/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jms.jdbc;
import com.caucho.config.ConfigException;
import com.caucho.jdbc.JdbcMetaData;
import com.caucho.jms.queue.AbstractDestination;
import com.caucho.util.Alarm;
import com.caucho.util.L10N;
import com.caucho.util.Log;
import javax.annotation.PostConstruct;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Represents a JDBC destination.
*/
abstract public class JdbcDestination extends AbstractDestination {
static final Logger log = Logger.getLogger(JdbcDestination.class.getName());
static final L10N L = new L10N(JdbcDestination.class);
protected JdbcManager _jdbcManager = new JdbcManager();
private String _name;
private long _lastPurgeTime;
public JdbcDestination()
{
}
/**
* Sets the name.
*/
public void setName(String name)
{
_name = name;
}
/**
* Gets the name.
*/
public String getName()
{
return _name;
}
/**
* Returns true for a topic.
*/
public boolean isTopic()
{
return false;
}
/**
* Sets the jdbc manager
*/
public void setJdbcManager(JdbcManager jdbcManager)
{
_jdbcManager = jdbcManager;
}
/**
* Gets the JDBC manager.
*/
public JdbcManager getJdbcManager()
{
return _jdbcManager;
}
/**
* Sets the data source.
*/
public void setDataSource(DataSource dataSource)
{
_jdbcManager.setDataSource(dataSource);
}
/**
* Sets the tablespace for Oracle.
*/
public void setTablespace(String tablespace)
{
_jdbcManager.setTablespace(tablespace);
}
/**
* Initializes the JdbcDestination
*/
@PostConstruct
public void init()
throws ConfigException, SQLException
{
_jdbcManager.init();
}
/**
* Creates a queue.
*/
protected int createDestination(String name, boolean isTopic)
throws SQLException
{
Connection conn = _jdbcManager.getDataSource().getConnection();
String destinationTable = _jdbcManager.getDestinationTable();
String destinationSequence = _jdbcManager.getDestinationSequence();
try {
String sql = ("SELECT id FROM " + destinationTable +
" WHERE name=? AND is_topic=?");
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setString(1, name);
pstmt.setInt(2, isTopic ? 1 : 0);
ResultSet rs = pstmt.executeQuery();
if (rs.next()) {
return rs.getInt(1);
}
rs.close();
if (destinationSequence != null) {
JdbcMetaData metaData = _jdbcManager.getMetaData();
sql = metaData.selectSequenceSQL(destinationSequence);
int id = 0;
pstmt = conn.prepareStatement(sql);
rs = pstmt.executeQuery();
if (rs.next())
id = rs.getInt(1);
else
throw new RuntimeException("can't create sequence");
sql = "INSERT INTO " + destinationTable + " (id,name,is_topic) VALUES(?,?,?)";
pstmt = conn.prepareStatement(sql);
pstmt.setInt(1, id);
pstmt.setString(2, name);
pstmt.setInt(3, isTopic ? 1 : 0);
pstmt.executeUpdate();
if (isTopic)
log.fine("JMSTopic[" + name + "," + id + "] created");
else
log.fine("JMSQueue[" + name + "," + id + "] created");
return id;
}
else {
sql = "INSERT INTO " + destinationTable + " (name,is_topic) VALUES(?,?)";
pstmt = conn.prepareStatement(sql,
PreparedStatement.RETURN_GENERATED_KEYS);
pstmt.setString(1, name);
pstmt.setInt(2, isTopic ? 1 : 0);
pstmt.executeUpdate();
rs = pstmt.getGeneratedKeys();
if (rs.next()) {
int id = rs.getInt(1);
if (isTopic)
log.fine("JMSTopic[" + name + "," + id + "] created");
else
log.fine("JMSQueue[" + name + "," + id + "] created");
return id;
}
else
throw new SQLException(L.l("can't generate destination for {0}",
name));
}
} finally {
conn.close();
}
}
/**
* Purges expired messages.
*/
protected void purgeExpiredMessages()
{
long purgeInterval = _jdbcManager.getPurgeInterval();
long now = Alarm.getCurrentTime();
if (now < _lastPurgeTime + purgeInterval)
return;
_lastPurgeTime = now;
try {
DataSource dataSource = _jdbcManager.getDataSource();
String messageTable = _jdbcManager.getMessageTable();
JdbcMessage jdbcMessage = _jdbcManager.getJdbcMessage();
Connection conn = dataSource.getConnection();
try {
String sql = ("DELETE FROM " + messageTable +
" WHERE expire < ? AND consumer IS NULL");
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setLong(1, Alarm.getCurrentTime());
int count = pstmt.executeUpdate();
if (count > 0)
log.fine("JMSQueue[" + getName() + "] purged " + count + " expired mesages");
pstmt.close();
} finally {
conn.close();
}
} catch (Exception e) {
log.log(Level.FINER, e.toString(), e);
}
}
}