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eFaps is a framework used to map objects with or without attached files to
a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface.
The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.
/*
* Copyright 2003 - 2012 The eFaps Team
*
* 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.
*
* Revision: $Rev: 7483 $
* Last Changed: $Date: 2012-05-11 11:57:38 -0500 (Fri, 11 May 2012) $
* Last Changed By: $Author: [email protected] $
*/
package org.efaps.message;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.efaps.admin.datamodel.Status;
import org.efaps.db.Context;
import org.efaps.db.transaction.ConnectionResource;
import org.efaps.util.EFapsException;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Holds the status of the messages including their count.
*
* @author The eFaps Team
* @version $Id: MessageStatusHolder.java 7483 2012-05-11 16:57:38Z [email protected] $
*/
public class MessageStatusHolder
implements Job
{
/**
* Logging instance used in this class.
*/
private static final Logger LOG = LoggerFactory.getLogger(MessageStatusHolder.class);
/**
* basis select.
*/
private static final String SELECT = "SELECT DISTINCT userid, count(*) "
+ "FROM t_msg2user WHERE status = ? GROUP BY userid";
/**
* Cache used for the MessageStatus.
*/
private static final MsgCache CACHE = new MsgCache();
/**
* Execute the job.
* @param _context JobExecutionContext
* @throws JobExecutionException on error
*/
@Override
public void execute(final JobExecutionContext _context)
throws JobExecutionException
{
MessageStatusHolder.CACHE.update();
}
/**
* has the given user read messages.
* @param _userId user id the status is wanted for
* @return true if unread exist
*/
public static boolean hasReadMsg(final Long _userId)
{
return MessageStatusHolder.CACHE.userID2Read.containsKey(_userId);
}
/**
* Count of read messages.
* @param _userId user id the count is wanted for
* @return count of read messages
*/
public static int getReadCount(final Long _userId)
{
int ret = 0;
if (MessageStatusHolder.CACHE.userID2Read.containsKey(_userId)) {
ret = MessageStatusHolder.CACHE.userID2Read.get(_userId);
}
return ret;
}
/**
* has the given user unread messages.
* @param _userId user id the status is wanted for
* @return true if unread exist
*/
public static boolean hasUnreadMsg(final Long _userId)
{
return MessageStatusHolder.CACHE.userID2UnRead.containsKey(_userId);
}
/**
* Count of unread messages.
* @param _userId user id the count is wanted for
* @return count of unread messages
*/
public static int getUnReadCount(final Long _userId)
{
int ret = 0;
if (MessageStatusHolder.CACHE.userID2UnRead.containsKey(_userId)) {
ret = MessageStatusHolder.CACHE.userID2UnRead.get(_userId);
}
return ret;
}
/**
* Thread save cache.
*/
private static final class MsgCache
{
/**
* The map holds all cached data instances by Id. Because of the
* double-checked locking idiom, the instance variable is defined
* volatile.
*/
private volatile Map userID2UnRead = null;
/**
* The map holds all cached data instances by Id. Because of the
* double-checked locking idiom, the instance variable is defined
* volatile.
*/
private volatile Map userID2Read = null;
/**
* Constructor setting empty map.
*/
private MsgCache()
{
this.userID2UnRead = new HashMap();
this.userID2Read = new HashMap();
}
/**
* Update the MessageStatus.
*/
public void update()
{
ConnectionResource con = null;
boolean abort = true;
try {
con = Context.getThreadContext().getConnectionResource();
final Map unread = new HashMap();
final Map read = new HashMap();
final PreparedStatement stmt = con.getConnection().prepareStatement(MessageStatusHolder.SELECT);
stmt.setLong(1, Status.find(UUID.fromString("87b82fee-69d3-4e45-aced-0d57c6a0cd1d"), "Unread").getId());
final ResultSet rs = stmt.executeQuery();
while (rs.next()) {
final long id = rs.getLong(1);
final Integer count = rs.getInt(2);
unread.put(id, count);
}
rs.close();
stmt.setLong(1, Status.find(UUID.fromString("87b82fee-69d3-4e45-aced-0d57c6a0cd1d"), "Read").getId());
final ResultSet rs2 = stmt.executeQuery();
while (rs2.next()) {
final long id = rs2.getLong(1);
final Integer count = rs2.getInt(2);
read.put(id, count);
}
rs2.close();
stmt.close();
con.commit();
this.userID2UnRead = unread;
this.userID2Read = read;
abort = false;
} catch (final EFapsException e) {
MessageStatusHolder.LOG.error("EFapsException");
} catch (final IllegalStateException e) {
MessageStatusHolder.LOG.error("IllegalStateException");
} catch (final SQLException e) {
MessageStatusHolder.LOG.error("SQLException");
} finally {
if (abort && con != null) {
try {
con.abort();
} catch (final EFapsException e) {
MessageStatusHolder.LOG.error("EFapsException");
}
}
}
}
}
}