Transaction

public class Transaction extends Object

The Transaction class encapsulates the functionality needed to perform a transaction on the data at a location.

To run a transaction, provide a Transaction.Handler to runTransaction(com.google.firebase.database.Transaction.Handler). That handler will be passed the current data at the location, and must return a Transaction.Result. A Transaction.Result can be created using either success(MutableData) or abort().

Nested Class Summary

interface Transaction.Handler An object implementing this interface is used to run a transaction, and will be notified of the results of the transaction. 
class Transaction.Result Instances of this class represent the desired outcome of a single run of a Transaction.Handler's doTransaction method. 

Public Constructor Summary

Transaction()

Public Method Summary

static Transaction.Result
abort()
static Transaction.Result
success(MutableData resultData)

Inherited Method Summary

Object
clone()
boolean
equals(Object arg0)
void
finalize()
final Class<?>
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()

Public Constructors

public Transaction ()

Public Methods

public static Transaction.Result abort ()

Returns

public static Transaction.Result success (MutableData resultData)

Parameters
resultData The desired data at the location
Returns