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/* Copyright (c) 2004-2006 MySQL AB, 2009 Sun Microsystems, Inc.
Use is subject to license terms.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "consumer_restore.hpp"
#include <NdbSleep.h>
extern FilteredNdbOut err;
extern FilteredNdbOut info;
extern FilteredNdbOut debug;
static bool asynchErrorHandler(NdbTransaction * trans, Ndb * ndb);
static void callback(int result, NdbTransaction* trans, void* aObject);
bool
BackupRestore::init()
{
if (!m_restore && !m_restore_meta)
return true;
m_ndb = new Ndb();
if (m_ndb == NULL)
return false;
// Turn off table name completion
m_ndb->useFullyQualifiedNames(false);
m_ndb->init(1024);
if (m_ndb->waitUntilReady(30) != 0)
{
ndbout << "Failed to connect to ndb!!" << endl;
return false;
}
ndbout << "Connected to ndb!!" << endl;
#if USE_MYSQL
if(use_mysql)
{
if ( mysql_thread_safe() == 0 )
{
ndbout << "Not thread safe mysql library..." << endl;
exit(-1);
}
ndbout << "Connecting to MySQL..." <<endl;
/**
* nwe param:
* port
* host
* user
*/
bool returnValue = true;
mysql_init(&mysql);
{
int portNo = 3306;
if ( mysql_real_connect(&mysql,
ga_host,
ga_user,
ga_password,
ga_database,
ga_port,
:: ga_socket,
0) == NULL )
{
ndbout_c("Connect failed: %s", mysql_error(&mysql));
returnValue = false;
}
mysql.reconnect= 1;
ndbout << "Connected to MySQL!!!" <<endl;
}
/* if(returnValue){
mysql_set_server_option(&mysql, MYSQL_OPTION_MULTI_STATEMENTS_ON);
}
*/
return returnValue;
}
#endif
if (m_callback) {
delete [] m_callback;
m_callback = 0;
}
m_callback = new restore_callback_t[m_parallelism];
if (m_callback == 0)
{
ndbout << "Failed to allocate callback structs" << endl;
return false;
}
m_free_callback = m_callback;
for (int i= 0; i < m_parallelism; i++) {
m_callback[i].restore = this;
m_callback[i].connection = 0;
m_callback[i].retries = 0;
if (i > 0)
m_callback[i-1].next = &(m_callback[i]);
}
m_callback[m_parallelism-1].next = 0;
return true;
}
BackupRestore::~BackupRestore()
{
if (m_ndb != 0)
delete m_ndb;
if (m_callback)
delete [] m_callback;
}
#ifdef USE_MYSQL
bool
BackupRestore::table(const TableS & table, MYSQL * mysqlp){
if (!m_restore_meta)
{
return true;
}
char tmpTabName[MAX_TAB_NAME_SIZE*2];
sprintf(tmpTabName, "%s", table.getTableName());
char * database = strtok(tmpTabName, "/");
char * schema = strtok( NULL , "/");
char * tableName = strtok( NULL , "/");
/**
* this means that the user did not specify schema
* and it is a v2x backup
*/
if(database == NULL)
return false;
if(schema == NULL)
return false;
if(tableName==NULL)
tableName = schema;
char stmtCreateDB[255];
sprintf(stmtCreateDB,"CREATE DATABASE %s", database);
/*ignore return value. mysql_select_db will trap errors anyways*/
if (mysql_query(mysqlp,stmtCreateDB) == 0)
{
//ndbout_c("%s", stmtCreateDB);
}
if (mysql_select_db(&mysql, database) != 0)
{
ndbout_c("Error: %s", mysql_error(&mysql));
return false;
}
char buf [2048];
/**
* create table ddl
*/
if (create_table_string(table, tableName, buf))
{
ndbout_c("Unable to create a table definition since the "
"backup contains undefined types");
return false;
}
//ndbout_c("%s", buf);
if (mysql_query(mysqlp,buf) != 0)
{
ndbout_c("Error: %s", mysql_error(&mysql));
return false;
} else
{
ndbout_c("Successfully restored table %s into database %s", tableName, database);
}
return true;
}
#endif
bool
BackupRestore::table(const TableS & table){
if (!m_restore_meta)
{
return true;
}
NdbDictionary::Dictionary* dict = m_ndb->getDictionary();
if (dict->createTable(*table.m_dictTable) == -1)
{
err << "Create table " << table.getTableName() << " failed: "
<< dict->getNdbError() << endl;
return false;
}
info << "Successfully restored table " << table.getTableName()<< endl ;
return true;
}
void BackupRestore::tuple(const TupleS & tup, Uint32 fragId)
{
if (!m_restore)
{
delete &tup;
return;
}
restore_callback_t * cb = m_free_callback;
if (cb)
{
m_free_callback = cb->next;
cb->retries = 0;
cb->fragId = fragId;
cb->tup = &tup;
tuple_a(cb);
}
if (m_free_callback == 0)
{
// send-poll all transactions
// close transaction is done in callback
m_ndb->sendPollNdb(3000, 1);
}
}
void BackupRestore::tuple_a(restore_callback_t *cb)
{
while (cb->retries < 10)
{
/**
* start transactions
*/
cb->connection = m_ndb->startTransaction();
if (cb->connection == NULL)
{
/*
if (asynchErrorHandler(cb->connection, m_ndb))
{
cb->retries++;
continue;
}
*/
asynchExitHandler();
} // if
const TupleS &tup = *(cb->tup);
const TableS * table = tup.getTable();
NdbOperation * op = cb->connection->getNdbOperation(table->getTableName());
if (op == NULL)
{
if (asynchErrorHandler(cb->connection, m_ndb))
{
cb->retries++;
continue;
}
asynchExitHandler();
} // if
if (op->writeTuple() == -1)
{
if (asynchErrorHandler(cb->connection, m_ndb))
{
cb->retries++;
continue;
}
asynchExitHandler();
} // if
Uint32 ret = 0;
for (int i = 0; i < tup.getNoOfAttributes(); i++)
{
const AttributeS * attr = tup[i];
int size = attr->Desc->size;
int arraySize = attr->Desc->arraySize;
char * dataPtr = attr->Data.string_value;
Uint32 length = (size * arraySize) / 8;
if (attr->Desc->m_column->getPrimaryKey())
{
ret = op->equal(i, dataPtr, length);
}
else
{
if (attr->Data.null)
ret = op->setValue(i, NULL, 0);
else
ret = op->setValue(i, dataPtr, length);
}
if (ret<0)
{
ndbout_c("Column: %d type %d",i,
tup.getTable()->m_dictTable->getColumn(i)->getType());
if (asynchErrorHandler(cb->connection, m_ndb))
{
cb->retries++;
break;
}
asynchExitHandler();
}
}
if (ret < 0)
continue;
// Prepare transaction (the transaction is NOT yet sent to NDB)
cb->connection->executeAsynchPrepare(Commit, &callback, cb);
m_transactions++;
}
ndbout_c("Unable to recover from errors. Exiting...");
asynchExitHandler();
}
void BackupRestore::cback(int result, restore_callback_t *cb)
{
if (result<0)
{
/**
* Error. temporary or permanent?
*/
if (asynchErrorHandler(cb->connection, m_ndb))
{
cb->retries++;
tuple_a(cb);
}
else
{
ndbout_c("Restore: Failed to restore data "
"due to a unrecoverable error. Exiting...");
delete m_ndb;
delete cb->tup;
exit(-1);
}
}
else
{
/**
* OK! close transaction
*/
m_ndb->closeTransaction(cb->connection);
delete cb->tup;
m_transactions--;
}
}
void BackupRestore::asynchExitHandler()
{
if (m_ndb != NULL)
delete m_ndb;
exit(-1);
}
#if 0 // old tuple impl
void
BackupRestore::tuple(const TupleS & tup)
{
if (!m_restore)
return;
while (1)
{
NdbTransaction * trans = m_ndb->startTransaction();
if (trans == NULL)
{
// TODO: handle the error
ndbout << "Cannot start transaction" << endl;
exit(-1);
} // if
const TableS * table = tup.getTable();
NdbOperation * op = trans->getNdbOperation(table->getTableName());
if (op == NULL)
{
ndbout << "Cannot get operation: ";
ndbout << trans->getNdbError() << endl;
exit(-1);
} // if
// TODO: check return value and handle error
if (op->writeTuple() == -1)
{
ndbout << "writeTuple call failed: ";
ndbout << trans->getNdbError() << endl;
exit(-1);
} // if
for (int i = 0; i < tup.getNoOfAttributes(); i++)
{
const AttributeS * attr = tup[i];
int size = attr->Desc->size;
int arraySize = attr->Desc->arraySize;
const char * dataPtr = attr->Data.string_value;
const Uint32 length = (size * arraySize) / 8;
if (attr->Desc->m_column->getPrimaryKey())
op->equal(i, dataPtr, length);
}
for (int i = 0; i < tup.getNoOfAttributes(); i++)
{
const AttributeS * attr = tup[i];
int size = attr->Desc->size;
int arraySize = attr->Desc->arraySize;
const char * dataPtr = attr->Data.string_value;
const Uint32 length = (size * arraySize) / 8;
if (!attr->Desc->m_column->getPrimaryKey())
if (attr->Data.null)
op->setValue(i, NULL, 0);
else
op->setValue(i, dataPtr, length);
}
int ret = trans->execute(Commit);
if (ret != 0)
{
ndbout << "execute failed: ";
ndbout << trans->getNdbError() << endl;
exit(-1);
}
m_ndb->closeTransaction(trans);
if (ret == 0)
break;
}
m_dataCount++;
}
#endif
void
BackupRestore::endOfTuples()
{
if (!m_restore)
return;
// Send all transactions to NDB
m_ndb->sendPreparedTransactions(0);
// Poll all transactions
m_ndb->pollNdb(3000, m_transactions);
// Close all transactions
// for (int i = 0; i < nPreparedTransactions; i++)
// m_ndb->closeTransaction(asynchTrans[i]);
}
void
BackupRestore::logEntry(const LogEntry & tup)
{
if (!m_restore)
return;
NdbTransaction * trans = m_ndb->startTransaction();
if (trans == NULL)
{
// TODO: handle the error
ndbout << "Cannot start transaction" << endl;
exit(-1);
} // if
const TableS * table = tup.m_table;
NdbOperation * op = trans->getNdbOperation(table->getTableName());
if (op == NULL)
{
ndbout << "Cannot get operation: ";
ndbout << trans->getNdbError() << endl;
exit(-1);
} // if
int check = 0;
switch(tup.m_type)
{
case LogEntry::LE_INSERT:
check = op->insertTuple();
break;
case LogEntry::LE_UPDATE:
check = op->updateTuple();
break;
case LogEntry::LE_DELETE:
check = op->deleteTuple();
break;
default:
ndbout << "Log entry has wrong operation type."
<< " Exiting...";
exit(-1);
}
for (int i = 0; i < tup.m_values.size(); i++)
{
const AttributeS * attr = tup.m_values[i];
int size = attr->Desc->size;
int arraySize = attr->Desc->arraySize;
const char * dataPtr = attr->Data.string_value;
const Uint32 length = (size / 8) * arraySize;
if (attr->Desc->m_column->getPrimaryKey())
op->equal(attr->Desc->attrId, dataPtr, length);
else
op->setValue(attr->Desc->attrId, dataPtr, length);
}
#if 1
trans->execute(Commit);
#else
const int ret = trans->execute(Commit);
// Both insert update and delete can fail during log running
// and it's ok
if (ret != 0)
{
ndbout << "execute failed: ";
ndbout << trans->getNdbError() << endl;
exit(-1);
}
#endif
m_ndb->closeTransaction(trans);
m_logCount++;
}
void
BackupRestore::endOfLogEntrys()
{
if (m_restore)
{
ndbout << "Restored " << m_dataCount << " tuples and "
<< m_logCount << " log entries" << endl;
}
}
#if 0
/*****************************************
*
* Callback function for asynchronous transactions
*
* Idea for error handling: Transaction objects have to be stored globally when
* they are prepared.
* In the callback function if the transaction:
* succeeded: delete the object from global storage
* failed but can be retried: execute the object that is in global storage
* failed but fatal: delete the object from global storage
*
******************************************/
static void restoreCallback(int result, // Result for transaction
NdbTransaction *object, // Transaction object
void *anything) // Not used
{
static Uint32 counter = 0;
debug << "restoreCallback function called " << counter << " time(s)" << endl;
++counter;
if (result == -1)
{
ndbout << " restoreCallback (" << counter;
if ((counter % 10) == 1)
{
ndbout << "st";
} // if
else if ((counter % 10) == 2)
{
ndbout << "nd";
} // else if
else if ((counter % 10 ) ==3)
{
ndbout << "rd";
} // else if
else
{
ndbout << "th";
} // else
err << " time: error detected " << object->getNdbError() << endl;
} // if
} // restoreCallback
#endif
/*
* 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* trans, void* aObject)
{
restore_callback_t *cb = (restore_callback_t *)aObject;
(cb->restore)->cback(result, cb);
}
/**
* returns true if is recoverable,
* Error handling based on hugo
* false if it is an error that generates an abort.
*/
static
bool asynchErrorHandler(NdbTransaction * trans, Ndb* ndb)
{
NdbError error = trans->getNdbError();
ndb->closeTransaction(trans);
switch(error.status)
{
case NdbError::Success:
return false;
// ERROR!
break;
case NdbError::TemporaryError:
NdbSleep_MilliSleep(10);
return true;
// RETRY
break;
case NdbError::UnknownResult:
ndbout << error << endl;
return false;
// ERROR!
break;
default:
case NdbError::PermanentError:
switch (error.code)
{
case 499:
case 250:
NdbSleep_MilliSleep(10);
return true; //temp errors?
default:
break;
}
//ERROR
ndbout << error << endl;
return false;
break;
}
return false;
}
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