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Date: Wed, 22 Aug 2007 04:18:30 -0700 (PDT)
From: =?utf-8?Q?J=C3=B8rgen_L=C3=B8land_=28JIRA=29?= <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Updated: (DERBY-3016) Replication: Add code that parses a
 chunk of log records (byte[]) into individual log records
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     [ https://issues.apache.org/jira/browse/DERBY-3016?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:all-tabpanel ]

J=C3=B8rgen L=C3=B8land updated DERBY-3016:
---------------------------------

    Attachment: slave_logscan_1.diff
                slave_logscan_1.stat

The attached patch, v1, contains a class ReplicationLogScan that will be us=
ed to parse chunks of log received from the master. It contains an implemen=
tation for reading int, long and bytes from a byte[] instead of using java.=
nio.ByteBuffer. As discussed in DERBY-2926, this is done in case we want to=
 allow replication in j2me applications.

The patch also adds a new error code to SQLState.java. I chose error codes =
XRExx to be the range for replication errors since X is an implementation s=
pecific range according to the SQL standard, and XRE fits the naming patter=
n used for other derby specific error messages.

> Replication: Add code that parses a chunk of log records (byte[]) into in=
dividual log records=20
> -------------------------------------------------------------------------=
---------------------
>
>                 Key: DERBY-3016
>                 URL: https://issues.apache.org/jira/browse/DERBY-3016
>             Project: Derby
>          Issue Type: Sub-task
>          Components: Services
>    Affects Versions: 10.4.0.0
>            Reporter: J=C3=B8rgen L=C3=B8land
>            Assignee: J=C3=B8rgen L=C3=B8land
>         Attachments: slave_logscan_1.diff, slave_logscan_1.stat
>
>
> The derby instance that has the slave role for a database 'x' has to redo=
 log records sent from the master. These log records are sent in chunks as =
a byte[]. To be useful to the slave, these chunks of log records must be pa=
rsed into individual log records.=20
> The actual format of the received log record chunks is defined by the rep=
lication log buffer (see DERBY-2926).

--=20
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