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From Viral Bajaria <viral.baja...@gmail.com>
Subject Re: AsyncHBase 1.5.0 has been released
Date Wed, 29 Jan 2014 17:58:31 GMT
Are you looking to trigger endpoint coprocessors ?


On Wed, Jan 29, 2014 at 2:33 AM, ripsacCTO <ankur.ju@gmail.com> wrote:

> Hi Tsuna,
> Is there any support for coprocessors ?
> On Saturday, January 25, 2014 3:58:16 AM UTC+5:30, tsuna wrote:
>> Hi all,
>> after 3 months in RC2 and 2 more months past that, I'm happy to
>> announce that AsyncHBase 1.5.0 is now officially out. AsyncHBase
>> remains true to its initial promise: the API is still backward
>> compatible, but under the hood it continues to work with all
>> production releases of HBase of the past few years.
>> This release was tested against HBase 0.89, 0.90, 0.92, 0.94, and
>> 0.96.  On HBase 0.96, the performance is looking great, with
>> AsyncHBase still outperforming HTable by about 2x.
>> Tag: https://github.com/OpenTSDB/asynchbase/tree/v1.5.0
>> Pre-built <https://github.com/OpenTSDB/asynchbase/tree/v1.5.0Pre-built>jar:
>> http://code.google.com/p/opentsdb/downloads/detail?
>> name=asynchbase-1.5.0.jar
>> The release is also available in Maven central.
>> * Version 1.5.0 (2013-12-13) [67fc3b7]
>> This release introduces compatibility with HBase 0.96 and up, and adds
>> a dependency on Google's protobuf-java library.  Note that HBase 0.95.x,
>> which was a "developer preview" release train, is NOT supported.
>> Please note that support for explicit row locks has been removed from
>> HBase 0.95 and up.  While the classes and functionality remain usable
>> when using earlier versions of HBase, an `UnsupportedOperationException'
>> will be raised if one attempt to send a `RowLockRequest' to a newer
>> version of HBase.
>> Please note that while AsyncHBase never made any guarantees about
>> the exact order in which multiple edits are applied within a batch,
>> the order is now different when talking to HBase 0.96 and up.
>> New public APIs:
>>   - Scanners can now use a variety of different filters via the new
>>     `ScanFilter' interfaces and its various implementations.
>>   - It's possible to specify specific families to scan via `setFamilies'.
>>   - Scanners can put an upper bound on the amount of data fetched by RPC
>>     via the new `setMaxNumKeyValues' (works with HBase 0.96 and up only).
>>   - HBaseRpc now has a `failfast()' and a `setFailfast(boolean)' pair
>>     of methods to allow RPCs to fail as soon as their encounter an
>>     issue out of the ordinary (e.g. not just a `NotSuchRegionException').
>>   - `GetRequest' has additional constructor overloads that make its API
>>     more uniform with that of other RPCs.
>>   - HBaseClient has new `prefetchMeta' methods to prefetch metadata about
>>     the regions of a table (for the entire table or a given key range).
>> Noteworthy bug fixes:
>>   - DeleteRequest wasn't honoring its timestamp if one was given (#58).
>>   - When a connection attempt fails, buffered RPCs weren't cleaned up
>>     or retried properly.
>>   - When one RPC fails because of another one (e.g. we fail to send an
>>     RPC because a META lookup failed), the asynchronous exception that
>>     is given to the callback now properly carries the original RPC that
>>     failed.
>>   - There was an unlikely race condition that could cause an NPE while
>>     trying to retrieve the ROOT region from ZooKeeper.
>>   - There was an unlikely race if the client got disconnected right
>>     after successfully establishing a connection to a RegionServer, while
>>     it was flushing RPC buffered while waiting to be connected.  Also
>>     when those RPCs were flushed, the batchable RPCs weren't given a
>>     chance to get batched.
>>   - It was not possible to scan the ROOT region (or the hbase:meta region
>>     when using HBase 0.96+).
>> $ git diff --stat v1.4.1..v1.5.0 | tail -n 1
>>  72 files changed, 5213 insertions(+), 540 deletions(-)
>> (a fair amount of the new lines comes from all the .proto files
>> imported from HBase's source tree)
>> $ git shortlog v1.4.1..v1.5.0
>> Andrey Stepachev (1):
>>       Add support for multiple families/qualifiers in scanners.
>> Benoit Sigoure (76):
>>       Start v1.5.0.
>>       Add Viral to AUTHORS for his work on ScanFilter.
>>       Document ScanFilter and prevent it from being subclassed
>> externally.
>>       Convert the regexp key filtering mechanism to the ScanFilter.
>>       Document how to run integration tests.
>>       Enhance filters a bit and add integration tests.
>>       Add a new helper function to produce better errors during tests.
>>       Mention new scanner filters in NEWS.
>>       Allow RPCs to fail-fast.
>>       Update NEWS / THANKS.
>>       Update suasync to 1.3.2.
>>       Properly clean up when connection fails before being opened.
>>       Properly report which RPC has failed in HasFailedRpcException.
>>       Fix a small race condition when looking up the ROOT region.
>>       Add HBase protocol buffers to the compilation process.
>>       De-serialize the HBase 0.95+ znode that points to META.
>>       Fix the process of META lookups for HBase 0.95 and up.
>>       Send the proper "hello" message to HBase 0.95 and up.
>>       Remove some unused helper code to create buffers.
>>       Update the per-RPC header for HBase 0.95+.
>>       Refactor how RPC objects know what RPC method they're for.
>>       Compile Java code generated from protobuf files separately.
>>       Kill some trailing whitespaces.
>>       Add a helper function to de-serialize Protocol Buffer VarInt32.
>>       Add a semi-evil helper class to avoid copying byte arrays from
>> protobufs.
>>       De-serialize RPC responses from HBase 0.95+.
>>       Add a helper function to de-serialize protocol buffers.
>>       Handle META lookups with 0.95+.
>>       Dedup byte arrays when deserializing KeyValues from 0.95+.
>>       Make sure we have all the data we need before de-serializing.
>>       Convert GetRequest to HBase 0.95+.
>>       Convert AtomicIncrementRequest to HBase 0.95+.
>>       Make the run target depend on the jar.
>>       Sync protobuf files with changes made in the HBase 0.95 branch.
>>       Add some make variables for the compilers used.
>>       Add support for "cell blocks".
>>       Avoid unnecessary string copies on each RPC.
>>       Convert scanners and filters to HBase 0.95+.
>>       Add a missing accessor to retrieve the max number of KVs on a
>> Scanner.
>>       Expose HBase 0.95's ability to limit the number of bytes
>> returned by a scanner.
>>       Log the channel when logging outgoing RPCs.
>>       Convert single-put RPCs to HBase 0.95+.
>>       Ensure that RPCs that shouldn't get cell blocks don't.
>>       Convert the CAS RPC to HBase 0.95+.
>>       Convert single-Delete RPCs to HBase 0.95+.
>>       Catch up with the protobuf changes made in 0.96
>>       Explicit row locks are no longer supported in HBase 0.95 and up.
>>       The 'getProtocolVersion' RPC no longer exists in 0.95+.
>>       Add support for batched edits with HBase 0.96+.
>>       Optimize multi-action a bit with HBase 0.95+ by sorting less.
>>       Remove some warnings that come up when compiling with JDK 7.
>>       Note that ColumnRangeFilter was added in HBase 0.92.
>>       Upgrade to logback 1.0.13.
>>       Upgrade to SLF4J 1.7.5.
>>       Make sure to not schedule timers with a negative timeout.
>>       Add some constructor overloads for GetRequest.
>>       Upgrade to async 1.4.0.
>>       Add a couple integration tests covering
>> NoSuchColumnFamilyException.
>>       Fix distclean: remove com/google/protobuf from the build directory.
>>       Update NEWS for the v1.5.0 release.
>>       Prevent warnings due to generated protobuf classes.
>>       Properly flush queued up RPCs upon connecting.
>>       Make sure we compile for Java 6.
>>       Add a note regarding some infuriating limitations of the JRE.
>>       Fix an edge case in HBase 0.96 one-shot scanners.
>>       Add/improve a few toString() methods.
>>       Fix accesses to "hbase:meta".
>>       Make Scanner usable with -ROOT- / hbase:meta.
>>       Handle an edge case with `prefetchMeta' related to 0.96
>> compatibility.
>>       Update NEWS/THANKS/AUTHORS.
>>       Fix the distclean rule so we can distclean twice in a row.
>>       Have pom.xml cleaned during `distclean'.
>>       Upgrade to Netty 3.8.0.
>>       Fix bug in deserialization of the `Multi' RPC in HBase 0.96
>>       Add additional logging when decoding fails with an uncaught
>> exception.
>>       Release 1.5.0.
>> Brandon Forehand (1):
>>       Add support for prefetching the meta region.
>> Phil Smith (1):
>>       Here's some one-liners to compile and run tests.
>> St.Ack (1):
>>       Make mvn build accomodate protobuf files
>> Viral Bajaria (2):
>>       Initial commit for ScanFilter.
>>       Add more scanner filters.
>> Xun Liu (2):
>>       Properly honor timestamps in DeleteRequest.
>>       Add support to delete a value at the specified timestamp.
>> --
>> Benoit "tsuna" Sigoure

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