The following node is available in the Open Source KNIME predictive analytics and data mining platform version 2.7.1. Discover over 1000 other nodes, as well as enterprise functionality at http://knime.com.

Generic Webservice Client

Invokes a generic document-style webservice given its WSDL location. In the dialog you first have to enter the URL to the webservice's description file (WSDL file). Then you have to choose a service (usually there is only one available), a port (or binding) and an operation. The two tables at the bottom will then display the webservice's input parameters and the output values it produces.
Each of the input parameters must be mapped to either a column from the input table, which you can choose in the rightmost column of the table (just click into it to get an editor to choose a column), or a constant value, which you can enter in the second-rightmost column after having activated the checkbox for constant values.
In the bottom table you may decide which output values you want to include in the output table. For each desired output parameter, activate the "Include" check box and enter the respective output column name. The "All in List" field will contain check boxes if the output parameter represents a collection (see below)
Please note, that this node does currently not support optional input parameters. Also webservices that need authentication are not accessible.

Dialog Options

WSDL location
URL to the webservice's WSDL file. After entering the URL you have to click on the Analyze button. Note that fetching and parsing the WSDL takes place in background (buttons will be disabled).
Service
List of available services in the WSDL file, usually there is only one service available in which case the box is disabled.
Ports
List of available ports for the selected service. Usually there is only one port available in which case the box is disabled.
Operations
List of available operations for the chosen port. The input- and output parameter trees will update if a different operation is selected here.
Input
Table with all required input parameters which you have to be mapped to columns or constant values as described above. The table represents elements of a tree that is constructed by analyzing the complex input parameter types. The different columns represent:
Output
Table with all output values which you can assign to new column in the output table as described above. The values in the column are as follows:
Enable HTTP Basic Authentication
If the service requires baisc http authentication, enable this box and enter login credentials. This can be done by choosing credentials globally defined on the workflow; or by entering user name and password in the corresponding fields
Enable http Auto-Redirect
If selected, the underlying http connection will automatically follow any redirects given by the server.
Override Endpoint
If selected, the webservice endpoint as given in the wsdl will be overwritten using the value entered in the accompanying text field.
Add SOAP Header
An XML tree that will be inserted into the soap header of outgoing soap request (for instance identification tags required by the server). Note, the text snippet needs to be valid XML.
Parallel Invocation Count
The number of maximum asynchronous invocations (an invocation translates to the processing of a single input row). The "optimal" number depends on the endpoint. A high number increases the parallel job count at the service endpoint, possibly leading to an overload situation or a lock-out of the client. A low value increases the overall execution time.
Row Cache Size
The number of rows to be kept in memory at most. The output table will retain the same ordering as the input table. If for any reason the processing of a row takes significantly longer than the processing time of other rows, the webservice invocation will stall, keeping at most this number of rows in memory.
New RowID suffix
The string (usually only a character such as '_') is used when the webservice returns a list, and new row IDs need to be created. These new IDs will have the same base name as the original row ID + a suffix (the value entered here) + an increasing counter.

Ports

Input Ports
0 Input table, containing parameters for the webservice
Output Ports
0 The input table with additional columns holding the results from the webservice
This node is contained in KNIME WebService Client Node provided by KNIME GmbH, Konstanz, Germany.