brooklyn-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Sam Corbett <>
Subject Re: Startable entity does not get "on fire" if exception is thrown within start()
Date Mon, 20 Jul 2015 18:12:51 GMT
Hi Michael,

Question 1:

I agree with you that this behaviour is surprising.

I'm going to guess that you are using BasicStartableImpl. Its
implementation of `start` should be modified to follow the same pattern as
entities that extend `brooklyn.entity.basic.SoftwareProcess`, which defers
to a class called MachineLifecycleEffectorTasks. This class' `start` method
transitions through "starting" and "started" states. If an exception is
thrown it sets the entity "on fire" and before propagating the exception.

See this link for the implementation:

Question 2:

To set the state of an entity you should follow pattern shown in the link
above. For example, to have an entity set itself "on fire":

        ServiceStateLogic.setExpectedState(this, Lifecycle.ON_FIRE);

The value of using this indirection (rather than directly calling
`entity.setAttribute(Attributes.SERVICE_STATE_ACTUAL, Lifecycle.ON_FIRE)`)
is that it will track metadata around state transitions like the date and
time they occur.

I will look at updating BasicStartableImpl.

I hope this helps,


On 2 July 2015 at 15:40, Michael Schneider <> wrote:

> Hi!
> I have a Startable entity. I have found that if an exception is thrown
> within the start() method, the entity still gets green at the end.
> Question 1: Is this intended behavior, and if so, why?
> Question 2: What options do I have to force the entity into state "on
> fire" if any unhandled exception is thrown in start()?
> Regards,
> Michael
> Michael Schneider
> Senior Software Engineer
> Virtustream Inc.
> 6 Concourse Parkway | Suite 1930 | Atlanta | GA 30328
> Cell: +49 (176) 24102310
> |<>
> Keep up with Virtustream:
> Blog<> * Twitter<
>> * LinkedIn<
>> * Slideshare<
>> * YouTube<
> The information contained in this electronic mail transmission may be
> privileged and confidential, and therefore, protected from disclosure. If
> you have received this communication in error, please notify us immediately
> by replying to this message and deleting the email and its attachments from
> all computers without copying or disclosing it.

Cloudsoft Corporation Limited, Registered in Scotland No: SC349230. 
 Registered Office: 13 Dryden Place, Edinburgh, EH9 1RP
This e-mail message is confidential and for use by the addressee only. If 
the message is received by anyone other than the addressee, please return 
the message to the sender by replying to it and then delete the message 
from your computer. Internet e-mails are not necessarily secure. Cloudsoft 
Corporation Limited does not accept responsibility for changes made to this 
message after it was sent.

Whilst all reasonable care has been taken to avoid the transmission of 
viruses, it is the responsibility of the recipient to ensure that the 
onward transmission, opening or use of this message and any attachments 
will not adversely affect its systems or data. No responsibility is 
accepted by Cloudsoft Corporation Limited in this regard and the recipient 
should carry out such virus and other checks as it considers appropriate.

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message