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## org.modeshape.graph.search
Interface SearchEngine

All Known Implementing Classes:
  AbstractLuceneSearchEngine, AbstractSearchEngine, LuceneSearchEngine

    @ThreadSafe
    public interface SearchEngine

A component that acts as a search engine for the content within a single `RepositorySource`. This engine manages a set of indexes and provides search functionality for each of the workspaces within the source, and provides various methods to (re)index the content contained with source's workspaces and keep the indexes up-to-date via changes.

Method Summary
`SearchEngineProcessor` | `createProcessor(ExecutionContext context, Observer observer, boolean readOnly)` Create the `SearchEngineProcessor` implementation that can be used to operate against the `SearchEngineWorkspace` instances.
`String` | `getSourceName()` Get the name of the source that can be searched with an engine that uses this provider.
`void` | `index(ExecutionContext context, Iterable<ChangeRequest> changes)` Update the indexes with the supplied set of changes to the content.
`boolean` | `indexExists(String workspaceName)`

Method Detail

### getSourceName

    String getSourceName()

  Get the name of the source that can be searched with an engine that uses this provider.

  Returns:
    the name of the source that is to be searchable; never null

### createProcessor

    SearchEngineProcessor createProcessor(ExecutionContext context,
                                          Observer observer,
                                          boolean readOnly)

  Create the `SearchEngineProcessor` implementation that can be used to operate against the `SearchEngineWorkspace` instances.

  Note that the resulting processor must be `closed` by the caller when completed.

  Parameters:
    `context` - the context in which the processor is to be used; never null
    `observer` - the observer of any events created by the processor; may be null
    `readOnly` - true if the processor will only be reading or searching, or false if the processor will be used to update the workspaces
  Returns:
    the processor; may not be null

### index

    void index(ExecutionContext context,
               Iterable<ChangeRequest> changes)
               throws SearchEngineException

  Update the indexes with the supplied set of changes to the content.

  Parameters:
    `context` - the execution context for which this session is to be established; may not be null
    `changes` - the set of changes to the content
  Throws:
    `IllegalArgumentException` - if the path is null
    `RepositorySourceException` - if there is a problem accessing the content
    `SearchEngineException` - if there is a problem updating the indexes

### indexExists

    boolean indexExists(String workspaceName)
                        throws SearchEngineException

  Throws:
    `SearchEngineException`

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