```
public interface IndexManagerImplementor
```
The object responsible for applying works and searches to a full-text index.
This is the interface implemented by backends and provided to the engine.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`addTo(IndexScopeBuilder builder)`
`IndexIndexer`	`createIndexer(BackendSessionContext sessionContext)`
`IndexIndexingPlan`	`createIndexingPlan(BackendSessionContext sessionContext, DocumentCommitStrategy commitStrategy, DocumentRefreshStrategy refreshStrategy)`
`IndexScopeBuilder`	`createScopeBuilder(BackendMappingContext mappingContext)`
`IndexWorkspace`	`createWorkspace(DetachedBackendSessionContext sessionContext)`
`default void`	`preStart(IndexManagerStartContext context, SavedState savedState)`	Starts a subset of resources that are necessary to operate the index manager at runtime, and are expected to be reused upon restarts.
`CompletableFuture<?>`	`preStop()`	Prepare for `stop()`.
`default SavedState`	`saveForRestart()`
`IndexSchemaManager`	`schemaManager()`
`void`	`start(IndexManagerStartContext context)`	Start any resource necessary to operate the index manager at runtime.
`void`	`stop()`	Stop and release any resource necessary to operate the backend at runtime.
`IndexManager`	`toAPI()`

- Method Detail
  - saveForRestart
```
default SavedState saveForRestart()
```
  - preStart
```
default void preStart(IndexManagerStartContext context,
                      SavedState savedState)
```
    Starts a subset of resources that are necessary to operate the index manager at runtime, and are expected to be reused upon restarts. The resources may be retrieved them from the saved state, or created if they are not present in the saved state.
    Called by the engine once after bootstrap, after BackendImplementor.start(BackendStartContext) was called on the corresponding backend.
    
    Parameters:
    
    context - The start context.
    
    savedState - The saved state returned by the corresponding index manager in the Hibernate Search integration being restarted, or SavedState.empty() on the first start.
  - start
```
void start(IndexManagerStartContext context)
```
    Start any resource necessary to operate the index manager at runtime.
    Called by the engine once just after preStart(IndexManagerStartContext, SavedState).
    
    Parameters:
    
    context - The start context.
  - preStop
```
CompletableFuture<?> preStop()
```
    Prepare for stop().
    
    Returns:
    
    A future that completes when ongoing works complete.
  - stop
```
void stop()
```
    Stop and release any resource necessary to operate the backend at runtime.
    Called by the engine once before shutdown.
  - toAPI
```
IndexManager toAPI()
```
    Returns:
    
    The object that should be exposed as API to users.
  - schemaManager
```
IndexSchemaManager schemaManager()
```
  - createIndexingPlan
```
IndexIndexingPlan createIndexingPlan(BackendSessionContext sessionContext,
                                     DocumentCommitStrategy commitStrategy,
                                     DocumentRefreshStrategy refreshStrategy)
```
  - createIndexer
```
IndexIndexer createIndexer(BackendSessionContext sessionContext)
```
  - createWorkspace
```
IndexWorkspace createWorkspace(DetachedBackendSessionContext sessionContext)
```
  - createScopeBuilder
```
IndexScopeBuilder createScopeBuilder(BackendMappingContext mappingContext)
```
  - addTo
```
void addTo(IndexScopeBuilder builder)
```

Interface IndexManagerImplementor

Method Summary

Method Detail

saveForRestart

preStart

start

preStop

stop

toAPI

schemaManager

createIndexingPlan

createIndexer

createWorkspace

createScopeBuilder

addTo