Ah... interesting. This is a bug. The cache in iBATIS is transactional.
iBATIS also has a "feature" that only commits a transaction if a change was
detected. These two features are conflicting. Since selects don't count as
a "change", the transactional cache never flushes.
If you call session.commit(true), you'll probably see calls to putObject.
Can you please file a JIRA ticket for this?
Thanks much!
2009/9/7 Håkan Andersson <hakan.anders...@evertiq.com>
> Hi
>
> Sorry for being unclear, I will try to explain a little better what I
> have done.
>
> I have a fully working web application with the latest ibatis beta
> 3.0.0.200 and what I did was to add <cache type="db.TestCache" /> to a
> mapper, TestCache implements org.apache.ibatis.cache.Cache but at the
> moment it only have logging statements, if I'm not horribly mistaken I
> will see a "in putObject()" if hasKey() is false but I don't.
>
> My test class
> public class TestCache implements Cache {
>
> static Logger log = Logger.getLogger(TestCache.class);
>
> private String id;
> private ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
>
> /**
> * @param id
> */
> public TestCache(String id) {
> super();
> this.id = id;
> }
>
> @Override
> public void clear() {
> if (log.isDebugEnabled()) {
> log.debug("in clear()");
> }
>
> }
>
> @Override
> public String getId() {
> if (log.isDebugEnabled()) {
> log.debug("in getId()");
> }
>
> return this.id;
> }
>
> @Override
> public Object getObject(Object obj) {
> if (log.isDebugEnabled()) {
> log.debug("in getObject()");
> }
>
> return "";
> }
>
> @Override
> public ReadWriteLock getReadWriteLock() {
> if (log.isDebugEnabled()) {
> log.debug("in getReadWriteLock()");
> }
>
> return this.readWriteLock;
> }
>
> @Override
> public int getSize() {
> if (log.isDebugEnabled()) {
> log.debug("in getSize()");
> }
>
> return 0;
> }
>
> @Override
> public boolean hasKey(Object obj) {
> if (log.isDebugEnabled()) {
> log.debug("in hasKey()");
> }
> return false;
> }
>
> @Override
> public void putObject(Object arg0, Object arg1) {
> if (log.isDebugEnabled()) {
> log.debug("in putObject()");
> }
> }
>
> @Override
> public Object removeObject(Object arg0) {
> if (log.isDebugEnabled()) {
> log.debug("in removeObject()");
> }
>
> return null;
> }
> }
>
>
> The logging shows
> DEBUG java.sql.Connection - ooo Connection Opened
> DEBUG db.TestCache - in getReadWriteLock()
> DEBUG db.TestCache - in getReadWriteLock()
> DEBUG db.TestCache - in hasKey()
> DEBUG db.TestCache - in getReadWriteLock()
> DEBUG java.sql.PreparedStatement - ==> Executing: (removed)
> DEBUG java.sql.ResultSet - <== ResultSet Returned
> DEBUG java.sql.ResultSet - <== Columns: (removed)
> DEBUG java.sql.ResultSet - <== Row: (removed)
> DEBUG java.sql.ResultSet - <== Row: (removed)
> DEBUG db.TestCache - in getReadWriteLock()
> DEBUG java.sql.Connection - xxx Connection Closed
>
>
>
> Best Regards
> Håkan Andersson
>
>
> On 06/09/09 09:21, Clinton Begin wrote:
> > I'm not quite sure about your question...
> >
> > * What are you referring to when you say "the custom cache" -- I'm
> > assuming that's something you've implemented.
> >
> > * How are you hooking it into your statements?
> >
> > * Can you provide a simple unit test to demonstrate the behavior (e.g.
> > you could just use a simple hashmap implementation).
> >
> > Cheers,
> > Clinton
> >
> > 2009/9/3 Håkan Andersson <hakan.anders...@evertiq.com
> > <mailto:hakan.anders...@evertiq.com>>
> >
> > Hi
> >
> > I have been playing a little with the custom cache in ibatis 3.0 Beta
> 3,
> > but I can't see that the putObject is fired, is there any special
> > condition that needs to be fulfilled before it will happen?
> > hasKey, getObject and getReadWriteLock all get fired when it should
> but
> > not putObject.
> >
> >
> > Best Regards
> > Håkan Andersson
> >
> >
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> >
> >
>
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