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https://issues.apache.org/jira/browse/DERBY-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jørgen Løland updated DERBY-3051:
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Attachment: derby_3051_1b.diff
derby_3051_1b.stat
Attaching a patch, v1b, incorporating comments from Narayanan and Øystein.
Narayanan: You are correct; before the stopReplicationMaster method is ever
called, startReplicationMaster has been called. This means that in read only
databases, a "cannot replicate readonly database" exception has already been
thrown.
> Replication: Modify logging subsystem to append log records to the
> replication buffer when in replication master mode
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3051
> URL: https://issues.apache.org/jira/browse/DERBY-3051
> Project: Derby
> Issue Type: Sub-task
> Components: Services, Store
> Affects Versions: 10.4.0.0
> Reporter: Jørgen Løland
> Assignee: Jørgen Løland
> Attachments: derby_3051_1.diff, derby_3051_1.stat,
> derby_3051_1b.diff, derby_3051_1b.stat
>
>
> When Derby has the replication master role for a database 'x', it should ship
> all log records generated for this database to the Derby with the slave role.
> A replication buffer was added to Derby in DERBY-2926. This issue is for
> modifying the logging subsystem to append log records to this buffer every
> time a log records is appended to the disk buffer (LogAccessFile). This will,
> of course, only be done if it has the master role.
> Currently, I have identified two modifications that will be required in
> LogToFile:
> * LogToFile#appendLogRecord needs to append to the replication buffer after
> appending to the disk buffer
> * LogToFile#flush (i.e., the method used to force buffered log records to
> disk) must notify the Master Controller (DERBY-2977) that a flush has taken
> place. The MasterController will decide if any action is required because of
> this.
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