com.netflix.servo.annotations

Enum DataSourceType

java.lang.Object

java.lang.Enum<DataSourceType>

com.netflix.servo.annotations.DataSourceType

All Implemented Interfaces:

Tag, java.io.Serializable, java.lang.Comparable<DataSourceType>

public enum DataSourceType
extends java.lang.Enum<DataSourceType>
implements Tag

Indicates the type of value that is annotated to determine how it will be measured.

Enum Constant Summary

Enum Constants

Enum Constant and Description
COUNTER A counter is for numeric values that get incremented when some event occurs.
GAUGE A gauge is for numeric values that can be sampled without modification.
INFORMATIONAL An informational attribute is for values that might be useful for debugging, but will not be collected as metrics for monitoring purposes.
NORMALIZED A normalized rate per second.
RATE A rate is for numeric values that represent a rate per second.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	KEY Key name used for the data source type tag, configurable via servo.datasourcetype.key system property.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getKey() Returns the key corresponding to this tag.
java.lang.String	getValue() Returns the value corresponding to this tag.
java.lang.String	tagString() Returns the string representation of this tag.
static DataSourceType	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static DataSourceType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

GAUGE

public static final DataSourceType GAUGE

A gauge is for numeric values that can be sampled without modification. Examples of metrics that should be gauges are things like current temperature, number of open connections, disk usage, etc.

COUNTER

public static final DataSourceType COUNTER

A counter is for numeric values that get incremented when some event occurs. Counters will be sampled and converted into a rate of change per second. Counter values should be monotonically increasing, i.e., the value should not decrease.

RATE

public static final DataSourceType RATE

A rate is for numeric values that represent a rate per second.

NORMALIZED

public static final DataSourceType NORMALIZED

A normalized rate per second. For counters that report values based on step boundaries.

INFORMATIONAL

public static final DataSourceType INFORMATIONAL

An informational attribute is for values that might be useful for debugging, but will not be collected as metrics for monitoring purposes. These values are made available in JMX.

Field Detail

KEY

public static final java.lang.String KEY

Key name used for the data source type tag, configurable via servo.datasourcetype.key system property.

Method Detail

values

public static DataSourceType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (DataSourceType c : DataSourceType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static DataSourceType valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

getKey

public java.lang.String getKey()

Returns the key corresponding to this tag.

Specified by:

getKey in interface Tag

getValue

public java.lang.String getValue()

Returns the value corresponding to this tag.

Specified by:

getValue in interface Tag

tagString

public java.lang.String tagString()

Returns the string representation of this tag.

Specified by:

tagString in interface Tag