Http-call

Description

The GreenVulcano^® ESB http-call plug-in allows the data exchange through the HTTP protocol.

VulCon / GV Console Configuration

Use the HTTP VCL plugin if you want to call HTTP methods on remote servers.

The http-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.http.HTTPCallOperation.
name	required	Operation name. Used in the Flow section to associate workflow nodes to VCL operations.

Might contain the following sub-elements:

• Description
• endpoint
• method

endpoint

Endpoint configuration to connect to the server.

The endpoint Element is used by: http-call. Its attributes are:

Attribute	Type	Description
host	required	Host to connect to.
port	optional	Port where the service is exposed. Default port is '80'.
secure	optional	Defines if the endpoint connection is secure or not. If secure is 'true', the default connection protocol will be 'http'; otherwise, the default connection protocol will be 'https'. The default value is 'false'.
custom-protocol	optional	Can be one of those defined locally for this 'http-call', or globally in GreenVulcano® ESB on GVSupport configuration.

Attribute	Type	Description
conn-timeout	optional	Defines the connection timeout, in ms. Default to 10000ms.
so-timeout	optional	Defines the timeout to wait for a server response, in ms. Default to 30000ms.
context-path	optional	Optional context path to prepend to remote URI call.

It has the subelements:

• Description
• CustomProtocol
• Proxy

• BasicHttpAuth
• NTLMHttpAuth

CustomProtocol

This element represents the custom protocol handler configuration. Refer to HttpClient documentation for further info: http://hc.apache.org/httpclient-3.x/sslguide.html

Its attributes are:

Attribute	Type	Description
name	required	Name identifier for this protocol.
protocol-scheme	required	The URI protocol scheme (http, https, etc.).
protocol-socket-factory	required	The custom socket factory class, implementation of class org.apache.commons.httpclient.protocol.ProtocolSocketFactory. If this class do not have a default constructor, you can specify constructor arguments using constructor-args element.
protocol-default-port	required	The default port number for this custom protocol.
protocol-virtual-scheme	optional	You can specify this parameter to use your own custom protocol designator as well as the default protocol implementation, specified by protocol-scheme attribute.

Its subelements are:

• Description
• constructor-args

constructor-args

Contains more constructor-param items where you can specify the constructor arguments, if your protocol socket factory class does not have a default constructor.

constructor-param

The constructor-param Element is a constructor parameter. It has the attributes:

Attribute	Type	Description
type	required	Parameter type. Only simple java types are supported. The attribute's admitted values are: byte boolean char double float int long short String
value	optional	Parameter value. Do not specify the value of this parameter if null should be passed. #Encrypted. The attribute's admitted values are: true false

method

Method to invoke on the server.

Its attributes are:

Attribute	Type	Description
name	required	Method name. The attribute's admitted values are: OPTIONS GET HEAD POST PUT DELETE
request-uri	required	Request URI. Can contain placeholders.
ref-dp	optional	Name of Data provider to use to prepare the request.

Attribute	Type	Description
uri-escaped	optional	If true the request-uri is already escaped, if false (WARNING!!!) the uri is escaped by the plug-in. Default to true.