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Catch an Exception when calling createEntityManagerFactory?

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paulkuhn

Post subject: Catch an Exception when calling createEntityManagerFactory?

Posted: Sat Oct 25, 2008 2:18 pm

Newbie

Joined: Sat Oct 25, 2008 2:09 pm
Posts: 6

Hi,
I am wondering how I can catch a possible exception using Hibernate JPA, when creating a new instance with EntityManagerFactory? I am working with Hibernate 3.3.1 and Entitymanager 3.4.0.

For example if the database is not reachable or so, I would like to catch the exception, however I have not succeeded to do so. Catching the Throwable does not work either.

Here is my code.

Code:

try {
  EntityManagerFactory emf = Persistence.createEntityManagerFactory("my_database", null);
} catch (Throwable t) {
  // I want to go here if something goes wrong...
  System.out.println("** Error: " + t.getMessage());
}

Any hints on how to do this?
Thanks!
Paul

Last edited by paulkuhn on Sun Oct 26, 2008 4:04 pm, edited 1 time in total.

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paulkuhn

Post subject: Unable to catch Exception...

Posted: Sun Oct 26, 2008 4:03 pm

Newbie

Joined: Sat Oct 25, 2008 2:09 pm
Posts: 6

Basically I am not able to catch an Exception in case the database is not available and I am calling

Persistence.createEntityManagerFactory(...);

Any ideas how to catch the exception?

This is a StackTrace that is thrown, but the my catch block is not reached:

Code:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
     at com.mysql.jdbc.Util.getInstance(Util.java:381)
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
     at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2253)
     at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
     at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
     at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
     at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
     at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)
     at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
     at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
     at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
     at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
     at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
     …

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moe5k

Post subject: Re: Catch an Exception when calling createEntityManagerFactory?

Posted: Sun Aug 21, 2011 8:41 am

Beginner

Joined: Sat Mar 27, 2010 11:03 am
Posts: 27
Location: Berlin

Hi,

i know its an old post !

I have the same Problem here ... how can i catch this Exception while connecting to the DB?

thx
moe

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