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Posted to dev@hc.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2017/12/20 10:50:00 UTC
[jira] [Commented] (HTTPCLIENT-1868) Make memcached storage backend
operation non-blocking
[ https://issues.apache.org/jira/browse/HTTPCLIENT-1868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16298274#comment-16298274 ]
ASF subversion and git services commented on HTTPCLIENT-1868:
-------------------------------------------------------------
Commit 002f40f9d3ec65891b5faf086df404dd3c450600 in httpcomponents-client's branch refs/heads/master from [~olegk]
[ https://git-wip-us.apache.org/repos/asf?p=httpcomponents-client.git;h=002f40f ]
HTTPCLIENT-1824, HTTPCLIENT-1868: Asynchronous HTTP cache storage API; Memcached backend implementation of async HTTP cache storage
> Make memcached storage backend operation non-blocking
> -----------------------------------------------------
>
> Key: HTTPCLIENT-1868
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1868
> Project: HttpComponents HttpClient
> Issue Type: Improvement
> Components: HttpClient (async)
> Affects Versions: 5.0 Alpha2
> Reporter: Jim Horng
> Labels: volunteers-wanted
>
> < Context >
> Since `HttpAysncClient` is non-blocking, but it's operation to memcached at `MemcachedHttpCacheStorage` layer still using blocking I/O manner. Even `spymemcached` client which has non-blocking I/O in nature, but `MemcachedHttpCacheStorage` is using `spymemcached` blocking API.
> < Benefit >
> If all the way in flow of `HttpAsyncClient` is non-blocking, then it can truely do high concurrency with just a few threads, otherwise, performance will be largely impact by blocking calls since there's only a few threads for serving http requests.
> < Code Flow for Blocking manner >
> # `org.apache.http.impl.client.cache.memcached.MemcachedHttpCacheStorage#getEntry` -> `final MemcachedCacheEntry mce = reconstituteEntry(client.get(key));`
> # net.spy.memcached.MemcachedClient#get(java.lang.String)
> Should use `net.spy.memcached.MemcachedClient#asyncGet(java.lang.String)`, but then whole API calling structure require big changes.
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