Package 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	Description
static char	HISTOGRAM_NAME_DIVIDER	Histogram name divider.
static String	INF	Histogram metric last interval high bound.
static String	SEPARATOR	Metric name part separator.

Constructor Summary

Constructors

Constructor	Description
MetricUtils()

Method Summary

Modifier and Type	Method	Description
static String	cacheGroupMetricsRegistryName(String cacheOrGroupName)
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 boolean	customMetric(String name)
static String	customName(String name)	Adds GridMetricManager.CUSTOM_METRICS to name.
static T2<String,String>	fromFullName(String name)	Splits full metric name to registry name and metric name.
static String[]	histogramBucketNames(HistogramMetric metric)	Generates histogram bucket names.
static String	metricName(String... names)	Chechs and 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.
static Map<String,Class<?>>	systemViewAttributes(SystemView<?> sysView)	Extract attributes for system view.
static String	toSqlName(String name)	Build SQL-like name from Java code style name.

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

HISTOGRAM_NAME_DIVIDER

public static final char HISTOGRAM_NAME_DIVIDER

Histogram name divider.

See Also:

Constant Field Values

Constructor Detail

MetricUtils

public MetricUtils()

Method Detail

metricName

public static String metricName(String... names)

Chechs and builds metric name.

Parameters:

names - Metric name parts.

Returns:

Metric name.

customMetric

public static boolean customMetric(String name)

Returns:

True if name is or start with the custom metric prefix.

customName

public static String customName(String name)

Adds GridMetricManager.CUSTOM_METRICS to 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.

cacheGroupMetricsRegistryName

public static String cacheGroupMetricsRegistryName(String cacheOrGroupName)

Parameters:

cacheOrGroupName - Cache or group name, depending whether group is implicit or not.

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)

Generates 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

Returns:

Histogram intervals names.

toSqlName

public static String toSqlName(String name)

Build SQL-like name from Java code style name. Some examples: cacheName -> CACHE_NAME. affinitiKeyName -> AFFINITY_KEY_NAME.

Parameters:

name - Name to convert.

Returns:

SQL compatible name.

systemViewAttributes

public static Map<String,Class<?>> systemViewAttributes(SystemView<?> sysView)

Extract attributes for system view.

Parameters:

sysView - System view.

Returns:

Attributes map.