com.netflix.servo.publish

Class FileMetricObserver

java.lang.Object

com.netflix.servo.publish.BaseMetricObserver

com.netflix.servo.publish.FileMetricObserver

All Implemented Interfaces:

MetricObserver

public final class FileMetricObserver
extends BaseMetricObserver

Writes observations to a file. The format is a basic text file with tabs separating the fields.

Constructor Summary

Constructors

Constructor and Description
FileMetricObserver(java.lang.String name, java.io.File dir) Creates a new instance that stores files in dir with a prefix of name and a suffix of a timestamp in the format yyyy_MM_dd_HH_mm_ss_SSS.
FileMetricObserver(java.lang.String name, java.io.File dir, boolean compress) Creates a new instance that stores files in dir with a prefix of name and a suffix of a timestamp in the format yyyy_MM_dd_HH_mm_ss_SSS.
FileMetricObserver(java.lang.String name, java.lang.String namePattern, java.io.File dir, boolean compress) Creates a new instance that stores files in dir with a name that is created using namePattern.
FileMetricObserver(java.lang.String name, java.lang.String namePattern, java.io.File dir, boolean compress, Clock clock) Creates a new instance that stores files in dir with a name that is created using namePattern.

Method Summary

Modifier and Type	Method and Description
void	updateImpl(java.util.List<Metric> metrics) Update method that should be defined by sub-classes.

Methods inherited from class com.netflix.servo.publish.BaseMetricObserver

getFailedUpdateCount, getName, getUpdateCount, incrementFailedCount, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileMetricObserver

public FileMetricObserver(java.lang.String name,
                          java.io.File dir)

Creates a new instance that stores files in dir with a prefix of name and a suffix of a timestamp in the format yyyy_MM_dd_HH_mm_ss_SSS.

Parameters:

name - name to use as a prefix on files

dir - directory where observations will be stored

FileMetricObserver

public FileMetricObserver(java.lang.String name,
                          java.io.File dir,
                          boolean compress)

Creates a new instance that stores files in dir with a prefix of name and a suffix of a timestamp in the format yyyy_MM_dd_HH_mm_ss_SSS.

Parameters:

name - name to use as a prefix on files

dir - directory where observations will be stored

compress - whether to compress our output

FileMetricObserver

public FileMetricObserver(java.lang.String name,
                          java.lang.String namePattern,
                          java.io.File dir,
                          boolean compress)

Creates a new instance that stores files in dir with a name that is created using namePattern.

Parameters:

name - name of the observer

namePattern - date format pattern used to create the file names

dir - directory where observations will be stored

compress - whether to compress our output

FileMetricObserver

public FileMetricObserver(java.lang.String name,
                          java.lang.String namePattern,
                          java.io.File dir,
                          boolean compress,
                          Clock clock)

Creates a new instance that stores files in dir with a name that is created using namePattern.

Parameters:

name - name of the observer

namePattern - date format pattern used to create the file names

dir - directory where observations will be stored

compress - whether to compress our output

clock - clock instance to use for getting the time used in the filename

Method Detail

updateImpl

public void updateImpl(java.util.List<Metric> metrics)

Update method that should be defined by sub-classes. This method will get invoked and counts will be maintained in the base observer.

Specified by:

updateImpl in class BaseMetricObserver