Ws-call

Description

The GreenVulcano^® ESB plugin ws-call defines the parameters for calling a Web Service.

VulCon / GV Console Configuration

The ws-call Element is used by Channel and routed-call. Its attributes are:

Attribute	Type	Description
type	fixed	This attribute must assume the value call.
class	fixed	This attribute must assume the value it.greenvulcano.gvesb.virtual.ws.WSCallOperation.
name	required	Operation name. Used in the Flow section to associate workflow nodes to VCL operations.

and its subelements:

• Description
• AxisWebServiceInvoker
• Proxy

AxisWebServiceInvoker

This element is used by ws-call.

Its attributes are:

Attribute	Type	Description
type	fixed	This attribute must assume the value invoker.
class	fixed	This attribute must assume the value it.greenvulcano.gvesb.virtual.ws.GVWebServiceInvoker.
service	optional	Service name.
serviceNS	optional	Service NameSpace.
operation	required	Operation name.
portName	optional	Port Name
timeout	optional	Timeout in seconds.
ref-dp	optional	Name of Data Provider to use for preparing the request.
throwsFault	optional	If true throws Exception "Error invoking operation". If false returns the Fault response. Default to false. The attribute's admitted values are: true false
use-saaj	optional	Defines whether to use SAAJ to invoke the WebService mode instead of the default Axis2 mode. NOTE: If you choose to use SAAJ as a way of calling the WebService, Axis2 modules are not enabled. The attribute's admitted values are: true false
returnType	optional	Defines how to set the response data in the object field of output GVBuffer: context : the MessageContext. Default value envelope : the envelope as XML serialized as byte [] body : the body as XML serialized as byte [] body-element : the first child of body as XML serialized as byte [] header : the header as XML serialized as byte []

and has the subelements:

• Description
• XPathNamespace
• WSDLInfo
• EngageModule

XPathNamespace

Defines a namespace that can be used in XPath. The 'gvesb' prefix is reserved.

The following table shows the XPathNamespace element's attributes:

Attribute	Type	Description
prefix	required	Namespace prefix.
namespace	optional	Namespace. If not set, the prefix is associated to the default namespace. The attribute's value can't be null.

Might contain the sub-element Description.

WSDLInfo

This element returns a WSDL through his URL.

Its attributes are:

Attribute	Type	Description
type	fixed	This attribute must assume the value wsdlinfo.
wsdl	required	WSDL file URL.

EngageModule

Its attributes are:

Attribute	Type	Description
name	required	Defines the name of a module to hire to handle WS-*. If set, takes precedence over the attribute specifications. The attribute's admitted values are: rampart sandesha2
type	required	Defines the class that implements the hander for the module to engage. The attribute's admitted values are: it.greenvulcano.gvesb.virtual.ws.module.DefaultModuleHandler (Default value) . it.greenvulcano.gvesb.virtual.ws.module.rampart.RampartModuleHandler it.greenvulcano.gvesb.virtual.ws.module.sandesha2.Sandesha2ModuleHandler
specification	required	The specification to implement, mandatory and other than 'NO-SPEC' if the name attribute is not declared. The attribute's default value is: NO-SPEC. The attribute's admitted values are: NO-SPEC WS-Security WS-ReliableMessaging

It has the subelements:

• Description,
• PolicyData (see bellow),
• ModuleProperty (see bellow).

PolicyData

This element is an XML that describes the policies for a specific. Currently it is used only for the WS-Security implemented by the module rampart.

Below is an example of policy to be included on the module rampart:

<wsp:Policy wsu:Id="UTOverTransport" 
             xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
             xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">
   <wsp:ExactlyOne>
       <wsp:All>
           <sp:TransportBinding xmlns:sp="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy">
              <wsp:Policy>
                 <sp:TransportToken>
                    <wsp:Policy>
                       <sp:HttpsToken RequireClientCertificate="false"/>
                    </wsp:Policy>
                 </sp:TransportToken>
                 <sp:AlgorithmSuite> <wsp:Policy> <sp:Basic256/> </wsp:Policy> </sp:AlgorithmSuite>
                 <sp:Layout> <wsp:Policy> <sp:Lax/> </wsp:Policy> </sp:Layout> <sp:IncludeTimestamp/>
              </wsp:Policy>
           </sp:TransportBinding>
           <sp:SignedSupportingTokens xmlns:sp="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy">
               <wsp:Policy>
                    <sp:UsernameToken 
                       sp:IncludeToken="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy/IncludeToken/AlwaysToRecipient" /> 
               </wsp:Policy> 
           </sp:SignedSupportingTokens>
           <ramp:RampartConfig xmlns:ramp="http://ws.apache.org/rampart/policy">
               <ramp:user>alice</ramp:user>
               <ramp:passwordCallbackClass>org.apache.rampart.samples.policy.sample01.PWCBHandler</ramp:passwordCallbackClass>  
           </ramp:RampartConfig>
        </wsp:All> 
    </wsp:ExactlyOne> 
</wsp:Policy>

The PolicyData Element is used only by EngageModule and has the following attributes:

• policy_key: Defines the key to set the policy for the service invocation.
  The attribute's admitted values are:
  • rampartPolicy

ModuleProperty

This element is a specific property form the module to engage. For example:
The property org.apache.axis2.addressing.AddressingConstants.DISABLE_OUTBOUND_ADDRESSING_VALIDATION set to true prevents a fault if SOAPAction is not set.

The ModuleProperty Element is used only by EngageModule. Its attributes are:

Attribute	Type	Description
name	required	Name of the ModuleProperty
value	required
type	optional	The attribute's default value is String and its admitted values are: String Boolean Byte Short Int Long Float Double