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Update comments describing new behaviour

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Signed-off-by: Justin Menga <justin.menga@gmail.com>
This commit is contained in:
Justin Menga 2017-05-15 11:08:16 +12:00
parent 3a4cf2b076
commit dc87490b63
1 changed files with 17 additions and 15 deletions
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32
daemon/logger/awslogs/cloudwatchlogs.go
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@ -359,22 +359,16 @@ var newTicker = func(freq time.Duration) *time.Ticker {
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. Batching is performed on time- and size-
// bases. Time-based batching occurs at a 5 second interval (defined in the
// batchPublishFrequency const). Size-based batching is performed on the
// maximum number of events per batch (defined in maximumLogEventsPerPut) and
// the maximum number of total bytes in a batch (defined in
// maximumBytesPerPut). Log messages are split by the maximum bytes per event
// (defined in maximumBytesPerEvent). There is a fixed per-event byte overhead
// (defined in perEventBytes) which is accounted for in split- and batch-
// calculations. If the awslogs-multiline-pattern or awslogs-datetime-format
// options have been configured, multiline processing is enabled, where
// log messages are stored in an event buffer until a multiline pattern match
// is found, at which point the messages in the event buffer are pushed to
// CloudWatch logs as a single log event. Multline messages still are processed
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds.
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch() {
timer := newTicker(batchPublishFrequency)
var events []wrappedEvent
@ -429,7 +423,15 @@ func (l *logStream) collectBatch() {
}
}
// processEvent processes log events
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations.
func (l *logStream) processEvent(events []wrappedEvent, unprocessedLine []byte, timestamp int64) []wrappedEvent {
bytes := 0
for len(unprocessedLine) > 0 {