Package org.apache.tomcat.dbcp.pool2

Enum PooledObjectState

java.lang.Object

java.lang.Enum<PooledObjectState>

org.apache.tomcat.dbcp.pool2.PooledObjectState

All Implemented Interfaces:

Serializable, Comparable<PooledObjectState>, java.lang.constant.Constable

public enum PooledObjectState
extends Enum<PooledObjectState>

Provides all possible states of a PooledObject.

Since:

2.0

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ABANDONED	Deemed abandoned, to be invalidated.
ALLOCATED	In use.
EVICTION	In the queue, currently being tested for possible eviction.
EVICTION_RETURN_TO_HEAD	Not in the queue, currently being tested for possible eviction.
IDLE	In the queue, not in use.
INVALID	Failed maintenance (e.g. eviction test or validation) and will be / has been destroyed
RETURNING	Returning to the pool.
VALIDATION	In the queue, currently being validated.
VALIDATION_PREALLOCATED	Not in queue, currently being validated.
VALIDATION_RETURN_TO_HEAD	Not in queue, currently being validated.

Method Summary

Modifier and Type	Method	Description
static PooledObjectState	valueOf(String name)	Returns the enum constant of this type with the specified name.
static PooledObjectState[]	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, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

IDLE

public static final PooledObjectState IDLE

In the queue, not in use.

ALLOCATED

public static final PooledObjectState ALLOCATED

In use.

EVICTION

public static final PooledObjectState EVICTION

In the queue, currently being tested for possible eviction.

EVICTION_RETURN_TO_HEAD

public static final PooledObjectState EVICTION_RETURN_TO_HEAD

Not in the queue, currently being tested for possible eviction. An attempt to borrow the object was made while being tested which removed it from the queue. It should be returned to the head of the queue once eviction testing completes.

TODO: Consider allocating object and ignoring the result of the eviction test.

VALIDATION

public static final PooledObjectState VALIDATION

In the queue, currently being validated.

VALIDATION_PREALLOCATED

public static final PooledObjectState VALIDATION_PREALLOCATED

Not in queue, currently being validated. The object was borrowed while being validated and since testOnBorrow was configured, it was removed from the queue and pre-allocated. It should be allocated once validation completes.

VALIDATION_RETURN_TO_HEAD

public static final PooledObjectState VALIDATION_RETURN_TO_HEAD

Not in queue, currently being validated. An attempt to borrow the object was made while previously being tested for eviction which removed it from the queue. It should be returned to the head of the queue once validation completes.

INVALID

public static final PooledObjectState INVALID

Failed maintenance (e.g. eviction test or validation) and will be / has been destroyed

ABANDONED

public static final PooledObjectState ABANDONED

Deemed abandoned, to be invalidated.

RETURNING

public static final PooledObjectState RETURNING

Returning to the pool.

Method Details

values

public static PooledObjectState[] values()

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

Returns:

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

valueOf

public static PooledObjectState valueOf(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:

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

NullPointerException - if the argument is null