[#CAY-709] Leak-free ObjectContext

Cayenne

Leak-free ObjectContext

Created: 20/Nov/06 07:27 PM Updated: 22/Nov/06 03:45 AM

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Component/s:

Cayenne Core Library

Affects Version/s:

3.0

Fix Version/s:

3.0

Time Tracking:

Not Specified

Resolution Date:

22/Nov/06 03:45 AM

Description

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http://objectstyle.org/cayenne/lists/cayenne-devel/current/0036.html

Per discussion thread above we need to implement a self-cleaning DataContext/CayenneContext with weakly referenced objects.

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Repository	Revision	Date	User	Message
ASF	#478018	Wed Nov 22 03:22:16 UTC 2006	aadamchik	~~CAY-709~~: Leak-free ObjectContext (first cut - ObjectStore uses weak references to hollow and committed objects)
				Files Changed
				MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/main/java/org/apache/cayenne/access/ObjectDiff.java ADD /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/test/java/org/apache/cayenne/access/ObjectStoreGCTst.java MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/main/java/org/apache/cayenne/access/ObjectStore.java

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Andrus Adamchik added a comment - 22/Nov/06 03:26 AM

This feature allows to deprecate ObjectStore.startTrackingNewObjects() and ObjectStore.unregisterNewObjects() and also optimize some ObjectDiff operations, resulting in fewer map lookups.

Repository	Revision	Date	User	Message
ASF	#478020	Wed Nov 22 03:27:15 UTC 2006	aadamchik	~~CAY-709~~: Leak-free ObjectContext (deprecating manual refrence counter)
				Files Changed
				MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/main/java/org/apache/cayenne/access/ObjectStore.java

Repository	Revision	Date	User	Message
ASF	#478021	Wed Nov 22 03:32:11 UTC 2006	aadamchik	~~CAY-709~~: Leak-free ObjectContext (redefining ObjectDiff, removing dependency on ObjectStore and eliminating object lookups)
				Files Changed
				MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/main/java/org/apache/cayenne/access/ObjectDiff.java MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/main/java/org/apache/cayenne/access/ObjectStore.java

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Andrus Adamchik added a comment - 22/Nov/06 03:44 AM

not sure if this would be a smart default strategy for the client in an ROP situation, as there is no underlying snapshot cache and swapping out previously resolved objects will result in extra db trips

Andrus Adamchik made changes - 22/Nov/06 03:45 AM

Field	Original Value	New Value
Status	Open [ 1 ]	Closed [ 6 ]
Resolution		Fixed [ 1 ]

Repository	Revision	Date	User	Message
ASF	#478423	Thu Nov 23 01:29:15 UTC 2006	aadamchik	~~CAY-709~~: Leak-free ObjectContext (fixing logic for nested DataContexts - Cayenne must be able to refetch objects that were deallocated from the parent context)
				Files Changed
				MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/main/java/org/apache/cayenne/access/ChildDiffLoader.java MODIFY /incubator/cayenne/main/trunk/core/cayenne-jdk1.4/src/test/java/org/apache/cayenne/access/NestedDataContextWriteTst.java

Henri Yandell made changes - 21/Mar/09 07:51 AM

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Sat Mar 21 00:51:04 PDT 2009 [ 1237621864637 ]