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Checked into trunk Patch that fixes
java.util.ConcurrentModificationException on flush
Apparently that was
caused by triggering a fetch group,
and that in turn happened because of
mapping.compareForChange was called by
DeferredChangeDetectionPolicy for a
mapping outside the fetch group.
Hunted all usages of this method and changed
them all to NOT be called outside
the fetch group.
----- Original Message -----
Sent: Sunday, June 06, 2010 11:29
PM
Subject: Re: [eclipselink-dev] Re: Bug
244124 - Add Nested FetchGroup
Checked into trunk Patch that fixes NPE in
ObjectBuilder.copyObject
----- Original Message -----
Sent: Sunday, June 06, 2010 7:51
PM
Subject: Re: [eclipselink-dev] Re: Bug
244124 - Add Nested FetchGroup
Checked into trunk small corrections to the last
patch
----- Original Message -----
Sent: Sunday, June 06, 2010 1:33
AM
Subject: Re: [eclipselink-dev] Re:
Bug 244124 - Add Nested FetchGroup
Checked into trunk assorted last minute fixes patch.
Fixed
exceptions' messages;
CopyGroup now adds primary keys and version (just
as fetch group) unless
explicitly told not to do so (only applies to
CASCADE_TREE mode);
Also fixed CopyGroup so that it always switches to
CASCADE_TREE mode as soon as
(at least one) attribute is
added.
Added fieldaccess.FetchGroups test suite - copy of FetchGroups
test suite, but
uses field access.
----- Original Message -----
Sent: Friday, June 04, 2010 3:57
PM
Subject: Re: [eclipselink-dev] Re:
Bug 244124 - Add Nested FetchGroup
Checked into trunk FetchGroup validation patch -
extended.
Default and named FetchGroups validated during
FetchGroupManager post
initialization;
FetchGroup validated with
all nested FetchGroups in
ObjectLevelReadQuery.prePrepare
method;
Defined exceptions for invalid attributes (no mapping, no
reference mapping on
reference attribute, no reference descriptor, no
reference FetchGroupManager);
Updated serialization
test.
Additions made to the original FetchGroup validation
patch:
added explicit triggering of target fetch group in
mergeInObject if it's not a superset of the source fetch
group;
addAttribute method no longer returns AttributeItem;
moved
load method from LoadGroup to AbstractSession (leaving LoagGroup empty
for now);
allowed QueryHints.FETCH_GROUP and LOAD_GROUP to accept
AttributeGroup.
----- Original Message -----
Sent: Wednesday, June 02, 2010
8:16 PM
Subject: Re: [eclipselink-dev]
Re: Bug 244124 - Add Nested FetchGroup
Checked into trunk CopyGroup patch
Commented out the
failing tests - problems in read merge;
Defined a new class
CopyGroup derived from AggregateGroup;
deprecated
ObjectCopyingPolicy, which is now derived fron
CopyGroup;
deprecated the old copyObject method - both versions of
it;
defined a new copy method to AbstractSession and
EntityManagerImpl that takes
CopyPolicy;
copy method accepts
both objects and collections;
copy method makes a copy according to
CopyPolicy -
all attributes in the CopyPolicy are
copied;
none attributes outside the CopyPolicy are
copied;
the copied object assigned the corresponding
EntityFetchGroup and detached
(session == null);
In case of
relational leaf attribute ("address" or "manager.phoneNumbers")
all non-reference attributes that are included in default
fetch group + pk
are copied;
copy method still not implemented
in case for entities without fetch groups (no
fetch group
manager);
By default CopyGroup
like the old
ObjectCopyingPolicy uses CASCADE_PRIVATE_PARTS cascading;
unlike it doesn't nullify copy's pk;
As soon as an attribute is
added to CopyPolicy its cascading is changed to the
new
CASCADE_TREE option that is a new functionality.
----- Original Message -----
Sent: Tuesday, June 01, 2010
2:03 PM
Subject: Re: [eclipselink-dev]
Re: Bug 244124 - Add Nested FetchGroup
Checked into trunk:
Correction patch after James' review.
James'
comments:
- addPartialAttribute, did you also deprecate the
one that takes an _expression_?
- ObjectLevelReadQuery,
addSelectionFieldsForJoinedExpression, code is odd,
cast to
Vector<DatabaseField> but then casts to Object and allows
_expression_?
- getFetchGroupSelectionFields, in general try to
avoid using Vector (List).
- shouldReadMapping, short circuit
was removed?
Some more comments from refreshing my
view.
- FetchGroupManager, has a bunch of public methods that
should be marked
internal
- Should have a test for
embeddable attributes, we should probably throw some
kind of
error if we don't support this, also aggregate collections.
-
ForeignReferenceMapping, batchValueFromRow, the setting of the fetch
group
should be in the prepare of the nested batch query, not
cloning it and
repreparing it.
- FetchGroup,
set/shouldLoad should have a user comment explaining what is
does
- LoadGroup, should avoid using DescriptorIterator as
performance issue and not
polymorphic, should dispatch to
ObjectBuilder/mappings
- ObjectLevelReadQuery, setting of
fetch group should be in mapping, not
cloning and repreparing
query in query
- ClassWeaver, does not look like fetch groups
are weaved if change tracking is
not weaved?
-
MethodWeaver, same thing
- QuerySQLTracker uses tabs, also
the class already exists in the testing
framework package, so no
need to define another
The patch corrects most of the
problems mentioned in these comments.
----- Original Message -----
Sent: Tuesday, May 25, 2010
5:24 PM
Subject: Re:
[eclipselink-dev] Re: Bug 244124 - Add Nested FetchGroup
Bug 244124 - Add Nested FetchGroup
Checked into trunk two independent patches
for fetch groups: fetch joins and weaving.
Fetch join patch - take 2.
A new version of patch that adds support for fetch
joins used together with
nested fetch groups.
In case joined attribute is outside of the fetch
group a WARNING is logged.
The query still works but very inefficiently: the
fetch group is triggered and
the whole object is read in.
The only possibility here would be to throw an
exception instead - throwing
away joined attribute (don't know how hard that
would be to do) doesn't seem
right - both fetch group and fetch joins specified
directly on the query.
Weaving patch
Fixes some weaving problems introduced in Main
patch (see bug 314340).
This patch fixes only part of that bug: static
weaving tests pass, but
beanvalidation tests still
fail.
----- Original Message -----
Sent: Tuesday, May 25, 2010
3:06 PM
Subject: Re:
[eclipselink-dev] Re: Bug 244124 - Add Nested FetchGroup
Fetch join patch - take 2.
A new version of patch
that adds support for fetch joins used together with
nested
fetch groups.
In case joined attribute is outside of the
fetch group a WARNING is logged.
The query still works but
very inefficiently: the fetch group is triggered and
the
whole object is read in.
The only possibility here would
be to throw an exception instead - throwing
away joined
attribute (don't know how hard that would be to do) doesn't
seem
right - both fetch group and fetch joins specified
directly on the query.
----- Original Message -----
Sent: Wednesday, May 19,
2010 4:33 PM
Subject: Re:
[eclipselink-dev] Re: Bug 244124 - Add Nested FetchGroup
Addition to prev. patch
Added load method to
AbstractSession, too.
Checked into trunk.
----- Original Message -----
Sent: Wednesday, May
19, 2010 3:35 PM
Subject:
[eclipselink-dev] Re: Bug 244124 - Add Nested FetchGroup
Checked into trunk Main patch - take
3.
There are some things not done yet:
1) merging in
cache still uses "one-storey" union;
2) fetch
joins
All the fetch groups assigned to objects
now are of type EntityFetchGroup.
It's a flat (not
nested) fetch group that only reflects the state of its
owner
object.
A single EntityFetchGroup may be shared
by many objects, and it is immutable.
An EntityFetchGroup
usually not created directly but rather looked up on
the
FetchGroupmanager (keyed by set of its
attributes).
When a value is set into not fetched
attribute in serialized object (the one
that doesn't have
a session) then a new EntityFetchGroup created to reflect
the
new object's fetch state.
Deprecated partial attributes
Added
LOAD_GROUP_ATTRIBUTE QueryHint.
Added "load" method to
JpaEntityManager.
----- Original Message -----
Sent: Friday, May 14,
2010 8:51 PM
Subject: Re: Bug
244124 - Add Nested FetchGroup
Rolledback my last fix for Bug 244124 - Add Nested
FetchGroup.
It caused cb test failures in moxy and dbws.
Back to the prev. rev.7240
Will investigate on Monday.
----- Original Message
-----
Sent: Friday, May
14, 2010 5:58 PM
Subject: Bug 244124
- Add Nested FetchGroup
Checked into trunk.
Main patch.
The patch provides basic nested
fetch group functionality.
FetchGroup got a new
shouldLoad flag - it indicates whether its
attributes
should be loaded.
Also there is a new
class LoadGroup, which allows to manage loading
of
individual relational attributes.
There is
still work to be done in the area of merging with cache
and fetch
joins.
A new test package
org.eclipse.persistence.testing.tests.jpa.fetchgroups
was
added.
See simple examples of different
loading arrangements in findMinEmployee tests
in
NestedDefaultFetchGroupTests.
A simple merge was
tested and works:
serialize object with a fetch
group applied to it;
update serialized object (even
attribute outside the fetch group);
serialize it back
to the server;
merge.
See a simple example in
SimpleSerializeFetchGroupTests.simpleSerializeAndMerge.
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