Re: event framework question

The language does not currently allow you to have references to other bits
of the description to build up a reference. In the recognition that this
is a short-coming, I have in the past written an additional function "Ref"
which allows you to do this by turnning a string into a reference - I have
been intending to check it in, but have not yet done so. I will send you
the code once I have ported it to the latest version (I will also check it
in as part of the release).

The syntax ends up looking a little strange, but it does work..

Your example would look like

    foo extends Ref {
        lazy true;
	reference ("HOST " ++ installEnv:serverName
                  ++ ":" ++ installEnv:serverProcessName
                  ++ ":start");
    }

If this proves a commonly used feature, I can add more direct syntactic
support to make it look a little better - as an operator call asRef, for
example.

Patrick

>
> Hi Patrick,
>
> thanks a lot - now it works. As a follow up I have another question:
> I want to parameterize
>
> foo LAZY HOST host1.cern.ch:receive:start;
>
> I.e. I have a "base component" which looks like
>
> installEnv extends {
>
> serverName "host10.cern.ch";
> serverProcessName "server";
> }
>
> It gets included into the prevevious (below) mentionend components. Thus
> on the sender component I'd like to do something like:
>
> sendTo:foo LAZY HOST
> (installEnv:serverName):(installEnv:serverProcessName):start;
>
> This doesn't work... What would be the right syntax to do something like
> that ?
>
> Thanks again,
> Andreas
>
>
> On Tue, 21 Sep 2004 [email protected] wrote:
>
>>
>> Hi Andreas,
>>
>> The question to ask is what the component on host1 is called.
>>
>> Components are named in one of two ways:
>>   1) having an sfProcessComponentName attribute set
>>   2) using the name given on the sfStart command line (this one takes
>> precedence.
>>
>> Consequently, the top level component (the root - what was sfConfig in
>> the
>> description) is called receive, and it contains the start component. The
>> foo link should therefore read
>>
>>         foo LAZY HOST host1.cern.ch:receive:start;
>>
>> If you ever get this kind of issue, you can start the management console
>> pointing to, in this case, host1 to see what is named, and how.
>>
>> Patrick
>>
>>
>> >
>> > I have two components get deployed on 2 different machines. On
>> component
>> > is supposed to send a message to the other.
>> > Now I start sfDaemon on host1.cern.ch and host2.cern.ch (these are
>> > not the real hostnames... I changed them for privacy) First
>> > I deploy the receive component on host host1.cern.ch. In sfParse this
>> > component looks as follows:
>> >
>> > sfCodeBase "default";
>> > sfClass "org.smartfrog.sfcore.compound.CompoundImpl";
>> > start extends  {
>> > 	sfCodeBase "default";
>> > 	sfClass "ch.cern.openlab.smartfrog.pbs.PBSserverStart";
>> > 	sendTo extends LAZY ;
>> > 	registerWith extends LAZY ;
>> > 	verbose true;
>> > }
>> >
>> > I deploy this component with "sfStart host1.cern.ch receive
>> > pbsServerStart.sf" and it works fine. The second component looks as
>> > follows:
>> >
>> > sfCodeBase "default";
>> > sfClass "org.smartfrog.sfcore.compound.CompoundImpl";
>> > send extends  {
>> > 	sfCodeBase "default";
>> > 	sfClass "ch.cern.openlab.smartfrog.pbs.PBSnodeStart";
>> > 	sendTo extends LAZY  {
>> > 		foo LAZY HOST host1.cern.ch:start;
>> > 	}
>> > 	registerWith extends LAZY ;
>> > }
>> >
>> > When I deploy this component on host2.cern.ch with "sfStart
>> > host2.cern.ch send test.sf" I get
>> >
>> > SmartFrog 3.04.004_beta
>> > (C) Copyright 1998-2004 Hewlett-Packard Development Company, LP
>> >  - FAILED when trying DEPLOY of 'send',  [test.sf],
>> > host:host2.cern.ch
>> >    Error:
>> >     SmartFrogLifecycleException:: sfDeploy: HOST
>> > host2.cern.ch:rootProcess:send:send
>> >     cause: SmartFrogResolutionException::
>> java.net.UnknownHostException:
>> > host1.cern.ch:start
>> >        source: HOST host2.cern.ch:rootProcess:send:send
>> >        path(45)
>> >     data: Failed object class:
>> ch.cern.openlab.smartfrog.pbs.PBSnodeStart
>> >     Command line SFACT: 'send:DEPLOY:test.sf::host2.cern.ch:'
>> >     To String: ' name:send,  type:DEPLOY,  url:test.sf,
>> > host:host2.cern.ch,  resultType:FAILED,
>> > resultExceptionMessage:sfDeploy: HOST
>> > host2.cern.ch:rootProcess:send:send'
>> >
>> > It seems to me that the line
>> >
>> > sendTo extends LAZY  {
>> >                 foo LAZY HOST host1.cern.ch:start;
>> >         }
>> >
>> > gives not the right reference ... (on host2.cern.ch "ping
>> host1.cern.ch"
>> > works). What could be the reason for my problem ?
>> >
>> > Thanks a lot,
>> > Andreas
>> >
>




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