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

  • 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