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From "Pinaki Poddar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-117) Collection of TransactionListeners registered to a Broker should be available as unmodifiable collection
Date Tue, 30 Jan 2007 18:00:37 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12468719
] 

Pinaki Poddar commented on OPENJPA-117:
---------------------------------------

The use case is the code that intends to register a listener but gets the PersistenceManager/EntityManager
from another layer outside of its own control. Then the registerer does not know whether the
obtained PM/EM is already carrying a particular listener or not. Currently the internal collection
of listener is not a Set, so unconditionally adding a listener results in duplicates. 

> Collection of TransactionListeners registered to a Broker should be available as unmodifiable
collection
> --------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-117
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-117
>             Project: OpenJPA
>          Issue Type: Improvement
>          Components: kernel
>            Reporter: Pinaki Poddar
>         Assigned To: Pinaki Poddar
>            Priority: Minor
>
> Currently TransactionListeners can be added/removed to a broker but the list of transaction
listeners registered to a particular broker is not available. Such a collection can be made
available in read-only mode so a caller can determine whether to add a new listener or not,
or whether a particular listener is already registered. 

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