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Catch persistence java.sql.sqlintegrityconstraintviolationexception

Handling SQL Integrity Constraint Violation Exceptions

This tutorial will guide you through handling `SQLIntegrityConstraintViolationException` when persisting objects that violate database constraints.

Step 1: Catch the EJB Exception

Catch a `javax.ejb.EJBException` which wraps the underlying exception.

try {
    // persistence transactions
} catch (Exception e) {
    if (e instanceof javax.ejb.EJBException) {
        logger.debug("Exception instance of javax.ejb.EjbException");
    }
}


Step 2: Get the Underlying Exception

Get the underlying exception from the `EJBException` using `e.getCause()`.

try {
    // persistence transactions
} catch (Exception e) {
    if (e instanceof javax.ejb.EJBException) {
        logger.debug("Exception instance of javax.ejb.EjbException");
        Throwable cause = e.getCause();
        if (cause != null) {
            cause = cause.getCause();
            if (cause instanceof org.hibernate.exception.ConstraintViolationException) {
                // Handle ConstraintViolationException
            }
        }
    } else {
        e.printStackTrace();
    }
}

Step 3: Check for Constraint Violation Exception

Check if the underlying exception is an instance of `ConstraintViolationException`.

try {
    // persistence transactions
} catch (Exception e) {
    if (e instanceof javax.ejb.EJBException) {
        logger.debug("Exception instance of javax.ejb.EjbException");
        Throwable cause = e.getCause();
        if (cause != null) {
            cause = cause.getCause();
            if (cause instanceof org.hibernate.exception.ConstraintViolationException) {
                // Handle ConstraintViolationException
                logger.info("update_duplicate_response | " + update_response);
            }
        }
    } else {
        e.printStackTrace();
    }
}

Remember

* Catch `javax.ejb.EJBException` to handle the underlying exception.
* Use `e.getCause()` to get the underlying exception.
* Check if the underlying exception is an instance of `ConstraintViolationException`.
* Handle the exception accordingly.


Happy coding.


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