org.apache.commons.pool2

枚举 PooledObjectState

java.lang.Object

java.lang.Enum<PooledObjectState>

org.apache.commons.pool2.PooledObjectState

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<PooledObjectState>

public enum PooledObjectState
extends java.lang.Enum<PooledObjectState>

Provides the possible states that a PooledObject may be in.

从以下版本开始:

2.0

枚举常量概要

枚举常量

枚举常量和说明
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.

方法概要

限定符和类型	方法和说明
static PooledObjectState	valueOf(java.lang.String name) 返回带有指定名称的该类型的枚举常量。
static PooledObjectState[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

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

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

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.

方法详细资料

values

public static PooledObjectState[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

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

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

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

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

java.lang.NullPointerException - 如果参数为空值