SearchTravRetHighlightTask (Lucene 2.4.1 API)
Keywords: org.apache.lucene.benchmark.byTask.tasks.SearchTravRetHighlightTask class

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

    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.SearchTravRetHighlightTask

All Implemented Interfaces:
  Cloneable

    public class SearchTravRetHighlightTask

extends SearchTravTask

Search and Traverse and Retrieve docs task. Highlight the fields in the retrieved documents. Uses the `SimpleHTMLFormatter` for formatting.

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 multivalued, comma separated param string as: size[<traversal size>],highlight[<int>],maxFrags[<int>],mergeContiguous[<boolean>],fields[name1;name2;...]

- traversal size - The number of hits to traverse, otherwise all will be traversed
- highlight - The number of the hits to highlight. Will always be less than or equal to traversal size. Default is Integer.MAX_VALUE (i.e. hits.length())
- maxFrags - The maximum number of fragments to score by the highlighter
- mergeContiguous - true if contiguous fragments should be merged.
- fields - The fields to highlight. If not specified all fields will be highlighted (or at least attempted)

Example:

    "SearchHlgtSameRdr" SearchTravRetHighlight(size[10],highlight[10],mergeContiguous[true],maxFrags[3],fields[body]) > : 1000

Documents must be stored in order for this task to work. Additionally, term vector positions can be used as well.

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

Field Summary
`protected int` | `maxFrags`
`protected boolean` | `mergeContiguous`
`protected int` | `numToHighlight`
`protected Set` | `paramFields`

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

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

Constructor Summary
`SearchTravRetHighlightTask(PerfRunData runData)`

Method Summary
`protected Collection` | `getFieldsToHighlight(Document document)` Define the fields to highlight.
`boolean` | `isMergeContiguousFragments()`
`int` | `maxNumFragments()`
`int` | `numToHighlight()` Set to the number of documents to highlight.
`void` | `setParams(String params)` Set the params of this task.
`void` | `setup()` Task setup work that should not be measured for that specific task.
`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, supportsParams, traversalSize, withSearch, withTraverse, withWarm`

Methods inherited from class org.apache.lucene.benchmark.byTask.tasks.ReadTask
`doHighlight, doLogic, getHighlighter, getSort, retrieveDoc`

Methods inherited from class org.apache.lucene.benchmark.byTask.tasks.PerfTask
`clone, getDepth, getName, getParams, getRunData, isDisableCounting, runAndMaybeStats, setDepth, setDisableCounting, setName, shouldNeverLogAtStart, shouldNotRecordStats, tearDown, toString`

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

Field Detail

### numToHighlight

    protected int numToHighlight

### mergeContiguous

    protected boolean mergeContiguous

### maxFrags

    protected int maxFrags

### paramFields

    protected Set paramFields

Constructor Detail

### SearchTravRetHighlightTask

    public SearchTravRetHighlightTask(PerfRunData runData)

Method Detail

### setup

    public void setup()
               throws Exception

  Description copied from class: `PerfTask`
  Task setup work that should not be measured for that specific task. By default it does nothing, but tasks can implement this, moving work from doLogic() to this method. Only the work done in doLogicis measured for this task. Notice that higher level (sequence) tasks containing this task would then measure larger time than the sum of their contained tasks.

  Overrides:
    `setup` in class `PerfTask`
  Throws:
    `Exception`

### 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`

### numToHighlight

    public int numToHighlight()

  Description copied from class: `ReadTask`
  Set to the number of documents to highlight.

  Overrides:
    `numToHighlight` in class `ReadTask`
  Returns:
    The number of the results to highlight. O means no docs will be highlighted.

### isMergeContiguousFragments

    public boolean isMergeContiguousFragments()

  Overrides:
    `isMergeContiguousFragments` in class `ReadTask`
  Returns:
    true if the highlighter should merge contiguous fragments

### maxNumFragments

    public int maxNumFragments()

  Overrides:
    `maxNumFragments` in class `ReadTask`
  Returns:
    the maxiumum number of highlighter fragments

### getFieldsToHighlight

    protected Collection getFieldsToHighlight(Document document)

  Description copied from class: `ReadTask`
  Define the fields to highlight. Base implementation returns all fields

  Overrides:
    `getFieldsToHighlight` in class `ReadTask`
  Parameters:
    `document` - The Document
  Returns:
    A Collection of Field names (Strings)

### setParams

    public void setParams(String params)

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

  Overrides:
    `setParams` in class `SearchTravTask`

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