AbandonedConfig (Apache Tomcat 9.0.37 API Documentation)

org.apache.tomcat.dbcp.pool2.impl

## Class AbandonedConfig

- java.lang.Object
- - org.apache.tomcat.dbcp.pool2.impl.AbandonedConfig

-     public class AbandonedConfig
      extends Object

  Configuration settings for abandoned object removal.
  Since:
    2.0

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbandonedConfig()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `getLogAbandoned()` Flag to log stack traces for application code which abandoned an object.
    `PrintWriter` | `getLogWriter()` Returns the log writer being used by this configuration to log information on abandoned objects.
    `boolean` | `getRemoveAbandonedOnBorrow()` Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when borrowObject is invoked.
    `boolean` | `getRemoveAbandonedOnMaintenance()` Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when pool maintenance (the "evictor") runs.
    `int` | `getRemoveAbandonedTimeout()` Timeout in seconds before an abandoned object can be removed.
    `boolean` | `getRequireFullStackTrace()` Indicates if full stack traces are required when `logAbandoned` is true.
    `boolean` | `getUseUsageTracking()` If the pool implements `UsageTracking`, should the pool record a stack trace every time a method is called on a pooled object and retain the most recent stack trace to aid debugging of abandoned objects?
    `void` | `setLogAbandoned(boolean logAbandoned)` Sets the flag to log stack traces for application code which abandoned an object.
    `void` | `setLogWriter(PrintWriter logWriter)` Sets the log writer to be used by this configuration to log information on abandoned objects.
    `void` | `setRemoveAbandonedOnBorrow(boolean removeAbandonedOnBorrow)` Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when borrowObject is invoked.
    `void` | `setRemoveAbandonedOnMaintenance(boolean removeAbandonedOnMaintenance)` Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when pool maintenance runs.
    `void` | `setRemoveAbandonedTimeout(int removeAbandonedTimeout)` Sets the timeout in seconds before an abandoned object can be removed Setting this property has no effect if `removeAbandonedOnBorrow` and `removeAbandonedOnMaintenance` are both false.
    `void` | `setRequireFullStackTrace(boolean requireFullStackTrace)` Sets the flag to require full stack traces for logging abandoned connections when enabled.
    `void` | `setUseUsageTracking(boolean useUsageTracking)` If the pool implements `UsageTracking`, configure whether the pool should record a stack trace every time a method is called on a pooled object and retain the most recent stack trace to aid debugging of abandoned objects.
    `String` | `toString()`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### AbandonedConfig

          public AbandonedConfig()

  - ### Method Detail

    - #### getRemoveAbandonedOnBorrow

          public boolean getRemoveAbandonedOnBorrow()

      Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when borrowObject is invoked.

      The default value is false.

      If set to true, abandoned objects are removed by borrowObject if there are fewer than 2 idle objects available in the pool and `getNumActive() > getMaxTotal() - 3`

      Returns:
        true if abandoned objects are to be removed by borrowObject

    - #### setRemoveAbandonedOnBorrow

          public void setRemoveAbandonedOnBorrow(boolean removeAbandonedOnBorrow)

      Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when borrowObject is invoked.

      Parameters:
        `removeAbandonedOnBorrow` - true means abandoned objects will be removed by borrowObject
      See Also:
        `getRemoveAbandonedOnBorrow()`

    - #### getRemoveAbandonedOnMaintenance

          public boolean getRemoveAbandonedOnMaintenance()

      Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when pool maintenance (the "evictor") runs.

      The default value is false.

      If set to true, abandoned objects are removed by the pool maintenance thread when it runs. This setting has no effect unless maintenance is enabled by setting `timeBetweenEvictionRunsMillis` to a positive number.

      Returns:
        true if abandoned objects are to be removed by the evictor

    - #### setRemoveAbandonedOnMaintenance

          public void setRemoveAbandonedOnMaintenance(boolean removeAbandonedOnMaintenance)

      Flag to remove abandoned objects if they exceed the removeAbandonedTimeout when pool maintenance runs.

      Parameters:
        `removeAbandonedOnMaintenance` - true means abandoned objects will be removed by pool maintenance
      See Also:
        `getRemoveAbandonedOnMaintenance()`

    - #### getRemoveAbandonedTimeout

          public int getRemoveAbandonedTimeout()

      Timeout in seconds before an abandoned object can be removed.

      The time of most recent use of an object is the maximum (latest) of `TrackedUse.getLastUsed()` (if this class of the object implements TrackedUse) and the time when the object was borrowed from the pool.

      The default value is 300 seconds.

      Returns:
        the abandoned object timeout in seconds

    - #### setRemoveAbandonedTimeout

          public void setRemoveAbandonedTimeout(int removeAbandonedTimeout)

      Sets the timeout in seconds before an abandoned object can be removed

      Setting this property has no effect if `removeAbandonedOnBorrow` and `removeAbandonedOnMaintenance` are both false.

      Parameters:
        `removeAbandonedTimeout` - new abandoned timeout in seconds
      See Also:
        `getRemoveAbandonedTimeout()`

    - #### getLogAbandoned

          public boolean getLogAbandoned()

      Flag to log stack traces for application code which abandoned an object. Defaults to false. Logging of abandoned objects adds overhead for every object created because a stack trace has to be generated.
      Returns:
        boolean true if stack trace logging is turned on for abandoned objects

    - #### setLogAbandoned

          public void setLogAbandoned(boolean logAbandoned)

      Sets the flag to log stack traces for application code which abandoned an object.
      Parameters:
        `logAbandoned` - true turns on abandoned stack trace logging
      See Also:
        `getLogAbandoned()`

    - #### getRequireFullStackTrace

          public boolean getRequireFullStackTrace()

      Indicates if full stack traces are required when `logAbandoned` is true. Defaults to true. Logging of abandoned objects requiring a full stack trace will generate an entire stack trace to generate for every object created. If this is disabled, a faster but less informative stack walking mechanism may be used if available.
      Returns:
        true if full stack traces are required for logging abandoned connections, or false if abbreviated stack traces are acceptable
      Since:
        2.5
      See Also:
        `CallStack`

    - #### setRequireFullStackTrace

          public void setRequireFullStackTrace(boolean requireFullStackTrace)

      Sets the flag to require full stack traces for logging abandoned connections when enabled.
      Parameters:
        `requireFullStackTrace` - indicates whether or not full stack traces are required in abandoned connection logs
      Since:
        2.5
      See Also:
        `CallStack`, `getRequireFullStackTrace()`

    - #### getLogWriter

          public PrintWriter getLogWriter()

      Returns the log writer being used by this configuration to log information on abandoned objects. If not set, a PrintWriter based on System.out with the system default encoding is used.
      Returns:
        log writer in use

    - #### setLogWriter

          public void setLogWriter(PrintWriter logWriter)

      Sets the log writer to be used by this configuration to log information on abandoned objects.
      Parameters:
        `logWriter` - The new log writer

    - #### getUseUsageTracking

          public boolean getUseUsageTracking()

      If the pool implements `UsageTracking`, should the pool record a stack trace every time a method is called on a pooled object and retain the most recent stack trace to aid debugging of abandoned objects?
      Returns:
        `true` if usage tracking is enabled

    - #### setUseUsageTracking

          public void setUseUsageTracking(boolean useUsageTracking)

      If the pool implements `UsageTracking`, configure whether the pool should record a stack trace every time a method is called on a pooled object and retain the most recent stack trace to aid debugging of abandoned objects.
      Parameters:
        `useUsageTracking` - A value of `true` will enable the recording of a stack trace on every use of a pooled object

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`
      Since:
        2.4.3

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