web server - Borland Technical Publications

Web Service providers
Java:VISIBROKER provider
This provider assumes that the class serving the web service is a Visibroker server.
When a web service request arrives, this provider:
1 Initializes the ORB.
2 Locates the CORBA object using “objectName” and “locateUsing” properties.
3 Invokes the specified method on the CORBA stub.
The parameters are:
■
objectName: The name of the object. This is a mandatory parameter.
■
locateUsing: This parameter specifies which mechanism the provider uses to locate
the object.
The 3 possible values are:
osagent
nameservice
ior
The object is assumed to be in osagent. The bind() method on helper
is used to locate the object. The Server object must be registered with
the same osagent that the Partition is using. If poaName is also
specified, objectName is located under that POA. This is the default
value of the parameter.
The object is assumed to be in Naming Service. The resolve()
method on the root context is used to locate the object. The
objectName must be the full name of the object starting from root
context. For example:
USA/California/SanMateo/BigAnimal
The VisiBroker server object must be registered with the same
name service that the Partition is using. Typically, a Partition starts
a name service with the name “namingService”. For a server to
use the same name service, it must be started as follows:
vbj -DSVCnameroot=namingservice Server
The objectName provided is assumed to be an IOR. The
string_to_object() method on the ORB is used to obtain the object.
The IOR can be in standard form. For example:
corbaname::172.20.20.28:9999#USA/California/SanMateo/
BigAnimal
IOR:xxx
corbaloc::172.20.20.28:30303,:172.20.20.29:30304/MyObject
■
■
className: The name of the class that is loaded when a request arrives on this
service. Typically, this is the name of the CORBA class generated and based on the
IDL. The VisiBroker client stubs, including this class, must be present in the WAR.
allowedMethods: The methods that are allowed to be invoked on this class. The
CORBA object can have more methods than listed here; the methods listed here are
available for remote invocation.
■
poaName: The name of the POA that hosts the CORBA object. This parameter is
relevant only when the locateUsing parameter value is osagent.
Example:
Chapter 9: Borland Enterprise Server Web Services 77