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Posted to user@tuscany.apache.org by Joni Lee <we...@yahoo.com> on 2012/06/21 23:31:39 UTC
Java & Python in distributed nodes
Hi all,
I'm very fascinated with the distributed components of SCA, whereby different components running on different machines. For the first try, i want to call python component from a Java component. Both on different nodes and start them on local machine.
For this I extend the project samples/calculator-distributed by adding a python component to a node B as follows
// Add a Python component in src/main/resources/nodeB/Calculator.composite
<component name="HelloServiceComponent">
<tuscany:implementation.script script="calculator/HelloServiceImpl.py"/>
<service name="HelloService">
<interface.java interface="calculator.HelloService" />
</service>
</component>
the script HelloServiceImpl.py is put in the same directory of the composite of node B (src/main/resources/nodeB)
the Java interface is put in src/main/java/calculator/HelloService.java
But I cannot start the node
21-Jun-2012 17:16:42 org.apache.tuscany.sca.implementation.node.builder.impl.NodeCompositeBuilderImpl
WARNING: Service not found for component service: Component = HelloServiceComponent Service = HelloService
21-Jun-2012 17:16:42 org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
SEVERE: HTTP Server Error : java.lang.ClassCastException: org.apache.tuscany.sca.assembly.impl.ComponentImpl cannot be cast to org.apache.tuscany.sca.runtime.RuntimeComponent
21-Jun-2012 17:16:42 org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
Any suggestions? Do I miss something important?
Thank you very much
Re: Java & Python in distributed nodes
Posted by Luciano Resende <lu...@gmail.com>.
On Fri, Jun 22, 2012 at 2:25 AM, Joni Lee <we...@yahoo.com> wrote:
> Hi Raymond,
>
> We are developing a cloud architecture here and first take a look at the
> distributed nodes of Tuscany.
>
> I use maven to run it, and it does not work, even with dependency
> tuscany-core
> what I did is simply extend your existing sample
> (samples/calculator-distributed) with a python component, instead of a java
> component in one node.
>
> Do I miss something important? Because I can build and run the original
> sample project without problems.
> thank you for your answers.
>
> ________________________________
> From: Raymond Feng <en...@gmail.com>
> To: user@tuscany.apache.org; Joni Lee <we...@yahoo.com>
> Sent: Thursday, June 21, 2012 11:40 PM
> Subject: Re: Java & Python in distributed nodes
>
> It seems that you are missing some dependencies such as tuscany-core on the
> classpath.
>
> Thanks,
> Raymond
> On Jun 21, 2012, at 2:31 PM, Joni Lee wrote:
>
> Hi all,
>
> I'm very fascinated with the distributed components of SCA, whereby
> different components running on different machines. For the first try, i
> want to call python component from a Java component. Both on different nodes
> and start them on local machine.
> For this I extend the project samples/calculator-distributed by adding a
> python component to a node B as follows
>
> // Add a Python component in
> src/main/resources/nodeB/Calculator.composite
>
> <component name="HelloServiceComponent">
> <tuscany:implementation.script
> script="calculator/HelloServiceImpl.py"/>
> <service name="HelloService">
> <interface.java interface="calculator.HelloService" />
> </service>
> </component>
>
> the script HelloServiceImpl.py is put in the same directory of the composite
> of node B (src/main/resources/nodeB)
> the Java interface is put in src/main/java/calculator/HelloService.java
>
> But I cannot start the node
>
> 21-Jun-2012 17:16:42
> org.apache.tuscany.sca.implementation.node.builder.impl.NodeCompositeBuilderImpl
> WARNING: Service not found for component service: Component =
> HelloServiceComponent Service = HelloService
> 21-Jun-2012 17:16:42
> org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
> SEVERE: HTTP Server Error : java.lang.ClassCastException:
> org.apache.tuscany.sca.assembly.impl.ComponentImpl cannot be cast to
> org.apache.tuscany.sca.runtime.RuntimeComponent
> 21-Jun-2012 17:16:42
> org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
>
> Any suggestions? Do I miss something important?
>
> Thank you very much
>
>
>
>
BTW, Are you using 1.x or 2.x ?
--
Luciano Resende
http://people.apache.org/~lresende
http://twitter.com/lresende1975
http://lresende.blogspot.com/
Re: Java & Python in distributed nodes
Posted by Joni Lee <we...@yahoo.com>.
Hi Raymond,
We are developing a cloud architecture here and first take a look at the distributed nodes of Tuscany.
I use maven to run it, and it does not work, even with dependency tuscany-core
what I did is simply extend your existing sample (samples/calculator-distributed) with a python component, instead of a java component in one node.
Do I miss something important? Because I can build and run the original sample project without problems.
thank you for your answers.
________________________________
From: Raymond Feng <en...@gmail.com>
To: user@tuscany.apache.org; Joni Lee <we...@yahoo.com>
Sent: Thursday, June 21, 2012 11:40 PM
Subject: Re: Java & Python in distributed nodes
It seems that you are missing some dependencies such as tuscany-core on the classpath.
Thanks,
Raymond
On Jun 21, 2012, at 2:31 PM, Joni Lee wrote:
Hi all,
>
>
>I'm very fascinated with the distributed components of SCA, whereby different components running on different machines. For the first try, i want to call python component from a Java component. Both on different nodes and start them on local machine.
>For this I extend the project samples/calculator-distributed by adding a python component to a node B as follows
>
>
> // Add a Python component in src/main/resources/nodeB/Calculator.composite
>
>
> <component name="HelloServiceComponent">
> <tuscany:implementation.script script="calculator/HelloServiceImpl.py"/>
> <service name="HelloService">
> <interface.java interface="calculator.HelloService" />
> </service>
> </component>
>
>
>the script HelloServiceImpl.py is put in the same directory of the composite of node B (src/main/resources/nodeB)
>the Java interface is put in src/main/java/calculator/HelloService.java
>
>
>But I cannot start the node
>
>
>21-Jun-2012 17:16:42 org.apache.tuscany.sca.implementation.node.builder.impl.NodeCompositeBuilderImpl
>WARNING: Service not found for component service: Component = HelloServiceComponent Service = HelloService
>21-Jun-2012 17:16:42 org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
>SEVERE: HTTP Server Error : java.lang.ClassCastException: org.apache.tuscany.sca.assembly.impl.ComponentImpl cannot be cast to org.apache.tuscany.sca.runtime.RuntimeComponent
>21-Jun-2012 17:16:42 org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
>
>
>Any suggestions? Do I miss something important?
>
>
>Thank you very much
Re: Java & Python in distributed nodes
Posted by Raymond Feng <en...@gmail.com>.
It seems that you are missing some dependencies such as tuscany-core on the classpath.
Thanks,
Raymond
On Jun 21, 2012, at 2:31 PM, Joni Lee wrote:
> Hi all,
>
> I'm very fascinated with the distributed components of SCA, whereby different components running on different machines. For the first try, i want to call python component from a Java component. Both on different nodes and start them on local machine.
> For this I extend the project samples/calculator-distributed by adding a python component to a node B as follows
>
> // Add a Python component in src/main/resources/nodeB/Calculator.composite
>
> <component name="HelloServiceComponent">
> <tuscany:implementation.script script="calculator/HelloServiceImpl.py"/>
> <service name="HelloService">
> <interface.java interface="calculator.HelloService" />
> </service>
> </component>
>
> the script HelloServiceImpl.py is put in the same directory of the composite of node B (src/main/resources/nodeB)
> the Java interface is put in src/main/java/calculator/HelloService.java
>
> But I cannot start the node
>
> 21-Jun-2012 17:16:42 org.apache.tuscany.sca.implementation.node.builder.impl.NodeCompositeBuilderImpl
> WARNING: Service not found for component service: Component = HelloServiceComponent Service = HelloService
> 21-Jun-2012 17:16:42 org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
> SEVERE: HTTP Server Error : java.lang.ClassCastException: org.apache.tuscany.sca.assembly.impl.ComponentImpl cannot be cast to org.apache.tuscany.sca.runtime.RuntimeComponent
> 21-Jun-2012 17:16:42 org.apache.tuscany.sca.assembly.xml.CompositeDocumentProcessor
>
> Any suggestions? Do I miss something important?
>
> Thank you very much