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110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
/* Copyright (C) 2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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//
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// ndbapi_example2.cpp: Using asynchronous transactions in NDB API
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//
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// Execute ndbapi_example1 to create the table "MYTABLENAME"
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// before executing this program.
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//
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// Correct output from this program is:
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//
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// Successful insert.
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// Successful insert.
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#include <NdbApi.hpp>
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// Used for cout
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#include <iostream>
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#define APIERROR(error) \
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{ std::cout << "Error in " << __FILE__ << ", line:" << __LINE__ << ", code:" \
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<< error.code << ", msg: " << error.message << "." << std::endl; \
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exit(-1); }
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static void callback(int result, NdbConnection* NdbObject, void* aObject);
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int main()
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{
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Ndb* myNdb = new Ndb( "TEST_DB_2" ); // Object representing the database
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NdbConnection* myNdbConnection[2]; // For transactions
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NdbOperation* myNdbOperation; // For operations
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/*******************************************
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* Initialize NDB and wait until its ready *
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*******************************************/
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if (myNdb->init(2) == -1) { // Want two parallel insert transactions
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APIERROR(myNdb->getNdbError());
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exit(-1);
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}
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if (myNdb->waitUntilReady(30) != 0) {
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std::cout << "NDB was not ready within 30 secs." << std::endl;
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exit(-1);
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}
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/******************************************************
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* Insert (we do two insert transactions in parallel) *
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******************************************************/
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for (int i = 0; i < 2; i++) {
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myNdbConnection[i] = myNdb->startTransaction();
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if (myNdbConnection[i] == NULL) APIERROR(myNdb->getNdbError());
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myNdbOperation = myNdbConnection[i]->getNdbOperation("MYTABLENAME");
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// Error check. If error, then maybe table MYTABLENAME is not in database
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if (myNdbOperation == NULL) APIERROR(myNdbConnection[i]->getNdbError());
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myNdbOperation->insertTuple();
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myNdbOperation->equal("ATTR1", 20 + i);
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myNdbOperation->setValue("ATTR2", 20 + i);
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// Prepare transaction (the transaction is NOT yet sent to NDB)
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myNdbConnection[i]->executeAsynchPrepare(Commit, &callback, NULL);
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}
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// Send all transactions to NDB
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myNdb->sendPreparedTransactions(0);
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// Poll all transactions
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myNdb->pollNdb(3000, 2);
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// Close all transactions
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for (int i = 0; i < 2; i++)
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myNdb->closeTransaction(myNdbConnection[i]);
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delete myNdb;
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}
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/*
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* callback : This is called when the transaction is polled
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*
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* (This function must have three arguments:
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* - The result of the transaction,
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* - The NdbConnection object, and
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* - A pointer to an arbitrary object.)
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*/
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static void
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callback(int result, NdbConnection* myTrans, void* aObject)
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{
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if (result == -1) {
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std::cout << "Poll error: " << std::endl;
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APIERROR(myTrans->getNdbError());
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} else {
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std::cout << "Successful insert." << std::endl;
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}
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}
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