/* 
 * Copyright 2004-2005 OpenSymphony 
 * 
 * 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.
 * 
 */

/*
 * Previously Copyright (c) 2001-2004 James House
 */
package org.quartz.impl.jdbcjobstore;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
import java.util.Set;

import org.quartz.Calendar;
import org.quartz.CronTrigger;
import org.quartz.JobDataMap;
import org.quartz.JobDetail;
import org.quartz.SimpleTrigger;
import org.quartz.Trigger;
import org.quartz.spi.ClassLoadHelper;
import org.quartz.utils.Key;
import org.quartz.utils.TriggerStatus;

/**
 * <p>
 * This is the base interface for all driver delegate classes.
 * </p>
 * 
 * <p>
 * This interface is very similar to the <code>{@link
 * org.quartz.spi.JobStore}</code>
 * interface except each method has an additional <code>{@link java.sql.Connection}</code>
 * parameter.
 * </p>
 * 
 * <p>
 * Unless a database driver has some <strong>extremely-DB-specific</strong>
 * requirements, any DriverDelegate implementation classes should extend the
 * <code>{@link org.quartz.impl.jdbcjobstore.StdJDBCDelegate}</code> class.
 * </p>
 * 
 * @author <a href="mailto:jeff@binaryfeed.org">Jeffrey Wescott</a>
 * @author James House
 */
interface DriverDelegate {

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Interface.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    //---------------------------------------------------------------------------
    // startup / recovery
    //---------------------------------------------------------------------------
    /**
     * <p>
     * Update all triggers having one of the two given states, to the given new
     * state.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param newState
     *          the new state for the triggers
     * @param oldState1
     *          the first old state to update
     * @param oldState2
     *          the second old state to update
     * @return number of rows updated
     */
    int updateTriggerStatesFromOtherStates(Connection conn,
        String newState, String oldState1, String oldState2)
        throws SQLException;

    /**
     * <p>
     * Get the names of all of the triggers that have misfired - according to
     * the given timestamp.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>{@link
     * org.quartz.utils.Key}</code> objects
     */
    Key[] selectMisfiredTriggers(Connection conn, long ts)
        throws SQLException;

    /**
     * <p>
     * Get the names of all of the triggers in the given state that have
     * misfired - according to the given timestamp.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>{@link
     * org.quartz.utils.Key}</code> objects
     */
    Key[] selectMisfiredTriggersInState(Connection conn, String state,
        long ts) throws SQLException;
    
    /**
     * <p>
     * Get the names of all of the triggers in the given states that have
     * misfired - according to the given timestamp.  No more than count will
     * be returned.
     * </p>
     * 
     * @param conn the DB Connection
     * @param count the most misfired triggers to return, negative for all
     * @param resultList Output parameter.  A List of 
     *      <code>{@link org.quartz.utils.Key}</code> objects.  Must not be null.
     *          
     * @return Whether there are more misfired triggers left to find beyond
     *         the given count.
     */
    boolean selectMisfiredTriggersInStates(Connection conn, String state1, String state2,
        long ts, int count, List resultList) throws SQLException;
    
    /**
     * <p>
     * Get the number of triggers in the given states that have
     * misfired - according to the given timestamp.
     * </p>
     * 
     * @param conn the DB Connection
     */
    int countMisfiredTriggersInStates(
        Connection conn, String state1, String state2, long ts) throws SQLException;

    /**
     * <p>
     * Get the names of all of the triggers in the given group and state that
     * have misfired - according to the given timestamp.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>{@link
     * org.quartz.utils.Key}</code> objects
     */
    Key[] selectMisfiredTriggersInGroupInState(Connection conn,
        String groupName, String state, long ts) throws SQLException;
    

    /**
     * <p>
     * Select all of the triggers for jobs that are requesting recovery. The
     * returned trigger objects will have unique "recoverXXX" trigger names and
     * will be in the <code>{@link
     * org.quartz.Scheduler}.DEFAULT_RECOVERY_GROUP</code>
     * trigger group.
     * </p>
     * 
     * <p>
     * In order to preserve the ordering of the triggers, the fire time will be
     * set from the <code>COL_FIRED_TIME</code> column in the <code>TABLE_FIRED_TRIGGERS</code>
     * table. The caller is responsible for calling <code>computeFirstFireTime</code>
     * on each returned trigger. It is also up to the caller to insert the
     * returned triggers to ensure that they are fired.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>{@link org.quartz.Trigger}</code> objects
     */
    Trigger[] selectTriggersForRecoveringJobs(Connection conn)
        throws SQLException, IOException, ClassNotFoundException;

    /**
     * <p>
     * Delete all fired triggers.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return the number of rows deleted
     */
    int deleteFiredTriggers(Connection conn) throws SQLException;

    /**
     * <p>
     * Delete all fired triggers of the given instance.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return the number of rows deleted
     */
    int deleteFiredTriggers(Connection conn, String instanceId)
        throws SQLException;

    /**
     * <p>
     * Delete all volatile fired triggers.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return the number of rows deleted
     */
    int deleteVolatileFiredTriggers(Connection conn) throws SQLException;

    /**
     * <p>
     * Get the names of all of the triggers that are volatile.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>{@link
     * org.quartz.utils.Key}</code> objects
     */
    Key[] selectVolatileTriggers(Connection conn) throws SQLException;

    /**
     * <p>
     * Get the names of all of the jobs that are volatile.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>{@link
     * org.quartz.utils.Key}</code> objects
     */
    Key[] selectVolatileJobs(Connection conn) throws SQLException;

    //---------------------------------------------------------------------------
    // jobs
    //---------------------------------------------------------------------------

    /**
     * <p>
     * Insert the job detail record.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param job
     *          the job to insert
     * @return number of rows inserted
     * @throws IOException
     *           if there were problems serializing the JobDataMap
     */
    int insertJobDetail(Connection conn, JobDetail job)
        throws IOException, SQLException;

    /**
     * <p>
     * Update the job detail record.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param job
     *          the job to update
     * @return number of rows updated
     * @throws IOException
     *           if there were problems serializing the JobDataMap
     */
    int updateJobDetail(Connection conn, JobDetail job)
        throws IOException, SQLException;

    /**
     * <p>
     * Get the names of all of the triggers associated with the given job.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the job name
     * @param groupName
     *          the job group
     * @return an array of <code>{@link
     * org.quartz.utils.Key}</code> objects
     */
    Key[] selectTriggerNamesForJob(Connection conn, String jobName,
        String groupName) throws SQLException;

    /**
     * <p>
     * Delete all job listeners for the given job.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the name of the job
     * @param groupName
     *          the group containing the job
     * @return the number of rows deleted
     */
    int deleteJobListeners(Connection conn, String jobName,
        String groupName) throws SQLException;

    /**
     * <p>
     * Delete the job detail record for the given job.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the name of the job
     * @param groupName
     *          the group containing the job
     * @return the number of rows deleted
     */
    int deleteJobDetail(Connection conn, String jobName, String groupName)
        throws SQLException;

    /**
     * <p>
     * Check whether or not the given job is stateful.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the name of the job
     * @param groupName
     *          the group containing the job
     * @return true if the job exists and is stateful, false otherwise
     */
    boolean isJobStateful(Connection conn, String jobName,
        String groupName) throws SQLException;

    /**
     * <p>
     * Check whether or not the given job exists.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the name of the job
     * @param groupName
     *          the group containing the job
     * @return true if the job exists, false otherwise
     */
    boolean jobExists(Connection conn, String jobName, String groupName)
        throws SQLException;

    /**
     * <p>
     * Update the job data map for the given job.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param job
     *          the job to update
     * @return the number of rows updated
     * @throws IOException
     *           if there were problems serializing the JobDataMap
     */
    int updateJobData(Connection conn, JobDetail job)
        throws IOException, SQLException;

    /**
     * <p>
     * Associate a listener with a job.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param job
     *          the job to associate with the listener
     * @param listener
     *          the listener to insert
     * @return the number of rows inserted
     */
    int insertJobListener(Connection conn, JobDetail job, String listener)
        throws SQLException;

    /**
     * <p>
     * Get all of the listeners for a given job.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the job name whose listeners are wanted
     * @param groupName
     *          the group containing the job
     * @return array of <code>String</code> listener names
     */
    String[] selectJobListeners(Connection conn, String jobName,
        String groupName) throws SQLException;

    /**
     * <p>
     * Select the JobDetail object for a given job name / group name.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param jobName
     *          the job name whose listeners are wanted
     * @param groupName
     *          the group containing the job
     * @return the populated JobDetail object
     * @throws ClassNotFoundException
     *           if a class found during deserialization cannot be found or if
     *           the job class could not be found
     * @throws IOException
     *           if deserialization causes an error
     */
    JobDetail selectJobDetail(Connection conn, String jobName,
        String groupName, ClassLoadHelper loadHelper)
        throws ClassNotFoundException, IOException, SQLException;

    /**
     * <p>
     * Select the total number of jobs stored.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return the total number of jobs stored
     */
    int selectNumJobs(Connection conn) throws SQLException;

    /**
     * <p>
     * Select all of the job group names that are stored.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @return an array of <code>String</code> group names
     */
    String[] selectJobGroups(Connection conn) throws SQLException;

    /**
     * <p>
     * Select all of the jobs contained in a given group.
     * </p>
     * 
     * @param conn
     *          the DB Connection
     * @param groupName
     *          the group containing the jobs
     * @return an array of <code>String</code> job names
     */
    String[] selectJobsInGroup(Connection conn, String groupName)
        throws SQLException;

    //---------------------------------------------------------------------------
    // triggers
    //---------------------------------------------------------------------------

    /**
     * <p>
     * Insert the base trigger data.
     * </p>
     * 
     * @param conn