GlobalSearchSession

abstract void close()

Closes the GlobalSearchSession.

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.GLOBAL_SEARCH_SESSION_GET_BY_ID)
abstract @NonNull ListenableFuture<AppSearchBatchResult<String, GenericDocument>> getByDocumentIdAsync(
    @NonNull String packageName,
    @NonNull String databaseName,
    @NonNull GetByDocumentIdRequest request
)

Retrieves GenericDocument documents, belonging to the specified package name and database name and identified by the namespace and ids in the request, from the GlobalSearchSession database. When a call is successful, the result will be returned in the successes section of the AppSearchBatchResult object in the callback. If the package doesn't exist, database doesn't exist, or if the calling package doesn't have access, these failures will be reflected as AppSearchResult objects with a RESULT_NOT_FOUND status code in the failures section of the AppSearchBatchResult object.

abstract @NonNull Features getFeatures()

Returns the Features to check for the availability of certain features for this session.

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.GLOBAL_SEARCH_SESSION_GET_SCHEMA)
abstract @NonNull ListenableFuture<GetSchemaResponse> getSchemaAsync(@NonNull String packageName, @NonNull String databaseName)

Retrieves the collection of schemas most recently successfully provided to setSchemaAsync for any types belonging to the requested package and database that the caller has been granted access to.

If the requested package/database combination does not exist or the caller has not been granted access to it, then an empty GetSchemaResponse will be returned.

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.BLOB_STORAGE)
@ExperimentalAppSearchApi
default @NonNull ListenableFuture<OpenBlobForReadResponse> openBlobForReadAsync(@NonNull Set<AppSearchBlobHandle> handles)

Opens a batch of AppSearch Blobs for reading.

See openBlobForReadAsync for a general description when a blob is open for read.

The returned OpenBlobForReadResponse must be closed after use to avoid resource leaks. Failing to close it will result in system file descriptor exhaustion.

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.GLOBAL_SEARCH_SESSION_REGISTER_OBSERVER_CALLBACK)
abstract void registerObserverCallback(
    @NonNull String targetPackageName,
    @NonNull ObserverSpec spec,
    @NonNull Executor executor,
    @NonNull ObserverCallback observer
)

Adds an ObserverCallback to monitor changes within the databases owned by targetPackageName if they match the given androidx.appsearch.observer.ObserverSpec.

The observer callback is only triggered for data that changes after it is registered. No notification about existing data is sent as a result of registering an observer. To find out about existing data, you must use the search API.

If the data owned by targetPackageName is not visible to you, the registration call will succeed but no notifications will be dispatched. Notifications could start flowing later if targetPackageName changes its schema visibility settings.

If no package matching targetPackageName exists on the system, the registration call will succeed but no notifications will be dispatched. Notifications could start flowing later if targetPackageName is installed and starts indexing data.

This feature may not be available in all implementations. Check GLOBAL_SEARCH_SESSION_REGISTER_OBSERVER_CALLBACK before calling this method.

abstract @NonNull ListenableFuture<Void> reportSystemUsageAsync(@NonNull ReportSystemUsageRequest request)

Reports that a particular document has been used from a system surface.

See reportUsageAsync for a general description of document usage, as well as an API that can be used by the app itself.

Usage reported via this method is accounted separately from usage reported via reportUsageAsync and may be accessed using the constants RANKING_STRATEGY_SYSTEM_USAGE_COUNT and RANKING_STRATEGY_SYSTEM_USAGE_LAST_USED_TIMESTAMP.

abstract @NonNull SearchResults search(@NonNull String queryExpression, @NonNull SearchSpec searchSpec)

Retrieves documents from all AppSearch databases that the querying application has access to.

Applications can be granted access to documents by specifying setSchemaTypeVisibilityForPackage, or setDocumentClassVisibilityForPackage when building a schema.

Document access can also be granted to system UIs by specifying setSchemaTypeDisplayedBySystem, or setDocumentClassDisplayedBySystem when building a schema.

See search for a detailed explanation on forming a query string.

This method is lightweight. The heavy work will be done in getNextPageAsync.

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.GLOBAL_SEARCH_SESSION_REGISTER_OBSERVER_CALLBACK)
abstract void unregisterObserverCallback(
    @NonNull String targetPackageName,
    @NonNull ObserverCallback observer
)

Removes previously registered ObserverCallback instances from the system.

All instances of ObserverCallback which are registered to observe targetPackageName and compare equal to the provided callback using the provided argument's equals will be removed.

If no matching observers have been registered, this method has no effect. If multiple matching observers have been registered, all will be removed.

This feature may not be available in all implementations. Check GLOBAL_SEARCH_SESSION_REGISTER_OBSERVER_CALLBACK before calling this method.