Uses of Interface
com.google.appengine.api.datastore.Transaction

Packages that use Transaction

Package	Description
com.google.appengine.api.datastore	Provides persistent storage, also accessible via JDO or JPA interfaces.
com.google.appengine.api.taskqueue	Provides a mechanism to perform work initiated by a user request, outside of that request.

Uses of Transaction in com.google.appengine.api.datastore

Methods in com.google.appengine.api.datastore that return Transaction

Modifier and Type	Method	Description
Transaction	DatastoreService.beginTransaction()	Equivalent to beginTransaction(TransactionOptions.Builder.withDefaults()).
Transaction	DatastoreService.beginTransaction(TransactionOptions options)	Begins a transaction against the datastore.
Transaction	AdminDatastoreService.getCurrentTransaction()
Transaction	AdminDatastoreService.getCurrentTransaction(Transaction returnedIfNoTxn)
Transaction	BaseDatastoreService.getCurrentTransaction()	Returns the current transaction for this thread, or throws an exception if there is no current transaction.
Transaction	BaseDatastoreService.getCurrentTransaction(Transaction returnedIfNoTxn)	Returns the current transaction for this thread, or returns the parameter if there is no current transaction.
Transaction	CallbackContext.getCurrentTransaction()	Returns the current transaction, or null if there is no current transaction.
@Nullable Transaction	TransactionOptions.previousTransaction()	Return the previous transaction that is being retried, or null if none was provided.

Methods in com.google.appengine.api.datastore that return types with arguments of type Transaction

Modifier and Type	Method	Description
Future<Transaction>	AdminDatastoreService.beginTransaction()
Future<Transaction>	AdminDatastoreService.beginTransaction(TransactionOptions options)
Future<Transaction>	AsyncDatastoreService.beginTransaction()	See DatastoreService.beginTransaction().
Future<Transaction>	AsyncDatastoreService.beginTransaction(TransactionOptions options)	See DatastoreService.beginTransaction(TransactionOptions).
Collection<Transaction>	AdminDatastoreService.getActiveTransactions()
Collection<Transaction>	BaseDatastoreService.getActiveTransactions()	Returns all Transactions started by this thread upon which no attempt to commit or rollback has been made.

Methods in com.google.appengine.api.datastore with parameters of type Transaction

Modifier and Type	Method	Description
Future<Void>	AdminDatastoreService.delete(@Nullable Transaction txn, Key... keys)
Future<Void>	AdminDatastoreService.delete(@Nullable Transaction txn, Iterable<Key> keys)
Future<Void>	AsyncDatastoreService.delete(@Nullable Transaction txn, Key... keys)	See DatastoreService.delete(Transaction, Iterable).
Future<Void>	AsyncDatastoreService.delete(@Nullable Transaction txn, Iterable<Key> keys)	See DatastoreService.delete(Transaction, Iterable).
void	DatastoreService.delete(Transaction txn, Key... keys)	Exhibits the same behavior as DatastoreService.delete(Key...), but executes within the provided transaction.
void	DatastoreService.delete(Transaction txn, Iterable<Key> keys)	Exhibits the same behavior as DatastoreService.delete(Iterable), but executes within the provided transaction.
Future<Entity>	AdminDatastoreService.get(@Nullable Transaction txn, Key key)
Future<Map<Key,Entity>>	AdminDatastoreService.get(@Nullable Transaction txn, Iterable<Key> keys)
Future<Entity>	AsyncDatastoreService.get(@Nullable Transaction txn, Key key)	See DatastoreService.get(Transaction, Key).
Future<Map<Key,Entity>>	AsyncDatastoreService.get(@Nullable Transaction txn, Iterable<Key> keys)	See DatastoreService.get(Transaction, Iterable).
Entity	DatastoreService.get(Transaction txn, Key key)	Exhibits the same behavior as DatastoreService.get(Key), but executes within the provided transaction.
Map<Key,Entity>	DatastoreService.get(Transaction txn, Iterable<Key> keys)	Exhibits the same behavior as DatastoreService.get(Iterable), but executes within the provided transaction.
Transaction	AdminDatastoreService.getCurrentTransaction(Transaction returnedIfNoTxn)
Transaction	BaseDatastoreService.getCurrentTransaction(Transaction returnedIfNoTxn)	Returns the current transaction for this thread, or returns the parameter if there is no current transaction.
PreparedQuery	AdminDatastoreService.prepare(Transaction txn, Query query)
PreparedQuery	BaseDatastoreService.prepare(Transaction txn, Query query)	Exhibits the same behavior as BaseDatastoreService.prepare(Query), but executes within the provided transaction.
Future<Key>	AdminDatastoreService.put(@Nullable Transaction txn, Entity entity)
Future<List<Key>>	AdminDatastoreService.put(@Nullable Transaction txn, Iterable<Entity> entities)
Future<Key>	AsyncDatastoreService.put(@Nullable Transaction txn, Entity entity)	See DatastoreService.put(Transaction, Entity).
Future<List<Key>>	AsyncDatastoreService.put(@Nullable Transaction txn, Iterable<Entity> entities)	See DatastoreService.put(Transaction, Iterable).
Key	DatastoreService.put(Transaction txn, Entity entity)	Exhibits the same behavior as DatastoreService.put(Entity), but executes within the provided transaction.
List<Key>	DatastoreService.put(Transaction txn, Iterable<Entity> entities)	Exhibits the same behavior as DatastoreService.put(Iterable), but executes within the provided transaction.
TransactionOptions	TransactionOptions.setPreviousTransaction(Transaction previousTransaction)	Set which previous transaction to retry.
static void	TransactionHelper.setTransaction(Transaction txn, com.google.appengine.api.taskqueue.TaskQueuePb.TaskQueueAddRequest.Builder request)	Sets either the transaction or datastore_transaction field in a TaskQueueAddRequest depending on what kind of transaction is provided.
static TransactionOptions	TransactionOptions.Builder.withPreviousTransaction(Transaction previousTransaction)	Shorthand for TransactionOptions.withTransactionMode(Mode.READ_WRITE).setPreviousTransaction(...);

Uses of Transaction in com.google.appengine.api.taskqueue

Methods in com.google.appengine.api.taskqueue with parameters of type Transaction

Modifier and Type	Method	Description
TaskHandle	Queue.add(Transaction txn, TaskOptions taskOptions)	Submits a task to this queue in the provided Transaction.
List<TaskHandle>	Queue.add(Transaction txn, Iterable<TaskOptions> taskOptions)	Submits tasks to this queue in the provided Transaction.
Future<TaskHandle>	Queue.addAsync(Transaction txn, TaskOptions taskOptions)	Asynchronously submits a task to this queue in the provided Transaction.
Future<List<TaskHandle>>	Queue.addAsync(Transaction txn, Iterable<TaskOptions> taskOptions)	Asynchronously submits tasks to this queue in the provided Transaction.