Joakim,
thx for pointing me to the examples. I managed to do what I wanted,
by using ResourceHandler together with WebAppContext. while working on
it, it turned out, that I don't even need to enable aliases, as I can
just choose
resourceBase pointing to my target dir, for the new ResourceHandler. And
I attached it at the context, where symlink was supposed to be - so it works
like alias. I left alias setting enabled in code below, just for
reference if someone else
would be looking for it. Also I noticed that for WebAppContext
setAliases(true) didn't
really make symlinks work, and this is primary why I got confused. But
it did
work with ResourceHandler. So what's the meaning of this setting for a
WebAppContext, why is it different?
Anyway here is what I ended up with:
val port = portFromCommandLine.getOrElse(Props.getInt("jetty.emb.port",
9090))
val connector = new SelectChannelConnector()
connector.setPort(port)
println("USING PORT: " + port)
val server = new Server()
server.addConnector(connector)
val webctx = new WebAppContext
/* use embedded webapp dir as source of the web content
* web.xml is in default location, of embedded webapp dir,
* so don't need to adjust that */
val webappDirInsideJar =
webctx.getClass.getClassLoader.getResource("webapp").toExternalForm
webctx.setWar(webappDirInsideJar)
/* might use use external pre-existing webapp dir instead of
referencing
* the embedded webapp dir but it's not very useful. why would we put
* webapp inside jar if we end up using some other external webapp dir.
* I put it for reference, as it may make sense under some
circumstances.
* webctx.setResourceBase("/path/to/existing/webapp-dir") */
webctx.setContextPath("/")
/* optionally extract embedded webapp to specific temporary
location and serve
* from there. Often /tmp is used, but it is not always advisable,
because it
* gets cleaned-up from time to time, so you need to use other
location such as
* /var/www/sqrlrcrd.com for anything that should last */
Props.get("jetty.emb.tmpdir").foreach(dir =>
webctx.setTempDirectory(new File(dir)))
val albumResHndlr = new ResourceHandler()
albumResHndlr.setResourceBase(Props.get("album.dir","/tmp/album"))
// albumResHndlr.setDirectoriesListed(true)
val albumCtx = new ContextHandler()
albumCtx.setContextPath("/album")
/* didn't really need line below -aliases - after all, as
setResourceBase
pointed to the external dir I wanted */
albumCtx.setAliases(true)
albumCtx.setHandler(albumResHndlr)
val handlerList = new HandlerList()
handlerList.setHandlers(Array(albumCtx, webctx))
server.setHandler(handlerList)
server.start
server.join
On 21/09/12 16:44, Joakim Erdfelt wrote:
Since you are doing embedded work, you might want to take a look at
our embedded jetty examples.
https://github.com/eclipse/jetty.project/tree/master/example-jetty-embedded/src/main/java/org/eclipse/jetty/embedded
Of particular interest might be FileServer.java
Which uses ResourceHandler to serve files.
http://download.eclipse.org/jetty/stable-7/apidocs/org/eclipse/jetty/server/handler/ResourceHandler.html
Incidentally, we serve javadoc in the distribution with
ResourceHandler -- ${jetty.home}/contexts/javadoc.xml
https://github.com/eclipse/jetty.project/blob/master/jetty-distribution/src/main/resources/contexts/javadoc.xml
Also note that the WebAppContext.setDefaultsDescriptor() is how you
can configure to use the default servlet from a WebAppContext.
http://download.eclipse.org/jetty/stable-7/apidocs/org/eclipse/jetty/webapp/WebAppContext.html#setDefaultsDescriptor(java.lang.String)
<http://download.eclipse.org/jetty/stable-7/apidocs/org/eclipse/jetty/webapp/WebAppContext.html#setDefaultsDescriptor%28java.lang.String%29>
For an example of this usage, see the distribution again --
${jetty.home}/contexts/test.xml
https://github.com/eclipse/jetty.project/blob/master/test-jetty-webapp/src/main/config/contexts/test.xml
--
Joakim Erdfelt <[email protected] <mailto:[email protected]>>
www.webtide.com <http://www.webtide.com/>
Developer advice, services and support
from the Jetty & CometD experts.
On Fri, Sep 21, 2012 at 7:22 AM, Olek Swirski <[email protected]
<mailto:[email protected]>> wrote:
Hi,
I'm using embedded jetty instance to serve my Lift application
(Scala based web framework).
I use a runnable Start object with main method, which configures
embedded jetty and starts
the server. So the jar is executed like so: java -jar my-webapp.jar
My application uses a directory, where images are stored. It can
grow quite big and because
of that I don't want to include it and deploy together with my
runnable jar. So the ideal
thing to do for me is to use a symlink to some external dir
holding these pictures. However,
I have problem setting this up. When I was using standalone jetty
entry like this:
<servlet>
<servlet-name>default</servlet-name>
<servlet-class>org.eclipse.jetty.servlet.DefaultServlet</servlet-class>
<init-param>
<param-name>aliases</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
in etc/webdefault.xml was working fine. But in my embedded jetty
i'm not
using xml file config. Instead my setup is done in the main method
of executable
class, that runs the jar (please take a look below the messag to
see the code -
(it's in Scala but should be very easy to understand for java
devs). So, the thing is
I tried:
webctx.setAttribute("aliases", "true")
and also:
webctx.setInitParameter("aliases", "true")
but then, when restarted jetty, nothing really changed, and
aliases / symlinks
were not traversed by jetty. Instead I got 404s.
I was trying to set up a separate handler, and call
.setAliases(true) on it, but
then when I did:
server.setHandler(webctx)
server.setHandler(aliasedHandler)
server.start
server.join
the app wouldn't work even for non-aliased files. I understand,
probably this
was because of both handlers overlapping. But I'm not very
experienced with
jetty, so please let me know, how to make it work. So what should
I do to have
it work same way as with xml based
<param-name>aliases</param-name>
<param-value>true</param-value> ?
I did search for quite long time to find an answer for this, but
didn't find
anything that actually worked. Please share your knowledge on this
subject,
any hint will be greatly appreciated :) Here is my current Scala code
which unfortunately doesn't work with aliases / symlinks:
val port =
portFromCommandLine.getOrElse(Props.getInt("jetty.emb.port", 9090))
println("USING PORT: " + port)
val server = new Server(port)
val webctx = new WebAppContext
/* use embedded webapp dir as source of the web content
* web.xml is in default location, of embedded webapp dir,
* so don't need to adjust that */
val webappDirInsideJar =
webctx.getClass.getClassLoader.getResource("webapp").toExternalForm
webctx.setWar(webappDirInsideJar)
/* might use use external pre-existing webapp dir instead of
referencing
* the embedded webapp dir but it's not very useful. why would
we put
* webapp inside jar if we end up using some other external
webapp dir.
* I put it for reference, as it may make sense under some
circumstances.
* webctx.setResourceBase("/path/to/existing/webapp-dir") */
webctx.setContextPath("/")
webctx.setAttribute("aliases", "true")
/* optionally extract embedded webapp to specific temporary
location and serve
* from there. In fact /tmp is not a good place, because it
gets cleaned up from
* time to time so you need to specify some location such as
/var/www/sqrlrcrd.com <http://sqrlrcrd.com>
* for anything that should last */
val shouldExtract = Props.getBool("jetty.emb.extract", false)
if (shouldExtract) {
val webtmpdir = Props.get("jetty.emb.tmpdir", "/tmp")
webctx.setTempDirectory(new File(webtmpdir))
}
server.setHandler(webctx)
server.start
server.join
Here is this file at github, just I didn't put alias-enabling code
there, because
couldn't make it work so far:
https://github.com/oolekk/sqrlrcrd.com/blob/master/src/main/scala/bootstrap/liftweb/Start.scala
Also here is a thread on Lift mailing list, about packaging jetty
8 together with
lift web application to create runnable, self serving jar:
https://groups.google.com/forum/?fromgroups=#!topic/liftweb/uwwIA8FwmU8
<https://groups.google.com/forum/?fromgroups=#%21topic/liftweb/uwwIA8FwmU8>
Thank you in advance for your help.
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