nl.strohalm.cyclos.utils.ExceptionHelper.java Source code

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Here is the source code for nl.strohalm.cyclos.utils.ExceptionHelper.java

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/*
This file is part of Cyclos (www.cyclos.org).
A project of the Social Trade Organisation (www.socialtrade.org).
    
Cyclos is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
    
Cyclos is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with Cyclos; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    
 */
package nl.strohalm.cyclos.utils;

import java.sql.SQLException;

import nl.strohalm.cyclos.entities.exceptions.LockingException;

import org.apache.commons.lang.exception.ExceptionUtils;
import org.hibernate.PessimisticLockException;
import org.hibernate.exception.LockAcquisitionException;

/**
 * Contains helper methods for exceptions
 * @author luis
 */
public class ExceptionHelper {
    // Mysql Error: 1205 SQLSTATE: HY000 (ER_LOCK_WAIT_TIMEOUT)
    private final static int ER_LOCK_WAIT_TIMEOUT = 1205;

    private final static String ST_LOCK = "40001";

    /**
     * Returns whether the given throwable represents a locking exception
     */
    public static boolean isLockingException(final Throwable t) {
        return isLockingException(t, true);
    }

    private static boolean isLockingException(final Throwable t, final boolean recurse) {
        if (t instanceof LockingException || t instanceof LockAcquisitionException
                || t instanceof PessimisticLockException) {
            return true;
        }
        if (t instanceof SQLException) {
            final SQLException e = (SQLException) t;
            return e.getErrorCode() == ER_LOCK_WAIT_TIMEOUT || ST_LOCK.equals(e.getSQLState());
        }
        if (recurse) {
            for (final Throwable thr : ExceptionUtils.getThrowables(t)) {
                if (isLockingException(thr, false)) {
                    return true;
                }
            }
        }
        return false;
    }

}