Package org.apache.lucene.util

Class Accountables

java.lang.Object

org.apache.lucene.util.Accountables

public class Accountables
extends Object

Helper methods for constructing nested resource descriptions and debugging RAM usage.

toString(Accountable} can be used to quickly debug the nested structure of any Accountable.

The namedAccountable and namedAccountables methods return type-safe, point-in-time snapshots of the provided resources.

Method Summary

Modifier and Type	Method	Description
static Accountable	namedAccountable(String description, long bytes)	Returns an accountable with the provided description and bytes.
static Accountable	namedAccountable(String description, Collection<Accountable> children, long bytes)	Returns an accountable with the provided description, children and bytes.
static Accountable	namedAccountable(String description, Accountable in)	Augments an existing accountable with the provided description.
static Collection<Accountable>	namedAccountables(String prefix, Map<?,? extends Accountable> in)	Converts a map of resources to a collection.
static String	toString(Accountable a)	Returns a String description of an Accountable and any nested resources.

Methods inherited from class java.lang.Object

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

Method Details

toString

public static String toString(Accountable a)

Returns a String description of an Accountable and any nested resources. This is intended for development and debugging.

namedAccountable

public static Accountable namedAccountable(String description,
 Accountable in)

Augments an existing accountable with the provided description.

The resource description is constructed in this format: description [toString()]

This is a point-in-time type safe view: consumers will not be able to cast or manipulate the resource in any way.

namedAccountable

public static Accountable namedAccountable(String description,
 long bytes)

Returns an accountable with the provided description and bytes.

namedAccountables

public static Collection<Accountable> namedAccountables(String prefix,
 Map<?,? extends Accountable> in)

Converts a map of resources to a collection.

The resource descriptions are constructed in this format: prefix 'key' [toString()]

This is a point-in-time type safe view: consumers will not be able to cast or manipulate the resources in any way.

namedAccountable

public static Accountable namedAccountable(String description,
 Collection<Accountable> children,
 long bytes)

Returns an accountable with the provided description, children and bytes.

The resource descriptions are constructed in this format: description [toString()]

This is a point-in-time type safe view: consumers will not be able to cast or manipulate the resources in any way, provided that the passed in children Accountables (and all their descendants) were created with one of the namedAccountable functions.