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Makefile.am:
updated doxygen Makefile for changed examples directory .del-demos.tar~8e6dfbc510a6e323: Delete: ndb/ndbapi-examples/configurations/demos.tar Many files: mvdir
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tomas@poseidon.ndb.mysql.com
278
ndb/ndbapi-examples/ndbapi_simple_example/ndbapi_simple.cpp
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278
ndb/ndbapi-examples/ndbapi_simple_example/ndbapi_simple.cpp
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/* 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_simple.cpp: Using synchronous transactions in NDB API
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*
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* Correct output from this program is:
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*
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* ATTR1 ATTR2
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* 0 10
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* 1 1
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* 2 12
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* Detected that deleted tuple doesn't exist!
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* 4 14
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* 5 5
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* 6 16
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* 7 7
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* 8 18
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* 9 9
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*
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*/
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#include <mysql.h>
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#include <NdbApi.hpp>
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// Used for cout
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#include <stdio.h>
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#include <iostream>
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static void run_application(MYSQL &, Ndb_cluster_connection &);
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#define PRINT_ERROR(code,msg) \
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std::cout << "Error in " << __FILE__ << ", line: " << __LINE__ \
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<< ", code: " << code \
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<< ", msg: " << msg << "." << std::endl
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#define MYSQLERROR(mysql) { \
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PRINT_ERROR(mysql_errno(&mysql),mysql_error(&mysql)); \
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exit(-1); }
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#define APIERROR(error) { \
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PRINT_ERROR(error.code,error.message); \
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exit(-1); }
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int main()
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{
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// ndb_init must be called first
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ndb_init();
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// connect to mysql server and cluster and run application
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{
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// Object representing the cluster
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Ndb_cluster_connection cluster_connection;
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// Connect to cluster management server (ndb_mgmd)
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if (cluster_connection.connect(4 /* retries */,
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5 /* delay between retries */,
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1 /* verbose */))
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{
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std::cout << "Cluster management server was not ready within 30 secs.\n";
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exit(-1);
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}
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// Optionally connect and wait for the storage nodes (ndbd's)
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if (cluster_connection.wait_until_ready(30,0) < 0)
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{
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std::cout << "Cluster was not ready within 30 secs.\n";
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exit(-1);
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}
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// connect to mysql server
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MYSQL mysql;
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if ( !mysql_init(&mysql) ) {
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std::cout << "mysql_init failed\n";
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exit(-1);
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}
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if ( !mysql_real_connect(&mysql, "localhost", "root", "", "",
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3306, "/tmp/mysql.sock", 0) )
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MYSQLERROR(mysql);
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// run the application code
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run_application(mysql, cluster_connection);
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}
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ndb_end(0);
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std::cout << "\nTo drop created table use:\n"
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<< "echo \"drop table MYTABLENAME\" | mysql TEST_DB_1 -u root\n";
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return 0;
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}
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static void create_table(MYSQL &);
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static void do_insert(Ndb &);
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static void do_update(Ndb &);
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static void do_delete(Ndb &);
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static void do_read(Ndb &);
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static void run_application(MYSQL &mysql,
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Ndb_cluster_connection &cluster_connection)
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{
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/********************************************
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* Connect to database via mysql-c *
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********************************************/
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mysql_query(&mysql, "CREATE DATABASE TEST_DB_1");
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if (mysql_query(&mysql, "USE TEST_DB_1") != 0) MYSQLERROR(mysql);
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create_table(mysql);
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/********************************************
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* Connect to database via NdbApi *
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********************************************/
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// Object representing the database
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Ndb myNdb( &cluster_connection, "TEST_DB_1" );
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if (myNdb.init()) APIERROR(myNdb.getNdbError());
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/*
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* Do different operations on database
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*/
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do_insert(myNdb);
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do_update(myNdb);
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do_delete(myNdb);
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do_read(myNdb);
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}
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/*********************************************************
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* Create a table named MYTABLENAME if it does not exist *
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*********************************************************/
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static void create_table(MYSQL &mysql)
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{
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if (mysql_query(&mysql,
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"CREATE TABLE"
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" MYTABLENAME"
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" (ATTR1 INT UNSIGNED NOT NULL PRIMARY KEY,"
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" ATTR2 INT UNSIGNED NOT NULL)"
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" ENGINE=NDB"))
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MYSQLERROR(mysql);
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}
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/**************************************************************************
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* Using 5 transactions, insert 10 tuples in table: (0,0),(1,1),...,(9,9) *
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**************************************************************************/
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static void do_insert(Ndb &myNdb)
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{
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const NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
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const NdbDictionary::Table *myTable= myDict->getTable("MYTABLENAME");
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if (myTable == NULL)
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APIERROR(myDict->getNdbError());
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for (int i = 0; i < 5; i++) {
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NdbTransaction *myTransaction= myNdb.startTransaction();
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if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
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NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
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if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
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myOperation->insertTuple();
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myOperation->equal("ATTR1", i);
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myOperation->setValue("ATTR2", i);
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myOperation= myTransaction->getNdbOperation(myTable);
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if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
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myOperation->insertTuple();
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myOperation->equal("ATTR1", i+5);
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myOperation->setValue("ATTR2", i+5);
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if (myTransaction->execute( NdbTransaction::Commit ) == -1)
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APIERROR(myTransaction->getNdbError());
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myNdb.closeTransaction(myTransaction);
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}
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}
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/*****************************************************************
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* Update the second attribute in half of the tuples (adding 10) *
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*****************************************************************/
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static void do_update(Ndb &myNdb)
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{
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const NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
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const NdbDictionary::Table *myTable= myDict->getTable("MYTABLENAME");
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if (myTable == NULL)
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APIERROR(myDict->getNdbError());
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for (int i = 0; i < 10; i+=2) {
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NdbTransaction *myTransaction= myNdb.startTransaction();
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if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
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NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
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if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
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myOperation->updateTuple();
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myOperation->equal( "ATTR1", i );
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myOperation->setValue( "ATTR2", i+10);
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if( myTransaction->execute( NdbTransaction::Commit ) == -1 )
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APIERROR(myTransaction->getNdbError());
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myNdb.closeTransaction(myTransaction);
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}
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}
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/*************************************************
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* Delete one tuple (the one with primary key 3) *
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*************************************************/
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static void do_delete(Ndb &myNdb)
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{
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const NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
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const NdbDictionary::Table *myTable= myDict->getTable("MYTABLENAME");
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if (myTable == NULL)
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APIERROR(myDict->getNdbError());
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NdbTransaction *myTransaction= myNdb.startTransaction();
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if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
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NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
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if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
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myOperation->deleteTuple();
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myOperation->equal( "ATTR1", 3 );
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if (myTransaction->execute(NdbTransaction::Commit) == -1)
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APIERROR(myTransaction->getNdbError());
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myNdb.closeTransaction(myTransaction);
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}
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/*****************************
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* Read and print all tuples *
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*****************************/
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static void do_read(Ndb &myNdb)
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{
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const NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
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const NdbDictionary::Table *myTable= myDict->getTable("MYTABLENAME");
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if (myTable == NULL)
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APIERROR(myDict->getNdbError());
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std::cout << "ATTR1 ATTR2" << std::endl;
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for (int i = 0; i < 10; i++) {
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NdbTransaction *myTransaction= myNdb.startTransaction();
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if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
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NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
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if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
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myOperation->readTuple(NdbOperation::LM_Read);
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myOperation->equal("ATTR1", i);
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NdbRecAttr *myRecAttr= myOperation->getValue("ATTR2", NULL);
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if (myRecAttr == NULL) APIERROR(myTransaction->getNdbError());
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if(myTransaction->execute( NdbTransaction::Commit ) == -1)
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if (i == 3) {
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std::cout << "Detected that deleted tuple doesn't exist!" << std::endl;
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} else {
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APIERROR(myTransaction->getNdbError());
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}
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if (i != 3) {
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printf(" %2d %2d\n", i, myRecAttr->u_32_value());
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}
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myNdb.closeTransaction(myTransaction);
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}
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}
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