com.pervasive.datarush.io

Interface IOChannelStatsCollector

public interface IOChannelStatsCollector

Gathers statistics for an I/O channel. A IOChannelStatsCollector is normally obtained by calling IOMonitoringContext.newCollector(String, IOChannelOperation). However, it is also possible to create one outside of a monitoring context.

The creator is responsible for ensuring I/O operations are instrumented. To avoid this requirement, consider using the various methods in IOMonitoringContext which wrap existing streams with instrumented versions instead of directly creating collectors.

Method Summary

Modifier and Type	Method and Description
void	close() Should be called upon close to avoid accumulation of statistics collectors
void	finishedIO(long bytesTransferred) Marks the completion of an I/O operation.
void	startedIO() Marks the start of an I/O operation.

Method Detail

startedIO

void startedIO()

Marks the start of an I/O operation. A subsequent call to finishedIO(long) is expected to mark the end.

finishedIO

void finishedIO(long bytesTransferred)

Marks the completion of an I/O operation. The number of bytes transferred should be supplied, so that a running sum of bytes for this I/O channel can be maintained.

Parameters:

bytesTransferred - the number of bytes transferred by the operation

close

void close()

Should be called upon close to avoid accumulation of statistics collectors