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Testing connections

Contents

Validating a DBMS connection from the command line

How to test a two-tier connection from the command line

How to validate a multitier WebLogic JDBC connection from the command line

Troubleshooting

Validating a DBMS connection from the command line

WebLogic provides utilities that you can use to test two-tier

and three-tier JDBC database connections after you install WebLogic two-tier drivers, a WebLogic Server, or WebLogic JDBC

How to test a two-tier connection from the command line

Use the utils.dbping utility to confirm that you can make a connection between Java and your database. The dbping utility is only for testing a two-tier connection, using a WebLogic two-tier JDBC driver like jdbcKona/Oracle.

Syntax

  $ java utils.dbping DBMS user password DB

Arguments

DBMS: Use: ORACLE, SYBASE, MSSQLSERVER, MSSQLSERVER4, or INFORMIX4
user: Valid username for database login. Use the same values and format that you use with isql for SQL Server, sqlplus for Oracle, or DBACCESS for Informix.
password: Valid password for the user. Use the same values and format that you use with isql, sqlplus, or DBACCESS.
DB: Name of the database. The format varies depending on the database and version. Use the same values and format that you use with isql, sqlplus, or DBACCESS. Type 4 drivers, such as MSSQLServer4 and Informix4, need additional information to locate the server since they cannot access the environment.

Examples

Oracle

Connect to Oracle from Java with jdbcKona/Oracle using the same values that you use with sqlplus.

If you are not using SQLNet (and you have ORACLE_HOME and ORACLE_SID defined), follow this example:

  $ java utils.dbping ORACLE scott tiger

If you are using SQLNet V2, follow this example:

  $ java utils.dbping ORACLE scott tiger TNS_alias

where TNS_alias is an alias defined in your local tnsnames.ora file.

Sybase

Connect to Sybase from Java with jdbcKona/Sybase using the same values that you use with isql. If you log into isql using isql -Usa -Psecret -SDEMO, type:

  $ java utils.dbping SYBASE sa secret DEMO

Microsoft SQL Server (type 2 driver)

Connect to Microsoft SQL Server from Java with jdbcKona/MSSQLServer using the same values that you use with isql. If you log in with isql using isql -Usa -Psecret -SDEMO, type:

  $ java utils.dbping MSSQLSERVER sa secret DEMO

Microsoft SQL Server (type 4 driver)

To connect to Microsoft SQL Server from Java with jdbcKona/MSSQLServer4, you use the same values for user and password that you use with isql. To specify the SQL Server, however, you supply the name of the computer running the SQL Server and the TCP/IP port the SQL Server is listening on. To log into a SQL Server running on a computer named mars listening on port 1433, type:

  $ java utils.dbping MSSQLSERVER4 sa secret mars:1433

You could omit ":1433" in this example since 1433 is the default port number for Microsoft SQL Server.

Informix (type 4 driver)

Connect to Informix from Java with jdbcKona/Informix4 using the same values that you use with DBACCESS. The order of arguments follows the pattern:

  $ java utils.dbping INFORMIX user pass db@server:port

As shown in this example:

  $ java utils.dbping INFORMIX bill secret stores@myserver:8543

How to validate a multitier WebLogic JDBC connection from the command line

Use the utils.t3dbping utility to confirm that you can make a multitier

database connection using a WebLogic Server. The t3dbping utility is only for testing a multitier connection, after you have verified that you have a working two-tier connection, and after you have started WebLogic.

If the two-tier JDBC driver is a WebLogic jdbcKona driver, you should test the two-tier connection with utils.dbping. Otherwise, see the documentation for the two-tier JDBC driver to find out how to test that connection before you test the multitier connection.

Syntax

  $ java utils.t3dbping URL user password DB driver_class driver_URL

Arguments

URL: URL of the WebLogic Server. For more information on constructing a WebLogic URL, check Running and maintaining the WebLogic Server.
username: Valid username for the DBMS.
password: Valid password for that user.
DB: Name of the database. Use the same values and format that are shown above for testing a two-tier connection.
driver_class: Class name of the JDBC driver between WebLogic and the DBMS. For instance, if you are using jdbcKona/Oracle on the server side, the driver class name is weblogic.jdbc.oci.Driver. Note that the class name of the driver is in dot-notation format.
driver_URL: URL of the JDBC driver between WebLogic and the DBMS. For instance, if you are using jdbcKona/Oracle on the server side, the URL of the driver is jdbc:weblogic:oracle. Note that the URL of the driver is colon-separated.

Examples

These examples are displayed on multiple lines for readability. Each example should by entered as a single command.

Oracle

Here is an example of how to ping the Oracle DBMS DEMO20 running on the server bigbox, on the same host as WebLogic, which is listening on port 7001:

  $ java utils.t3dbping          // command
       t3://bigbox:7001          // WebLogic URL
       scott tiger               // user password
       DEMO20                    // DB
       weblogic.jdbc.oci.Driver  // driver class
       jdbc:weblogic:oracle      // driver URL

Sybase

This example shows how to ping the Sybase DBMS DEMODB running on the server bigbox, on the same host as WebLogic, which is listening on port 7001:

  $ java utils.t3dbping          // command
       t3://bigbox:7001          // WebLogic URL
       sa secret                 // user password
       DEMODB                    // DB
       weblogic.jdbc.dblib.Driver// driver class
       jdbc:weblogic:sybase      // driver URL

MSSQLServer

This example shows how to ping the Microsoft MS SQL Server DBMS DEMODB running on the server bigbox, on the same host as WebLogic, which is listening on port 7001:

  $ java utils.t3dbping          // command
       t3://bigbox:7001          // WebLogic URL
       sa secret                 // user password
       DEMODB                    // DB
       weblogic.jdbc.dblib.Driver// driver class
       jdbc:weblogic:mssqlserver // driver URL

Oracle with ODBC

This example shows how to ping an Oracle database using the JDBC-ODBC bridge:

  $ java utils.t3dbping             // command
       t3://bigbox:7001             // WebLogic URL
       scott tiger                  // user password
       ""                           // DB
       sun.jdbc.odbc.JdbcOdbcDriver // driver class
       jdbc:odbc:VISIORA73          // driver URL

DB2 with AS/400 type 4 JDBC driver

This example shows how to ping an AS/400 DB2 database from a workstation command shell using the IBM AS/400 type 4 JDBC driver:

  $ java utils.t3dbping                      // command
       t3://as400box:7001                    // WebLogic URL
       scott tiger                           // user password
       DEMO                                  // database 
       com.ibm.as400.access.AS400JDBCDriver  // driver class
       jdbc:as400://as400box                 // driver URL

For information on other WebLogic commands, see Running and maintaining the WebLogic Server.

Troubleshooting

If you are testing a connection to WebLogic, check the WebLogic log. By default, the log is kept in a file called weblogic.log in the weblogic/myserver directory.

UNIX users

If you encounter a problem trying to load native_login, use truss to determine the source of the problem. For example, to run tutorial.example3, type:

  $ truss -f -t open -s\!all java tutorial.example3

WinNT/Windows95 users

If you get an error message that indicates that the .dll failed to load, make sure your PATH includes the 32-bit database-related .dlls.