Thanks I understand.
I would appreciate if some concrete code or pointer to examples is given
regarding:
1) Create a shared HTTPClient
2) how a given thread is passed=given the shared client and changes,
say, connection timeout AND ALSO its userAgentString.
(the userAgentString is not something I want to change but I try to push
this to its limit).
bw
a.
On 16/05/18 22:54, Oleg Kalnichevski wrote:
On Wed, 2018-05-16 at 15:56 +0000, Daly, Paul wrote:
I canot speak for HttpClient5, but If you are just looking to change
some timeouts on the request, in 4.5.5, I do this (as recommended
from this emai list some time ago!).
I guess its not too differenent for HC5 (?)
- Create a shared HTTPClient instance. this is used by all requests
in the JVM and is instantiated on first use.
- each request (thread) grabs the shared client (it is thread safe)
- each request (thread) creates its own request context
- set the request type specific timeout on the request context (note
internally in our app we apply different timeouts depending on
several factors (message type,client etc))
- execute the request on the shared client with the request context
Seems to work fine...
+1. Precisely how it was intended.
Oleg
Some snippets
// in a client factory class I create the client based on sensible
timeout defaults
// this populates a static httpclient which can be returned by a
static getClient method to all threads needing a httpClient
CloseableHttpClient newClient =
HttpClientBuilder.create().useSystemProperties()
.setDefaultRequestConfig(config).setMaxConnPerRoute(max
ConnectionsPerRoute)
.setMaxConnTotal(totalMaxConnection).evictExpiredConnec
tions()
.evictIdleConnections(idleLife,
TimeUnit.MINUTES).setConnectionTimeToLive(maxLife, TimeUnit.MINUTES)
.build();
statichttpClient = newClient;
// within the request
httpClient = HttpClientFactory.getClient();
// create the context for this thread
HttpClientContext httpContext = HttpClientContext.create();
httpContext.setRequestConfig(getRequestConfig());
HttpResponse serviceResponse = httpClient.execute(httpRequest,
httpContext);
// make the request config
private RequestConfig getRequestConfig() throws
PCEConfigParamNotFoundException {
// setup request timeouts
return RequestConfig.custom().setConnectionRequestTimeout(aaa).
setConnectTimeout(bbb). setSocketTimeout(ccc).build();
}
-----Original Message-----
From: / [mailto:isla...@yahoo.co.uk.INVALID]
Sent: Wednesday, May 16, 2018 4:01 PM
To: httpclient-users@hc.apache.org
Subject: Re: Fwd: HttpClient5 : simple example on how to configure
timeout after build()
Thanks,
if I understood correctly, the pattern should be:
1) Create a RequestConfig (rc) object and keep it.
2) If you need to modify httpclient, modify the kept RequestConfig
object
3) After doing said modifications **re-create httpclient** with kept
RequestConfig.
4) Keep the RequestConfig.
5) Keeping a client and modifying it as see fit is/will be
deprecated.
Questions:
can I extract a RequestConfig from current client, modify its
timeout
and then re-create a client with this cloned-and-modified
RequestConfig?
(so as not to keep a RequestConfig at all but remember all the
settings
I did to my client).
thanks
On 16/05/18 17:42, Shawn Heisey wrote:
On 5/16/2018 8:09 AM, / wrote:
I am looking for an example on how to configure HttpClient5 after
it
has been built and how to extract/print some of its
configuration.
Once I have an HttpClient object, how do I go about and change
some of
its settings, for example connection timeout or user-agent-string
or
even cookie jar?
I am looking for the most straight-forward and efficient way to
do
this. I don't care about "fluent" APIs neither about streams etc.
something like:
myclient.setParameter(connection_timeout, 1000);
For the most part, you can't change settings on an existing
HttpClient
object. Since about 4.3, the objects and methods that allow
clients to
be changed after creation are all deprecated. That capability is
completely gone in 5.x. Default settings are managed with builder
objects using fluent methods, then you create the client object
with the
indicated settings. Here's how I create a client object with
explicit
defaults using non-deprecated code in the 4.5 version:
RequestConfig rc =
RequestConfig.custom().setConnectTimeout(15000)
.setSocketTimeout(120000).build();
httpClient = HttpClients.custom().setDefaultRequestConfig(rc)
.setMaxConnPerRoute(300).setMaxConnTotal(5000).disableAutomaticRetr
ies()
.build();
The httpClient field is an instance of HttpClient. I do not know
what
kind of adjustments might need to be made for 5.x, but that should
give
you an idea about how things are done since the way you're trying
to do
it is no longer available.
Many of the settings you might be interested in can also be changed
at
the request level. I do not know HOW to do this, only that it CAN
be
done. I think this is what Oleg was referring to in his reply.
Thanks,
Shawn
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