DBOCallSP

Description

The DBOCallSP element represents the DBO optimized for operations on store procedures.

GreenVulcano^® ESB configuration

DBOCallSP with VulCon

DBOCallSP might contain the following sub-elements:

• Description
• DHVariables
• CallDescriptor

Its attributes are:

Attribute	Type	Description
type	fixed	This attribute must assume the value dbo
class	fixed	This attribute must assume the value it.greenvulcano.gvesb.datahandling.dbo.DBOCallSP
name	required	DBOCallSP name
transformation	optional	Transformation to be applied on the input data to obtain the internal XML commands.
force-mode	required	Force mode of the DBO, can be used in DBOBuilder whit more heterogeneous DBO. Mode: caller - inherit the mode of the caller call - call procedure mode. The attribute's admitted values are: caller xml2db
execute-query	required	This parameter specifies is the callable statements must be executed with API CallableStatement#executeQuery(). Default is false. The attribute's admitted values are: true false
jdbc-connection-name	required	DataSource JNDI name. Override connection defined in DBOBuilder.
ignore-input	required	Tell the engine do not use the input data. The attribute's admitted values are: true false
input-data	required	The default is the value of @name-Input. Can be set as the @output-data of a preceding DBO to use its output as input.
output-data	required	The default is the value of @name-Output.

As an example, see the following stored procedure:

PROCEDURE LOAD_XML_FILE (v_file_name IN VARCHAR2, v_file IN CLOB, v_file_id OUT NUMBER) AS
....

<dh-call class="it.greenvulcano.gvesb.virtual.datahandler.DataHandlerCallOperation"
      name="TestInsertXML" type="call">
    <DBOBuilder class="it.greenvulcano.gvesb.datahandling.dbobuilder.DBOBuilder"
           isXA="true" jdbc-connection-name="ds.gv_test"
           name="TestInsertXML" transacted="true"
           type="dbobuilder">
        <DBOCallSP class="it.greenvulcano.gvesb.datahandling.dbo.DBOCallSP"
                name="InsertXML" transformation="InsertXML"
                type="dbo">
                    <CallDescriptor>
                        <statement id="0" type="callsp">begin load_xml_file(?, ?, ?); end;</statement>
                        <SPOutputParameters>
                              <SPOutputParameter db-type="number"
                                       java-type="string" position="3"
                                       prop-name="RESULT"
                                       return-in-prop="false"/>
                        </SPOutputParameters>
                    </CallDescriptor>
        </DBOCallSP>
    </DBOBuilder>
</dh-call>

The service receive as input an XML document (and a FILE_NAME property) and load it into a table, returning a number representing the key of the file in the table. The InsertXML transformation create the following XML in order to provide the parameters for the procedure:

<RowSet>
    <data>
        <row id="0">
            <col>Test.txt</col>
            <col type="long-string">&lt;PersonsData&gt;
    &lt;PersonData&gt;
    &lt;Name&gt;ANTONIO ROSSI&lt;/Name&gt;
    &lt;BirthDate&gt;05/02/1980&lt;/BirthDate&gt;
    &lt;City&gt;MILANO&lt;/City&gt;
    &lt;/PersonData&gt;
    &lt;/PersonsData&gt;</col>
        </row>
    </data>
</RowSet>

The DBOCallSP output is:

<RowSet>
    <data id="0">
        <row id="sp_result">
            <col id="RESULT"  type="string">11</col>
        </row>
    </data>
</RowSet>

In order to invoke a stored function, as the following:

FUNCTION LOAD_XML_FILE (v_file_name IN VARCHAR2, v_file IN CLOB) RETURN NUMBER AS
....

<dh-call class="it.greenvulcano.gvesb.virtual.datahandler.DataHandlerCallOperation"
      name="TestInsertXML" type="call">
    <DBOBuilder class="it.greenvulcano.gvesb.datahandling.dbobuilder.DBOBuilder"
           isXA="true" jdbc-connection-name="ds.gv_test"
           name="TestInsertXML" transacted="true"
           type="dbobuilder">
        <DBOCallSP class="it.greenvulcano.gvesb.datahandling.dbo.DBOCallSP"
                name="InsertXML" transformation="InsertXML"
                type="dbo">
                    <CallDescriptor>
                        <statement id="0" type="callsp">begin ? := load_xml_file(?, ?); end;</statement>
                        <SPOutputParameters>
                              <SPOutputParameter db-type="number"
                                       java-type="string" position="1"
                                       prop-name="RESULT"
                                       return-in-prop="false"/>
                        </SPOutputParameters>
                    </CallDescriptor>
        </DBOCallSP>
    </DBOBuilder>
</dh-call>

The service receive as input an XML document (and a FILE_NAME property) and load it into a table, returning a number representing the key of the file in the table. The InsertXML transformation create the following XML in order to provide the parameters for the procedure:

<RowSet>
    <data>
        <row id="0">
            <col out-only="true"/>
            <col>Test.txt</col>
            <col type="long-string">&lt;PersonsData&gt;
    &lt;PersonData&gt;
    &lt;Name&gt;ANTONIO ROSSI&lt;/Name&gt;
    &lt;BirthDate&gt;05/02/1980&lt;/BirthDate&gt;
    &lt;City&gt;MILANO&lt;/City&gt;
    &lt;/PersonData&gt;
    &lt;/PersonsData&gt;</col>
        </row>
    </data>
</RowSet>

Please note the first col element, containing the out-only attribute: it's required as a placeholder to tell the DataHandler the correct order of the input parameters to populate. The DBOCallSP output is:

<RowSet>
    <data id="0">
        <row id="sp_result">
            <col id="RESULT"  type="string">11</col>
        </row>
    </data>
</RowSet>