Package org.apache.lucene.benchmark.byTask.tasks

# Class OpenIndexTask

java.lang.Object
org.apache.lucene.benchmark.byTask.tasks.PerfTask
org.apache.lucene.benchmark.byTask.tasks.OpenIndexTask

All Implemented Interfaces:
  `Cloneable`

public class OpenIndexTask extends PerfTask
Open an index writer.
Other side effects: index writer object in perfRunData is set.
Relevant properties: `merge.factor, max.buffered, max.field.length, ram.flush.mb [default 0]`.

Accepts a param specifying the commit point as previously saved with CommitIndexTask. If you specify this, it rolls the index back to that commit on opening the IndexWriter.

## Field Summary

Fields
Modifier and Type
Field
Description
`static final int`
`DEFAULT_MAX_BUFFERED`
`static final int`
`DEFAULT_MERGE_PFACTOR`
`static final double`
`DEFAULT_RAM_FLUSH_MB`

### Fields inherited from class org.apache.lucene.benchmark.byTask.tasks.PerfTask

`logStep, NEW_LINE, params, stopNow`

## Constructor Summary

Constructors
Constructor
Description
`OpenIndexTask(PerfRunData runData)`

## Method Summary

Modifier and Type
Method
Description
`int`
`doLogic()`
Perform the task once (ignoring repetitions specification) Return number of work items done by this task.
`void`
`setParams(String params)`
Set the params of this task.
`boolean`
`supportsParams()`
Sub classes that support parameters must override this method to return true.

### Methods inherited from class org.apache.lucene.benchmark.byTask.tasks.PerfTask

`clone, close, getAlgLineNum, getBackgroundDeltaPriority, getDepth, getLogMessage, getName, getParams, getRunData, getRunInBackground, isDisableCounting, runAndMaybeStats, setAlgLineNum, setDepth, setDisableCounting, setName, setRunInBackground, setup, shouldNeverLogAtStart, shouldNotRecordStats, stopNow, tearDown, toString`

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

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

## Field Details

### DEFAULT_MAX_BUFFERED

public static final int DEFAULT_MAX_BUFFERED

See Also:
  - Constant Field Values

### DEFAULT_MERGE_PFACTOR

public static final int DEFAULT_MERGE_PFACTOR

See Also:
  - Constant Field Values

### DEFAULT_RAM_FLUSH_MB

public static final double DEFAULT_RAM_FLUSH_MB

See Also:
  - Constant Field Values

## Constructor Details

### OpenIndexTask

public OpenIndexTask(PerfRunData runData)

## Method Details

### doLogic

public int doLogic() throws IOException
Description copied from class: `PerfTask`
Perform the task once (ignoring repetitions specification) Return number of work items done by this task. For indexing that can be number of docs added. For warming that can be number of scanned items, etc.

Specified by:
  `doLogic` in class `PerfTask`
Returns:
  number of work items done by this task.
Throws:
  `IOException`

### setParams

public void setParams(String params)
Description copied from class: `PerfTask`
Set the params of this task.

Overrides:
  `setParams` in class `PerfTask`

### supportsParams

public boolean supportsParams()
Description copied from class: `PerfTask`
Sub classes that support parameters must override this method to return true.

Overrides:
  `supportsParams` in class `PerfTask`
Returns:
  true iff this task supports command line params.