/*
 * eXist Open Source Native XML Database
 * Copyright (C) 2001-2016 The eXist Project
 * http://exist-db.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.exist.storage;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.exist.plugin.PluginsManagerImpl;
import org.exist.util.Configuration;

import java.util.ArrayList;
import java.util.List;

/**
 * Simple manager for Startup Triggers
 *
 * Basically just groups zero or more startup triggers
 * as a single BrokerPoolService
 */
public class StartupTriggersManager implements BrokerPoolService {

    private final static Logger LOG = LogManager.getLogger(PluginsManagerImpl.class);

    private final List<Configuration.StartupTriggerConfig> startupTriggerConfigs = new ArrayList<>();

    @Override
    public void configure(final Configuration configuration) throws BrokerPoolServiceException {
        final List<Configuration.StartupTriggerConfig> startupTriggerConfigs =
                (List<Configuration.StartupTriggerConfig>) configuration
                        .getProperty(BrokerPool.PROPERTY_STARTUP_TRIGGERS);
        if(startupTriggerConfigs != null) {
            this.startupTriggerConfigs.addAll(startupTriggerConfigs);
        }
    }

    @Override
    public void startPreMultiUserSystem(final DBBroker systemBroker) throws BrokerPoolServiceException {
        for(final Configuration.StartupTriggerConfig startupTriggerConfig : startupTriggerConfigs) {
            try {
                final Class<StartupTrigger> clazz = (Class<StartupTrigger>) Class.forName(startupTriggerConfig.getClazz());
                final StartupTrigger startupTrigger = clazz.newInstance();
                startupTrigger.execute(systemBroker, startupTriggerConfig.getParams());
            } catch(final ClassNotFoundException | IllegalAccessException | InstantiationException e) {
                LOG.error("Could not call StartupTrigger class: " + startupTriggerConfig + ". SKIPPING! " + e.getMessage(), e);
            } catch(final RuntimeException re) {
                LOG.warn("StartupTrigger threw RuntimeException: " + re.getMessage() + ". IGNORING!", re);
            }
        }
    }
}