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Release notes tweaks for the upcoming release.

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git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1794227 13f79535-47bb-0310-9956-ffa450edef68
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Gary D. Gregory 2017-05-07 17:08:16 +00:00
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RELEASE_NOTES.txt
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@ -1,48 +1,49 @@
Release 5.0-ALPHA2 Release 5.0-ALPHA2
------------------- -------------------
This is a major release that introduces support for HTTP/2 protocol and event driven 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. messaging APIs consistent for all supported HTTP protocol versions.
HttpClient ships with two client implementations: HttpClient ships with two client implementations:
* Classic: it is based on the classic (blocking) I/O model; largely compatible * HttpClient Classic is based on the classic (blocking) I/O model; largely compatible
with the 4.x APIs; supports HTTP/1.1 only. with the 4.x APIs; supports HTTP/1.1 only.
* Async: based on NIO model; new event driven APIs consistent for all supported * 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. HTTP protocol versions; supports both HTTP/1.1 and HTTP/2.
Notable changes and features included in the 5.0 series are: Notable changes and features included in the 5.0 series are:
* Partial support for HTTP/2 protocol and conformance to requirements and * Partial support for the HTTP/2 protocol and conformance to requirements and
recommendations of the latest HTTP/2 protocol specification (RFC 7540, RFC 7541) recommendations of the latest HTTP/2 protocol specification documents
(RFC 7540, RFC 7541.)
Supported features: Supported features:
** HPACK header compression ** HPACK header compression
** stream multiplexing (client and server) ** Stream multiplexing (client and server)
** flow control ** Flow control
** response push ** Response push
** message trailers ** Message trailers
** expect-continue handshake ** Expect-continue handshake
** connection validation (ping) ** Connection validation (ping)
** application-layer protocol negotiation (ALPN) on Java 1.9+ ** Application-layer protocol negotiation (ALPN) on Java 1.9+
** TLS 1.2 security features ** TLS 1.2 security features
* Improved conformance to requirements and recommendations of the latest HTTP/1.1 protocol * Improved conformance to requirements and recommendations of the latest HTTP/1.1 protocol
specification (RFC 7230, RFC 7231) specification documents (RFC 7230, RFC 7231.)
* Redesigned connection pool implementation with reduced pool lock contention. * Redesigned connection pool implementation with reduced pool lock contention.
* Package name space changed to 'org.apache.hc.client5' * Package name space changed to 'org.apache.hc.client5'.
* Maven group id changed to 'org.apache.httpcomponents.client5' * Maven group id changed to 'org.apache.httpcomponents.client5'.
* Apache Log4j2 logging APIs used for internal logging instead of Commons Logging APIs * Apache Log4j2 logging APIs used for internal logging instead of Commons Logging APIs.
Fetures presently that are presently NOT supported: Features that are presently NOT supported:
* HTTP/2 transport (classic) * HTTP/2 transport (classic)
@ -53,11 +54,12 @@ Fetures presently that are presently NOT supported:
* Caching (async) * Caching (async)
HttpClient 5.0 releases can be co-located with earlier versions. 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. Please note that as of 5.0, HttpClient requires Java 1.7 or newer.
Please note that at this point 5.0 APIs are considered API experimental and unstable and are Please note that at this point 5.0 APIs are considered experimental and unstable and are
expected to change in the coming releases without providing a migration path. expected to change in the coming releases without providing a migration path.