Package org.apache.flink.runtime.metrics.scope

Class ScopeFormat

java.lang.Object

org.apache.flink.runtime.metrics.scope.ScopeFormat

Direct Known Subclasses:

JobManagerJobScopeFormat, JobManagerOperatorScopeFormat, JobManagerScopeFormat, OperatorScopeFormat, TaskManagerJobScopeFormat, TaskManagerScopeFormat, TaskScopeFormat

public abstract class ScopeFormat
extends Object

This class represents the format after which the "scope" (or namespace) of the various component metric groups is built. Component metric groups are for example "TaskManager", "Task", or "Operator".

User defined scope formats allow users to include or exclude certain identifiers from the scope. The scope for metrics belonging to the "Task" group could for example include the task attempt number (more fine grained identification), or exclude it (continuity of the namespace across failure and recovery).

Field Summary

Fields

Modifier and Type	Field	Description
static final String	SCOPE_HOST
static final String	SCOPE_INHERIT_PARENT	If the scope format starts with this character, then the parent components scope format will be used as a prefix.
static final String	SCOPE_JOB_ID
static final String	SCOPE_JOB_NAME
static final String	SCOPE_OPERATOR_ID
static final String	SCOPE_OPERATOR_NAME
static final String	SCOPE_SEPARATOR
static final String	SCOPE_TASK_ATTEMPT_ID
static final String	SCOPE_TASK_ATTEMPT_NUM
static final String	SCOPE_TASK_NAME
static final String	SCOPE_TASK_SUBTASK_INDEX
static final String	SCOPE_TASK_VERTEX_ID
static final String	SCOPE_TASKMANAGER_ID

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ScopeFormat(String format, ScopeFormat parent, String[] variables)

Method Summary

Modifier and Type	Method	Description
protected static HashMap<String,Integer>	arrayToMap(String[] array)
static String	asVariable(String scope)	Formats the given string to resemble a scope variable.
protected final String[]	bindVariables(String[] template, String[] values)
static String	concat(org.apache.flink.metrics.CharacterFilter filter, Character delimiter, String... components)	Concatenates the given component names separated by the delimiter character.
protected final String[]	copyTemplate()
String	format()
String	toString()
protected static String	valueOrNull(Object value)

Methods inherited from class java.lang.Object

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

Field Details

SCOPE_INHERIT_PARENT

public static final String SCOPE_INHERIT_PARENT

If the scope format starts with this character, then the parent components scope format will be used as a prefix.

For example, if the TaskManager's job format is "*.<job_name>", and the TaskManager format is "<host>", then the job's metrics will have "<host>.<job_name>" as their scope.

See Also:

• Constant Field Values

SCOPE_SEPARATOR

public static final String SCOPE_SEPARATOR

See Also:

• Constant Field Values

SCOPE_HOST

public static final String SCOPE_HOST

SCOPE_TASKMANAGER_ID

public static final String SCOPE_TASKMANAGER_ID

SCOPE_JOB_ID

public static final String SCOPE_JOB_ID

SCOPE_JOB_NAME

public static final String SCOPE_JOB_NAME

SCOPE_TASK_VERTEX_ID

public static final String SCOPE_TASK_VERTEX_ID

SCOPE_TASK_NAME

public static final String SCOPE_TASK_NAME

SCOPE_TASK_ATTEMPT_ID

public static final String SCOPE_TASK_ATTEMPT_ID

SCOPE_TASK_ATTEMPT_NUM

public static final String SCOPE_TASK_ATTEMPT_NUM

SCOPE_TASK_SUBTASK_INDEX

public static final String SCOPE_TASK_SUBTASK_INDEX

SCOPE_OPERATOR_ID

public static final String SCOPE_OPERATOR_ID

SCOPE_OPERATOR_NAME

public static final String SCOPE_OPERATOR_NAME

Constructor Details

ScopeFormat

protected ScopeFormat(String format,
 ScopeFormat parent,
 String[] variables)

Method Details

format

public String format()

copyTemplate

protected final String[] copyTemplate()

bindVariables

protected final String[] bindVariables(String[] template,
 String[] values)

toString

public String toString()

Overrides:

toString in class Object

asVariable

public static String asVariable(String scope)

Formats the given string to resemble a scope variable.

Parameters:

scope - The string to format

Returns:

The formatted string

concat

public static String concat(org.apache.flink.metrics.CharacterFilter filter,
 Character delimiter,
 String... components)

Concatenates the given component names separated by the delimiter character. Additionally the character filter is applied to all component names.

Parameters:

filter - Character filter to be applied to the component names

delimiter - Delimiter to separate component names

components - Array of component names

Returns:

The concatenated component name

valueOrNull

protected static String valueOrNull(Object value)

arrayToMap

protected static HashMap<String,Integer> arrayToMap(String[] array)