/****************************************************************************
** (c) Copyright IBM Corp. 2007 All rights reserved.
**
** The following sample of source code ("Sample") is owned by International
** Business Machines Corporation or one of its subsidiaries ("IBM") and is
** copyrighted and licensed, not sold. You may use, copy, modify, and
** distribute the Sample in any form without payment to IBM, for the purpose of
** assisting you in the development of your applications.
**
** The Sample code is provided to you on an "AS IS" basis, without warranty of
** any kind. IBM HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR
** IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do
** not allow for the exclusion or limitation of implied warranties, so the above
** limitations or exclusions may not apply to you. IBM shall not be liable for
** any damages you suffer as a result of using, copying, modifying or
** distributing the Sample, even if IBM has been advised of the possibility of
** such damages.
*****************************************************************************
**
** SOURCE FILE NAME: dbmcon.sqC
**
** SAMPLE: How to use multiple databases
**
** This sample program requires a second database
** that has to be created as follows:
** - locally:
** db2 create db sample2
** - remotely:
** db2 attach to node_name
** db2 create db sample2
** db2 detach
** db2 catalog db sample2 as sample2 at node node_name
** If another name is used for the second database,
** it can be specified in the command line arguments
** as follows:
** dbmcon [dbAlias1 dbAlias2 [user1 pswd1 [user2 pswd2]]
** The second database can be dropped as follows:
** - locally:
** db2 drop db sample2
** - remotely:
** db2 attach to node_name
** db2 drop db sample2
** db2 detach
** db2 uncatalog db sample2
**
** This sample also requires that the TCPIP listener is running. To
** ensure this, do the following:
** 1. Set the environment variable DB2COMM to TCPIP as follows:
** "db2set DB2COMM=TCPIP"
** 2. Update the database manager configuration file with the TCP/IP
** service name as specified in the services file:
** "db2 update dbm cfg using SVCENAME <TCP/IP service name>"
** You must do a "db2stop" and "db2start" for this setting to take
** effect.
**
** DB2 API USED:
** sqlesetc -- SET CLIENT
**
** SQL STATEMENTS USED:
** CONNECT
** SET CONNECTION
** DISCONNECT
**
**
*****************************************************************************
**
** For more information on the sample programs, see the README file.
**
** For information on developing C++ applications, see the Application
** Development Guide.
**
** For information on using SQL statements, see the SQL Reference.
**
** For information on DB2 APIs, see the Administrative API Reference.
**
** For the latest information on programming, compiling, and running DB2
** applications, visit the DB2 Information Center at
** http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/index.jsp
****************************************************************************/
#include <string.h>
#include <sqlenv.h>
#include <sqlutil.h>
#include "utilemb.h"
#include "dbmcon1.h"
#include "dbmcon2.h"
#if ((__cplusplus >= 199711L) && !defined DB2HP && !defined DB2AIX) || \
(DB2LINUX && (__LP64__ || (__GNUC__ >= 3)) )
#include <iomanip>
#include <iostream>
using namespace std;
#else
#include <iomanip.h>
#include <iostream.h>
#endif
EXEC SQL BEGIN DECLARE SECTION;
char dbAlias1[15];
char dbAlias2[15];
char user1[129];
char user2[129];
char pswd1[15];
char pswd2[15];
EXEC SQL END DECLARE SECTION;
class DbMCon
{
public:
int TwoDbConnectType1();
int TwoDbConnectType2OnePhaseCommit();
};
int DbMCon::TwoDbConnectType1()
{
int rc = 0;
struct sqlca sqlca;
struct sqle_conn_setting clientAppInfo[2];
DbMCon1 firstDb;
DbMCon2 secondDb;
cout << "\n-----------------------------------------------------------";
cout << "\nUSE THE DB2 API:" << endl;
cout << " sqlesetc -- SET CLIENT" << endl;
cout << "AND THE SQL STATEMENTS:" << endl;
cout << " CONNECT" << endl;
cout << " COMMIT" << endl;
cout << " CONNECT RESET" << endl;
cout << "TO CONNECT 'TYPE1' TO TWO DATABASES." << endl;
// set client connection attributes
cout << "\n Set the Client Connection Attributes to the values:" << endl;
cout << " SQL_CONNECT_TYPE = SQL_CONNECT_1" << endl;
cout << " SQL_DISCONNECT = SQL_DISCONNECT_EXPL" << endl;
clientAppInfo[0].type = SQL_CONNECT_TYPE;
clientAppInfo[0].value = SQL_CONNECT_1;
clientAppInfo[1].type = SQL_DISCONNECT;
clientAppInfo[1].value = SQL_DISCONNECT_EXPL;
// set client information
sqlesetc(&clientAppInfo[0], 2, &sqlca);
DB2_API_CHECK("Client Connection Attributes -- set");
// work with databases
/* ------------------------------------- */
cout << "\n CONNECT TO " << dbAlias1 << endl;
if (strlen(user1) > 0)
{
EXEC SQL CONNECT TO :dbAlias1 USER :user1 USING :pswd1;
}
else
{
EXEC SQL CONNECT TO :dbAlias1;
}
EMB_SQL_CHECK("first database -- connect");
rc = firstDb.CreateTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
cout << " CONNECT RESET" << endl;
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
/* ------------------------------------- */
cout << "\n CONNECT TO " << dbAlias2 << endl;
if (strlen(user2) > 0)
{
EXEC SQL CONNECT TO :dbAlias2 USER :user2 USING :pswd2;
}
else
{
EXEC SQL CONNECT TO :dbAlias2;
}
EMB_SQL_CHECK("second database -- connect");
rc = secondDb.CreateTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
cout << " CONNECT RESET" << endl;
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
/* ------------------------------------- */
cout << "\n CONNECT TO " << dbAlias1 << endl;
if (strlen(user1) > 0)
{
EXEC SQL CONNECT TO :dbAlias1 USER :user1 USING :pswd1;
}
else
{
EXEC SQL CONNECT TO :dbAlias1;
}
EMB_SQL_CHECK("first database -- connect");
rc = firstDb.DropTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
cout << " CONNECT RESET" << endl;
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
/* ------------------------------------- */
cout << "\n CONNECT TO " << dbAlias2 << endl;
if (strlen(user2) > 0)
{
EXEC SQL CONNECT TO :dbAlias2 USER :user2 USING :pswd2;
}
else
{
EXEC SQL CONNECT TO :dbAlias2;
}
EMB_SQL_CHECK("first database -- connect");
rc = secondDb.DropTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
cout << " CONNECT RESET" << endl;
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
return 0;
} //DbMCon::TwoDbConnectType1
int DbMCon::TwoDbConnectType2OnePhaseCommit()
{
int rc = 0;
struct sqlca sqlca;
struct sqle_conn_setting clientAppInfo[3];
DbMCon1 firstDb;
DbMCon2 secondDb;
cout << "\n-----------------------------------------------------------";
cout << "\nUSE THE DB2 API:" << endl;
cout << " sqlesetc -- SET CLIENT" << endl;
cout << "AND THE SQL STATEMENTS:" << endl;
cout << " CONNECT" << endl;
cout << " SET CONNECTION" << endl;
cout << " COMMIT" << endl;
cout << " DISCONNECT" << endl;
cout << "TO CONNECT 'TYPE2 - ONE PHASE' TO TWO DATABASES." << endl;
// set client connection attributes
cout << "\n Set the Client Connection Attributes to the values:" << endl;
cout << " SQL_CONNECT_TYPE = SQL_CONNECT_2" << endl;
cout << " SQL_DISCONNECT = SQL_DISCONNECT_EXPL" << endl;
cout << " SQL_SYNCPOINT = SQL_SYNC_ONEPHASE" << endl;
clientAppInfo[0].type = SQL_CONNECT_TYPE;
clientAppInfo[0].value = SQL_CONNECT_2;
clientAppInfo[1].type = SQL_DISCONNECT;
clientAppInfo[1].value = SQL_DISCONNECT_EXPL;
clientAppInfo[2].type = SQL_SYNCPOINT;
clientAppInfo[2].value = SQL_SYNC_ONEPHASE;
// set client information
sqlesetc(&clientAppInfo[0], 3, &sqlca);
DB2_API_CHECK("Client Connection Attributes -- set");
// work with databases
/* ------------------------------------- */
cout << "\n CONNECT TO " << dbAlias1 << endl;
if (strlen(user1) > 0)
{
EXEC SQL CONNECT TO :dbAlias1 USER :user1 USING :pswd1;
}
else
{
EXEC SQL CONNECT TO :dbAlias1;
}
EMB_SQL_CHECK("first database -- connect");
cout << "\n CONNECT TO " << dbAlias2 << endl;
if (strlen(user2) > 0)
{
EXEC SQL CONNECT TO :dbAlias2 USER :user2 USING :pswd2;
}
else
{
EXEC SQL CONNECT TO :dbAlias2;
}
EMB_SQL_CHECK("second database -- connect");
/* ------------------------------------- */
cout << "\n SET CONNECTION " << dbAlias1 << endl;
EXEC SQL SET CONNECTION :dbAlias1;
EMB_SQL_CHECK("first connection -- activate");
rc = firstDb.CreateTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
/* ------------------------------------- */
cout << "\n SET CONNECTION " << dbAlias2 << endl;
EXEC SQL SET CONNECTION :dbAlias2;
EMB_SQL_CHECK("second connection -- activate");
rc = secondDb.CreateTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
/* ------------------------------------- */
cout << "\n SET CONNECTION " << dbAlias1 << endl;
EXEC SQL SET CONNECTION :dbAlias1;
EMB_SQL_CHECK("first connection -- activate");
rc = firstDb.DropTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
/* ------------------------------------- */
cout << "\n SET CONNECTION " << dbAlias2 << endl;
EXEC SQL SET CONNECTION :dbAlias2;
EMB_SQL_CHECK("second connection -- activate");
rc = secondDb.DropTable();
cout << " COMMIT" << endl;
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
/* ------------------------------------- */
cout << "\n DISCONNECT ALL" << endl;
EXEC SQL DISCONNECT ALL;
EMB_SQL_CHECK("all connections -- disconnect");
return 0;
} //DbMCon::TwoDbConnectType2OnePhaseCommit
int main(int argc, char *argv[])
{
int rc = 0;
CmdLineArgs check;
DbMCon con;
DbEmb db1;
DbEmb db2;
// check the command line arguments
rc = check.CmdLineArgsCheck4(argc, argv, db1, db2);
if (rc != 0)
{
return (rc);
}
strcpy(dbAlias1, db1.getAlias());
strcpy(user1, db1.getUser());
strcpy(pswd1, db1.getPswd());
strcpy(dbAlias2, db2.getAlias());
strcpy(user2, db2.getUser());
strcpy(pswd2, db2.getPswd());
cout << "\nTHIS SAMPLE SHOWS HOW TO USE MULTIPLE DATABASES." << endl;
rc = con.TwoDbConnectType1();
rc = con.TwoDbConnectType2OnePhaseCommit();
return 0;
} //main