## org.apache.lucene.benchmark.byTask.tasks
Class SearchTravRetLoadFieldSelectorTask

    java.lang.Object
      org.apache.lucene.benchmark.byTask.tasks.PerfTask
          org.apache.lucene.benchmark.byTask.tasks.ReadTask
              org.apache.lucene.benchmark.byTask.tasks.SearchTravTask
                  org.apache.lucene.benchmark.byTask.tasks.SearchTravRetLoadFieldSelectorTask

All Implemented Interfaces:
  Cloneable

    public class SearchTravRetLoadFieldSelectorTask

extends SearchTravTask

Search and Traverse and Retrieve docs task using a FieldVisitor loading only the requested fields.

Note: This task reuses the reader if it is already open. Otherwise a reader is opened at start and closed at the end.

Takes optional param: comma separated list of Fields to load.

Other side effects: counts additional 1 (record) for each traversed hit, and 1 more for each retrieved (non null) document.

Field Summary
`protected Set<String>` `fieldsToLoad`

Fields inherited from class org.apache.lucene.benchmark.byTask.tasks.SearchTravTask
`traversalSize`

Fields inherited from class org.apache.lucene.benchmark.byTask.tasks.PerfTask
`logStep, NEW_LINE, params, stopNow`

Constructor Summary
`SearchTravRetLoadFieldSelectorTask(PerfRunData runData)`

Method Summary
`protected Document` `retrieveDoc(IndexReader ir, int id)`
`void` `setParams(String params)` Set the params of this task.
`boolean` `supportsParams()` Sub classes that support parameters must override this method to return true.
`boolean` `withRetrieve()` Return true if, with search & results traversing, docs should be retrieved.

Methods inherited from class org.apache.lucene.benchmark.byTask.tasks.SearchTravTask
`getQueryMaker, traversalSize, withSearch, withTraverse, withWarm`

Methods inherited from class org.apache.lucene.benchmark.byTask.tasks.ReadTask
`createCollector, doLogic, getBenchmarkHighlighter, getFieldsToHighlight, getSort, numHits, numToHighlight, setup, withCollector, withMaxScore, withScore`

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, shouldNeverLogAtStart, shouldNotRecordStats, stopNow, tearDown, toString`

Methods inherited from class java.lang.Object
`equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### fieldsToLoad

    protected Set<String> fieldsToLoad

Constructor Detail

### SearchTravRetLoadFieldSelectorTask

    public SearchTravRetLoadFieldSelectorTask(PerfRunData runData)

Method Detail

### withRetrieve

    public boolean withRetrieve()

  Description copied from class: `ReadTask`
  Return true if, with search & results traversing, docs should be retrieved.

  Overrides:
    `withRetrieve` in class `SearchTravTask`

### retrieveDoc

    protected Document retrieveDoc(IndexReader ir,
                                   int id)
                            throws IOException

  Overrides:
    `retrieveDoc` in class `ReadTask`
  Throws:
    `IOException`

### setParams

    public void setParams(String params)

  Description copied from class: `PerfTask`
  Set the params of this task.

  Overrides:
    `setParams` in class `SearchTravTask`

### 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 `SearchTravTask`
  Returns:
    true iff this task supports command line params.

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