Re: [jetty-users] Communication between a Servlet and a custom protocol

[Jan Bartel <janb@xxxxxxxxxxx>]

Josh,

In your etc/test.xml file, set the shared resource as an attribute on the Server:

<Configure id="Server" class="org.eclipse.jetty.server.Server">

    <Call name="setAttribute">
        <Arg>myserverfoo</Arg>
        <Arg>HELLO</Arg>
    </Call>

</Configure>

In your webapps/servlet.xml, you can refer to the Server instance and retrieve the attribute, and set it as a context attribute instead:

<Configure class="org.eclipse.jetty.webapp.WebAppContext">
  <Ref refid="Server">
      <Call id="myserverfoo" name="getAttribute"><Arg>myserverfoo</Arg></Call>
  </Ref>

  <Call name="setAttribute">
       <Arg>mycontextfoo</Arg>
       <Arg><Ref refid="myserverfoo"/></Arg>
  </Call>
</Configure>

regards

Jan

On Mon, 27 Jan 2020 at 22:40, Josh Spiegel <joshlakewg@xxxxxxxxx> wrote:

Simone, 

Thanks again.  Bug it seems the webapp configuration can't reference ids set by the server module.  Am I missing something?  Here is what I tried:

./webapps/servlet.xml

<Configure class="org.eclipse.jetty.webapp.WebAppContext">

  <Set name="contextPath">/ServletExample</Set>

  <Set name="war">/Users/..../ServletExample.war</Set>

  <Get class="java.lang.System" name="out">

   <Call name="println">

    <Arg>######### SERVLET ##############</Arg>

   </Call>

  </Get>

  <Get class="java.lang.System" name="out">

   <Call name="println">

    <Arg><Ref refid="myContext"/></Arg>

   </Call>

  </Get>

</Configure>

./modules/test.mod

[xml]

etc/test.xml

./etc/test.xml

<Configure id="Server" class="org.eclipse.jetty.server.Server">

  <Map id="myContext">

    <Entry>

      <Item>test</Item>

      <Item>foo</Item>

    </Entry>

  </Map>

  <Get class="java.lang.System" name="out">

   <Call name="println">

    <Arg>######### test.xml ##############</Arg>

   </Call>

  </Get>

  <Get class="java.lang.System" name="out">

   <Call name="println">

    <Arg><Ref refid="myContext"/></Arg>

   </Call>

  </Get>

</Configure>

> java -jar start.jar --add-module=test

2020-01-27 13:38:20.070:INFO::main: Logging initialized @467ms to org.eclipse.jetty.util.log.StdErrLog

######### test.xml ##############

{test=foo}

2020-01-27 13:38:20.286:INFO:oejs.Server:main: jetty-9.4.26.v20200117; built: 2020-01-17T12:35:33.676Z; git: 7b38981d25d14afb4a12ff1f2596756144edf695; jvm 1.8.0_201-b09

2020-01-27 13:38:20.301:INFO:oejdp.ScanningAppProvider:main: Deployment monitor [file:///Users/..../jetty-distribution-9.4.26.v20200117/webapps/] at interval 1

######### SERVLET ##############

null

Notice the servlet.xml reference to "myContext" prints null.

Thanks,

Josh

On Mon, Jan 27, 2020 at 7:24 AM Simone Bordet <sbordet@xxxxxxxxxxx> wrote:

Hi,

On Mon, Jan 27, 2020 at 3:58 PM Josh Spiegel <joshlakewg@xxxxxxxxx> wrote:
>
> Thanks.  I can definitely break things up and use a module.  However, using webapps and configuring WebAppContext via mywar.xml doesn't seem to work since the call to webAppContext.getServer() returns null at the time the WebAppContext is configured.

<Map id="myContext"> will allow you to obtain the map by using <Ref
refid="myContext"/> so you don't need the Server anymore.

--
Simone Bordet
----
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