-I)Berkeley DB: DbTxn.prepare[P

DbTxn.prepare





import com.sleepycat.db.*;

public void prepare() throws DbException;





Description



GThe DbTxn.prepare method initiates the beginning of a two-phase commit.

LIn a distributed transaction environment, Berkeley DB can be used as a localGtransaction manager. In this case, the distributed transaction managerCmust send prepare messages to each local manager. The local@manager must then issue a DbTxn.prepare and await its successfulFreturn before responding to the distributed transaction manager. OnlyGafter the distributed transaction manager receives successful responses;from all of its prepare messages should it issue anycommit messages.

The DbTxn.prepareHmethod throws an exception that encapsulates an errno on failure.



Errors

UIf a fatal error occurs in Berkeley DB, the DbTxn.prepare method may fail and throw a}DbRunRecoveryException, at which point all subsequent database%calls will also fail in the same way.

The DbTxn.prepare&method may fail and throw an exceptionKfor any of the errors specified for the following Berkeley DB and C library functions: abort(3), fcntl(3), fflush(3), fprintf(3),free(3), getpid(3),6DbLog.put, malloc(3), memcpy(3), memset(3), strerror(3), vfprintf(3),and vsnprintf(3).



Class

3DbTxn



See Also

:DbTxn.abort,<DbTxn.commit,3DbTxn.idandDbTxn.prepare.
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