Add support for HBase 0.90 in asynchbase.

0001-Add-support-for-HBase-0.90.patch

From 7a538914c93f8a92b9c80e5c533e73d97e8423c8 Mon Sep 17 00:00:00 2001
From: Benoit Sigoure <tsuna@stumbleupon.com>
Date: Thu, 27 Jan 2011 17:33:37 -0800
Subject: [PATCH] Add support for HBase 0.90.

In order to enable the new code, the JVM must be given the following
system property in argument:
  -Dorg.hbase.async.v0.90

For HBASE-3174, revision r1029115 (or 08e64aae in Git) changed the
on-wire serialization of Get in a non-backwards compatible way.
Ultimately hbaseasync should be able to work around that by using
the `getProtocolVersion' RPC to automagically figure this out and
do the right thing.

Change-Id: Ic3ee9f1ae350529c0968ddb489667a0f3ffb2d2c
---
 src/GetRequest.java |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/src/GetRequest.java b/src/GetRequest.java
index 6d9a656..9f965da 100644
--- a/src/GetRequest.java
+++ b/src/GetRequest.java
@@ -39,6 +39,16 @@ import org.jboss.netty.buffer.ChannelBuffer;
  */
 public final class GetRequest extends HBaseRpc {
 
+  /**
+   * Are we going to talk to HBase 0.90?.
+   * For HBASE-3174, revision r1029115 (or 08e64aae in Git) changed the
+   * on-wire serialization of Get in a non-backwards compatible way.
+   * TODO(tsuna): Use the getProtocolVersion RPC to automagically figure
+   * this out and do the right thing.
+   */
+  private static final boolean hbase090 =
+    System.getProperty("org.hbase.async.v0.90") != null;
+
   private static final byte[] GET = new byte[] { 'g', 'e', 't' };
   private static final byte[] EXISTS =
     new byte[] { 'e', 'x', 'i', 's', 't', 's' };
@@ -163,6 +173,9 @@ public final class GetRequest extends HBaseRpc {
     size += 8;  // long: Lock ID.
     size += 4;  // int:  Max number of versions to return.
     size += 1;  // byte: Whether or not to use a filter.
+    if (hbase090) {
+      size += 1;  // byte: Whether or not to cache the blocks read.
+    }
     size += 8;  // long: Minimum timestamp.
     size += 8;  // long: Maximum timestamp.
     size += 1;  // byte: Boolean: "all time".
@@ -196,6 +209,9 @@ public final class GetRequest extends HBaseRpc {
     buf.writeLong(lockid);  // Lock ID.
     buf.writeInt(1);     // Max number of versions to return.
     buf.writeByte(0x00); // boolean (false): whether or not to use a filter.
+    if (hbase090) {
+      buf.writeByte(0x01); // boolean (true): whether or not to cache the blocks.
+    }
     // If the previous boolean was true:
     //   writeByteArray(buf, filter name as byte array);
     //   write the filter itself
-- 
1.7.4.rc1.8.g429be

git clone git://github.com/stumbleupon/asynchbase.git
cd asynchbase
curl https://gist.github.com/raw/799658/6019df10a98f9e841a50d3f245291c394c450532/0001-Add-support-for-HBase-0.90.patch | git am -
make

Then simply copy build/hbaseasync-1.0.jar into the third_party/hbase directory of OpenTSDB.