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## org.modeshape.graph.search
Class AbstractSearchEngine<WorkspaceType extends SearchEngineWorkspace,ProcessorType extends SearchEngineProcessor>

    java.lang.Object
      org.modeshape.graph.search.AbstractSearchEngine<WorkspaceType,ProcessorType>

Type Parameters:
  `WorkspaceType` - the workspace type
  `ProcessorType` - the processor type

All Implemented Interfaces:
  SearchEngine

    @ThreadSafe
    public abstract class AbstractSearchEngine<WorkspaceType extends SearchEngineWorkspace,ProcessorType extends SearchEngineProcessor>

extends Object
implements 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.

Nested Class Summary
`protected class` | `AbstractSearchEngine.SearchWorkspaces`
`static interface` | `AbstractSearchEngine.Workspaces<WorkspaceType extends SearchEngineWorkspace>`

Field Summary
`static boolean` | `DEFAULT_VERIFY_WORKSPACE_IN_SOURCE`

Constructor Summary
`protected` | `AbstractSearchEngine(String sourceName, RepositoryConnectionFactory connectionFactory)` Create a new provider instance that can be used to manage the indexes for the workspaces in a single source.
`protected` | `AbstractSearchEngine(String sourceName, RepositoryConnectionFactory connectionFactory, boolean verifyWorkspaceInSource)` Create a new provider instance that can be used to manage the indexes for the workspaces in a single source.

Method Summary
`protected abstract ProcessorType` | `createProcessor(ExecutionContext context, AbstractSearchEngine.Workspaces<WorkspaceType> workspaces, Observer observer, boolean readOnly)` Create the `SearchEngineProcessor` implementation that can be used to operate against the `SearchEngineWorkspace` instances.
`SearchEngineProcessor` | `createProcessor(ExecutionContext context, Observer observer, boolean readOnly)` Create the `SearchEngineProcessor` implementation that can be used to operate against the `SearchEngineWorkspace` instances.
`protected abstract WorkspaceType` | `createWorkspace(ExecutionContext context, String workspaceName)` Create the index(es) required for the named workspace.
`protected RepositoryConnectionFactory` | `getConnectionFactory()`
`String` | `getSourceName()` Get the name of the source that can be searched with an engine that uses this provider.
`protected Graph` | `graph(ExecutionContext context)` Obtain a graph to the source for which this engine exists.
`boolean` | `isVerifyWorkspaceInSource()` Determine whether the workspaces should be verified with the original source before creating indexes for them.

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

Methods inherited from interface org.modeshape.graph.search.SearchEngine
`index, indexExists`

Field Detail

### DEFAULT_VERIFY_WORKSPACE_IN_SOURCE

    public static final boolean DEFAULT_VERIFY_WORKSPACE_IN_SOURCE

See Also:
  Constant Field Values

Constructor Detail

### AbstractSearchEngine

    protected AbstractSearchEngine(String sourceName,
                                   RepositoryConnectionFactory connectionFactory)

  Create a new provider instance that can be used to manage the indexes for the workspaces in a single source.

  Parameters:
    `sourceName` - the name of the source that can be searched; never null
    `connectionFactory` - the connection factory; may be null if the engine can operate without connecting to the source

### AbstractSearchEngine

    protected AbstractSearchEngine(String sourceName,
                                   RepositoryConnectionFactory connectionFactory,
                                   boolean verifyWorkspaceInSource)

  Create a new provider instance that can be used to manage the indexes for the workspaces in a single source.

  Parameters:
    `sourceName` - the name of the source that can be searched; never null
    `connectionFactory` - the connection factory; may be null if the engine can operate without connecting to the source
    `verifyWorkspaceInSource` - true if the workspaces are to be verified by checking the original source
  Throws:
    `IllegalArgumentException` - if any of the parameters are null

Method Detail

### getConnectionFactory

    protected RepositoryConnectionFactory getConnectionFactory()

  Returns:
    connectionFactory

### getSourceName

    public String getSourceName()

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

  Specified by:
    `getSourceName` in interface `SearchEngine`
  Returns:
    the name of the source that is to be searchable; never null
  See Also:
    `SearchEngine.getSourceName()`

### isVerifyWorkspaceInSource

    public boolean isVerifyWorkspaceInSource()

  Determine whether the workspaces should be verified with the original source before creating indexes for them.

  Returns:
    true if verification should be performed, or false otherwise

### graph

    protected Graph graph(ExecutionContext context)

  Obtain a graph to the source for which this engine exists.

  Parameters:
    `context` - the context in which the graph operations should be performed; never null
  Returns:
    the graph; never null
  Throws:
    `RepositorySourceException` - if a connection to the source cannot be established

### createWorkspace

    protected abstract WorkspaceType createWorkspace(ExecutionContext context,
                                                     String workspaceName)
                                                                            throws SearchEngineException

  Create the index(es) required for the named workspace.

  Parameters:
    `context` - the context in which the operation is to be performed; may not be null
    `workspaceName` - the name of the workspace; may not be null
  Returns:
    the workspace; never null
  Throws:
    `SearchEngineException` - if there is a problem creating the workspace.

### createProcessor

    protected abstract ProcessorType createProcessor(ExecutionContext context,
                                                     AbstractSearchEngine.Workspaces<WorkspaceType> workspaces,
                                                     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
    `workspaces` - the set of existing search workspaces; 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

### createProcessor

    public 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.

  Specified by:
    `createProcessor` in interface `SearchEngine`
  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
  See Also:
    `SearchEngine.createProcessor(org.modeshape.graph.ExecutionContext, org.modeshape.graph.observe.Observer, boolean)`

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