[android-components](../../index.md) / [mozilla.components.browser.storage.memory](../index.md) / [InMemoryHistoryStorage](./index.md)

# InMemoryHistoryStorage

`class InMemoryHistoryStorage : `[`HistoryStorage`](../../mozilla.components.concept.storage/-history-storage/index.md) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/browser/storage-memory/src/main/java/mozilla/components/browser/storage/memory/InMemoryHistoryStorage.kt#L28)

An in-memory implementation of [mozilla.components.concept.storage.HistoryStorage](../../mozilla.components.concept.storage/-history-storage/index.md).

### Constructors

| Name | Summary |
|---|---|
| [&lt;init&gt;](-init-.md) | `InMemoryHistoryStorage()`<br>An in-memory implementation of [mozilla.components.concept.storage.HistoryStorage](../../mozilla.components.concept.storage/-history-storage/index.md). |

### Functions

| Name | Summary |
|---|---|
| [cleanup](cleanup.md) | `fun cleanup(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Cleans up background work and database connections |
| [deleteEverything](delete-everything.md) | `suspend fun deleteEverything(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Remove all locally stored data. |
| [deleteVisit](delete-visit.md) | `suspend fun deleteVisit(url: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`, timestamp: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Remove a specific visit for a given [url](../../mozilla.components.concept.storage/-history-storage/delete-visit.md#mozilla.components.concept.storage.HistoryStorage$deleteVisit(kotlin.String, kotlin.Long)/url). |
| [deleteVisitsBetween](delete-visits-between.md) | `suspend fun deleteVisitsBetween(startTime: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`, endTime: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Remove history visits in an inclusive range from [startTime](../../mozilla.components.concept.storage/-history-storage/delete-visits-between.md#mozilla.components.concept.storage.HistoryStorage$deleteVisitsBetween(kotlin.Long, kotlin.Long)/startTime) to [endTime](../../mozilla.components.concept.storage/-history-storage/delete-visits-between.md#mozilla.components.concept.storage.HistoryStorage$deleteVisitsBetween(kotlin.Long, kotlin.Long)/endTime). |
| [deleteVisitsFor](delete-visits-for.md) | `suspend fun deleteVisitsFor(url: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Remove all history visits for a given [url](../../mozilla.components.concept.storage/-history-storage/delete-visits-for.md#mozilla.components.concept.storage.HistoryStorage$deleteVisitsFor(kotlin.String)/url). |
| [deleteVisitsSince](delete-visits-since.md) | `suspend fun deleteVisitsSince(since: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Remove history visits in an inclusive range from [since](../../mozilla.components.concept.storage/-history-storage/delete-visits-since.md#mozilla.components.concept.storage.HistoryStorage$deleteVisitsSince(kotlin.Long)/since) to now. |
| [getAutocompleteSuggestion](get-autocomplete-suggestion.md) | `fun getAutocompleteSuggestion(query: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`): `[`HistoryAutocompleteResult`](../../mozilla.components.concept.storage/-history-autocomplete-result/index.md)`?`<br>Retrieves domain suggestions which best match the [query](../../mozilla.components.concept.storage/-history-storage/get-autocomplete-suggestion.md#mozilla.components.concept.storage.HistoryStorage$getAutocompleteSuggestion(kotlin.String)/query). |
| [getDetailedVisits](get-detailed-visits.md) | `suspend fun getDetailedVisits(start: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`, end: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`, excludeTypes: `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`VisitType`](../../mozilla.components.concept.storage/-visit-type/index.md)`>): `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`VisitInfo`](../../mozilla.components.concept.storage/-visit-info/index.md)`>`<br>Retrieves detailed information about all visits that occurred in the given time range. |
| [getSuggestions](get-suggestions.md) | `fun getSuggestions(query: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`, limit: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`): `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`SearchResult`](../../mozilla.components.concept.storage/-search-result/index.md)`>`<br>Retrieves suggestions matching the [query](../../mozilla.components.concept.storage/-history-storage/get-suggestions.md#mozilla.components.concept.storage.HistoryStorage$getSuggestions(kotlin.String, kotlin.Int)/query). |
| [getTopFrecentSites](get-top-frecent-sites.md) | `suspend fun getTopFrecentSites(numItems: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`): `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`TopFrecentSiteInfo`](../../mozilla.components.concept.storage/-top-frecent-site-info/index.md)`>`<br>Returns a list of the top frecent site infos limited by the given number of items sorted by most to least frecent. |
| [getVisited](get-visited.md) | `suspend fun getVisited(uris: `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`>): `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`>`<br>Maps a list of page URIs to a list of booleans indicating if each URI was visited.`suspend fun getVisited(): `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`>`<br>Retrieves a list of all visited pages. |
| [getVisitsPaginated](get-visits-paginated.md) | `suspend fun getVisitsPaginated(offset: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`, count: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`, excludeTypes: `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`VisitType`](../../mozilla.components.concept.storage/-visit-type/index.md)`>): `[`List`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/index.html)`<`[`VisitInfo`](../../mozilla.components.concept.storage/-visit-info/index.md)`>`<br>Return a "page" of history results. Each page will have visits in descending order with respect to their visit timestamps. In the case of ties, their row id will be used. |
| [prune](prune.md) | `suspend fun prune(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Prune history storage, removing stale history. |
| [recordObservation](record-observation.md) | `suspend fun recordObservation(uri: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`, observation: `[`PageObservation`](../../mozilla.components.concept.storage/-page-observation/index.md)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Records an observation about a page. |
| [recordVisit](record-visit.md) | `suspend fun recordVisit(uri: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`, visit: `[`PageVisit`](../../mozilla.components.concept.storage/-page-visit/index.md)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Records a visit to a page. |
| [runMaintenance](run-maintenance.md) | `suspend fun runMaintenance(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Runs internal database maintenance tasks |
| [warmUp](warm-up.md) | `suspend fun warmUp(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)<br>Make sure underlying database connections are established. |

### Extension Functions

| Name | Summary |
|---|---|
| [loadResourceAsString](../../mozilla.components.support.test.file/kotlin.-any/load-resource-as-string.md) | `fun `[`Any`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html)`.loadResourceAsString(path: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`): `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)<br>Loads a file from the resources folder and returns its content as a string object. |
