/// <summary>
/// Write to a sink only when <paramref name="expression" /> evaluates to <c>true</c>.
/// </summary>
/// <param name="loggerSinkConfiguration">Sink configuration.</param>
/// <param name="expression">An expression that evaluates to <c>true</c> when the
/// supplied <see cref="T:Serilog.Events.LogEvent" />
/// should be written to the configured sink.</param>
/// <param name="configureSink">An action that configures the wrapped sink.</param>
/// <returns>Configuration object allowing method chaining.</returns>
/// <returns>The underlying <see cref="LoggerConfiguration"/>.</returns>
public static LoggerConfiguration Conditional(
this LoggerSinkConfiguration loggerSinkConfiguration,
string expression,
Action <LoggerSinkConfiguration> configureSink)
{
if (loggerSinkConfiguration == null)
{
throw new ArgumentNullException(nameof(loggerSinkConfiguration));
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (configureSink == null)
{
throw new ArgumentNullException(nameof(configureSink));
}
var compiled = SerilogExpression.Compile(expression);
return(loggerSinkConfiguration.Conditional(e => Coerce.IsTrue(compiled(e)), configureSink));
}
/// <summary>
/// Write to a sink only when <paramref name="expression" /> evaluates to <c>true</c>.
/// </summary>
/// <param name="loggerSinkConfiguration">Sink configuration.</param>
/// <param name="expression">An expression that evaluates to <c>true</c> when the
/// supplied <see cref="T:Serilog.Events.LogEvent" />
/// should be written to the configured sink.</param>
/// <param name="configureSink">An action that configures the wrapped sink.</param>
/// <returns>Configuration object allowing method chaining.</returns>
/// <returns>The underlying <see cref="LoggerConfiguration"/>.</returns>
public static LoggerConfiguration Conditional(
this LoggerSinkConfiguration loggerSinkConfiguration,
string expression,
Action <LoggerSinkConfiguration> configureSink)
{
if (loggerSinkConfiguration == null)
{
throw new ArgumentNullException(nameof(loggerSinkConfiguration));
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (configureSink == null)
{
throw new ArgumentNullException(nameof(configureSink));
}
var compiled = FilterLanguage.CreateFilter(expression);
return(loggerSinkConfiguration.Conditional(e => true.Equals(compiled(e)), configureSink));
}
/// <summary>
/// Write log events to a <a href="https://datalust.co/seq">Seq</a> server.
/// </summary>
/// <param name="loggerSinkConfiguration">The logger configuration.</param>
/// <param name="serverUrl">The base URL of the Seq server that log events will be written to.</param>
/// <param name="restrictedToMinimumLevel">The minimum log event level required
/// in order to write an event to the sink.</param>
/// <param name="batchPostingLimit">The maximum number of events to post in a single batch.</param>
/// <param name="period">The time to wait between checking for event batches.</param>
/// <param name="bufferBaseFilename">Path for a set of files that will be used to buffer events until they
/// can be successfully transmitted across the network. Individual files will be created using the
/// pattern <paramref name="bufferBaseFilename"/>*.json, which should not clash with any other filenames
/// in the same directory.</param>
/// <param name="apiKey">A Seq <i>API key</i> that authenticates the client to the Seq server.</param>
/// <param name="bufferSizeLimitBytes">The maximum amount of data, in bytes, to which the buffer
/// log file for a specific date will be allowed to grow. By default no limit will be applied.</param>
/// <param name="eventBodyLimitBytes">The maximum size, in bytes, that the JSON representation of
/// an event may take before it is dropped rather than being sent to the Seq server. Specify null for no limit.
/// The default is 265 KB.</param>
/// <param name="controlLevelSwitch">If provided, the switch will be updated based on the Seq server's level setting
/// for the corresponding API key. Passing the same key to MinimumLevel.ControlledBy() will make the whole pipeline
/// dynamically controlled. Do not specify <paramref name="restrictedToMinimumLevel"/> with this setting.</param>
/// <param name="messageHandler">Used to construct the HttpClient that will send the log messages to Seq.</param>
/// <param name="retainedInvalidPayloadsLimitBytes">A soft limit for the number of bytes to use for storing failed requests.
/// The limit is soft in that it can be exceeded by any single error payload, but in that case only that single error
/// payload will be retained.</param>
/// <param name="queueSizeLimit">The maximum number of events that will be held in-memory while waiting to ship them to
/// Seq. Beyond this limit, events will be dropped. The default is 100,000. Has no effect on
/// durable log shipping.</param>
/// <returns>Logger configuration, allowing configuration to continue.</returns>
/// <exception cref="ArgumentNullException">A required parameter is null.</exception>
public static LoggerConfiguration Seq(
this LoggerSinkConfiguration loggerSinkConfiguration,
string serverUrl,
LogEventLevel restrictedToMinimumLevel = LevelAlias.Minimum,
int batchPostingLimit = DefaultBatchPostingLimit,
TimeSpan?period = null,
string?apiKey = null,
string?bufferBaseFilename = null,
long?bufferSizeLimitBytes = null,
long?eventBodyLimitBytes = 256 *1024,
LoggingLevelSwitch?controlLevelSwitch = null,
HttpMessageHandler?messageHandler = null,
long?retainedInvalidPayloadsLimitBytes = null,
int queueSizeLimit = DefaultQueueSizeLimit)
{
if (loggerSinkConfiguration == null)
{
throw new ArgumentNullException(nameof(loggerSinkConfiguration));
}
if (serverUrl == null)
{
throw new ArgumentNullException(nameof(serverUrl));
}
if (bufferSizeLimitBytes is < 0)
{
throw new ArgumentOutOfRangeException(nameof(bufferSizeLimitBytes), "Negative value provided; buffer size limit must be non-negative.");
}
if (queueSizeLimit < 0)
{
throw new ArgumentOutOfRangeException(nameof(queueSizeLimit), "Queue size limit must be non-zero.");
}
var defaultedPeriod = period ?? DefaultPeriod;
var controlledSwitch = new ControlledLevelSwitch(controlLevelSwitch);
ILogEventSink sink;
if (bufferBaseFilename == null)
{
var batchedSink = new BatchedSeqSink(
new SeqIngestionApiClient(serverUrl, apiKey, messageHandler),
eventBodyLimitBytes,
controlledSwitch);
var options = new PeriodicBatchingSinkOptions
{
BatchSizeLimit = batchPostingLimit,
Period = defaultedPeriod,
QueueLimit = queueSizeLimit
};
sink = new PeriodicBatchingSink(batchedSink, options);
}
else
{
#if DURABLE
sink = new DurableSeqSink(
serverUrl,
bufferBaseFilename,
apiKey,
batchPostingLimit,
defaultedPeriod,
bufferSizeLimitBytes,
eventBodyLimitBytes,
controlledSwitch,
messageHandler,
retainedInvalidPayloadsLimitBytes);
#else
// We keep the API consistent for easier packaging and to support bait-and-switch.
throw new NotSupportedException("Durable log shipping is not supported on this platform.");
#endif
}
return(loggerSinkConfiguration.Conditional(
controlledSwitch.IsIncluded,
wt => wt.Sink(sink, restrictedToMinimumLevel)));
}
