/// <summary>
/// Initializes an instance of <see cref="SplunkHttpCollectorClient"/> with the specified <see cref="SplunkHttpCollectorClientOptions"/>
/// and optional <see cref="RetryPolicy"/>.
/// </summary>
/// <param name="options"></param>
/// <param name="retryPolicy"></param>
/// <param name="fallback">Action to perform if Splunk is unavailable.</param>
private SplunkHttpCollectorClient(SplunkHttpCollectorClientOptions options, RetryPolicy retryPolicy = null, Action <object> fallback = null)
{
this.options = options;
this.fallback = fallback;
HttpClientHandler httpClientHandler = new HttpClientHandler
{
//Decompress the response
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
};
//Failure Injection Testing
chaosHandler = new SplunkFitDelegatingHandler(httpClientHandler);
//Transient Fault Handling
RetryDelegatingHandler retryHandler = new RetryDelegatingHandler(chaosHandler);
if (retryPolicy != null)
{
retryHandler.RetryPolicy = retryPolicy;
}
retryHandler.RetryPolicy.Retrying += OnTransientRetry;
//Compress requests
CompressionDelegatingHandler commpressionHandler = new CompressionDelegatingHandler(retryHandler);
httpClient = new HttpClient(commpressionHandler);
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
httpClient.DefaultRequestHeaders.AcceptEncoding.Add(new StringWithQualityHeaderValue("gzip"));
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Splunk", options.ApiKey);
httpClient.Timeout = options.Timeout;
}
/// <summary>
/// Creates or returns an existing instance of <see cref="SplunkHttpCollectorClient"/>.
/// </summary>
/// <remarks>
/// If an instance already exists, the new options passed in will be used for that instance. This allows
/// applications to change options like the CircuitBreakerRetryWindow and Timeout on the fly.
/// However, changing the Key or Url will have no impact.
/// </remarks>
/// <param name="options"></param>
/// <param name="retryPolicy"></param>
/// <param name="fallback">Action to perform if Splunk is unavailable.</param>
/// <returns>A singleton instance of <see cref="SplunkHttpCollectorClient"/></returns>
public static SplunkHttpCollectorClient GetInstance(SplunkHttpCollectorClientOptions options, RetryPolicy retryPolicy = null, Action <object> fallback = null)
{
if (_instance == null)
{
_instance = new SplunkHttpCollectorClient(options, retryPolicy, fallback);
}
else
{
_instance.options = options;
_instance.httpClient.Timeout = options.Timeout;
}
return(_instance);
}
