Hi Claude
I think now I was able to get the code what you expected. And I just
basically added the template merging stuff to script engine code and
the flow went successfully ;-).
Here is how to deal with tools with the JSR 223 API.
ScriptEngineManager manager = new ScriptEngineManager();
manager.registerEngineName("velocity", new
VelocityScriptEngineFactory());
engine = manager.getEngineByName("velocity");
ScriptContext context = engine.getContext();
Properties properties = new Properties();
properties.put("resource.loader", "class");
properties.put("class.resource.loader.description", "Template Class
Loader");
properties.put("class.resource.loader.class",
"org.apache.velocity.runtime.resource.loader.
ClasspathResourceLoader");
CustomEvent event = new CustomEvent("MyEvent");
context.getBindings(ScriptContext.ENGINE_SCOPE).put("event", event);
context.setAttribute(VelocityScriptEngine.VELOCITY_PROPERTIES,
properties, ScriptContext.ENGINE_SCOPE);
Writer writer = new StringWriter();
context.setWriter(writer);
engine.eval("eventtool.vm");
System.out.println("####### Tools output #########\n"+writer);
On Wed, Aug 1, 2012 at 12:34 AM, Dishara Wijewardana <
ddwijeward...@gmail.com> wrote:
>
>
> On Mon, Jul 30, 2012 at 12:40 AM, Claude Brisson <cla...@renegat.net>wrote:
>
>> On Sun, 29 Jul 2012 23:57:22 +0530
>> Dishara Wijewardana <ddwijeward...@gmail.com> wrote:
>>
>> > On Sun, Jul 29, 2012 at 10:20 PM, Claude Brisson <cla...@renegat.net>
>> > wrote:
>> >
>> > > Pardon me if I'm all wrong with that, but I really thought that in
>> > > the context of the JSR 223 API, templates themselves were
>> > > considered as scripts.
>> > >
>> > > This API is a wrapper around a scripting engine, that evaluates
>> > > scripts, which in our case are Velocity templates.
>> >
>> > My question is how do we manage following methods . We need to pass a
>> > template instance or a wrapper of it in to JSR 223 ScriptEngine . How
>> > to achieve this without having extensive methods in ScriptEngine API?
>> >
>> > template.merge(context, writer);
>> > ve.getTemplate(vmTemplateFile);
>>
>> The Velocity context corresponds to the JSR 223 Bindings. Populating it
>> should not be a problem.
>>
>> The evaluation itself should gather the getTemplate() step and the
>> merge() step, or use one of the VelocityEngine.evaluate() method, this
>> is already what you did in VelocityScriptEngine.eval() method.
>
>
> I think now I understood what you really meant. Will provide the client
> code ASAP and also I think I have to change the engine.eval() method
> in JSR223 API.
>
>
>
>> So I
>> really don't understand why you would need other methods. But maybe I'm
>> still missing something...
>>
>> Oh, by the way, I still saw some method comments like the following one
>> in your code:
>> /**
>> * Added creation inside sync block to avoid creating two factories
>> from a engine by two parallel threads at the same time.
>> * Also the additional null check out from sync block is to avoid
>> every thread to get blocked inside it even there is an already created
>> factory. */
>>
>> so I recall you that such comments may be useful when reading the code,
>> but they should be inside the method, not as a javadoc comment. Javadoc
>> users don't care about such details. Could you please do something
>> about that?
>
>
> I thought I cleared all. Sorry for the inconvenience caused. Will clean
> them all and update.
>
Done.
>
>
>>
>>
>> Claude
>>
>>
>> >
>> > >
>> > > Claude
>> > >
>> > > On Sun, 29 Jul 2012 00:52:08 +0530
>> > > Dishara Wijewardana <ddwijeward...@gmail.com> wrote:
>> > >
>> > > > On Sat, Jul 28, 2012 at 12:53 PM, Claude Brisson
>> > > > <cla...@renegat.net> wrote:
>> > > >
>> > > > > On Sat, 28 Jul 2012 11:47:35 +0530
>> > > > > Dishara Wijewardana <ddwijeward...@gmail.com> wrote:
>> > > > >
>> > > > > > On Fri, Jul 27, 2012 at 2:20 PM, Claude Brisson
>> > > > > > <cla...@renegat.net> wrote:
>> > > > > >
>> > > > > > > Well, ok, but it's still not what I asked for: I meant a
>> > > > > > > command line tool that would, of course, use your JSR 223
>> > > > > > > API classes.
>> > > > > > >
>> > > > > > HI Claude,
>> > > > > > Sorry for the inconvenience I made. So what you meant is do
>> > > > > > the above similar kind of thing (a client code) which would
>> > > > > > not directly goes through the velocity API but through JSR223
>> > > > > > API ? If so in that case we would need to add additional
>> > > > > > methods to the JSR API ? IS that OK ? Is it what you
>> > > > > > expected ?
>> > > > >
>> > > > > Well, the API is meant to be used, and a command line wrapper
>> > > > > seems to me one of the simplest things we could do as an
>> > > > > example.
>> > > > >
>> > > > > Why would you need additional methods to the JSR 223 API? Which
>> > > > > methods?
>> > > > >
>> > > > JSR223 API doesn't have a concept like templates which is in
>> > > > velocity. Hence it does not have getTemplate() method. ( because
>> > > > I have simply to execute a similar example as given through jsr
>> > > > 223 API, need a getTemplate() )
>> > > >
>> > > > >
>> > > > >
>> > > > > Claude
>> > > > >
>> > > > > >
>> > > > > > > Claude
>> > > > > > >
>> > > > > > > On Fri, 27 Jul 2012 00:00:31 +0530
>> > > > > > > Dishara Wijewardana <ddwijeward...@gmail.com> wrote:
>> > > > > > >
>> > > > > > > > Hi Claude,
>> > > > > > > > I was finally able to got a simple code working :-) .
>> > > > > > > >
>> > > > > > > > public class Main {
>> > > > > > > >
>> > > > > > > > public static void main(String[] args) throws
>> > > > > > > > Exception { VelocityContext context = new
>> > > > > > > > VelocityContext(); Writer writer = new StringWriter();
>> > > > > > > >
>> > > > > > > > CustomEvent event = new CustomEvent("subash");
>> > > > > > > > context.put("event", event);
>> > > > > > > > Template template =
>> > > > > > > > createTemplate("eventtool.vm");
>> > > > > > > >
>> > > > > > > > template.merge(context, writer);
>> > > > > > > > System.out.println(writer);
>> > > > > > > > writer.close();
>> > > > > > > > }
>> > > > > > > >
>> > > > > > > > private static Template createTemplate(String
>> > > > > > > > vmTemplateFile) throws Exception {
>> > > > > > > > VelocityEngine ve = new VelocityEngine();
>> > > > > > > > Properties properties = new Properties();
>> > > > > > > > properties.put("resource.loader", "class");
>> > > > > > > >
>> > > properties.put("class.resource.loader.description","Template
>> > > > > > > > Class Loader");
>> > > > > > > > properties.put("class.resource.loader.class",
>> > > > > > > >
>> > > > > > > >
>> > > > >
>> "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
>> > > > > > > > ve.init(properties);
>> > > > > > > > return ve.getTemplate(vmTemplateFile);
>> > > > > > > > }
>> > > > > > > >
>> > > > > > > >
>> > > > > > >
>> > > > >
>> > >
>>
>> ---------------------------------------------------------------------------------------------------------------------------------
>> > > > > > > >
>> > > > > > > > And here is the template and the out put.
>> > > > > > > >
>> > > > > > > > *eventtool.vm*
>> > > > > > > >
>> > > > > > > > $event;
>> > > > > > > >
>> > > > > > > > Event Created by $event.getName()
>> > > > > > > > Event Created on $event.getDate()
>> > > > > > > >
>> > > > > > > >
>> > > > > > > > *Output*
>> > > > > > > > *
>> > > > > > > > *
>> > > > > > > > This is a test event template: created bysubash on Thu
>> > > > > > > > Jul 26 23:57:25 IST 2012;
>> > > > > > > >
>> > > > > > > > Event Created by subash
>> > > > > > > > Event Created on Thu Jul 26 23:57:25 IST 2012
>> > > > > > > >
>> > > > > > > >
>> > > > > > > >
>> > > > > > > > On Sun, Jul 22, 2012 at 4:54 PM, Claude Brisson
>> > > > > > > > <cla...@renegat.net> wrote:
>> > > > > > > >
>> > > > > > > > > > Did you mean Velocity maven plugin tool[1] as the
>> > > > > > > > > > command line tool ? If not can you please direct me
>> > > > > > > > > > to a link to find the example to follow. Because in
>> > > > > > > > > > the documentation page there are links to XML tool,
>> > > > > > > > > > View tool, JSP tool and etc. And couldn't find
>> > > > > > > > > > "command line tool" thing . Correct me if I am
>> > > > > > > > > > looking for irrelevant.
>> > > > > > > > > >
>> > > > > > > > > > [1] -
>> > > > > > > > > >
>> > > > > > > > >
>> > > > > > >
>> > > > >
>> > >
>> http://velocity.apache.org/tools/devel/maven-velocity-tools-plugin/index.html
>> > > > > > > > >
>> > > > > > > > > No, when I say "command line tool", I only mean a plain
>> > > > > > > > > old Java object with a "main(String args[])" method,
>> > > > > > > > > that you can call from the command line...
>> > > > > > > > >
>> > > > > > > > >
>> > > > > > > > > Claude
>> > > > > > > > >
>> > > > > > > >
>> > > > > > > >
>> > > > > > > >
>> > > > > > >
>> > > > > > >
>> > > > > >
>> > > > > >
>> > > > >
>> > > > >
>> > > >
>> > > >
>> > >
>> > >
>> >
>> >
>>
>>
>
>
> --
> Thanks
> /Dishara
>
>
--
Thanks
/Dishara
