/// <summary>
/// Constructor
/// </summary>
/// <param name="dependencyParams">Notification parameters to use</param>
protected SqlDependencyProvider(SqlDependencyParams dependencyParams)
{
if (dependencyParams == null)
{
throw new ArgumentNullException(nameof(dependencyParams));
}
Parameters = dependencyParams;
SyncLock = new object();
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="dependencyParams">Notification parameters to use</param>
/// <param name="pollingPeriod">Polling period</param>
public PollingSqlDependencyProvider(SqlDependencyParams dependencyParams, TimeSpan? pollingPeriod)
: base(dependencyParams)
{
if (pollingPeriod.HasValue
&& (pollingPeriod.Value.TotalMilliseconds < 0))
{
throw new ArgumentNullException(nameof(pollingPeriod));
}
_pollingPeriod = pollingPeriod ?? DefaultPollingPeriod;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="dependencyParams">Notification parameters to use</param>
public BrokerSqlDependencyProvider(SqlDependencyParams dependencyParams)
: base(dependencyParams)
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="dependencyParams">Notification parameters to use</param>
public BrokerSqlDependencyProvider(SqlDependencyParams dependencyParams)
: base(dependencyParams)
{
}
/// <summary>
/// Creates a provider implementation
/// </summary>
/// <param name="dependencyParams">Dependency monitoring parameters</param>
/// <param name="providerType">Type of the provider to create</param>
/// <param name="serviceBrokerQueue">Queue name for the service broker implementation</param>
/// <param name="periodForPollingProvider">Period for polling implementation</param>
/// <returns>Sql Dependency Provider instance</returns>
public static SqlDependencyProvider Create(SqlDependencyParams dependencyParams,
SqlDependencyProviderType providerType,
string serviceBrokerQueue, TimeSpan? periodForPollingProvider)
{
// Validate
if (dependencyParams == null)
{
throw new ArgumentNullException(nameof(dependencyParams));
}
if (periodForPollingProvider.HasValue
&& (periodForPollingProvider.Value.TotalMilliseconds < 0))
{
throw new ArgumentNullException(nameof(periodForPollingProvider));
}
serviceBrokerQueue = string.IsNullOrWhiteSpace(serviceBrokerQueue) ? null : serviceBrokerQueue.Trim();
// Make a copy & validate
dependencyParams = dependencyParams.Clone() as SqlDependencyParams;
if (dependencyParams == null)
{
throw new ArgumentNullException(nameof(dependencyParams));
}
dependencyParams.ValidateAndAdjust();
// Check service broker availability
if ((providerType == SqlDependencyProviderType.Polling)
|| ((providerType == SqlDependencyProviderType.Auto)
&& !IsServiceBrokerEnabled(dependencyParams.ConnectionString, serviceBrokerQueue)))
{
return new PollingSqlDependencyProvider(dependencyParams, periodForPollingProvider);
}
return new BrokerSqlDependencyProvider(dependencyParams);
}
/// <summary>
/// Creates a provider implementation
/// </summary>
/// <param name="dependencyParams">Dependency monitoring parameters</param>
/// <param name="providerType">Type of the provider to create</param>
/// <param name="serviceBrokerQueue">Queue name for the service broker implementation</param>
/// <returns>Sql Dependency Provider instance</returns>
public static SqlDependencyProvider Create(SqlDependencyParams dependencyParams,
SqlDependencyProviderType providerType, string serviceBrokerQueue)
{
return Create(dependencyParams, providerType, serviceBrokerQueue, null);
}
/// <summary>
/// Creates a provider implementation
/// </summary>
/// <param name="dependencyParams">Dependency monitoring parameters</param>
/// <param name="providerType">Type of the provider to create</param>
/// <returns>Sql Dependency Provider instance</returns>
public static SqlDependencyProvider Create(SqlDependencyParams dependencyParams,
SqlDependencyProviderType providerType)
{
return Create(dependencyParams, providerType, null, null);
}
