[weld-dev] How to use Weld servlet Env with Grizzly?

[Alex Sviridov]

Hi all,

I found out that in order to control instance creating in Grizzly it is necessary
to override some methods in WebappContext. So I created these two classes:
https://github.com/PavelKastornyy/weld-core/tree/master/environments/servlet/core/src/main/java/org/jboss/weld/environment/grizzly  
However, objects are not injected in servlets as expected. Could anyone of Weld developers comment my code?

Best regards, Alex


>Понедельник, 21 мая 2018, 17:49 +03:00 от Martin Kouba <mkouba at redhat.com>:
>
>Dne 21.5.2018 v 16:44 Alex Sviridov napsal(a):
>> Hi Martin,
>> 
>> Thank you for your answer. I implemented half of container -
>>  https://github.com/PashaTurok/core/blob/master/environments/servlet/core/src/main/java/org/jboss/weld/environment/grizzly/GrizzlyContainer.java
>> 
>> and changed WeldServletLifecycle 
>>  https://github.com/PashaTurok/core/blob/20398c204f4e24d2a6f1c1ea3bc1d9381ff8f25f/environments/servlet/core/src/main/java/org/jboss/weld/environment/servlet/WeldServletLifecycle.java#L363
>> 
>> 
>> To use my Context I do:
>> WebappContext webContext = new WebappContext("WebappContext", "");
>> Listener listener = new Listener();
>> webContext.addListener(listener);
>> webContext.deploy(server);
>> 
>> to add some servlet/filter to Grizzly WITHOUT CDI I do :
>> ServletRegistration registration = 
>> webContext.addServlet("ServletContainer",  (Class<Servlet>) 
>> Class.forName("org.temp.TestServlet"));
>> registration.addMapping("/");
>> 
>> I've looked through undertow WeldServletExtension but can't understand 
>> when and where this extension is called.
>
>In undertow an extension is a service provider of 
>io.undertow.servlet.ServletExtension, loaded automatically during 
>startup (see also java.util.ServiceLoader). You need to find out how and 
>where Grizzly allows to customize the instantiation/injection of 
>components.
>
>> As I understand I need to make Grizzly webContext use CDI, so I need to 
>> make some factory for every
>> servlet/filter/listener that will create instances of them using 
>> BeanManager and make Grizzly to use
>> these factories. But where is the point where these factories will be 
>> used? Could you show me the direction?
>> 
>> Best regards, Alex
>> 
>>     Понедельник, 21 мая 2018, 15:23 +03:00 от Martin Kouba
>>     < mkouba at redhat.com >:
>> 
>>     Hi Alex,
>> 
>>     do you have some publicly available project so that we can discuss a
>>     real code?
>> 
>>     In general, if you want to integrate Weld servlet with a custom servlet
>>     container:
>> 
>>     1. Implement org.jboss.weld.environment.servlet.Container, e.g.
>>     GrizzlyContainer
>>         - Container#touch() should return true if a specific container is
>>     detected
>>        - Container#initialize() and Container#destroy() can be used to
>>     init/cleanup the container
>>        - note that ContainerContext#getManager() returns a BeanManager
>>     which
>>     could be used later, e.g. for dependency injection; you can also obtain
>>     a BeanManager from the servlet context - see for example [1]
>> 
>>     2. Implement a container specific "injection support"
>>     - each servlet container should provide its own SPI - you should
>>     implement this SPI so that injection into servlets, listeners and
>>     filters is supported; see for example [2] how undertow support is
>>     implemented
>> 
>>     3. There is no need to "connect" EnhancedListener in any way. It should
>>     be registeded automatically. However, if you're trying to run an
>>     embedded servlet container you will need to register
>>     org.jboss.weld.environment.servlet.Listener manually.
>> 
>>     Martin
>> 
>> 
>>     [1]
>>  https://github.com/weld/core/blob/master/environments/servlet/core/src/main/java/org/jboss/weld/environment/undertow/WeldInstanceFactory.java#L56
>> 
>>     [2]
>>  https://github.com/weld/core/blob/master/environments/servlet/core/src/main/java/org/jboss/weld/environment/undertow/WeldServletExtension.java
>> 
>>     Dne 18.5.2018 v 19:52 Alex Sviridov napsal(a):
>>      > Hi all
>>      >
>>      > Could anyone explain how to connect WebappContext that implements
>>      > ServletContext, to
>>      > Weld servlet env? I've read the code, but still can't understand
>>     how to
>>      > connect SomeContainer,
>>      > that implements servlet.Container, EnhancedListener and Grizzly
>>      > WebappContext? Could anyone
>>      > describe main principles how to do it? I would be very thankful.
>>      >
>>      > --
>>      > Best regards, Alex Sviridov
>>      >
>>      >
>>      > _______________________________________________
>>      > weld-dev mailing list
>>      >  weld-dev at lists.jboss.org <mailto:weld-dev at lists.jboss.org>
>>      >  https://lists.jboss.org/mailman/listinfo/weld-dev
>>      >
>> 
>>     -- 
>>     Martin Kouba
>>     Senior Software Engineer
>>     Red Hat, Czech Republic
>> 
>> 
>> 
>> -- 
>> Alex Sviridov
>
>-- 
>Martin Kouba
>Senior Software Engineer
>Red Hat, Czech Republic


-- 
Alex Sviridov
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