[
https://issues.apache.org/jira/browse/HBASE-22622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16872617#comment-16872617
]
Andrew Purtell commented on HBASE-22622:
----------------------------------------
Something like this:
{code}
diff --git a/hbase-protocol/src/main/protobuf/WAL.proto
b/hbase-protocol/src/main/protobuf/WAL.proto
index a888686107..3ac0d33aa1 100644
--- a/hbase-protocol/src/main/protobuf/WAL.proto
+++ b/hbase-protocol/src/main/protobuf/WAL.proto
@@ -65,13 +65,12 @@ message WALKey {
optional uint64 nonce = 10;
optional uint64 orig_sequence_number = 11;
-/*
- optional CustomEntryType custom_entry_type = 9;
+ repeated Attribute attrs = 12;
+}
- enum CustomEntryType {
- COMPACTION = 0;
- }
-*/
+message Attribute {
+ required bytes name = 1;
+ required bytes value = 2;
}
{code}
and in WALKey
{code}
+ /**
+ * @param name attribute name
+ * @return attribute value, or null if unset
+ */
+ public byte[] getAttribute(byte[] name) {
...
+ }
+
+ /**
+ * @param name attribute name
+ * @param value attribute value
+ */
+ public void setAttribute(byte[] name, byte[] value) {
...
+ }
{code}
> WALKey Extended Attributes
> --------------------------
>
> Key: HBASE-22622
> URL: https://issues.apache.org/jira/browse/HBASE-22622
> Project: HBase
> Issue Type: New Feature
> Components: wal
> Reporter: Geoffrey Jacoby
> Assignee: Geoffrey Jacoby
> Priority: Major
>
> It would be useful if the WAL protobuf and WALKey class included an optional
> map of extended key/value attributes that downstream coprocessors could use
> to annotate WAL Entries. While standard HBase replication would not use them,
> custom replication endpoints could use the data to make filtering decisions
> or take actions.
> An example use case would be allowing a tool like Phoenix to annotate
> WAL.Entries to indicate that a given Entry is associated with a particular
> Phoenix view rather than the base Phoenix table. (Multiple logical views in
> Phoenix can map to the same physical HBase table.) A custom replication
> endpoint might choose to replicate some views but not others.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
