Difference between revisions of "Data provider"
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==Definition== | ==Definition== | ||
| − | ODP (Object Data Provider) is a framework that lets you manage bidirectional conversion between instances of GVBuffer and generic objects, the access to the generic objects fields will be execute through OGNL and | + | ODP (Object Data Provider) is a framework that lets you manage bidirectional conversion between instances of GVBuffer and generic objects, the access to the generic objects fields will be execute through OGNL, XPath and Regex. |
Each Data provider contains a field element identify by a key, this fileds are of three type and indicates when an extension has to be applied: | Each Data provider contains a field element identify by a key, this fileds are of three type and indicates when an extension has to be applied: | ||
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#Output: the object that is returned by the DataProvider. | #Output: the object that is returned by the DataProvider. | ||
| − | Expression are pre / post processing of data that can be made automatically from the connector before invoking GreenVulcanoESB and / or before returning the result to the caller. | + | Expression are pre / post processing of data that can be made automatically from the connector before invoking GreenVulcanoESB and / or before returning the result to the caller. |
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Following a list of Data provider avaiable: | Following a list of Data provider avaiable: | ||
Revision as of 18:38, 10 February 2012
Definition
ODP (Object Data Provider) is a framework that lets you manage bidirectional conversion between instances of GVBuffer and generic objects, the access to the generic objects fields will be execute through OGNL, XPath and Regex.
Each Data provider contains a field element identify by a key, this fileds are of three type and indicates when an extension has to be applied:
- INOUT, The expression is evaluated on the object set (usually the current GVBuffer, unless otherwise specified by the attribute 'source-selector') the value returned by the expression, is added to the context with the prefix 'key_' + @ key, and set the data provider to be returned in the output.
- IN, The expression is evaluated on the object set (usually the current GVBuffer, unless otherwise specified by the attribute 'source-selector') the value returned by the expression is added to the context with the prefix 'key_' + @ key.
- OUT, The expression is evaluated directly on the object that is returned by the DataProvider.
In all cases, two variables are added to the context:
- Input: object set, usually the current GVBuffer, which will not be overwritten from attribute 'source-selector';
- Output: the object that is returned by the DataProvider.
Expression are pre / post processing of data that can be made automatically from the connector before invoking GreenVulcanoESB and / or before returning the result to the caller.
Following a list of Data provider avaiable:
- ObjectDataProvider:
- StringDataProvider
- MapDataProvider
- ArrayDataProvider
- CollectionDataProvider
- XMLEventCollectionDataProvider
- InputStreamDataProvider
- JMSBytesMessageDataProvider
- JMSMapMessageDataProvider
- JMSObjectMessageDataProvider
- JMSStreamMessageDataProvider
- JMSTextMessageDataProvider
- Axis2MessageContextDataProvider
- Axis2SAAJSOAPMessageDataProvider
- HttpMethodDataProvider
{{#w4grb_rate:}} <w4grb_ratinglist latestvotes items="5" nosort/>
