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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
//
// ndbapi_async1.cpp: Using asynchronous transactions in NDB API
//
// Execute ndbapi_example1 to create the table "MYTABLENAME"
// before executing this program.
//
// Correct output from this program is:
//
// Successful insert.
// Successful insert.
#include <NdbApi.hpp>
// Used for cout
#include <iostream>
#define APIERROR(error) \
{ std::cout << "Error in " << __FILE__ << ", line:" << __LINE__ << ", code:" \
<< error.code << ", msg: " << error.message << "." << std::endl; \
exit(-1); }
static void callback(int result, NdbTransaction* NdbObject, void* aObject);
int main()
{
ndb_init();
Ndb_cluster_connection *cluster_connection=
new Ndb_cluster_connection(); // Object representing the cluster
if (cluster_connection->wait_until_ready(30,30))
{
std::cout << "Cluster was not ready within 30 secs." << std::endl;
exit(-1);
}
int r= cluster_connection->connect(5 /* retries */,
3 /* delay between retries */,
1 /* verbose */);
if (r > 0)
{
std::cout
<< "Cluster connect failed, possibly resolved with more retries.\n";
exit(-1);
}
else if (r < 0)
{
std::cout
<< "Cluster connect failed.\n";
exit(-1);
}
if (cluster_connection->wait_until_ready(30,30))
{
std::cout << "Cluster was not ready within 30 secs." << std::endl;
exit(-1);
}
Ndb* myNdb = new Ndb( cluster_connection,
"TEST_DB_2" ); // Object representing the database
NdbTransaction* myNdbTransaction[2]; // For transactions
NdbOperation* myNdbOperation; // For operations
if (myNdb->init(2) == -1) { // Want two parallel insert transactions
APIERROR(myNdb->getNdbError());
exit(-1);
}
/******************************************************
* Insert (we do two insert transactions in parallel) *
******************************************************/
const NdbDictionary::Dictionary* myDict= myNdb->getDictionary();
const NdbDictionary::Table *myTable= myDict->getTable("MYTABLENAME");
if (myTable == NULL)
APIERROR(myDict->getNdbError());
for (int i = 0; i < 2; i++) {
myNdbTransaction[i] = myNdb->startTransaction();
if (myNdbTransaction[i] == NULL) APIERROR(myNdb->getNdbError());
myNdbOperation = myNdbTransaction[i]->getNdbOperation(myTable);
if (myNdbOperation == NULL) APIERROR(myNdbTransaction[i]->getNdbError());
myNdbOperation->insertTuple();
myNdbOperation->equal("ATTR1", 20 + i);
myNdbOperation->setValue("ATTR2", 20 + i);
// Prepare transaction (the transaction is NOT yet sent to NDB)
myNdbTransaction[i]->executeAsynchPrepare(NdbTransaction::Commit,
&callback, NULL);
}
// Send all transactions to NDB
myNdb->sendPreparedTransactions(0);
// Poll all transactions
myNdb->pollNdb(3000, 2);
// Close all transactions
for (int i = 0; i < 2; i++)
myNdb->closeTransaction(myNdbTransaction[i]);
delete myNdb;
delete cluster_connection;
ndb_end(0);
return 0;
}
/*
* callback : This is called when the transaction is polled
*
* (This function must have three arguments:
* - The result of the transaction,
* - The NdbTransaction object, and
* - A pointer to an arbitrary object.)
*/
static void
callback(int result, NdbTransaction* myTrans, void* aObject)
{
if (result == -1) {
std::cout << "Poll error: " << std::endl;
APIERROR(myTrans->getNdbError());
} else {
std::cout << "Successful insert." << std::endl;
}
}
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