org.apache.lucene.index

## Class QueryTimeoutImpl

- java.lang.Object
- - org.apache.lucene.index.QueryTimeoutImpl

- All Implemented Interfaces:
    QueryTimeout

      public class QueryTimeoutImpl
      extends Object
      implements QueryTimeout

  An implementation of `QueryTimeout` that can be used by the `ExitableDirectoryReader` class to time out and exit out when a query takes a long time to rewrite.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `QueryTimeoutImpl(long timeAllowed)` Sets the time at which to time out by adding the given timeAllowed to the current time.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Long` | `getTimeoutAt()` Returns time at which to time out, in nanoseconds relative to the (JVM-specific) epoch for `System.nanoTime()`, to compare with the value returned by `nanoTime()`.
    `void` | `reset()` Reset the timeout value.
    `boolean` | `shouldExit()` Return true if `reset()` has not been called and the elapsed time has exceeded the time allowed.
    `String` | `toString()`

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

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

- - ### Constructor Detail

    - #### QueryTimeoutImpl

          public QueryTimeoutImpl(long timeAllowed)

      Sets the time at which to time out by adding the given timeAllowed to the current time.
      Parameters:
        `timeAllowed` - Number of milliseconds after which to time out. Use `Long.MAX_VALUE` to effectively never time out.

  - ### Method Detail

    - #### getTimeoutAt

          public Long getTimeoutAt()

      Returns time at which to time out, in nanoseconds relative to the (JVM-specific) epoch for `System.nanoTime()`, to compare with the value returned by `nanoTime()`.

    - #### shouldExit

          public boolean shouldExit()

      Return true if `reset()` has not been called and the elapsed time has exceeded the time allowed.
      Specified by:
        `shouldExit` in interface `QueryTimeout`

    - #### reset

          public void reset()

      Reset the timeout value.

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

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