Railo on Google Apps Engine

[Katsuyuki Sakai]

Hi there,

Is it possible to run Railo on Google Apps Engine?
GAE recently supports JRE6, so I just want to know the possibility.
http://code.google.com/intl/en-US/appengine/docs/java/runtime.html

GAE applies several restrictions to their Java environment.
For example, you cannot create java.lang.Thread, so if Railo uses
Thread in servlet start up phase, it's not possible to run Railo.

Thanks,
Katz

[Peter Amiri]

This would be extremely cool if it worked. I am reading the docs to
see if we can just use the railo war file to get started. If I get a
chance to try this out, I'll post my results to the list.

-Peter

[Mark Drew]

So far I dont think you can, there are restrictions on reading (and
writing?) to the WEB-INF folder so it breaks..

I did deploy a simple app but it doesn't run because you get the
following error:

failed AMFServlet
javax.servlet.ServletException: access denied (java.io.FilePermission /
base/data/home/apps/railo-demo/1.332672585908457473/WEB-INF/lib/railo-
server write)
at
org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:
437)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:
256)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
at
org
.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
612)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:
1218)
at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:
500)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:
448)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
at
com
.google
.apphosting
.runtime
.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:190)
at
com
.google
.apphosting
.runtime
.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:167)
at
com
.google
.apphosting
.runtime
.jetty
.JettyServletEngineAdapter
.serviceRequest(JettyServletEngineAdapter.java:113)
at
com
.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:
235)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:4547)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:4545)
at
com
.google
.net
.rpc
.impl
.BlockingApplicationHandler
.handleRequest(BlockingApplicationHandler.java:24)
at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
359)
at com.google.net.rpc.impl.Server$2.run(Server.java:792)
at
com
.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:
56)
at
com
.google
.tracing
.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:
489)
at com.google.net.rpc.impl.Server.startRpc(Server.java:748)
at com.google.net.rpc.impl.Server.processRequest(Server.java:340)
at
com
.google
.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:
422)
at
com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:
319)
at
com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:
290)
at com.google.net.async.Connection.handleReadEvent(Connection.java:419)
at
com
.google
.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:
733)
at
com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:
207)
at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101)
at
com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:
249)
at com.google.apphosting.runtime.JavaRuntime
$RpcRunnable.run(JavaRuntime.java:373)
at java.lang.Thread.run(Unknown Source)


MD

Mark Drew
CEO
Railo Technologies UK
mark...@getrailo.com
http://www.getrailo.com

[Tim Nelson]

The restriction is on writing to the file system. GAE does not allow this. They do allow writing to a log, though.

I see 2 roadblocks; writing to the log files and compiling the cf code. The first could be changed to use the GAE logging feature. And the second could be handled by pre-compiling the cf code.

Are there any other places Railo writes to the file system. The admin config?

I know Railo supports pre-compiled cf code, but I can't find anywhere that explains how to do this.

Another restriction is the use of threads. GAE does not allow spawning of new Threads or ThreadGroups. I assume if you don't use cfthread, this wouldn't be a problem. Is that true?

[Tim Nelson]

I just found the Railo blog article on creating an archive (pre-
compiled cf).

[Randy]

Any luck trying to get a pre-compiled application up and running on
the App Engine?

[Tim Nelson]

No. Railo tries to write to the log file and GAE doesn't allow that. I may try to modify Railo to use the logger that they do allow, but I'm sure if there's other areas that would also need changing.

[Gert Franz]

Well you can configure the loggers to write to the RAM resource. Just modify the corresponding log entries. Have a look at this:

 

http://www.railo.ch/blog/index.cfm/2007/7/26/Railo-Readonly--Start-Railo-from-a-CD

 

Greetings from Switzerland

Gert Franz

Railo Technologies GmbH

gert....@getrailo.com

www.getrailo.ch

 

Join our Mailing List

german:              http://de.groups.yahoo.com/group/railo/

english:                http://groups.google.com/group/railo

linked in:             http://www.linkedin.com/e/gis/71368/0CF7D323BBC1

Bug tracker:       http://jira.jboss.org/jira/browse/RAILO

Railo Blog:     http://www.railo-technologies.com/blog

[Ryan Letulle]

Very cool.

On Tue, Apr 14, 2009 at 1:36 PM, Gert Franz <gert....@railo.ch> wrote:

Well you can configure the loggers to write to the RAM resource. Just modify the corresponding log entries. Have a look at this:

 

http://www.railo.ch/blog/index.cfm/2007/7/26/Railo-Readonly--Start-Railo-from-a-CD

 

Greetings from Switzerland

Gert Franz

Railo Technologies GmbH

gert....@getrailo.com

www.getrailo.ch

 

Join our Mailing List

german:              http://de.groups.yahoo.com/group/railo/

english:                http://groups.google.com/group/railo

linked in:             http://www.linkedin.com/e/gis/71368/0CF7D323BBC1

Bug tracker:       http://jira.jboss.org/jira/browse/RAILO

Railo Blog:     http://www.railo-technologies.com/blog

 

Von: ra...@googlegroups.com [mailto:ra...@googlegroups.com] Im Auftrag von Tim Nelson
Gesendet: Dienstag, 14. April 2009 18:18
An: ra...@googlegroups.com
Betreff: [railo] Re: Railo on Google Apps Engine

 

No. Railo tries to write to the log file and GAE doesn't allow that. I may try to modify Railo to use the logger that they do allow, but I'm sure if there's other areas that would also need changing.

 

--
Ryan

[Tim Nelson]

That sounds promising Gert, but it's actually crashing trying to execute java.io.File.exists on Application.cfc. Not sure why this is, the GAE docs say that you can read any file in your directory. I have found some others having issues reading files as well, but nobody seems to have an answer.

[Gert Franz]

Do you have a stacktrace for us?

 

Gert

 

Von: ra...@googlegroups.com [mailto:ra...@googlegroups.com] Im Auftrag von Tim Nelson
Gesendet: Dienstag, 14. April 2009 22:13
An: ra...@googlegroups.com
Betreff: [railo] Re: Railo on Google Apps Engine

 

That sounds promising Gert, but it's actually crashing trying to execute java.io.File.exists on Application.cfc. Not sure why this is, the GAE docs say that you can read any file in your directory. I have found some others having issues reading files as well, but nobody seems to have an answer.

[Tim Nelson]

access denied (java.io.FilePermission D:\opt\appengine-java-sdk-1.2.0\demos\gaer

ailotest\Application.cfc read)

        at java.security.AccessControlContext.checkPermission(Unknown Source):-1

        at java.security.AccessController.checkPermission(Unknown Source):-1

        at java.lang.SecurityManager.checkPermission(Unknown Source):-1

        at com.google.appengine.tools.development.DevAppServerFactory$CustomSecu

rityManager.checkPermission(DevAppServerFactory.java:76):76

        at java.lang.SecurityManager.checkRead(Unknown Source):-1

        at java.io.File.exists(Unknown Source):-1

        at java.io.Win32FileSystem.canonicalize(Unknown Source):-1

        at java.io.File.getCanonicalPath(Unknown Source):-1

        at railo.commons.io.res.type.file.FileResource.getCanonicalResource(File

Resource.java:79):79

        at railo.commons.io.res.util.ResourceUtil.getCanonicalResourceEL(Resourc

eUtil.java:566):566

        at railo.commons.io.res.util.ResourceUtil.toExactResource(ResourceUtil.j

ava:220):220

        at railo.runtime.PageSourceImpl.getPhyscalFile(PageSourceImpl.java:277):

277

        at railo.runtime.PageSourceImpl.physcalExists(PageSourceImpl.java:527):5

27

        at railo.runtime.PageSourceImpl.exists(PageSourceImpl.java:519):519

        at railo.runtime.listener.AppListenerUtil.getApplicationPageSourceCurr2R

oot(AppListenerUtil.java:92):92

        at railo.runtime.listener.AppListenerUtil.getApplicationPageSource(AppLi

stenerUtil.java:64):64

        at railo.runtime.listener.MixedAppListener.onRequest(MixedAppListener.ja

va:21):21

Tue Apr 14 15:31:18 CDT 2009-531 Release: (1)

        at railo.runtime.PageContextImpl.execute(PageContextImpl.java:1638):1638

        at railo.runtime.engine.CFMLEngineImpl.serviceCFML(CFMLEngineImpl.java:2

35):235

        at railo.loader.servlet.CFMLServlet.service(CFMLServlet.java:32):32

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:806):806

        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487

):487

        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet

Handler.java:1093):1093

        at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter

(TransactionCleanupFilter.java:43):43

        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet

Handler.java:1084):1084

        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:3

60):360

        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.jav

a:216):216

        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:1

81):181

        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:7

12):712

        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

:405

        at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(De

vAppEngineWebAppContext.java:54):54

        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:1

39):139

        at com.google.appengine.tools.development.JettyContainerService$ApiProxy

Handler.handle(JettyContainerService.java:306):306

        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:1

39):139

        at org.mortbay.jetty.Server.handle(Server.java:313):313

        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:50

6):506

        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpCo

nnection.java:830):830

        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514):514

        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211):211

        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381):381

        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.ja

va:396):396

        at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool

.java:442):442

        at railo.runtime.op.Caster.toPageException(Caster.java:2908):2908

        at railo.runtime.PageContextImpl.execute(PageContextImpl.java:1641):1641

        at railo.runtime.engine.CFMLEngineImpl.serviceCFML(CFMLEngineImpl.java:2

35):235

        at railo.loader.servlet.CFMLServlet.service(CFMLServlet.java:32):32

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:806):806

        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487

):487

        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet

Handler.java:1093):1093

        at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter

(TransactionCleanupFilter.java:43):43

        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet

Handler.java:1084):1084

        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:3

60):360

        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.jav

a:216):216

        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:1

81):181

        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:7

12):712

        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

:405

        at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(De

vAppEngineWebAppContext.java:54):54

        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:1

39):139

        at com.google.appengine.tools.development.JettyContainerService$ApiProxy

Handler.handle(JettyContainerService.java:306):306

        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:1

39):139

        at org.mortbay.jetty.Server.handle(Server.java:313):313

        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:50

6):506

        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpCo

nnection.java:830):830

        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514):514

        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211):211

        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381):381

        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.ja

va:396):396

        at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool

.java:442):442

[Andrea Campolonghi]

Gert,

 

I do nto have really a lot of time but I would be glad to help.

 

Andrea

 

Da: ra...@googlegroups.com [mailto:ra...@googlegroups.com] Per conto di Gert Franz
Inviato: martedì 14 aprile 2009 22.25
A: ra...@googlegroups.com
Oggetto: AW: [railo] Re: Railo on Google Apps Engine

[Tim Nelson]

I decided to try this in production and it doesn't throw this same
error. I updated the log files and temp directory to use ram, but it
crashes on railo.commons.io.SystemUtil.isFSCaseSensitive() because it
calls java.io.createTempFile(), which is not allowed. I changed that
function and tried building the railo source files, but I was
unsuccessful. They compiled, but I couldn't get them exported to a
jar. There appears to be some overlap in the 2 source trees. I think I
will wait until you publish a build procedure to continue with this.

[Baz]

Are there plans to make Railo GAE ready?

[Sean Corfield]

On Sat, May 30, 2009 at 3:04 PM, Baz <thin...@gmail.com> wrote:
> Are there plans to make Railo GAE ready?

Not at this time. We've discussed the issue internally and feel that
GAE is too restrictive to make the effort worthwhile and for now we'll
point people at the special version of the Open BlueDragon which has
been created for GAE (and which has a lot of features changed /
disabled to make it run in that environment).
--
Sean A Corfield -- (904) 302-SEAN
Railo Technologies US -- http://getrailo.com/
An Architect's View -- http://corfield.org/

"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood