Actually this was an excellent suggestion by Eric Hubert [1], and I'm
sure many users will find these enhancements extremely useful.. Like the
JIRA says, I'm at fault for not yet updating the docs and samples..
Actually there is quite a lot of documentation around these changes,
from feature/behavior to management and monitoring via JMX.. I will
document this as soon as I can..
asankha
[1] https://issues.apache.org/jira/browse/SYNAPSE-466
indika kumara wrote:
Ruwan
I just did a part of it . Asankha did the major part
thanks
Indika
On Wed, Nov 12, 2008 at 6:11 PM, Ruwan Linton <[EMAIL PROTECTED]> wrote:
Indika,
This explains all of it, and you should have send this explanation earlier
once you did the changes :-) I was trying to figure out the value addition
of the changes and now it is very clear.
Thanks for the explanation.
Thanks,
Ruwan
On Wed, Nov 12, 2008 at 5:50 PM, indika kumara <[EMAIL PROTECTED]>
wrote:
Hi Hiranya
First thing, now endpoint can be at four states. Previously, only
there were two states. I can't draw state diagram and just try to
describe how state transition works.
Following are the four states
[1] Active - I think, word is self descriptive
[2] TimeOut - With new endpoint enhancements, there is a feature that
you can retry on failure of endpoint invocation. This behavior can be
configured at endpoint level through synapse endpoint API.
You can configure what are the error codes that should retry, retry
delay, number of retry, etc... Configuration section is called
'markForSuspension'. If any errors (not only for timeout) that have
been defined within ''markForSuspension' is occurred and if it is need
to retry (positive retry count), endpoint is moved to 'TimeOut' State
…Of course, name is not self descriptive. Endpoint in this state is
moved to 'Suspended" state, if endpoint invocation will not be
successful even in retries. If any retry got success, endpoint is
moved to 'Active' state.
[3] Suspended – There is a new configuration section, called
'suspendOnFailure' where defines error codes and some other
parameters. If any of these errors is occurred during endpoint
invocation, it is moved in to 'Suspended' state. It can only be active
after, suspended duration is over.
[4] Switch off - This is state endpoint is moved to maintenance.
State change between any states to 'Switch off' only can be through
manually through JMX based API we have provided. Endpoint which is in
'Switch off' state can only be moved to 'Active' state and it too can
only be done through JMX.
Now there is no method for 'isActive' …But there is a one
readyToSend() that can be used for that. For a leaf endpoint, it
returns true, if it is in active state or timeout state with remaining
reties. For node endpoint, it is deepened on type of endpoint.
There is no method called 'setActive' as we have multiple states. You
can change states ... please Look at 'AddressEndpoint' and
'EndpointContext .
API may not reflect these. I may nice to move state change API into
extended life cycle management interface –Endpoint Lifecycle
Management and accessing separate behavior through separate API (Like
JDK I/O 'Closable' interface) and separate leaf and node endpoint
functionality into separate interface and base classes.
I have't look at Dynamic Endpoint code ...
BTW, Following shows a snapshot of a new endpoint configuration. To
get know about meaning of error code please refer SynapseConstants
class
<syn:endpoint name="one">
<syn:address uri="some loaction">
<syn:suspendOnFailure>
<syn:initialDuration>5</syn:initialDuration>
<syn:progressionFactor>1.0</syn:progressionFactor>
<syn:maximumDuration>10000</syn:maximumDuration>
</syn:suspendOnFailure>
<syn:markForSuspension>
<syn:errorCodes>101504,101505</syn:errorCodes>
<syn:retriesBeforeSuspension>5</syn:retriesBeforeSuspension>
<syn:retryDelay>10</syn:retryDelay>
</syn:markForSuspension>
</syn:address>
</syn:endpoint>
Thanks
Indika
On Wed, Nov 12, 2008 at 3:23 PM, Hiranya Jayathilaka
<[EMAIL PROTECTED]> wrote:
Hi Folks,
I'm attempting to rectify the issues in the dynamic load balance code.
When
going through the commit history I noticed that some of the methods in
the
Endpoint interface have been removed recently. For example methods like
isActive and setActive are no longer available in the Endpoint
interface. I
believe these are required by the dynamic load balance code. Were they
removed intentionally? If yes where is this functionality now?
Thanks
Best Regards,
Hiranya
--
Asankha C. Perera
http://adroitlogic.org
http://esbmagic.blogspot.com
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