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Posted to commits@cayenne.apache.org by "Andrus Adamchik (JIRA)" <ji...@apache.org> on 2010/11/14 04:30:26 UTC
[jira] Created: (CAY-1508) Support for DataChannel filters
Support for DataChannel filters
-------------------------------
Key: CAY-1508
URL: https://issues.apache.org/jira/browse/CAY-1508
Project: Cayenne
Issue Type: Task
Components: Core Library
Affects Versions: 3.1M1
Reporter: Andrus Adamchik
Assignee: Andrus Adamchik
Fix For: 3.1M1
Support for DataChannel filters with API similar to ServletFilters, only adapted for Cayenne (i.e. it will be mirroring DataChannel onQuery and onSync methods) :
public interface DataChannelFilter {
void init(DataChannel channel);
QueryResponse onQuery(
ObjectContext originatingContext,
Query query,
DataChannelFilterChain filterChain);
GraphDiff onSync(
ObjectContext originatingContext,
GraphDiff changes,
int syncType,
DataChannelFilterChain filterChain);
}
One difference with ServletFilter is the absence of "destroy" method in DataChannelFilter. Destroy is achieved via @BeforeScopeEnd annotation per filter.
TODO: One possible consequence of this feature is that channel decorators will provide no advantage as a design pattern, and relationships between ObjectContext and its parent DataChannel may not require such a high-level of abstraction (a leaky abstraction for that matter). E.g. we may get rid of DataDomainQuery, returning parent domain the old way via API calls.
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[jira] Closed: (CAY-1508) Support for DataChannel filters
Posted by "Andrus Adamchik (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CAY-1508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrus Adamchik closed CAY-1508.
--------------------------------
Resolution: Fixed
Fix Version/s: (was: 3.1M1)
3.1M2
Checked in the basic implementation of the filter chain attached to the DataDomain. May have some changes as I try it with mixins
> Support for DataChannel filters
> -------------------------------
>
> Key: CAY-1508
> URL: https://issues.apache.org/jira/browse/CAY-1508
> Project: Cayenne
> Issue Type: Task
> Components: Core Library
> Affects Versions: 3.1M1
> Reporter: Andrus Adamchik
> Assignee: Andrus Adamchik
> Fix For: 3.1M2
>
>
> Support for DataChannel filters with API similar to ServletFilters, only adapted for Cayenne (i.e. it will be mirroring DataChannel onQuery and onSync methods) :
> public interface DataChannelFilter {
>
> void init(DataChannel channel);
> QueryResponse onQuery(
> ObjectContext originatingContext,
> Query query,
> DataChannelFilterChain filterChain);
> GraphDiff onSync(
> ObjectContext originatingContext,
> GraphDiff changes,
> int syncType,
> DataChannelFilterChain filterChain);
> }
> One difference with ServletFilter is the absence of "destroy" method in DataChannelFilter. Destroy is achieved via @BeforeScopeEnd annotation per filter.
> DataChannelFilters may be good for tying multiple object lifecycle events together in one context, monitoring performance at the ObjectContext-level, and other good things.
> TODO: One possible consequence of this feature is that channel decorators will provide no advantage as a design pattern, and relationships between ObjectContext and its parent DataChannel may not require such a high-level of abstraction (a leaky abstraction for that matter). E.g. we may get rid of DataDomainQuery, returning parent domain the old way via API calls.
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[jira] Updated: (CAY-1508) Support for DataChannel filters
Posted by "Andrus Adamchik (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CAY-1508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrus Adamchik updated CAY-1508:
---------------------------------
Description:
Support for DataChannel filters with API similar to ServletFilters, only adapted for Cayenne (i.e. it will be mirroring DataChannel onQuery and onSync methods) :
public interface DataChannelFilter {
void init(DataChannel channel);
QueryResponse onQuery(
ObjectContext originatingContext,
Query query,
DataChannelFilterChain filterChain);
GraphDiff onSync(
ObjectContext originatingContext,
GraphDiff changes,
int syncType,
DataChannelFilterChain filterChain);
}
One difference with ServletFilter is the absence of "destroy" method in DataChannelFilter. Destroy is achieved via @BeforeScopeEnd annotation per filter.
DataChannelFilters may be good for tying multiple object lifecycle events together in one context, monitoring performance at the ObjectContext-level, and other good things.
TODO: One possible consequence of this feature is that channel decorators will provide no advantage as a design pattern, and relationships between ObjectContext and its parent DataChannel may not require such a high-level of abstraction (a leaky abstraction for that matter). E.g. we may get rid of DataDomainQuery, returning parent domain the old way via API calls.
was:
Support for DataChannel filters with API similar to ServletFilters, only adapted for Cayenne (i.e. it will be mirroring DataChannel onQuery and onSync methods) :
public interface DataChannelFilter {
void init(DataChannel channel);
QueryResponse onQuery(
ObjectContext originatingContext,
Query query,
DataChannelFilterChain filterChain);
GraphDiff onSync(
ObjectContext originatingContext,
GraphDiff changes,
int syncType,
DataChannelFilterChain filterChain);
}
One difference with ServletFilter is the absence of "destroy" method in DataChannelFilter. Destroy is achieved via @BeforeScopeEnd annotation per filter.
TODO: One possible consequence of this feature is that channel decorators will provide no advantage as a design pattern, and relationships between ObjectContext and its parent DataChannel may not require such a high-level of abstraction (a leaky abstraction for that matter). E.g. we may get rid of DataDomainQuery, returning parent domain the old way via API calls.
> Support for DataChannel filters
> -------------------------------
>
> Key: CAY-1508
> URL: https://issues.apache.org/jira/browse/CAY-1508
> Project: Cayenne
> Issue Type: Task
> Components: Core Library
> Affects Versions: 3.1M1
> Reporter: Andrus Adamchik
> Assignee: Andrus Adamchik
> Fix For: 3.1M1
>
>
> Support for DataChannel filters with API similar to ServletFilters, only adapted for Cayenne (i.e. it will be mirroring DataChannel onQuery and onSync methods) :
> public interface DataChannelFilter {
>
> void init(DataChannel channel);
> QueryResponse onQuery(
> ObjectContext originatingContext,
> Query query,
> DataChannelFilterChain filterChain);
> GraphDiff onSync(
> ObjectContext originatingContext,
> GraphDiff changes,
> int syncType,
> DataChannelFilterChain filterChain);
> }
> One difference with ServletFilter is the absence of "destroy" method in DataChannelFilter. Destroy is achieved via @BeforeScopeEnd annotation per filter.
> DataChannelFilters may be good for tying multiple object lifecycle events together in one context, monitoring performance at the ObjectContext-level, and other good things.
> TODO: One possible consequence of this feature is that channel decorators will provide no advantage as a design pattern, and relationships between ObjectContext and its parent DataChannel may not require such a high-level of abstraction (a leaky abstraction for that matter). E.g. we may get rid of DataDomainQuery, returning parent domain the old way via API calls.
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