in a SQLite database
/// </summary>
public class SQLiteMessageQueueingService : AbstractMessageQueueingService<SQLiteMessageQueue>
{
/// <summary>
/// A data sink provided by the implementer to handle diagnostic events
/// </summary>
protected readonly IDiagnosticService DiagnosticService;
private readonly DirectoryInfo _baseDirectory;
private readonly ISecurityTokenService _securityTokenService;
private readonly IMessageEncryptionService _messageEncryptionService;
/// <summary>
/// Initializes a new <see cref="SQLiteMessageQueueingService"/>
/// </summary>
/// <param name="options">(Optional) Options that influence the behavior of this service</param>
/// <remarks>
/// <para>If a base directory is not specified then the base directory will default to a
/// directory named <c>platibus\queues</c> beneath the current app domain base
/// directory. If the base directory does not exist it will be created.</para>
/// <para>If a security token service is not specified then a default implementation based
/// on unsigned JWTs will be used.</para>
/// </remarks>
public SQLiteMessageQueueingService(SQLiteMessageQueueingOptions options)
{
DiagnosticService = options?.DiagnosticService ?? Diagnostics.DiagnosticService.DefaultInstance;
var baseDirectory = options?.BaseDirectory;
if (baseDirectory == null)
{
var appdomainDirectory = AppDomain.CurrentDomain.BaseDirectory;
baseDirectory = new DirectoryInfo(Path.Combine(appdomainDirectory, "platibus", "queues"));
}
_baseDirectory = baseDirectory;
_securityTokenService = options?.SecurityTokenService ?? new JwtSecurityTokenService();
_messageEncryptionService = options?.MessageEncryptionService;
}
/// <inheritdoc />
/// <summary>
/// Initializes a new <see cref="T:Platibus.SQLite.SQLiteMessageQueueingService" />
/// </summary>
/// <param name="baseDirectory">The directory in which the SQLite database files will
/// be created</param>
/// <param name="securityTokenService">(Optional) The message security token service to
/// use to issue and validate security tokens for persisted messages.</param>
/// <param name="diagnosticService">(Optional) The service through which diagnostic events
/// are reported and processed</param>
/// <remarks>
/// <para>If a base directory is not specified then the base directory will default to a
/// directory named <c>platibus\queues</c> beneath the current app domain base
/// directory. If the base directory does not exist it will be created.</para>
/// <para>If a <paramref name="securityTokenService" /> is not specified then a
/// default implementation based on unsigned JWTs will be used.</para>
/// </remarks>
[Obsolete]
public SQLiteMessageQueueingService(DirectoryInfo baseDirectory,
ISecurityTokenService securityTokenService = null,
IDiagnosticService diagnosticService = null)
: this(new SQLiteMessageQueueingOptions
{
DiagnosticService = diagnosticService,
BaseDirectory = baseDirectory,
SecurityTokenService = securityTokenService
})
{
}
/// <summary>
/// Initializes the SQLite message queueing service
/// </summary>
/// <remarks>
/// Creates directories if they do not exist
/// </remarks>
public void Init()
{
_baseDirectory.Refresh();
if (!_baseDirectory.Exists)
{
_baseDirectory.Create();
_baseDirectory.Refresh();
}
}
/// <inheritdoc />
protected override Task<SQLiteMessageQueue> InternalCreateQueue(QueueName queueName, IQueueListener listener, QueueOptions options = null,
CancellationToken cancellationToken = new CancellationToken())
{
var queue = new SQLiteMessageQueue(queueName, listener, options, DiagnosticService, _baseDirectory, _securityTokenService, _messageEncryptionService);
return Task.FromResult(queue);
}
}
}