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https://issues.apache.org/jira/browse/DERBY-393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12710853#action_12710853
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Alistair Phipps commented on DERBY-393:
---------------------------------------
I solved the same issue by defining a subsubprotocol:
System.setProperty("derby.subSubProtocol.readOnly",
"x.ReadOnlyDirStorageFactory");
package x;
public class ReadOnlyDirStorageFactory extends DirStorageFactory {
@Override
public boolean isReadOnlyDatabase() {
return true;
}
}
Unless I'm missing something, I think this issue can be closed.
> Allow multiple JVMs to have read-only access to the same directory-based
> database
> ---------------------------------------------------------------------------------
>
> Key: DERBY-393
> URL: https://issues.apache.org/jira/browse/DERBY-393
> Project: Derby
> Issue Type: New Feature
> Components: Store
> Reporter: Trejkaz
> Attachments: readonly.patch
>
>
> For an application I'm building, we needed to permit multiple JVMs to access
> the same database.
> We couldn't easily use a network server configuration, as it would be
> difficult to figure out who to connect to since either user might want to
> view the database while the other database is offline.
> We couldn't just dump all the data in a JAR file, as our databases often end
> up being several gigabytes in size.
> So what we really need is a version of the directory store which is treated
> as if it were read-only.
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