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Posted to dev@tomcat.apache.org by Costin Manolache <co...@gmail.com> on 2010/01/06 01:27:42 UTC
Tomcat-Lite update
Hi,
I'm still working on lite - right now my primary goal is to finish the
connector, and have it usable as part of tomcat7, along with
nio and apr connectors. The lite connector is based on nio ( could support
apr as well ), but is intended to be directly usable by
users - it supports both client and server modes, and instead of coyote it
has an API that is very similar with the servlet API - i.e
all methods plus setters for use in client mode.
I gave up on implementing the 3.0 servlet spec - tomcat-lite will only
support running a subset of the servlet API,
for anything else ( and to pass the TCK ) will use the full tomcat. The
'servlet' part will just be a small wrapper on top of the
connector - I don't want the connector to depend on the servlet API , so it
can be used as a http client without requiring the
servlet jars, and to avoid any compatibility requirements.
As features of the connector:
- the low level layer is refactored: instead of a growing ByteBuffer for IO
it uses a list of buffers ( avoids copy ), uses NIO for
charset conversions instead of the former hack, etc. It is also much closer
to apache2 bucket brigades.
- instead of coyote, it uses an API that is based on servlet, with the
addition of the missing getter/setter or pair APIs,
for example Request.setParameter(), Response.getInputStream(), etc. The
idea is to allow people to easily
port servlets, and to use a familiar API in client mode
- it is possible to write handlers that run in the IO thread ( like the http
proxy )
- while most of the code is originally copied from the existing connectors,
a lot has been changed to make it easier to
test and use ( or so I hope ).
I also added a SPDY implementation - this is a binary protocol, similar with
JK - it is supported by chrome browser ( with some flags ).
My goal was to try out the low-level layer - and to evaluate the protocol.
We keep discussion JK replacements - this is one option, and
I guess having the code to try it out wouldn't hurt. The nice thing about
SPDY (compared with JK and http ) is that it's multiplexing
requests - while JK and http are blocking, one TCP connection can't be used
for multiple forwarded http requests. There is also
a header compression option - I haven't done any load tests to see how much
it hurts/helps.
On the help part - obviously review and testing are the biggest needs.
Assuming people are comfortable with a 4th connector - there are
a lot of options that need to be ported, the code currently supports only
the basic requests. Still missing ( and in need of help ):
- compression ( I'm getting close )
- connection management ( working on it )
- sorting out the options in nio/apr and implement them
- make sure all servlet methods work in reverse ( for example
HttpRequest.setParameter(), HttpResponse.getInputStream(), etc ).
Also, I would like to know if other comitters are OK with (temporarily -
i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
so people can try it out. I would like to have it in common/, so it is
visible in servlets - as I mentioned one of the goals is for tomcat-lite
to be more of a library that is used for client http, include
filters/servlets that can be used in any container, etc. When 7.0 is ready
we can
remove it or include it if you feel it's ready.
Costin
Re: Tomcat-Lite update
Posted by Tim Funk <fu...@apache.org>.
+1 - I like the ideas
+0 - [Day job time constraints to help - but I'll look as I can]
-Tim
On 1/5/2010 7:27 PM, Costin Manolache wrote:
> Also, I would like to know if other comitters are OK with (temporarily -
> i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
> so people can try it out. I would like to have it in common/, so it is
> visible in servlets - as I mentioned one of the goals is for tomcat-lite
> to be more of a library that is used for client http, include
> filters/servlets that can be used in any container, etc. When 7.0 is ready
> we can
> remove it or include it if you feel it's ready.
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Re: Tomcat-Lite update
Posted by Rainer Jung <ra...@kippdata.de>.
On 08.01.2010 23:10, Yoav Shapira wrote:
> On Thu, Jan 7, 2010 at 8:29 AM, Konstantin Kolinko
> <kn...@gmail.com> wrote:
>> 2010/1/6 Mark Thomas<ma...@apache.org>:
>>> On 06/01/2010 00:27, Costin Manolache wrote:
>>>> Also, I would like to know if other comitters are OK with (temporarily -
>>>> i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
>>>> so people can try it out.
>>>
>>> How about adding it to the extras build? It could be included in the
>>> release then as well.
>>>
>>> Mark
>>>
>>
>> +1 for extras
>
> +1 for extras as well. Love the ideas.
+1
Rainer
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Re: Tomcat-Lite update
Posted by Yoav Shapira <yo...@apache.org>.
On Thu, Jan 7, 2010 at 8:29 AM, Konstantin Kolinko
<kn...@gmail.com> wrote:
> 2010/1/6 Mark Thomas <ma...@apache.org>:
>> On 06/01/2010 00:27, Costin Manolache wrote:
>>> Also, I would like to know if other comitters are OK with (temporarily -
>>> i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
>>> so people can try it out.
>>
>> How about adding it to the extras build? It could be included in the
>> release then as well.
>>
>> Mark
>>
>
> +1 for extras
+1 for extras as well. Love the ideas.
Yoav
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Re: Tomcat-Lite update
Posted by Konstantin Kolinko <kn...@gmail.com>.
2010/1/6 Mark Thomas <ma...@apache.org>:
> On 06/01/2010 00:27, Costin Manolache wrote:
>> Also, I would like to know if other comitters are OK with (temporarily -
>> i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
>> so people can try it out.
>
> How about adding it to the extras build? It could be included in the
> release then as well.
>
> Mark
>
+1 for extras
Best regards,
Konstantin Kolinko
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Re: Tomcat-Lite update
Posted by Costin Manolache <co...@gmail.com>.
On Fri, Jan 8, 2010 at 11:03 AM, Mark Thomas <ma...@apache.org> wrote:
> On 08/01/2010 18:54, Costin Manolache wrote:
> > Yes. BTW - if you use maven, it'll download, build and test against
> tomcat6
> > jars ( since tomcat7 is not in maven ).
>
> It is a few months out of date but it is there. I was planning on
> another update when I get the EL stuff fixed.
>
> http://people.apache.org/repo/m2-snapshot-repository/org/apache/tomcat/
>
> It should be available via:
>
>
> https://repository.apache.org/content/groups/snapshots-group/org/apache/tomcat/
>
> but most of the JARs are missing. Any hints as to what i did wrong?
>
> Cheers,
>
Well, I don't mind testing and running tomcat-lite against tomcat6 - after
all it is supposed to be
usable with multiple servers and servlet versions :-) I typically build/test
with both maven and ant - to
cover both ( maven tests pass all, ant runs more tests and some are failing
)
Costin
Re: Tomcat-Lite update
Posted by Mark Thomas <ma...@apache.org>.
On 08/01/2010 20:34, Henri Gomez wrote:
> Could you do it again ?
I could (as could any other committer) but I'd rather wait a day or so
until I finish off this JSP/EL work. I'm almost there...
Mark
>
> 2010/1/8 Mark Thomas <ma...@apache.org>:
>> On 08/01/2010 19:12, Henri Gomez wrote:
>>> 2010/1/8 Mark Thomas <ma...@apache.org>:
>>>> On 08/01/2010 18:54, Costin Manolache wrote:
>>>>> Yes. BTW - if you use maven, it'll download, build and test against tomcat6
>>>>> jars ( since tomcat7 is not in maven ).
>>>>
>>>> It is a few months out of date but it is there. I was planning on
>>>> another update when I get the EL stuff fixed.
>>>>
>>>> http://people.apache.org/repo/m2-snapshot-repository/org/apache/tomcat/
>>>>
>>>> It should be available via:
>>>>
>>>> https://repository.apache.org/content/groups/snapshots-group/org/apache/tomcat/
>>>>
>>>> but most of the JARs are missing. Any hints as to what i did wrong?
>>>>
>>>> Cheers,
>>>>
>>>> Mark
>>>
>>> How did you produce and deploy the jars ?
>>
>> Standard release build then:
>> http://svn.apache.org/viewvc/tomcat/trunk/res/maven/mvn-pub.xml
>>
>> Mark
>>
>>
>>
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>
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Re: Tomcat-Lite update
Posted by Henri Gomez <he...@gmail.com>.
Could you do it again ?
2010/1/8 Mark Thomas <ma...@apache.org>:
> On 08/01/2010 19:12, Henri Gomez wrote:
>> 2010/1/8 Mark Thomas <ma...@apache.org>:
>>> On 08/01/2010 18:54, Costin Manolache wrote:
>>>> Yes. BTW - if you use maven, it'll download, build and test against tomcat6
>>>> jars ( since tomcat7 is not in maven ).
>>>
>>> It is a few months out of date but it is there. I was planning on
>>> another update when I get the EL stuff fixed.
>>>
>>> http://people.apache.org/repo/m2-snapshot-repository/org/apache/tomcat/
>>>
>>> It should be available via:
>>>
>>> https://repository.apache.org/content/groups/snapshots-group/org/apache/tomcat/
>>>
>>> but most of the JARs are missing. Any hints as to what i did wrong?
>>>
>>> Cheers,
>>>
>>> Mark
>>
>> How did you produce and deploy the jars ?
>
> Standard release build then:
> http://svn.apache.org/viewvc/tomcat/trunk/res/maven/mvn-pub.xml
>
> Mark
>
>
>
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>
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Re: Tomcat-Lite update
Posted by Mark Thomas <ma...@apache.org>.
On 08/01/2010 19:12, Henri Gomez wrote:
> 2010/1/8 Mark Thomas <ma...@apache.org>:
>> On 08/01/2010 18:54, Costin Manolache wrote:
>>> Yes. BTW - if you use maven, it'll download, build and test against tomcat6
>>> jars ( since tomcat7 is not in maven ).
>>
>> It is a few months out of date but it is there. I was planning on
>> another update when I get the EL stuff fixed.
>>
>> http://people.apache.org/repo/m2-snapshot-repository/org/apache/tomcat/
>>
>> It should be available via:
>>
>> https://repository.apache.org/content/groups/snapshots-group/org/apache/tomcat/
>>
>> but most of the JARs are missing. Any hints as to what i did wrong?
>>
>> Cheers,
>>
>> Mark
>
> How did you produce and deploy the jars ?
Standard release build then:
http://svn.apache.org/viewvc/tomcat/trunk/res/maven/mvn-pub.xml
Mark
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Re: Tomcat-Lite update
Posted by Henri Gomez <he...@gmail.com>.
2010/1/8 Mark Thomas <ma...@apache.org>:
> On 08/01/2010 18:54, Costin Manolache wrote:
>> Yes. BTW - if you use maven, it'll download, build and test against tomcat6
>> jars ( since tomcat7 is not in maven ).
>
> It is a few months out of date but it is there. I was planning on
> another update when I get the EL stuff fixed.
>
> http://people.apache.org/repo/m2-snapshot-repository/org/apache/tomcat/
>
> It should be available via:
>
> https://repository.apache.org/content/groups/snapshots-group/org/apache/tomcat/
>
> but most of the JARs are missing. Any hints as to what i did wrong?
>
> Cheers,
>
> Mark
How did you produce and deploy the jars ?
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Re: Tomcat-Lite update
Posted by Mark Thomas <ma...@apache.org>.
On 08/01/2010 18:54, Costin Manolache wrote:
> Yes. BTW - if you use maven, it'll download, build and test against tomcat6
> jars ( since tomcat7 is not in maven ).
It is a few months out of date but it is there. I was planning on
another update when I get the EL stuff fixed.
http://people.apache.org/repo/m2-snapshot-repository/org/apache/tomcat/
It should be available via:
https://repository.apache.org/content/groups/snapshots-group/org/apache/tomcat/
but most of the JARs are missing. Any hints as to what i did wrong?
Cheers,
Mark
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Re: Tomcat-Lite update
Posted by Henri Gomez <he...@gmail.com>.
Well, I'll take a look a Tomcat Lite and SPDY :)
And see what can be done
2010/1/8 Costin Manolache <co...@gmail.com>:
> On Fri, Jan 8, 2010 at 2:15 AM, Henri Gomez <he...@gmail.com> wrote:
>
>> >> Any comments on including the experimental SPDY support (
>> >> http://www.chromium.org/spdy/spdy-protocol ) ?
>> >> I know we had countless debates on JK2 and http proxies, but some extra
>> code
>> >> to try out doesn't hurt :-)
>> >
>> > We need a httpd module (like mod_proxy_ajp) for that :-)
>>
>> mod_proxy_spdy ? :-)
>>
>> Very interesting thread.
>>
>> BTW, tomcat-lite is still here ?
>>
>> http://svn.apache.org/repos/asf/tomcat/trunk/modules/tomcat-lite/
>>
>>
>
> Yes. BTW - if you use maven, it'll download, build and test against tomcat6
> jars ( since tomcat7 is not in maven ).
> You can use lite as a connector with both 6 and 7. As a client library or
> http server or subset-of-servlet engine it doesn't depend on anything in
> tomcat. The only deps on tomcat are the connector.
> ( of course - a lot is still missing, as I mentioned connection
> management/timeouts/limits need to be added)
>
> Re. mod_proxy_spdy - yes, it would be great if someone could do this. One
> missing feature (mentioned - but not specified yet ) - is negotiating a
> switch, starting as http and switching to spdy if both ends supports it.
> So if you have the spdy code for mod_proxy_spdy - you could also try to hook
> it in the normal HTTP connector.
>
> What spdy does:
> - real long-lived connection - with multiplexed requests, and no connection
> close if a HTTP connection is aborted.
> - back-channel from server to client - would help with all the
> load-balancing ( for real clients will help in a lot of ajax-stuff )
> - some initial negotiation - we can extend it to do some auth / config
> - header and body compression / ssl - the spec seems to have them as
> mandatory, but we don't have to implement it exactly as is, there are flag
> bits
>
> It's certainly not perfect - but not too bad either. I have my doubts about
> how it'll work in real world, with proxies and firewalls - but for
> reverse-proxy and internal use it's better than the current jk and I think
> better than a plain http proxy.
>
> Costin
>
> ( disclaimer: I don't work on spdy, it's a big company - I just saw the
> announcement and seemed a good fit for tomcat )
>
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>>
>
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Re: Tomcat-Lite update
Posted by Costin Manolache <co...@gmail.com>.
On Fri, Jan 8, 2010 at 2:15 AM, Henri Gomez <he...@gmail.com> wrote:
> >> Any comments on including the experimental SPDY support (
> >> http://www.chromium.org/spdy/spdy-protocol ) ?
> >> I know we had countless debates on JK2 and http proxies, but some extra
> code
> >> to try out doesn't hurt :-)
> >
> > We need a httpd module (like mod_proxy_ajp) for that :-)
>
> mod_proxy_spdy ? :-)
>
> Very interesting thread.
>
> BTW, tomcat-lite is still here ?
>
> http://svn.apache.org/repos/asf/tomcat/trunk/modules/tomcat-lite/
>
>
Yes. BTW - if you use maven, it'll download, build and test against tomcat6
jars ( since tomcat7 is not in maven ).
You can use lite as a connector with both 6 and 7. As a client library or
http server or subset-of-servlet engine it doesn't depend on anything in
tomcat. The only deps on tomcat are the connector.
( of course - a lot is still missing, as I mentioned connection
management/timeouts/limits need to be added)
Re. mod_proxy_spdy - yes, it would be great if someone could do this. One
missing feature (mentioned - but not specified yet ) - is negotiating a
switch, starting as http and switching to spdy if both ends supports it.
So if you have the spdy code for mod_proxy_spdy - you could also try to hook
it in the normal HTTP connector.
What spdy does:
- real long-lived connection - with multiplexed requests, and no connection
close if a HTTP connection is aborted.
- back-channel from server to client - would help with all the
load-balancing ( for real clients will help in a lot of ajax-stuff )
- some initial negotiation - we can extend it to do some auth / config
- header and body compression / ssl - the spec seems to have them as
mandatory, but we don't have to implement it exactly as is, there are flag
bits
It's certainly not perfect - but not too bad either. I have my doubts about
how it'll work in real world, with proxies and firewalls - but for
reverse-proxy and internal use it's better than the current jk and I think
better than a plain http proxy.
Costin
( disclaimer: I don't work on spdy, it's a big company - I just saw the
announcement and seemed a good fit for tomcat )
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Re: Tomcat-Lite update
Posted by jean-frederic clere <jf...@gmail.com>.
On 01/08/2010 11:15 AM, Henri Gomez wrote:
>>> Any comments on including the experimental SPDY support (
>>> http://www.chromium.org/spdy/spdy-protocol ) ?
>>> I know we had countless debates on JK2 and http proxies, but some extra code
>>> to try out doesn't hurt :-)
>>
>> We need a httpd module (like mod_proxy_ajp) for that :-)
>
> mod_proxy_spdy ? :-)
Yep that is my idea :-)
Cheers
Jean-Frederic
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Re: Tomcat-Lite update
Posted by Henri Gomez <he...@gmail.com>.
>> Any comments on including the experimental SPDY support (
>> http://www.chromium.org/spdy/spdy-protocol ) ?
>> I know we had countless debates on JK2 and http proxies, but some extra code
>> to try out doesn't hurt :-)
>
> We need a httpd module (like mod_proxy_ajp) for that :-)
mod_proxy_spdy ? :-)
Very interesting thread.
BTW, tomcat-lite is still here ?
http://svn.apache.org/repos/asf/tomcat/trunk/modules/tomcat-lite/
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Re: Tomcat-Lite update
Posted by jean-frederic clere <jf...@gmail.com>.
On 01/07/2010 05:50 PM, Costin Manolache wrote:
> On Wed, Jan 6, 2010 at 12:13 AM, Mark Thomas <ma...@apache.org> wrote:
>
>> On 06/01/2010 00:27, Costin Manolache wrote:
>>> Also, I would like to know if other comitters are OK with (temporarily -
>>> i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
>>> so people can try it out.
>>
>> How about adding it to the extras build? It could be included in the
>> release then as well.
>>
>>
> Sounds good, thanks for the suggestions. On the building part - tomcat-lite
> supports both
> maven and ant, and the ant build is using ivy to download the deps - I will
> keep it
> this way instead of using the tomcat's download tasks, seems easier. So I
> will just call
> lite's build.xml from tomcat extras. Downloading ivy and ivy downloading
> deps is automated.
>
> Any comments on including the experimental SPDY support (
> http://www.chromium.org/spdy/spdy-protocol ) ?
> I know we had countless debates on JK2 and http proxies, but some extra code
> to try out doesn't hurt :-)
We need a httpd module (like mod_proxy_ajp) for that :-)
Cheers
Jean-Frederic
>
> Costin
>
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Re: Tomcat-Lite update
Posted by Henri Gomez <he...@gmail.com>.
Le 7 janv. 2010 à 17:50, Costin Manolache <co...@gmail.com> a écrit :
> On Wed, Jan 6, 2010 at 12:13 AM, Mark Thomas <ma...@apache.org> wrote:
>
>> On 06/01/2010 00:27, Costin Manolache wrote:
>>> Also, I would like to know if other comitters are OK with
>>> (temporarily -
>>> i.e. until the 7.0 release vote) including lite in the tomcat7
>>> builds,
>>> so people can try it out.
>>
>> How about adding it to the extras build? It could be included in the
>> release then as well.
>>
>>
> Sounds good, thanks for the suggestions. On the building part -
> tomcat-lite
> supports both
> maven and ant,
Maven support ? Yesssss
> and the ant build is using ivy to download the deps - I will
> keep it
> this way instead of using the tomcat's download tasks, seems easier.
> So I
> will just call
> lite's build.xml from tomcat extras. Downloading ivy and ivy
> downloading
> deps is automated.
>
> Any comments on including the experimental SPDY support (
> http://www.chromium.org/spdy/spdy-protocol ) ?
> I know we had countless debates on JK2 and http proxies, but some
> extra code
> to try out doesn't hurt :-)
Good idea, tclite could/should be an incubator area
+1
>
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Re: Tomcat-Lite update
Posted by Costin Manolache <co...@gmail.com>.
On Wed, Jan 6, 2010 at 12:13 AM, Mark Thomas <ma...@apache.org> wrote:
> On 06/01/2010 00:27, Costin Manolache wrote:
> > Also, I would like to know if other comitters are OK with (temporarily -
> > i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
> > so people can try it out.
>
> How about adding it to the extras build? It could be included in the
> release then as well.
>
>
Sounds good, thanks for the suggestions. On the building part - tomcat-lite
supports both
maven and ant, and the ant build is using ivy to download the deps - I will
keep it
this way instead of using the tomcat's download tasks, seems easier. So I
will just call
lite's build.xml from tomcat extras. Downloading ivy and ivy downloading
deps is automated.
Any comments on including the experimental SPDY support (
http://www.chromium.org/spdy/spdy-protocol ) ?
I know we had countless debates on JK2 and http proxies, but some extra code
to try out doesn't hurt :-)
Costin
Re: Tomcat-Lite update
Posted by Mark Thomas <ma...@apache.org>.
On 06/01/2010 00:27, Costin Manolache wrote:
> Also, I would like to know if other comitters are OK with (temporarily -
> i.e. until the 7.0 release vote) including lite in the tomcat7 builds,
> so people can try it out.
How about adding it to the extras build? It could be included in the
release then as well.
Mark
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