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<div class="rightItemHeader">Version 0.9.0RC3</div>
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<br/><a href="http://proxool.sf.net">proxool.sf.net</a>
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<div class="changelog-release">
<div class="changelog-title">
0.9.0RC3
</div>
<div class="changelog-change">
- New naming policy for Cglib stops conflicts with other Cglib instances that are running
(even ones in different packages). Without using our own naming policy we end
up with exceptions like:
<pre>
java.lang.LinkageError: duplicate class definition:
$java/lang/Object$$FastClassByCGLIB$$3f697993
</pre>
</div>
<div class="changelog-change">
- Added ProxoolFacade.disableShutdownHook so that you can choose to explicitly shutdown
Proxool programatically. This is useful because the order that the JVM calls shutdown
hooks isn't easily controlled and you might want to shutdown Proxool *after* you've
done some cleaning up yourself. Suggested by Alex Lemaire.
</div>
<div class="changelog-change">
- Fixed bug in ProxoolDataSource to add in maximum-active-time. Credit to Paolo Di Tommaso.
</div>
<div class="changelog-change">
- Fixed bug in AdminServlet where select HTML tag was not closed properly. Credit to Paolo Di
Tommaso.
</div>
<div class="changelog-title">
0.9.0RC2
</div>
<div class="changelog-change">
- The Statement.getConnection() method now returns the wrapped connection rather than the
delegate, aloowing you to close() it safely.
</div>
<div class="changelog-change">
- Repackaged Cglib 2.1_3 (including its own repackaged version of ASM). Cglib is now repackaged
using JarJar (see the repackage-cglib Ant target in the source distribution). One of the goals
of this upgrade is to get Proxool to work with JDK 1.6 - more testing is needed before we can
know the status of that. (Note that you can't build Proxool from source with 1.6 yet because if
unimplemented methods in DataSource).
</div>
<div class="changelog-change">
- You can now configure the DataSource with delegate properties. Use the delegateProperties property.
</div>
<div class="changelog-title">
0.9.0RC1 - 2 March 2006
</div>
<div class="changelog-change">
- All connections are now wrapped in disposable wrappers. This means that once you have closed
a connection (thereby returning it to the pool) you can no longer do anything to it that
might influence its behaviour for the next client that picks it up.
</div>
<div class="changelog-change">
- Connections, Statements, PreparedStatements, and CallableStatements now implement
all the public intefaces that the delegate connection does. This means that you can,
for instance, cast a Connection directly to the driver specific one. Or more precisely,
any of the interfaces that the driver object implements. You can only cast your exception
into an interface - concrete classes aren't supported at this time.
</div>
<div class="changelog-change">
- You can now <a href="injectableInterfaces.html">inject interfaces</a> for proxied objects that expose public methods that aren't
declared in an interface. So if your vendor Connection, Statement, PreparedStatement or
CallableStatement have any public methods that aren't declared in an interface (and therefore
not exposed automatically) you can just write your own interface that declares the same
signature. Even though the vendor object doesn't implement your interface directly, the
proxied object will behave as if it does.
</div>
<div class="changelog-change">
- ProxoolFacade now has killConnection that accepts the Connection object
itself, so you don't have to know the pool alias and connection ID.
</div>
<div class="changelog-change">
- ProxoolFacade now has getId() which will give you the ID for any connection.
</div>
<div class="changelog-change">
- ProxoolFacade now has getAlias() which will give you the pool alias for any connection.
</div>
<div class="changelog-change">
- ProxoolFacade now has a no-parameter overloaded version of shutdown() for ease of integration with
the Spring Framework.
</div>
<div class="changelog-change">
- ProxoolDriver no longer logs all SQLExceptions. It's up to the client to log exceptions as it
sees fit. (With some changes to the tests, this means that we no longer get any stack traces
output during testing when we encounter *expected* errors).
</div>
<div class="changelog-change">
- Experimental DataSource implementation. Actually, we think it's ready for use but we haven't really had
time to think about documenting it. We do have <a href="datasource.html">something</a> though.
</div>
<div class="changelog-change">
- Jakarta's Commons Logging is no longer bundled with the source and is now a dependency.
We had forked this component (at their version 1.02) to make it simpler for us to deploy but
there are advantages, particular with respect to configuration, to just using
the component direct from Jakarta.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.8.3 - 14 December 2003
</div>
<div class="changelog-change">
- Switched to Cglib 2.0 and ASM 1.4. Repackaged them both to org.logicalcobwebs.clgib and
org.logicalcobwebs.asm respectively. This means that you no longer need to include
cglib in your classpath. (Note: other projects may still require it - the repackaged
version is just for use by Proxool). This removes our dependency on any version of Cglib
or ASM and avoids any potential Jar conflicts.
</div>
<div class="changelog-change">
- Made house keeper connection test more robust - credit John Hume
</div>
<div class="changelog-change">
- Removed JDK 1.4 specific code in ShutdownHook
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.8.2 - 5 November 2003
</div>
<div class="changelog-change">
- Fixed bug where delegate properties weren't being passed onto the delegate driver. If you weren't
passing any properties other than username and password to the delegate driver then this didn't
cause a problem anyway. (Note that Proxool properties were being recognised correctly.) Added a
new unit test specifically for this problem.
</div>
<div class="changelog-change">
- Throw a friendlier exception if you try and add a statistics listener to a pool with
no statistics
</div>
<div class="changelog-change">
- Statistics now creates write locks less often. This was causing a problem during heavy loads
even though the process of collecting statistics itself was very fast. If you had statistics
turned off (the default) then this wasn't a problem anyway.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.8.1 - October 27, 2003
</div>
<div class="changelog-change">
- NullPointerException that occured during SQL logging for certain methods
of excecuting statements has been fixed. Also, logging is optimised to
do less work if nothing is listening. (No ConnectionListeners registered
and log level not equal to debug or trace is off).
</div>
<div class="changelog-change">
- Fixed typos in ShutdownHook. And now silently ignore IllegalStateException
during removal of shutdownHook that occurs during JVM shut down.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.8.0 - October 26, 2003
</div>
<div class="changelog-change">
- We now use <a href="http://cglib.sourceforge.net/">Cglib's</a> proxy library.
Together with dropping the use of Timer
and only referencing ShutdownHooks at runtime we are now able to support
JDKs 1.2, 1.3 and 1.4 out of the box (Without Ant applied patches, which
were horrible).
</div>
<div class="changelog-change">
- Proxool is now available as a <a href="http://java.sun.com/products/JavaManagement/">JMX</a> component.
</div>
<div class="changelog-change">
- New getDelegateConnection() method on ProxoolFacade gives you access
to the delegate (third party) driver if you really need it. This makes
your project dependent on both Proxool (to a small extent) and your
third party driver (to a bigger extent) so should be done only if
necessary.
</div>
<div class="changelog-change">
- If ProxoolDriver gets garbage collected for any reason (outside our
control) then we no longer shutdown the pool it relates to.
</div>
<div class="changelog-change">
- AdminServlet now displays times for maximum-conneciton-lifetime,
house-keeping-sleep-time, and maximum-active-time properly
regardless of your timezone. This was a display bug only and didn't
effect the behaviour of the pool itself.
</div>
<div class="changelog-change">
- Connections that are about to be expired no longer bother to reset
themselves (because they'll never be used again anyway). This was
causing problems if the connection had connectivity problems to the
database which then caused problems during the reset.
</div>
<div class="changelog-change">
- Added <a href="properties.html#fatal-sql-exception-wrapper-class">fatal-sql-exception-wrapper-class</a> property.
If a fatal exception is
detected then it is wrapped up inside the exception defined by this
property. This can make exception handling easier in frameworks like
Struts. Two wrappers are provided (FataSQLException and FatalRuntimeException)
but you can also define your own.
</div>
<div class="changelog-change">
- Added <a href="properties.html#test-before-use">test-before-use</a>
and <a href="properties.html#test-after-use">test-after-use</a> properties. They will trigger a test of
the connection (as defined by <a href="properties.html#house-keeper-test-sql">house-keeper-test-sql</a>)
just before a connection
is handed out and just after it is closed (put back in the pool) respectively.
These are both off by default.
</div>
<div class="changelog-change">
- Fixed ConcurrentModificationException that happened in some
environments during automatic statement closure.
</div>
<div class="changelog-change">
- Fixed bug where if there was an Error during prototyping (not an SQLException,
not a RuntimeException but something serious like NoClassDefFoundError) then
the prototyper would keep attempting to make connections as fast as it could
(and never succeed in making any). Much better for the prototyper to give
up in that situation and try again when it is next asked (which, by default,
would be 30 seconds later).
</div>
<div class="changelog-change">
- Fix to documentation. Defining more than one type of fatal SQL exception
is done with a comma delimited list.
</div>
<div class="changelog-change">
- Fix to ProxoolFacade.redefine() which was in fact doing an update instead of a
redefine. This didn't have any consequences unless you were calling this method
explicitly in your code.
</div>
<div class="changelog-change">
- Made the 'Attempt to use a pool with incomplete definition' exception a bit more
informative. It is often because you are refering to an unregistered pool by its
alias.
</div>
<div class="changelog-change">
- SQL command logging (using the 'trace' property) now embeds the parameters into
the SQL (if the SQL is parametised). This means that the log is almost like a
journal - with the exception that any callable statements that return data retain
the ? (question marks) that contain the output parameters.
</div>
<div class="changelog-change">
- Batched statements are now correctly reported with the <a href="properties.html#trace">trace</a> feature.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.7.2 - April 28, 2003
</div>
<div class="changelog-change">
- Moved DataSourceTest into Sandbox so that the Ant test target
runs correctly.
</div>
<div class="changelog-change">
- Fixed a bug in ConfigurationListener that meant that if you passed
a Properties object to the Driver when asking for a connection to an
existing pool it incorrectly called ConfigurationListenerIF.<a href="api/org/logicalcobwebs/proxool/ConfigurationListenerIF.html#definitionUpdated(org.logicalcobwebs.proxool.ConnectionPoolDefinitionIF, java.util.Properties, java.util.Properties)">definitionUpdated</a>
when there was no change, and didn't call it when there was.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.7.1 - April 19, 2003
</div>
<div class="changelog-change">
- Added a lot of concurrency code - mainly using concurrent package
written by Doug Lea.
</div>
<div class="changelog-change">
- Fixed display bug in AdminServlet - average active time was being
displayed in milliseconds instead of seconds.
</div>
<div class="changelog-change">
- Refactoring of how definitions are updated and redefined. Use
ProxoolFacade.updateConnectionPool to make incremental changes
and ProxoolFacade.redefineConnectionPool to reset the definition
and start again. (If you pass a Properties object to the DriverManager
when asking for a connection this will call redefineConnectionPool.)
</div>
<div class="changelog-change">
- if you change the url or any of the delegate properties for a pool's
definition then all existing connections are automatically killed so that
new ones are created that conform to the new definition.
</div>
<div class="changelog-change">
- Change to ConfigurationListenerIF API. defintionChanged is now
called definitionChanged (stupid spelling error).
</div>
<div class="changelog-change">
- ConnectionListenerIF.onDeath now gets called for all connections
closed during shutdown.
</div>
<div class="changelog-change">
- Pools manually removed (using ProxoolFacade.removeConnectionPool)
are no longer attempted to be removed during shutdown.
</div>
<div class="changelog-change">
- Maximum-new-connections property has been deprecated in favour of
the more descriptive simultaneous-build-throttle property.
</div>
<div class="changelog-change">
- Refactoring of house keeper and prototyper so that the number of threads
used by Proxool is more scalable. (Proxool used to create two threads
per pool).
</div>
<div class="changelog-change">
- Moved AdminServlet to servlet sub-package to make way for upcoming
JMX admin implementation.
</div>
<div class="changelog-change">
- Fixed bug where ConfigurationListenerIF.definitionUpdated was getting called
when you passed a Properties object to the Driver regardless if whether the
definition had changed.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.7 - February 21, 2003
</div>
<div class="changelog-change">
- We have dropped the dependency on commons-logging.jar
by copying the code into our own project (retaining credit to
the Jakarta team, naturally).
</div>
<div class="changelog-change">
- New <a href="admin.html">Admin</a> package provides statistical
and snapshot information so you can measure how well Proxool, and
your database, is doing.
</div>
<div class="changelog-change">
- New <a href="adminServlet.html">AdminServlet</a> provides statistical
information for your web application.
</div>
<div class="changelog-change">
- The JDK 1.2 patch code has been brought up to date and now
passes all the unit tests.
</div>
<div class="changelog-change">
- The <a href="listen.html">listener</a> code has been redone. Proxool now allows multiple
listeners per pool. setFooListener has now been deprecated in
favour of addFooListener. And it's now thread safe (just in case you
add or remove a listener while the pool is running).
</div>
<div class="changelog-change">
- The new <a href="servlets.html">ServletConfigurator</a> will help you
to configure and shutdown your pools simply by adding a few lines to
your servlet configuration (web.xml) file and perhaps writing an XML file.
No changes to your Java code.
</div>
<div class="changelog-change">
- By using ShutdownHooks (with JDK1.3 or later) we get a cleaner, more
reliable shutdown of the pools when the JVM stops.
</div>
<div class="changelog-change">
- Removed ReloadMonitor (added in 0.5) because it made use of
SystemProperties and this is prohbited by J2SE. You are now responsible
for ensuring Proxool is shutdown if your application is reloaded within
the same environment (as can sometimes happen in a web application).
See ProxoolFacade.<a href="api/org/logicalcobwebs/proxool/ProxoolFacade.html#shutdown(int)">shutdown()</a>.
</div>
<div class="changelog-change">
- Fixed bug when you asked DatabaseMetaData for the connection. It
now gives you back the Proxool connection, not the underlying delegate
connection.
</div>
<div class="changelog-change">
- Fixed bug where if you registered, removed and then re-registered a pool
then the new pool would not notice the Properties passed to it.
</div>
<div class="changelog-change">
- If a connection encounters a fatal SQLException (as defined by the
fatal-sql-exception property) it now wakes up the house keeper thread
so other connections are tested as soon as possible (with the
house-keeper-test-sql) rather than waiting for the next scheduled sweep.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.6 - January 23, 2003
</div>
<div class="changelog-change">
- ProxoolFacade API has changed slightly. Some of the methods no
longer throw an SQLException but a ProxoolException instead.
This might lead to some small changes in your code.
</div>
<div class="changelog-change">
- There used to be some ambiguity about whether you referred to a
pool by its alias or its full url (when using ProxoolFacade). This has
now been fixed. This means you can now change the url (to use a
different database for instance) without creating a new pool.
</div>
<div class="changelog-change">
- Version information is now logged so you can tell what version of
Proxool you are using.
</div>
<div class="changelog-change">
- ConnectionPoolStatisticsIF now reports the time the pool was started.
</div>
<div class="changelog-change">
- We now use FastArrayList (from Jakarta Commons) instead of the
JDK's Vector for improved collection support.
</div>
<div class="changelog-change">
- New <a href="api/org/logicalcobwebs/proxool/configuration/JAXPConfigurator.html">JAXPConfigurator</a>
and <a href="api/org/logicalcobwebs/proxool/configuration/PropertyConfigurator.html">PropertyConfigurator</a>
to make it easy to configure proxool from a file.
</div>
<div class="changelog-change">
- New
<a href="api/org/logicalcobwebs/proxool/ConfigurationListenerIF.html">ConfigurationListenerIF</a>
interface allows you to implement a persistent configuration.
</div>
<div class="changelog-change">
- Bug fix for JDBC drivers that implement the Statement interface
indirectly (that is, extend a class that implements it rather than
implementing it directly). (Credit to Martin Crawford).
</div>
<div class="changelog-change">
- Unclosed Statements are now automatically closed when the
Connection is closed, in accordance with the JDBC spec.
</div>
<div class="changelog-change">
- Rollback is called on all connections when they are closed (that is,
returned to the pool). This has no effect if autoCommit it true (default)
or any pending transactions have been committed or already rolled back.
This will only have an effect if you currently close connections with
pending transactions.
</div>
<div class="changelog-change">
- ProxoolFacade's new <a href="api/org/logicalcobwebs/proxool/ProxoolFacade.html#getDelegateStatement(java.sql.Statement)">getDelegateStatement</a>
allows you to get to
the underlying JDBC Driver's original Statement if you really need
to. (This isn't recommended unless you have no other choice).
</div>
<div class="changelog-change">
- You can now update the URL for a pool, not just the properties.
See ProxoolFacade's
<a href="api/org/logicalcobwebs/proxool/ProxoolFacade.html#updateConnectionPool(java.lang.String, java.util.Properties)">updateConnectionPool.</a>
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.5 - 3 December 2002
</div>
<div class="changelog-change">
- Fix finalisation of old instances. If you deploy to some environments in
a certain way then it is possible for the class to be reloaded without the
finalize() method being called. This will result in spurious house keeping
threads remaining. The new ReloadMonitor avoids this.
</div>
<div class="changelog-change">
- Various improvements to the logging to make it more informative and
cleaner.
</div>
<div class="changelog-change">
- Checkstyle improvements. We now enforce variable names and line length.
Javadoc enforcement to come soon.
</div>
<div class="changelog-change">
- Made the onBirth() method of ConnectionListenerIF interface failsafe. And
removed obsolete cleanupClob() method (which was never called anyway)..
</div>
<div class="changelog-change">
- Removed redundant logFilename stuff from ConnectionPoolDefinition. All
logging is handled by Jakarta Commons's Logging anyway.
</div>
<div class="changelog-change">
- Fix when removing pools that meant that when you tried to add them again
Proxool thought it was a duplicate (credit to Dan Milstein).
</div>
<div class="changelog-change">
- Improvements to the way Proxool detects changes to the pool definition
when resending the Properties object when you get a connection. Now
detects when it has changed which means that we don't do
unnecessary configuration and log is improved (we now log properties
as they are set or updated).
</div>
<div class="changelog-change">
- Fix to the ProxyConnection within the equals() method that was causing
identical conections to be incorrectly reported as unequal (which leads to
problems when adding them to some collections).
</div>
<div class="changelog-change">
- Improvements to test classes. Lots more tests.
</div>
<div class="changelog-change">
- Added support for resetting connection properties when it is returned to
the pool (autoCommit, catalog, readOnly, transactionIsolation, typeMap
and holdability). These properties are reset to the values when the connection
was made everytime it is returned. (credit to Tim Morley)
</div>
<div class="changelog-change">
- Connection.isClosed() now returns true when it is back in the pool.
</div>
<div class="changelog-change">
- New trace property allows you to log each execution, the SQL, the parameters
used, and the execution time (DEBUG level). Use proxool.trace=true property.
You can also get this information if you register a ConnectionListenerIF (use
ProxoolFacade's setConnectionListener() method). This won't effect performance
if you're not listening or have trace off.
</div>
<div class="changelog-change">
- Prototyping is now off by default. To enable prototyping you need to set the
proxool.prototype-count property to something sensible (like 5, for instance).
[Prototyping is where spare connections are when the number of available
connections approaches zero.]
</div>
<div class="changelog-change">
- Fix for catching fatal SQL exceptions. This is a feature that throws away connections
that encounter certain types of exception.
</div>
</div>
<div class="changelog-release">
<div class="changelog-title">
0.4 - 19 September 2002
</div>
<div class="changelog-change">
- Rethink of how we organise our source code so that we can easily build to
include different optional components.
</div>
<div class="changelog-change">
- Use the Jakarta Commons' ultra-thin log wrapper. This allows you to plugin
whatever logging component you like.
</div>
<div class="changelog-change">
- Switched to use of the Proxy class so that we are not tied to a particular
version of the JDK. However, this does mean a bit of patching to work with
JDK 1.2 (Proxy was introduced in 1.3). Fortunately, this patch is handled
easily using Ant.
</div>
<div class="changelog-change">
- Test classes now make use of Hypersonic. A pure Java database with a very small
footprint. This means we can run the tests without having to rely on the existence
of a separate database.
</div>
<div class="changelog-change">
- Layout and code style changes in accordance with
<a class="resource-link" href="http://checkstyle.sourceforge.net/">CheckStyle</a>
</div>
<div class="changelog-change">
- New XMLConfigurator using JAXP to configure your connection pools.
</div>
<div class="changelog-change">
- Improvments in
<a href="http://www.junit.org">Junit</a> testing.
</div>
</div>
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