Package com.atlassian.confluence.search.v2

Interface SearchIndexAccessor

All Known Implementing Classes:

DelegatingSearchIndexAccessor, EdgeSearchIndexAccessor, LuceneSearchIndexAccessor

@ThreadSafe
public interface SearchIndexAccessor

An V2 interface which provides the following thread-safe actions on a search index:

• Searching by search(ISearch, Set), scan(SearchQuery, Set, Consumer)
• Writing by execute(SearchIndexAction)
• Transactional execution of searches and writes via withBatchUpdate(BatchUpdateAction)
• Resets via reset(Runnable)
• Snapshotting via reset(Runnable)

To hook into core search indexes behaviour (content and change index), inject the exposed beans via Spring. To create custom ones use CustomSearchIndexRegistry or extend DelegatingSearchIndexAccessor.

WARNING: there is no default permissions checking behaviour provided. You MUST provide a search which specifies permissions checking. See SiteSearchPermissionsQueryFactory to add one yourself. See PredefinedSearchBuilder to build a pre-defined search which contains permission checking.

Since:

7.16

See Also:

CustomSearchIndexRegistry, DelegatingSearchIndexAccessor, SearchManager, SiteSearchPermissionsQueryFactory, PredefinedSearchBuilder

Method Summary

Modifier and Type	Method	Description
void	execute(SearchIndexAction action)	Executes a SearchIndexAction on the underlying search index.
int	numDocs()	Get the total number of index documents for the underlying search index
void	reset(Runnable replaceIndex)	Execute a method after the index has been closed and before the index has been reopened
long	scan(SearchQuery searchQuery, Set<String> requestedFields, Consumer<ScannedDocument> consumer, float defaultScore)	Scans the index for documents that match the provided searchQuery.
long	scan(SearchQuery searchQuery, Set<String> requestedFields, Consumer<Map<String,String[]>> consumer)	Scans the index for documents that match the provided searchQuery.
SearchResults	search(ISearch search, Set<String> requestedFields)	Perform a search, the returned SearchResults only have the fields requested in the projection filled out, no other fields are valid in the searchResult.
void	snapshot(File destinationDirectory)	Take a snapshot of the current index and store it into the destination directory
void	withBatchUpdate(BatchUpdateAction batchUpdateAction)	Execute the update action in a batch.

Method Detail

search

SearchResults search(ISearch search,
                     Set<String> requestedFields)
              throws InvalidSearchException

Perform a search, the returned SearchResults only have the fields requested in the projection filled out, no other fields are valid in the searchResult.

SearchResults will throw an FieldNotRequestedException if an attempt is made to access a field value that has not had it's key included in the projection Set.

NOTE: the search limit will be capped at SearchConstants.MAX_LIMIT and the startOffset will be capped at SearchConstants.MAX_START_OFFSET for more efficient heap usage. See SearchResults.getNextPageSearch() for pagination.

WARNING: there is no default permissions checking behaviour provided. You MUST provide a search which specifies permissions checking. See SiteSearchPermissionsQueryFactory to add one yourself. See PredefinedSearchBuilder to build a pre-defined search which contains permission checking.

Parameters:

search - the search to perform.

requestedFields - requested fields. Passing null will request all fields, and passing empty set will request none.

Throws:

InvalidSearchException - if some error occurred converting the search object into * a search that could be performed in the back-end. Usually this is a sign that some plugin that was * used to create the search is no longer available.

See Also:

ISearch, SiteSearchPermissionsQueryFactory, SearchConstants.MAX_LIMIT, SearchConstants.MAX_START_OFFSET, SearchResults.getNextPageSearch(), PredefinedSearchBuilder

scan

long scan(SearchQuery searchQuery,
          Set<String> requestedFields,
          Consumer<Map<String,String[]>> consumer)

Scans the index for documents that match the provided searchQuery. The requestedFields set is used to specify which values need to be returned. The consumer will collect all the results found by the scan.

Note that it is possible for a document to match the query, but not have any of the requested fields. This will result in an empty String[] for those fields that don't exist on the document. If you don't want to return those documents, you should specify a consumer that filters these out.

WARNING: there is no default permissions checking behaviour provided. You MUST provide a search which specifies permissions checking. See SiteSearchPermissionsQueryFactory to add one yourself. See PredefinedSearchBuilder to build a pre-defined search which contains permission checking.

Parameters:

searchQuery - SearchQuery to scan the index for.

requestedFields - Set of field names that are requested from the index. Any fields provided here that is not on the document will return an empty String[] Passing null will request all fields, and passing empty set will request none.

consumer - Consumer that handles each found document.

Returns:

the number of documents that matched the searchQuery.

Throws:

SearchIndexAccessException - if there is an IO error.

See Also:

SiteSearchPermissionsQueryFactory, PredefinedSearchBuilder

scan

long scan(SearchQuery searchQuery,
          Set<String> requestedFields,
          Consumer<ScannedDocument> consumer,
          float defaultScore)

Scans the index for documents that match the provided searchQuery. The requestedFields set is used to specify which values need to be returned. The consumer will collect all the results found by the scan and convert them into ScannedDocument, which contains a score (if scoreIncluded is true) and a field-value map of the requested fields.

Note that it is possible for a document to match the query, but not have any of the requested fields as the other scan method.

This will result in an empty String[] for those fields that don't exist on the document. If you don't want to return those documents, you should specify a consumer that filters these out.

WARNING: there is no default permissions checking behaviour provided. You MUST provide a search which specifies permissions checking. See SiteSearchPermissionsQueryFactory to add one yourself. See PredefinedSearchBuilder to build a pre-defined search which contains permission checking.

Parameters:

searchQuery - SearchQuery to scan the index for.

requestedFields - Set of field names that are requested from the index. Any fields provided here that is not on the document will return an empty String[] Passing null will request all fields, and passing empty set will request none.

consumer - Consumer that handles each found document.

defaultScore - a default score to be included in the ScannedDocument if it is not possible to retrieve the score for the document.

Returns:

the number of documents that matched the searchQuery.

Throws:

SearchIndexAccessException - if there is an IO error.

See Also:

SiteSearchPermissionsQueryFactory, PredefinedSearchBuilder

execute

void execute(SearchIndexAction action)
      throws SearchIndexAccessException

Executes a SearchIndexAction on the underlying search index.

Parameters:

action - SearchIndexAction

Throws:

SearchIndexAccessException - if there is an io error.

numDocs

int numDocs()
     throws SearchIndexAccessException

Get the total number of index documents for the underlying search index

Returns:

the total number of index documents

Throws:

SearchIndexAccessException

withBatchUpdate

void withBatchUpdate(BatchUpdateAction batchUpdateAction)

Execute the update action in a batch. Executions are transactional, reads can't see any writes made and the index will be locked for updating by other threads. Currently, there is no rollback when the transaction fails for any reason. This is a bug which will be investigated in future.

Parameters:

batchUpdateAction - the batch update action

snapshot

void snapshot(File destinationDirectory)
       throws SearchIndexAccessException

Take a snapshot of the current index and store it into the destination directory

Parameters:

destinationDirectory - the destination directory

Throws:

SearchIndexAccessException - if the snapshot could not be taken

UnsupportedOperationException - when using a SearchIndexAccessor for the main or change indexes.

Since:

7.16

reset

void reset(Runnable replaceIndex)

Execute a method after the index has been closed and before the index has been reopened

Parameters:

replaceIndex - the method that needs to be executed