org.apache.ignite.internal.processors.metric.impl

Class MetricUtils

java.lang.Object

org.apache.ignite.internal.processors.metric.impl.MetricUtils

public class MetricUtils
extends Object

Utility class to build or parse metric name in dot notation.

See Also:

GridMetricManager, MetricRegistry

Field Summary

Fields

Modifier and Type	Field and Description
static String	INF Histogram metric last interval high bound.
static String	SEPARATOR Metric name part separator.

Constructor Summary

Constructors

Constructor and Description
MetricUtils()

Method Summary

Modifier and Type	Method and Description
static String	cacheMetricsRegistryName(String cacheName, boolean isNear)
static boolean	compareAndSet(AtomicLongMetric m, long expect, long update) Atomically sets the value to the given updated value if the current value == the expected value.
static T2<String,String>	fromFullName(String name) Splits full metric name to registry name and metric name.
static String[]	histogramBucketNames(HistogramMetric metric, Map<String,T2<long[],String[]>> cache) Gets histogram bucket names.
static String	metricName(String... names) Builds metric name.
static void	setIfGreater(AtomicLongMetric m, long update) Update metrics value only if current value if greater then update.
static void	setIfLess(AtomicLongMetric m, long update) Update metrics value only if current value if less then update.

Methods inherited from class java.lang.Object

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

Field Detail

SEPARATOR

public static final String SEPARATOR

Metric name part separator.

See Also:

Constant Field Values

INF

public static final String INF

Histogram metric last interval high bound.

See Also:

Constant Field Values

Constructor Detail

MetricUtils

public MetricUtils()

Method Detail

metricName

public static String metricName(String... names)

Builds metric name. Each parameter will separated by '.' char.

Parameters:

names - Metric name parts.

Returns:

Metric name.

fromFullName

public static T2<String,String> fromFullName(String name)

Splits full metric name to registry name and metric name.

Parameters:

name - Full metric name.

Returns:

Array consist of registry name and metric name.

cacheMetricsRegistryName

public static String cacheMetricsRegistryName(String cacheName,
                                              boolean isNear)

Parameters:

cacheName - Cache name.

isNear - Is near flag.

Returns:

Cache metrics registry name.

compareAndSet

public static boolean compareAndSet(AtomicLongMetric m,
                                    long expect,
                                    long update)

Atomically sets the value to the given updated value if the current value == the expected value.

Parameters:

m - Metric.

expect - The expected value.

update - The new value.

Returns:

true if successful. False return indicates that the actual value was not equal to the expected value.

setIfLess

public static void setIfLess(AtomicLongMetric m,
                             long update)

Update metrics value only if current value if less then update.

Parameters:

m - Metric to update.

update - New value.

setIfGreater

public static void setIfGreater(AtomicLongMetric m,
                                long update)

Update metrics value only if current value if greater then update.

Parameters:

m - Metric to update.

update - New value.

histogramBucketNames

public static String[] histogramBucketNames(HistogramMetric metric,
                                            Map<String,T2<long[],String[]>> cache)

Gets histogram bucket names. Example of metric names if bounds are 10,100: histogram_0_10 (less than 10) histogram_10_100 (between 10 and 100) histogram_100_inf (more than 100)

Parameters:

metric - Histogram metric.

cache - Map that caches computed bucket names.

Returns:

Histogram intervals names.