[HBASE-17008] Examples to make AsyncClient go down easy

• Type: Sub-task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.0.0-alpha-1
• Fix Version/s: 2.0.0-alpha-2, 2.0.0
• Component/s: asyncclient, Client
• Hadoop Flags: Reviewed

Release Note

Add two examples for async client. AsyncClientExample is a simple example to show you how to use AsyncTable. HttpProxyExample is an example for advance user to show you how to use RawAsyncTable to write a fully asynchronous HTTP proxy server. There is no extra thread pool, all operations are executed inside netty's event loop.

• Assignee: Duo Zhang
• Reporter: Michael Stack
• Created: 03/Nov/16 04:57
• Updated: 21/Mar/18 22:08
• Resolved: 14/Jun/17 03:30

Description

The parent issue is about delivering a new, async client. The new client operates at a pretty low level. There will be questions on how best to use it.

Some have come up already over in HBASE-16991. In particular, Apache9 and carp84 talk about the tier they have to put on top of hbase because its API is not user-friendly.

This issue is about adding in the examples, docs., and helper classes we need to make the new async client more palatable to mortals. See HBASE-16991 for instance for an example of how to cache an AsyncConnection that an application might make use of.