Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F78464150
MysqlPooledConnection.java
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Wed, Aug 21, 01:20
Size
8 KB
Mime Type
text/x-java
Expires
Fri, Aug 23, 01:20 (2 d)
Engine
blob
Format
Raw Data
Handle
20044852
Attached To
R8218 ShoulderDB_ImportSegmentMeasureAnalyze
MysqlPooledConnection.java
View Options
/*
Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program 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; version 2
of the License.
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 General Public License for more details.
You should have received a copy of the GNU General Public License along with this
program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package
com.mysql.jdbc.jdbc2.optional
;
import
java.lang.reflect.Constructor
;
import
java.sql.Connection
;
import
java.sql.SQLException
;
import
java.util.HashMap
;
import
java.util.Iterator
;
import
java.util.Map
;
import
javax.sql.ConnectionEvent
;
import
javax.sql.ConnectionEventListener
;
import
javax.sql.PooledConnection
;
import
com.mysql.jdbc.ExceptionInterceptor
;
import
com.mysql.jdbc.SQLError
;
import
com.mysql.jdbc.Util
;
/**
* This class is used to wrap and return a physical connection within a logical handle. It also registers and notifies ConnectionEventListeners of any
* ConnectionEvents
*/
public
class
MysqlPooledConnection
implements
PooledConnection
{
private
static
final
Constructor
<?>
JDBC_4_POOLED_CONNECTION_WRAPPER_CTOR
;
static
{
if
(
Util
.
isJdbc4
())
{
try
{
JDBC_4_POOLED_CONNECTION_WRAPPER_CTOR
=
Class
.
forName
(
"com.mysql.jdbc.jdbc2.optional.JDBC4MysqlPooledConnection"
)
.
getConstructor
(
new
Class
[]
{
com
.
mysql
.
jdbc
.
Connection
.
class
});
}
catch
(
SecurityException
e
)
{
throw
new
RuntimeException
(
e
);
}
catch
(
NoSuchMethodException
e
)
{
throw
new
RuntimeException
(
e
);
}
catch
(
ClassNotFoundException
e
)
{
throw
new
RuntimeException
(
e
);
}
}
else
{
JDBC_4_POOLED_CONNECTION_WRAPPER_CTOR
=
null
;
}
}
protected
static
MysqlPooledConnection
getInstance
(
com
.
mysql
.
jdbc
.
Connection
connection
)
throws
SQLException
{
if
(!
Util
.
isJdbc4
())
{
return
new
MysqlPooledConnection
(
connection
);
}
return
(
MysqlPooledConnection
)
Util
.
handleNewInstance
(
JDBC_4_POOLED_CONNECTION_WRAPPER_CTOR
,
new
Object
[]
{
connection
},
connection
.
getExceptionInterceptor
());
}
/**
* The flag for an exception being thrown.
*/
public
static
final
int
CONNECTION_ERROR_EVENT
=
1
;
/**
* The flag for a connection being closed.
*/
public
static
final
int
CONNECTION_CLOSED_EVENT
=
2
;
private
Map
<
ConnectionEventListener
,
ConnectionEventListener
>
connectionEventListeners
;
private
Connection
logicalHandle
;
private
com
.
mysql
.
jdbc
.
Connection
physicalConn
;
private
ExceptionInterceptor
exceptionInterceptor
;
/**
* Construct a new MysqlPooledConnection and set instance variables
*
* @param connection
* physical connection to db
*/
public
MysqlPooledConnection
(
com
.
mysql
.
jdbc
.
Connection
connection
)
{
this
.
logicalHandle
=
null
;
this
.
physicalConn
=
connection
;
this
.
connectionEventListeners
=
new
HashMap
<
ConnectionEventListener
,
ConnectionEventListener
>();
this
.
exceptionInterceptor
=
this
.
physicalConn
.
getExceptionInterceptor
();
}
/**
* Adds ConnectionEventListeners to a hash table to be used for notification
* of ConnectionEvents
*
* @param connectioneventlistener
* listener to be notified with ConnectionEvents
*/
public
synchronized
void
addConnectionEventListener
(
ConnectionEventListener
connectioneventlistener
)
{
if
(
this
.
connectionEventListeners
!=
null
)
{
this
.
connectionEventListeners
.
put
(
connectioneventlistener
,
connectioneventlistener
);
}
}
/**
* Removes ConnectionEventListeners from hash table used for notification of
* ConnectionEvents
*
* @param connectioneventlistener
* listener to be removed
*/
public
synchronized
void
removeConnectionEventListener
(
ConnectionEventListener
connectioneventlistener
)
{
if
(
this
.
connectionEventListeners
!=
null
)
{
this
.
connectionEventListeners
.
remove
(
connectioneventlistener
);
}
}
/**
* Invoked by the container. Return a logicalHandle object that wraps a
* physical connection.
*
* @see java.sql.DataSource#getConnection()
*/
public
synchronized
Connection
getConnection
()
throws
SQLException
{
return
getConnection
(
true
,
false
);
}
protected
synchronized
Connection
getConnection
(
boolean
resetServerState
,
boolean
forXa
)
throws
SQLException
{
if
(
this
.
physicalConn
==
null
)
{
SQLException
sqlException
=
SQLError
.
createSQLException
(
"Physical Connection doesn't exist"
,
this
.
exceptionInterceptor
);
callConnectionEventListeners
(
CONNECTION_ERROR_EVENT
,
sqlException
);
throw
sqlException
;
}
try
{
if
(
this
.
logicalHandle
!=
null
)
{
((
ConnectionWrapper
)
this
.
logicalHandle
).
close
(
false
);
}
if
(
resetServerState
)
{
this
.
physicalConn
.
resetServerState
();
}
this
.
logicalHandle
=
ConnectionWrapper
.
getInstance
(
this
,
this
.
physicalConn
,
forXa
);
}
catch
(
SQLException
sqlException
)
{
callConnectionEventListeners
(
CONNECTION_ERROR_EVENT
,
sqlException
);
throw
sqlException
;
}
return
this
.
logicalHandle
;
}
/**
* Invoked by the container (not the client), and should close the physical
* connection. This will be called if the pool is destroyed or the
* connectionEventListener receives a connectionErrorOccurred event.
*
* @see java.sql.DataSource#close()
*/
public
synchronized
void
close
()
throws
SQLException
{
if
(
this
.
physicalConn
!=
null
)
{
this
.
physicalConn
.
close
();
this
.
physicalConn
=
null
;
}
if
(
this
.
connectionEventListeners
!=
null
)
{
this
.
connectionEventListeners
.
clear
();
this
.
connectionEventListeners
=
null
;
}
}
/**
* Notifies all registered ConnectionEventListeners of ConnectionEvents.
* Instantiates a new ConnectionEvent which wraps sqlException and invokes
* either connectionClose or connectionErrorOccurred on listener as
* appropriate.
*
* @param eventType
* value indicating whether connectionClosed or
* connectionErrorOccurred called
* @param sqlException
* the exception being thrown
*/
protected
synchronized
void
callConnectionEventListeners
(
int
eventType
,
SQLException
sqlException
)
{
if
(
this
.
connectionEventListeners
==
null
)
{
return
;
}
Iterator
<
Map
.
Entry
<
ConnectionEventListener
,
ConnectionEventListener
>>
iterator
=
this
.
connectionEventListeners
.
entrySet
().
iterator
();
ConnectionEvent
connectionevent
=
new
ConnectionEvent
(
this
,
sqlException
);
while
(
iterator
.
hasNext
())
{
ConnectionEventListener
connectioneventlistener
=
iterator
.
next
().
getValue
();
if
(
eventType
==
CONNECTION_CLOSED_EVENT
)
{
connectioneventlistener
.
connectionClosed
(
connectionevent
);
}
else
if
(
eventType
==
CONNECTION_ERROR_EVENT
)
{
connectioneventlistener
.
connectionErrorOccurred
(
connectionevent
);
}
}
}
protected
ExceptionInterceptor
getExceptionInterceptor
()
{
return
this
.
exceptionInterceptor
;
}
}
Event Timeline
Log In to Comment