Difference between revisions of "Operation"

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{{GVESB}} uses the element ''Operation'' to define an operational workflow.
 
{{GVESB}} uses the element ''Operation'' to define an operational workflow.
  
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Each workflow is identified by a triple <[[service]], [[client]], operation> and it is made instantiating a [[Flow]], with VCL operations ({{GVESB}} [[plugins]]) of one or more participating systems ([[Participant]] selected from those defined in the [[System|Systems]]).
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Each workflow is identified by a triple <[[service]], [[client]], [[operation]]> and it is made instantiating a [[Flow]], with VCL operations ({{GVESB}} [[plugins]]) of one or more participating systems ([[Participant]] selected from those defined in the [[System|Systems]]).
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=={{VULCON}} / {{GVCONSOLE}} Configuration==
 
=={{VULCON}} / {{GVCONSOLE}} Configuration==
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* GetRequest
 
* GetRequest
 
* Request
 
* Request
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* RequestReply : is one of the basic methods system use to talk to each other. When using request-response, the first system requests some data and the second computer responds to the request. Usually there is a series of such interchanges until the complete message is sent
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* RequestReply
 
* SendReply
 
* SendReply
  
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You can enable some consistency check on the data passed on {{GVESB}}.
 
You can enable some consistency check on the data passed on {{GVESB}}.
  
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The Operation Element is used by [[Client]] and its attributes are:
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The Operation Element is used by [[Service]] and its attributes are:
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* ''type'': operation.
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{|class="gvtable"
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* ''name'': Operation's name. Corresponds to a {{GVESB}} communication primitive or a forward. <br/> In the case of a forward, then you must also specify the parameter ''forward-name''. The attribute's admitted values are:
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! Attribute !! Type !! Description
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** RequestReply:
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|-
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** Request
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| class || fixed || This attributes must assume the value '''it.greenvulcano.gvesb.core.flow.GVFlowWF'''
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** GetReply
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|-
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** GetRequest
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| type || fixed || This attributes must assume the value '''operation'''
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** SendReply
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|-
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** Forward
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| name || required || Operation's name. Corresponds to a {{GVESB}} communication primitive or a forward.
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* ''forward-name'': Forward's name. Must be specified only if you are setting up a workflow for a forward.
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* ''out-check-type'': Enable a consistency check of GVBuffer. It can take three values:
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The attribute's admitted values are:
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** none: does not make any check.
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- RequestReply
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** sys-svc: fields [[system]] and [[service]] the result should take the same values in the input buffer.
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- Request
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** sys-svc-id: fields [[system]], [[service]] and ''id'' of the result must assume the same values that assumed in the input
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- GetReply
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buffer. <br/> This setting should not be used in transactions with semantics ''GetRequest''. The attribute's admitted values are:
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- GetRequest
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* ''operation-activation'': Activation status of the current [[system]]/[[service]] operation. The state can take two values:
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- SendReply
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** on: the operation is active. Default value.
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- Forward
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** off: the operation is not active.
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|-
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| forward-name || optional || Forward's name. Must be specified only if you are setting up a workflow for a forward.
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|-
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| out-check-type || required || Enable a consistency check of GVBuffer. It can take one of three values:
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- none: does not make any check.
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- sys-svc: fields [[system]] and [[service]] the result should take the same values in the input buffer.
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- sys-svc-id: fields [[system]], [[service]] and ''id'' of the result must assume the same values that assumed in the input buffer.<br/>This setting should not be used in operations with semantics ''GetRequest''.
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|-
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| operation-activation || required || Activation status of the current [[system]]/[[service]] operation. The state can take two values:
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- on: the operation is active. Default value.
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- off: the operation is not active.
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|}
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''Operation'' has the following subelements:
 
''Operation'' has the following subelements:
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* [[Flow]]
 
* [[Flow]]
 
* [[SubFlow]]
 
* [[SubFlow]]
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* [[conditions]]
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* [[Conditions]]
 
* OperationManagement
 
* OperationManagement
  

Latest revision as of 09:26, 13 May 2014

Description

GreenVulcano® ESB uses the element Operation to define an operational workflow.

Each workflow is identified by a triple <service, client, operation> and it is made instantiating a Flow, with VCL operations (GreenVulcano® ESB plugins) of one or more participating systems (Participant selected from those defined in the Systems).

VulCon / GV Console Configuration

GreenVulcano® ESB allows you to configure the following operations:

  • Forward
  • GetReply
  • GetRequest
  • Request
  • RequestReply
  • SendReply

And correspond (apart from the Forward) to the communication primitives of GreenVulcano® ESB.

The Forward workflows are driven by the internal mechanisms of GreenVulcano® ESB to complete transactions that do not require assistance from external systems.

You can enable some consistency check on the data passed on GreenVulcano® ESB.

The Operation Element is used by Service and its attributes are:

Attribute Type Description
class fixed This attributes must assume the value it.greenvulcano.gvesb.core.flow.GVFlowWF
type fixed This attributes must assume the value operation
name required Operation's name. Corresponds to a GreenVulcano® ESB communication primitive or a forward.

The attribute's admitted values are: 

- RequestReply
- Request
- GetReply
- GetRequest
- SendReply
- Forward
forward-name optional Forward's name. Must be specified only if you are setting up a workflow for a forward.
out-check-type required Enable a consistency check of GVBuffer. It can take one of three values: 
- none: does not make any check.
- sys-svc: fields system and service the result should take the same values in the input buffer.
- sys-svc-id: fields system, service and id of the result must assume the same values that assumed in the input buffer.
This setting should not be used in operations with semantics GetRequest.
operation-activation required Activation status of the current system/service operation. The state can take two values: 
- on: the operation is active. Default value.
- off: the operation is not active.


Operation has the following subelements:


OperationManagement

Use this element to define actions for performing on the domain against the following events:

  • FailureAction: useful to disable a component (ejb, mdb) against a configurable rate of errors.
  • EnableAction: useful to enable a component (ejb, mdb) against the enabling of the operation or service.
  • DisableAction: useful to disable a component (ejb, mdb) against the disabling of the operation or service.


It has the following subelements:

  • Description,
  • FailureAction with attributes:
    • component: Specifies the name of the component to disable.
    • max-failure-rate: Specifies the number of bankruptcies in the second for the given operation before disabling the component.
      The errors relate to a single server, and then consider that there are N servers in the cluster.
  • EnableAction with attribute:
    • component: Specifies the name of the component to enable.
  • DisableAction with its attribute:
    • component: Specifies the name of the component to disable.
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