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Updated release notes for HttpClient 5.0 alpha 3 release

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Oleg Kalnichevski 2017-11-19 12:50:31 +01:00
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RELEASE_NOTES.txt
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Release 5.0-ALPHA3
-------------------
This is a major release that introduces support for the HTTP/2 protocol and event driven
messaging APIs consistent for all supported HTTP protocol versions.
HttpClient ships with two client implementations:
* HttpClient Classic is based on the classic (blocking) I/O model; largely compatible
with the 4.x APIs; supports HTTP/1.1 only.
* HttpClient Async is based on NIO model; new event driven APIs consistent for all supported
HTTP protocol versions; supports both HTTP/1.1 and HTTP/2.
Notable new features in this release:
* Asynchronous HttpClient implementations optimized for HTTP/2 multiplexed request execution.
* Full support for HTTP caching by asynchronous HttpClient implementations including
streaming message exchanages.
Notable changes and features included in the 5.0 series are:
* Support for the HTTP/2 protocol and conformance to requirements and
recommendations of the latest HTTP/2 protocol specification documents
(RFC 7540, RFC 7541.)
Supported features:
** HPACK header compression
** Stream multiplexing (client and server)
** Flow control
** Response push
** Message trailers
** Expect-continue handshake
** Connection validation (ping)
** Application-layer protocol negotiation (ALPN) on Java 9.0.1+
** TLS 1.2 security features
* Improved conformance to requirements and recommendations of the latest HTTP/1.1 protocol
specification documents (RFC 7230, RFC 7231.)
* Redesigned connection pool implementation with reduced pool lock contention.
* Package name space changed to 'org.apache.hc.client5'.
* Maven group id changed to 'org.apache.httpcomponents.client5'.
* Apache Log4j2 logging APIs used for internal logging instead of Commons Logging APIs.
HttpClient 5.0 releases can be co-located with earlier major versions on the same classpath
due to the change in package names and Maven module coordinates.
Please note that as of 5.0, HttpClient requires Java 1.7 or newer.
Changelog:
-------------------
* HttpAsyncClient implementations optimized for HTTP/2 multiplexed
request execution.
Contributed by Oleg Kalnichevski <olegk@apache.org>
* Improved Ehcache and Memcached storage backends.
Contributed by Oleg Kalnichevski <olegk@apache.org>
* [HTTPCLIENT-1827] Full support for HTTP caching by asynchronous HTTP clients.
Contributed by Oleg Kalnichevski <olegk@apache.org>
* Redesign of HTTP cache resource APIs.
Contributed by Oleg Kalnichevski <olegk@apache.org>
* Deprecated Content-Transfer-Encoding field in MIME body parts per RFC 7578, section 4.7.
Contributed by Oleg Kalnichevski <olegk@apache.org>
* [HTTPCLIENT-293] Implemented the percent encoding of the filename parameter of the Content-Disposition header.
Contributed by Ioannis Sermetziadis <sermojohn@gmail.com>
* [HTTPCLIENT-1845]: Extract InputStreamFactory classes out of GzipDecompressingEntity and
DeflateDecompressingEntity for reuse and to create less garbage.
Contributed by Gary Gregory <ggregory at apache.org>
@ -8,9 +85,14 @@
* [HTTPCLIENT-1858] Alleviate GC pressure due to wire logging.
Contributed by Gary Gregory <ggregory at apache.org>
* Avoid fetching the cached entity twice on cache hit.
Contributed by Leandro Nunes <a-lnunes@hotels.com>
* [HTTPASYNC-124] Add doPrivileged blocks to async client and connection manager builders
Contributed by Jay Modi <jay at elastic dot co>
Release 5.0-ALPHA2
-------------------