com.facebook.presto.common

Class RuntimeMetric

java.lang.Object

com.facebook.presto.common.RuntimeMetric

@ThriftStruct
public class RuntimeMetric
extends Object

A metric exposed by a presto operator or connector. It will be aggregated at the query level.

Constructor Summary

Constructors

Constructor and Description
RuntimeMetric(String name, RuntimeUnit unit) Creates a new empty RuntimeMetric.
RuntimeMetric(String name, RuntimeUnit unit, long sum, long count, long max, long min)

Method Summary

Modifier and Type	Method and Description
void	addValue(long value)
static RuntimeMetric	copyOf(RuntimeMetric metric)
long	getCount()
long	getMax()
long	getMin()
String	getName()
long	getSum()
RuntimeUnit	getUnit()
static RuntimeMetric	merge(RuntimeMetric metric1, RuntimeMetric metric2) Merges metric1 and metric2 and returns the result.
void	mergeWith(RuntimeMetric metric) Merges metric into this object.
void	set(RuntimeMetric metric)

Methods inherited from class java.lang.Object

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

Constructor Detail

RuntimeMetric

public RuntimeMetric(String name,
                     RuntimeUnit unit)

Creates a new empty RuntimeMetric.

Parameters:

name - Name of this metric. If used in the presto core code base, this should be a value defined in RuntimeMetricName. But connectors could use arbitrary names.

unit - Unit of this metric. Available units are defined in RuntimeUnit.

RuntimeMetric

@ThriftConstructor
public RuntimeMetric(String name,
                                        RuntimeUnit unit,
                                        long sum,
                                        long count,
                                        long max,
                                        long min)

Method Detail

copyOf

public static RuntimeMetric copyOf(RuntimeMetric metric)

set

public void set(RuntimeMetric metric)

getName

@ThriftField(value=1)
public String getName()

addValue

public void addValue(long value)

merge

public static RuntimeMetric merge(RuntimeMetric metric1,
                                  RuntimeMetric metric2)

Merges metric1 and metric2 and returns the result. The input parameters are not updated.

mergeWith

public void mergeWith(RuntimeMetric metric)

Merges metric into this object.

getSum

@ThriftField(value=2)
public long getSum()

getCount

@ThriftField(value=3)
public long getCount()

getMax

@ThriftField(value=4)
public long getMax()

getMin

@ThriftField(value=5)
public long getMin()

getUnit

@ThriftField(value=6)
public RuntimeUnit getUnit()