at.gv.egovernment.moa.id.storage.DBExceptionStoreImpl.java Source code

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Here is the source code for at.gv.egovernment.moa.id.storage.DBExceptionStoreImpl.java

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/*******************************************************************************
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 *******************************************************************************/
package at.gv.egovernment.moa.id.storage;

import java.util.Date;
import java.util.List;

import org.apache.commons.lang.SerializationUtils;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;

import at.gv.egovernment.moa.id.commons.db.MOASessionDBUtils;
import at.gv.egovernment.moa.id.commons.db.dao.session.ExceptionStore;
import at.gv.egovernment.moa.id.commons.db.ex.MOADatabaseException;
import at.gv.egovernment.moa.id.util.Random;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.MiscUtil;

public class DBExceptionStoreImpl implements IExceptionStore {

    private static DBExceptionStoreImpl store;

    public static DBExceptionStoreImpl getStore() {
        if (store == null) {
            store = new DBExceptionStoreImpl();
        }
        return store;
    }

    public String storeException(Throwable e) {
        String id = Random.nextRandom();

        Logger.debug("Store Exception with ID " + id);

        ExceptionStore dbexception = new ExceptionStore();
        dbexception.setExid(id);

        byte[] data = SerializationUtils.serialize(e);
        dbexception.setException(data);

        dbexception.setTimestamp(new Date());

        try {
            MOASessionDBUtils.saveOrUpdate(dbexception);

        } catch (MOADatabaseException e1) {
            Logger.warn("Exception can not be stored in Database.", e);
            return null;
        }

        return id;
    }

    public Throwable fetchException(String id) {

        try {
            Logger.debug("Fetch Exception with ID " + id);

            ExceptionStore ex = searchInDatabase(id);

            Object data = SerializationUtils.deserialize(ex.getException());
            if (data instanceof Throwable)
                return (Throwable) data;

            else {
                Logger.warn("Exeption is not of classtype Throwable");
                return null;
            }

        } catch (MOADatabaseException e) {
            Logger.info("No Exception found with ID=" + id);
            return null;

        } catch (Exception e) {
            Logger.warn("Exception can not deserialized from Database.", e);
            return null;
        }

    }

    public void removeException(String id) {
        try {
            ExceptionStore ex = searchInDatabase(id);
            MOASessionDBUtils.delete(ex);

            Logger.debug("Delete Execption with ID " + id);

        } catch (MOADatabaseException e) {
            Logger.info("No Exception found with ID=" + id);
        }

    }

    public void clean(long now, long exceptionTimeOut) {
        Date expioredate = new Date(now - exceptionTimeOut);

        List<ExceptionStore> results;
        Session session = MOASessionDBUtils.getCurrentSession();

        synchronized (session) {
            session.beginTransaction();
            Query query = session.getNamedQuery("getExceptionWithTimeOut");
            query.setTimestamp("timeout", expioredate);
            results = query.list();
            session.getTransaction().commit();
        }

        if (results.size() != 0) {
            for (ExceptionStore result : results) {
                try {
                    MOASessionDBUtils.delete(result);
                    Logger.info("Remove Exception with ID=" + result.getExid() + " after timeout.");

                } catch (HibernateException e) {
                    Logger.warn("Exception with ID=" + result.getExid()
                            + " not removed after timeout! (Error during Database communication)", e);
                }

            }
        }
    }

    @SuppressWarnings("rawtypes")
    private ExceptionStore searchInDatabase(String id) throws MOADatabaseException {
        MiscUtil.assertNotNull(id, "exceptionID");
        Logger.trace("Getting Exception with ID " + id + " from database.");
        Session session = MOASessionDBUtils.getCurrentSession();
        List result;

        synchronized (session) {
            session.beginTransaction();
            Query query = session.getNamedQuery("getExceptionWithID");
            query.setParameter("id", id);
            result = query.list();

            //send transaction
            session.getTransaction().commit();
        }

        Logger.trace("Found entries: " + result.size());

        //Assertion requires an unique artifact
        if (result.size() != 1) {
            Logger.trace("No entries found.");
            throw new MOADatabaseException("No Exception found with ID " + id);
        }

        return (ExceptionStore) result.get(0);
    }

}