added in version 1.1.0
belongs to Maven artifact android.arch.persistence.room:runtime:1.1.0-beta2
belongs to Maven artifact android.arch.persistence.room:runtime:1.1.0-beta2
RoomDatabase.JournalMode
public
static
final
enum
RoomDatabase.JournalMode
extends Enum<RoomDatabase.JournalMode>
| java.lang.Object | ||
| ↳ | java.lang.Enum<android.arch.persistence.room.RoomDatabase.JournalMode> | |
| ↳ | android.arch.persistence.room.RoomDatabase.JournalMode | |
Journal modes for SQLite database.
See also:
Summary
Enum values | |
|---|---|
RoomDatabase.JournalMode |
AUTOMATIC
Let Room choose the journal mode. |
RoomDatabase.JournalMode |
TRUNCATE
Truncate journal mode. |
RoomDatabase.JournalMode |
WRITE_AHEAD_LOGGING
Write-Ahead Logging mode. |
Public methods | |
|---|---|
static
RoomDatabase.JournalMode
|
valueOf(String name)
|
static
final
JournalMode[]
|
values()
|
Inherited methods | |
|---|---|
Enum values
AUTOMATIC
added in version 1.1.0
RoomDatabase.JournalMode AUTOMATIC
Let Room choose the journal mode. This is the default value when no explicit value is specified.
The actual value will be TRUNCATE when the device runs API Level lower than 16
or it is a low-RAM device. Otherwise, WRITE_AHEAD_LOGGING will be used.
WRITE_AHEAD_LOGGING
added in version 1.1.0
RoomDatabase.JournalMode WRITE_AHEAD_LOGGING
Write-Ahead Logging mode.
Public methods
valueOf
added in version 1.1.0
RoomDatabase.JournalMode valueOf (String name)
| Parameters | |
|---|---|
name |
String |
| Returns | |
|---|---|
RoomDatabase.JournalMode |
|
Annotations
Classes
Enums
Exceptions
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
Last updated 2025-02-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10 UTC."],[],[],null,["# RoomDatabase.JournalMode\n\nadded in [version 1.1.0](/topic/libraries/support-library/revisions) \nbelongs to Maven artifact android.arch.persistence.room:runtime:1.1.0-beta2 \nSummary: [Enums](#enumconstants) \\| [Methods](#pubmethods) \\| [Inherited Methods](#inhmethods) \n\nRoomDatabase.JournalMode\n========================\n\n| The `android.arch` Architecture Components packages are no longer maintained. They have been superseded by the corresponding [androidx.\\*](/jetpack/androidx/migrate) packages. See [androidx.room.RoomDatabase.JournalMode](/reference/androidx/room/RoomDatabase.JournalMode) instead.\n\n\n`\npublic\nstatic\nfinal\n\nenum\nRoomDatabase.JournalMode\n`\n\n\n`\n\n\n`\n\n`\n\nextends Enum\u003c`[RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode)`\u003e\n\n\n`\n\n`\n\n\n`\n\n|---|---|--------------------------------------------------------|\n| java.lang.Object |||\n| ↳ | java.lang.Enum\\\u003c[android.arch.persistence.room.RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode)\\\u003e ||\n| | ↳ | android.arch.persistence.room.RoomDatabase.JournalMode |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nJournal modes for SQLite database. \n**See also:**\n\n- [setJournalMode(JournalMode)](/reference/android/arch/persistence/room/RoomDatabase.Builder#setJournalMode(android.arch.persistence.room.RoomDatabase.JournalMode))\n\nSummary\n-------\n\n| ### Enum values ||\n|-----------------------------------------------------------------------------------------------|-------------------------------------------------|\n| [RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | `AUTOMATIC` Let Room choose the journal mode. |\n| [RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | `TRUNCATE` Truncate journal mode. |\n| [RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | `WRITE_AHEAD_LOGGING` Write-Ahead Logging mode. |\n\n| ### Public methods ||\n|---------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------|\n| ` static `[RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | ` `[valueOf](/reference/android/arch/persistence/room/RoomDatabase.JournalMode#valueOf(java.lang.String))`(String name) ` |\n| ` static final `[JournalMode[]](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | ` `[values](/reference/android/arch/persistence/room/RoomDatabase.JournalMode#values())`() ` |\n\n| ### Inherited methods |\n|-----------------------|---|\n| From class ` java.lang.Enum ` |---------------------------------|-----------------------------------------| | ` final Object` | ` clone() ` | | ` final int` | ` compareTo(E arg0) ` | | ` int` | ` compareTo(Object arg0) ` | | ` final boolean` | ` equals(Object arg0) ` | | ` final void` | ` finalize() ` | | ` final Class\u003cE\u003e` | ` getDeclaringClass() ` | | ` final int` | ` hashCode() ` | | ` final String` | ` name() ` | | ` final int` | ` ordinal() ` | | ` String` | ` toString() ` | | ` static \u003cT extends Enum\u003cT\u003e\u003e T` | ` valueOf(Class\u003cT\u003e arg0, String arg1) ` | ||\n| From class ` java.lang.Object ` |-------------------|-------------------------------| | ` Object` | ` clone() ` | | ` boolean` | ` equals(Object arg0) ` | | ` void` | ` finalize() ` | | ` final Class\u003c?\u003e` | ` getClass() ` | | ` int` | ` hashCode() ` | | ` final void` | ` notify() ` | | ` final void` | ` notifyAll() ` | | ` String` | ` toString() ` | | ` final void` | ` wait(long arg0, int arg1) ` | | ` final void` | ` wait(long arg0) ` | | ` final void` | ` wait() ` | ||\n| From interface ` java.lang.Comparable ` |-----------------|-----------------------| | ` abstract int` | ` compareTo(E arg0) ` | ||\n\nEnum values\n-----------\n\n### AUTOMATIC\n\nadded in [version 1.1.0](/topic/libraries/support-library/revisions) \n\n```\nRoomDatabase.JournalMode AUTOMATIC\n```\n\nLet Room choose the journal mode. This is the default value when no explicit value is\nspecified.\n\n\nThe actual value will be [TRUNCATE](/reference/android/arch/persistence/room/RoomDatabase.JournalMode#TRUNCATE) when the device runs API Level lower than 16\nor it is a low-RAM device. Otherwise, [WRITE_AHEAD_LOGGING](/reference/android/arch/persistence/room/RoomDatabase.JournalMode#WRITE_AHEAD_LOGGING) will be used.\n\n\u003cbr /\u003e\n\n### TRUNCATE\n\nadded in [version 1.1.0](/topic/libraries/support-library/revisions) \n\n```\nRoomDatabase.JournalMode TRUNCATE\n```\n\nTruncate journal mode.\n\n\u003cbr /\u003e\n\n### WRITE_AHEAD_LOGGING\n\nadded in [version 1.1.0](/topic/libraries/support-library/revisions) \n\n```\nRoomDatabase.JournalMode WRITE_AHEAD_LOGGING\n```\n\nWrite-Ahead Logging mode.\n\n\u003cbr /\u003e\n\nPublic methods\n--------------\n\n### valueOf\n\nadded in [version 1.1.0](/topic/libraries/support-library/revisions) \n\n```\nRoomDatabase.JournalMode valueOf (String name)\n```\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n| Parameters ||\n|--------|-----------------|\n| `name` | `String` \u003cbr /\u003e |\n\n| Returns ||\n|-----------------------------------------------------------------------------------------------|--------|\n| [RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | \u003cbr /\u003e |\n\n### values\n\nadded in [version 1.1.0](/topic/libraries/support-library/revisions) \n\n```\nJournalMode[] values ()\n```\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n| Returns ||\n|------------------------------------------------------------------------------------|--------|\n| [JournalMode[]](/reference/android/arch/persistence/room/RoomDatabase.JournalMode) | \u003cbr /\u003e |\n\n-\n\n Annotations\n -----------\n\n - [ColumnInfo](/reference/android/arch/persistence/room/ColumnInfo)\n - [ColumnInfo.Collate](/reference/android/arch/persistence/room/ColumnInfo.Collate)\n - [ColumnInfo.SQLiteTypeAffinity](/reference/android/arch/persistence/room/ColumnInfo.SQLiteTypeAffinity)\n - [Dao](/reference/android/arch/persistence/room/Dao)\n - [Database](/reference/android/arch/persistence/room/Database)\n - [Delete](/reference/android/arch/persistence/room/Delete)\n - [Embedded](/reference/android/arch/persistence/room/Embedded)\n - [Entity](/reference/android/arch/persistence/room/Entity)\n - [ForeignKey](/reference/android/arch/persistence/room/ForeignKey)\n - [ForeignKey.Action](/reference/android/arch/persistence/room/ForeignKey.Action)\n - [Ignore](/reference/android/arch/persistence/room/Ignore)\n - [Index](/reference/android/arch/persistence/room)\n - [Insert](/reference/android/arch/persistence/room/Insert)\n - [OnConflictStrategy](/reference/android/arch/persistence/room/OnConflictStrategy)\n - [PrimaryKey](/reference/android/arch/persistence/room/PrimaryKey)\n - [Query](/reference/android/arch/persistence/room/Query)\n - [RawQuery](/reference/android/arch/persistence/room/RawQuery)\n - [Relation](/reference/android/arch/persistence/room/Relation)\n - [SkipQueryVerification](/reference/android/arch/persistence/room/SkipQueryVerification)\n - [Transaction](/reference/android/arch/persistence/room/Transaction)\n - [TypeConverter](/reference/android/arch/persistence/room/TypeConverter)\n - [TypeConverters](/reference/android/arch/persistence/room/TypeConverters)\n - [Update](/reference/android/arch/persistence/room/Update)\n-\n\n Classes\n -------\n\n - [DatabaseConfiguration](/reference/android/arch/persistence/room/DatabaseConfiguration)\n - [InvalidationTracker](/reference/android/arch/persistence/room/InvalidationTracker)\n - [InvalidationTracker.Observer](/reference/android/arch/persistence/room/InvalidationTracker.Observer)\n - [Room](/reference/android/arch/persistence/room/Room)\n - [RoomDatabase](/reference/android/arch/persistence/room/RoomDatabase)\n - [RoomDatabase.Builder](/reference/android/arch/persistence/room/RoomDatabase.Builder)\n - [RoomDatabase.Callback](/reference/android/arch/persistence/room/RoomDatabase.Callback)\n - [RoomDatabase.MigrationContainer](/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer)\n - [RoomWarnings](/reference/android/arch/persistence/room/RoomWarnings)\n - [RxRoom](/reference/android/arch/persistence/room/RxRoom)\n-\n\n Enums\n -----\n\n - [RoomDatabase.JournalMode](/reference/android/arch/persistence/room/RoomDatabase.JournalMode)\n-\n\n Exceptions\n ----------\n\n - [EmptyResultSetException](/reference/android/arch/persistence/room/EmptyResultSetException)"]]