How to log connection info with Mybatis - mybatis

Question

When i have a error on a database connection, i need to log it (with Database name and username that tried to connect to the db, don't need to log the password), I use Sprig-Mybatis on my aplication.
Any ideas how to do that?
Best Regards

Answer 1

There is no other special way to do as a simple try/catch in java will get you the expection.
For example a simple program where I am calling a mybatis mapper method:
try{
List result = mapper.myBatisMapperMethod();//this is responsible to set up
//a connection and run a query
}
Suppose the above call fails due to invalid authentication say the below where my password is wrong connection
exception that I usually get in mybatis:
Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Login failed for user 'applicationUsername'.)
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Login failed for user 'applicationUsername'.)
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1225)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
... 65 more
Caused by:
com.microsoft.sqlserver.jdbc.SQLServerException: Login failed for user 'applicationUsername'.
what I do is have a simple catch to above try you can have an sql exception catched but here I use simply Exception.
catch(Exception e){
//Suppose you are using Log4j You can simply
logger.error("This is my error log message"+e.getMessage());
//The above will log any kind of exception including the authentication fail or you
can specifically log a particular kind of exception.Java wont log failed password it just logs the user who tried unless you explicitly want to log it.
}