TransactionOptions (Google App Engine API for Java)

com.google.appengine.api.datastore

Class TransactionOptions

  • java.lang.Object
    • com.google.appengine.api.datastore.TransactionOptions

  • public final class TransactionOptions
extends java.lang.Object
    Describes options for transactions, passed at transaction creation time.

    XG is a boolean that enables or disables the use of cross-group transactions.

    Notes on usage:
    The recommended way to instantiate a TransactionsOptions object is to statically import TransactionOptions.Builder.* and invoke a static creation method followed by an instance mutator (if needed): 

     import static com.google.appengine.api.datastore.TransactionOptions.Builder.*;

 ...

 datastoreService.beginTransaction(withXG(true));

    • Method Detail

      • setXG

        public TransactionOptions setXG(boolean enable)
        Enable or disable the use of cross-group transactions.
        Parameters:
        enable - true to cross-group transactions, false to restrict transactions to a single entity group.
        Returns:
        this (for chaining)

      • clearXG

        public TransactionOptions clearXG()
        Return the cross-group transaction setting to default (disabled).

      • isXG

        public boolean isXG()
        Returns:
        true if cross-group transactions are allowed, false if they are not allowed.

      • allowsMultipleEntityGroups

        @Deprecated
public java.lang.Boolean allowsMultipleEntityGroups()
        Deprecated. 
        See Also:
        isXG()

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • equals

        public boolean equals(java.lang.Object obj)
        Overrides:
        equals in class java.lang.Object

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object