Re: [jira] [Commented] (BROOKLYN-454) DSL config evaluation fails for inherited entity

[Alex Heneveld]

I think you can say
$brooklyn:entity(config("entity")).attributeWhenReady("sensor") - is that
good enough (and notify this in the docs)?


On 16 Mar 2017 15:03, "Aled Sage (JIRA)" <j...@apache.org> wrote:


    [ https://issues.apache.org/jira/browse/BROOKLYN-454?page=
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Aled Sage commented on BROOKLYN-454:
------------------------------------

This is not related to inherited config. I think a better name would be
something like:
{noformat}
can't chain `$brooklyn:config("entity")` with subsequent DSL expressions
{noformat}

Try this blueprint:
{noformat}
location: localhost
services:
- type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
  brooklyn.parameters:
  - name: root.entity
    type: org.apache.brooklyn.api.entity.Entity
  brooklyn.config:
    root.entity: $brooklyn:self()
    launch.command: echo Launching
    checkRunning.command: echo CheckRunning
    stop.command: echo Stopping
    launch.latch: $brooklyn:config("root.entity").attributeWhenReady("
mysensor")
{noformat}

It fails to even deploy, giving back the error:
{noformat}
Error launching blueprint: Error resolving $brooklyn:config("root.entity"
).attributeWhenReady([mysensor]), in org.apache.brooklyn.util.core.
task.BasicExecutionContext@5c3c0b8f([Wrapped[contextEntity:
VanillaSoftwareProcessImpl{id=ir7jenazjs}],
LocalManagementContext[Aa5aJoCe-Tm6SWtZJ]]):
Error resolving $brooklyn:entity(org.apache.brooklyn.camp.brooklyn.spi.
dsl.methods.BrooklynDslCommon$DslFacades$EntitySupplier@
3489e896).attributeWhenReady("mysensor"), in org.apache.brooklyn.util.core.
task.BasicExecutionContext@5c3c0b8f([Wrapped[contextEntity:
VanillaSoftwareProcessImpl{id=ir7jenazjs}],
LocalManagementContext[Aa5aJoCe-Tm6SWtZJ]]):
component-id blank, from org.apache.brooklyn.camp.brooklyn.spi.dsl.methods.
BrooklynDslCommon$DslFacades$EntitySupplier@3489e896
{noformat}

I think the problem is the DSL parsing doesn't understand that
{{$brooklyn:config("root.entity")}} will return an entity, so it gives an
error.

In contrast, the blueprint below does deploy:
{noformat}
location: localhost
services:
- type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
  brooklyn.config:
    launch.command: echo Launching
    checkRunning.command: echo CheckRunning
    stop.command: echo Stopping
    launch.latch: $brooklyn:self().attributeWhenReady("mysensor")
{noformat}

> DSL config evaluation fails for inherited entity
> ------------------------------------------------
>
>                 Key: BROOKLYN-454
>                 URL: https://issues.apache.org/jira/browse/BROOKLYN-454
>             Project: Brooklyn
>          Issue Type: Bug
>         Environment: Brooklyn 0.11.0-SNAPSHOT
>            Reporter: Duncan Godwin
>
> Brooklyn seems to evaluate {{$brooklyn:config}} correctly in a latch when
inheriting the value from a parent. The following used to work in Apache
Brooklyn 0.10.0 but no longer does:
> {code}
> location: localhost
> services:
> - type: org.apache.brooklyn.entity.stock.BasicApplication
>   name: my-parent
>   brooklyn.config:
>     root.entity: $brooklyn:self()
>   brooklyn.children:
>   - type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
>     name: my-child
>     brooklyn.config:
>       launch.command: echo Launching
>       checkRunning.command: echo CheckRunning
>       stop.command: echo Stopping
>       launch.latch: $brooklyn:config("root.entity").attributeWhenReady("
sensorInParent")
> {code}
> The following does work:
> {code}
> location: localhost
> services:
> - type: org.apache.brooklyn.entity.stock.BasicApplication
>   name: my-parent
>   brooklyn.config:
>     root.entity: $brooklyn:self()
>   brooklyn.children:
>   - type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
>     name: my-child
>     brooklyn.initializers:
>     - type: org.apache.brooklyn.core.sensor.StaticSensor
>       brooklyn.config:
>         name: root.entity
>         targetType: org.apache.brooklyn.api.entity.Entity
>         static.value: $brooklyn:config("root.entity")
>     brooklyn.config:
>       launch.command: echo Launching
>       checkRunning.command: echo CheckRunning
>       stop.command: echo Stopping
>       launch.latch: $brooklyn:attributeWhenReady("root.entity").
attributeWhenReady("sensorInParent")
> {code}



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