Struct xpcom::interfaces::mozIStorageService
[−]
[src]
#[repr(C)]pub struct mozIStorageService { /* fields omitted */ }
interface mozIStorageService : nsISupports
/**
* The mozIStorageService interface is intended to be implemented by
* a service that can create storage connections (mozIStorageConnection)
* to either a well-known profile database or to a specific database file.
*
* This is the only way to open a database connection.
*
* @note The first reference to mozIStorageService must be made on the main
* thread.
*/
Methods
impl mozIStorageService
[src]
pub fn coerce<T: mozIStorageServiceCoerce>(&self) -> &T
[src]
Cast this mozIStorageService
to one of its base interfaces.
impl mozIStorageService
[src]
pub unsafe fn OpenAsyncDatabase(
&self,
aDatabaseStore: *const nsIVariant,
aOptions: *const nsIPropertyBag2,
aCallback: *const mozIStorageCompletionCallback
) -> nsresult
[src]
&self,
aDatabaseStore: *const nsIVariant,
aOptions: *const nsIPropertyBag2,
aCallback: *const mozIStorageCompletionCallback
) -> nsresult
/**
* Open an asynchronous connection to a database.
*
* This method MUST be called from the main thread. The connection object
* returned by this function is not threadsafe. You MUST use it only from
* the main thread.
*
* If you have more than one connection to a file, you MUST use the EXACT
* SAME NAME for the file each time, including case. The sqlite code uses
* a simple string compare to see if there is already a connection. Opening
* a connection to "Foo.sqlite" and "foo.sqlite" will CORRUPT YOUR DATABASE.
*
* @param aDatabaseStore Either a nsIFile representing the file that contains
* the database or a special string to open a special database. The special
* string may be:
* - "memory" to open an in-memory database.
*
* @param aOptions A set of options (may be null). Options may contain:
* - bool shared (defaults to |false|).
* -- If |true|, opens the database with a shared-cache. The
* shared-cache mode is more memory-efficient when many
* connections to the same database are expected, though, the
* connections will contend the cache resource. In any cases
* where performance matter, working without a shared-cache will
* improve concurrency. @see openUnsharedDatabase
*
* - int growthIncrement (defaults to none).
* -- Set the growth increment for the main database. This hints SQLite to
* grow the database file by a given chunk size and may reduce
* filesystem fragmentation on large databases.
* @see mozIStorageConnection::setGrowthIncrement
*
* @param aCallback A callback that will receive the result of the operation.
* In case of error, it may receive as status:
* - NS_ERROR_OUT_OF_MEMORY if allocating a new storage object fails.
* - NS_ERROR_FILE_CORRUPTED if the database file is corrupted.
* In case of success, it receives as argument the new database
* connection, as an instance of |mozIStorageAsyncConnection|.
*
* @throws NS_ERROR_INVALID_ARG if |aDatabaseStore| is neither a file nor
* one of the special strings understood by this method, or if one of
* the options passed through |aOptions| does not have the right type.
* @throws NS_ERROR_NOT_SAME_THREAD if called from a thread other than the
* main thread.
*/
void openAsyncDatabase (in nsIVariant aDatabaseStore, [optional] in nsIPropertyBag2 aOptions, in mozIStorageCompletionCallback aCallback);
pub unsafe fn OpenSpecialDatabase(
&self,
aStorageKey: *const c_char,
_retval: *mut *const mozIStorageConnection
) -> nsresult
[src]
&self,
aStorageKey: *const c_char,
_retval: *mut *const mozIStorageConnection
) -> nsresult
/**
* Get a connection to a named special database storage.
*
* @param aStorageKey a string key identifying the type of storage
* requested. Valid values include: "memory".
*
* @see openDatabase for restrictions on how database connections may be
* used. For the profile database, you should only access it from the main
* thread since other callers may also have connections.
*
* @returns a new mozIStorageConnection for the requested
* storage database.
*
* @throws NS_ERROR_INVALID_ARG if aStorageKey is invalid.
*/
mozIStorageConnection openSpecialDatabase (in string aStorageKey);
pub unsafe fn OpenDatabase(
&self,
aDatabaseFile: *const nsIFile,
_retval: *mut *const mozIStorageConnection
) -> nsresult
[src]
&self,
aDatabaseFile: *const nsIFile,
_retval: *mut *const mozIStorageConnection
) -> nsresult
/**
* Open a connection to the specified file.
*
* Consumers should check mozIStorageConnection::connectionReady to ensure
* that they can use the database. If this value is false, it is strongly
* recommended that the database be backed up with
* mozIStorageConnection::backupDB so user data is not lost.
*
* ==========
* DANGER
* ==========
*
* If you have more than one connection to a file, you MUST use the EXACT
* SAME NAME for the file each time, including case. The sqlite code uses
* a simple string compare to see if there is already a connection. Opening
* a connection to "Foo.sqlite" and "foo.sqlite" will CORRUPT YOUR DATABASE.
*
* The connection object returned by this function is not threadsafe. You must
* use it only from the thread you created it from.
*
* @param aDatabaseFile
* A nsIFile that represents the database that is to be opened..
*
* @returns a mozIStorageConnection for the requested database file.
*
* @throws NS_ERROR_OUT_OF_MEMORY
* If allocating a new storage object fails.
* @throws NS_ERROR_FILE_CORRUPTED
* If the database file is corrupted.
*/
mozIStorageConnection openDatabase (in nsIFile aDatabaseFile);
[src]
/**
* Open a connection to the specified file that doesn't share a sqlite cache.
*
* Without a shared-cache, each connection uses its own pages cache, which
* may be memory inefficient with a large number of connections, in such a
* case so you should use openDatabase instead. On the other side, if cache
* contention may be an issue, for instance when concurrency is important to
* ensure responsiveness, using unshared connections may be a performance win.
*
* ==========
* DANGER
* ==========
*
* If you have more than one connection to a file, you MUST use the EXACT
* SAME NAME for the file each time, including case. The sqlite code uses
* a simple string compare to see if there is already a connection. Opening
* a connection to "Foo.sqlite" and "foo.sqlite" will CORRUPT YOUR DATABASE.
*
* The connection object returned by this function is not threadsafe. You must
* use it only from the thread you created it from.
*
* @param aDatabaseFile
* A nsIFile that represents the database that is to be opened.
*
* @returns a mozIStorageConnection for the requested database file.
*
* @throws NS_ERROR_OUT_OF_MEMORY
* If allocating a new storage object fails.
* @throws NS_ERROR_FILE_CORRUPTED
* If the database file is corrupted.
*/
mozIStorageConnection openUnsharedDatabase (in nsIFile aDatabaseFile);
pub unsafe fn OpenDatabaseWithFileURL(
&self,
aFileURL: *const nsIFileURL,
_retval: *mut *const mozIStorageConnection
) -> nsresult
[src]
&self,
aFileURL: *const nsIFileURL,
_retval: *mut *const mozIStorageConnection
) -> nsresult
/**
* See openDatabase(). Exactly the same only initialized with a file URL.
* Custom parameters can be passed to SQLite and VFS implementations through
* the query part of the URL.
*
* @param aURL
* A nsIFileURL that represents the database that is to be opened.
*/
mozIStorageConnection openDatabaseWithFileURL (in nsIFileURL aFileURL);
pub unsafe fn BackupDatabaseFile(
&self,
aDBFile: *const nsIFile,
aBackupFileName: &nsAString,
aBackupParentDirectory: *const nsIFile,
_retval: *mut *const nsIFile
) -> nsresult
[src]
&self,
aDBFile: *const nsIFile,
aBackupFileName: &nsAString,
aBackupParentDirectory: *const nsIFile,
_retval: *mut *const nsIFile
) -> nsresult
/**
* Copies the specified database file to the specified parent directory with
* the specified file name. If the parent directory is not specified, it
* places the backup in the same directory as the current file. This function
* ensures that the file being created is unique.
*
* @param aDBFile
* The database file that will be backed up.
* @param aBackupFileName
* The name of the new backup file to create.
* @param [optional] aBackupParentDirectory
* The directory you'd like the backup file to be placed.
* @return The nsIFile representing the backup file.
*/
nsIFile backupDatabaseFile (in nsIFile aDBFile, in AString aBackupFileName, [optional] in nsIFile aBackupParentDirectory);
Methods from Deref<Target = nsISupports>
pub fn coerce<T: nsISupportsCoerce>(&self) -> &T
[src]
Cast this nsISupports
to one of its base interfaces.
pub unsafe fn QueryInterface(
&self,
uuid: &nsIID,
result: *mut *mut c_void
) -> nsresult
[src]
&self,
uuid: &nsIID,
result: *mut *mut c_void
) -> nsresult
void QueryInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result);
pub unsafe fn AddRef(&self) -> nsrefcnt
[src]
[noscript,notxpcom] nsrefcnt AddRef ();
pub unsafe fn Release(&self) -> nsrefcnt
[src]
[noscript,notxpcom] nsrefcnt Release ();
Trait Implementations
impl XpCom for mozIStorageService
[src]
const IID: nsIID
IID: nsIID = nsID(129413877, 28055, 18356, [149, 132, 230, 91, 196, 103, 254, 158])
fn query_interface<T: XpCom>(&self) -> Option<RefPtr<T>>
[src]
Perform a QueryInterface call on this object, attempting to dynamically cast it to the requested interface type. Returns Some(RefPtr) if the cast succeeded, and None otherwise. Read more
impl RefCounted for mozIStorageService
[src]
unsafe fn addref(&self)
[src]
Increment the reference count.
unsafe fn release(&self)
[src]
Decrement the reference count, potentially freeing backing memory.
impl Deref for mozIStorageService
[src]
type Target = nsISupports
The resulting type after dereferencing.
fn deref(&self) -> &nsISupports
[src]
Dereferences the value.