# SQLAppStartup.java

    /*
     * Copyright (c) 2010, Stanislav Muhametsin. All Rights Reserved.
     * Copyright (c) 2012, Paul Merlin. All Rights Reserved.
     *
     * Licensed  under the  Apache License,  Version 2.0  (the "License");
     * you may not use  this file  except in  compliance with the License.
     * You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed  under the  License is distributed on an "AS IS" BASIS,
     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
     * implied.
     *
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */
    package org.qi4j.index.sql.support.api;

    import java.sql.SQLException;
    import org.qi4j.api.activation.ActivatorAdapter;
    import org.qi4j.api.activation.Activators;
    import org.qi4j.api.service.ServiceReference;

    /**
     * This is the interface which is called by SQL-Indexing when it is activated. This allows implementation specific
     * initializations for RDBMS (for example, possibly re-building database structure).
     */
    @Activators( SQLAppStartup.Activator.class )
    public interface SQLAppStartup
    {

        /**
         * This method is called when connection may be safely initialized - for example, possibly (re-)building database
         * structure.
         *
         * @throws SQLException If SQL error.
         */
        void initConnection()
            throws SQLException;

        class Activator
            extends ActivatorAdapter<ServiceReference<SQLAppStartup>>
        {

            @Override
            public void afterActivation( ServiceReference<SQLAppStartup> activated )
                throws Exception
            {
                activated.get().initConnection();
            }

        }

    }