Changeset 396 for trunk

Timestamp:

Mar 26, 2013, 5:10:36 PM (12 years ago)

Author:

lucadelu

Message:

improve documentation for python services

File:

• trunk/docs/services/howtos.txt (modified) (2 diffs)

trunk/docs/services/howtos.txt

@@ -25 +25 @@
 
 .. Note:: For each Service provided by your ZOO Python Services Provider, the ZCFG File 
-          must be named the same as the Python module function name.
+          must be named the same as the Python module function name (also the case of
+          characters is important).
 
 The ZCFG file should contain the following :
@@ -40 +41 @@
 **************************
 
-The Python module's function to be used as a service must:
+The Python module's function to be used take three arguments: the main configuration, inputs and outputs.
+All this values are passed to the Python module as dictionaries.
 
-- take three arguments : the main configuration, inputs and outputs maps are passed to the 
-  Python module as dictionaries.
-- return an integer : corresponding to the service status code. 
+Following you'll find an example for each parameters
 
-Sample Data Structure
-*********************
+Main configuration
+^^^^^^^^^^^^^^^^^^^^^
+Main configuration contains several informations, some of them are really useful to develop your service.
+Following an example ::
 
-In the following you'll find a sample argument passed to the Python module's function for 
-the two first main configuration file' sections.
+  {
+  'main': {'lang': 'en-UK',
+           'language': 'en-US',
+           'encoding': 'utf-8',
+           'dataPath': '/var/www/tmp',
+           'tmpPath': '/var/www/tmp',
+           'version': '1.0.0',
+           'mapserverAddress': 'http://localhost/cgi-bin/mapserv',
+           'isSoap': 'false',
+           'tmpUrl': 'http://localhost/tmp/',
+           'serverAddress': 'http://localhost/zoo'
+          },
+  'identification': {'keywords': 'WPS,GIS',
+                     'abstract': 'WPS services for testing ZOO',
+                     'fees': 'None',
+                     'accessConstraints': 'none',
+                     'title': 'testing services'
+                    },
+  'lenv': {'status': '0',
+           'soap': 'false',
+           'cwd': '/usr/lib/cgi-bin',
+           'sid': '24709'
+          },
+  'env': {'DISPLAY': 'localhost:0'},
+  'provider': {'addressCountry': 'it',
+               'positionName': 'Developer',
+               'providerName': 'Name of provider',
+               'addressAdministrativeArea': 'False',
+               'phoneVoice': 'False',
+               'addressCity': 'City',
+               'providerSite': 'http://www.your.site',
+               'addressPostalCode': '38122',
+               'role': 'Developer',
+               'addressDeliveryPoint': 'False',
+               'phoneFacsimile': 'False', 
+               'addressElectronicMailAddress': 'your@email.com',
+               'individualName': 'Your Name'
+              }
+  }
 
-::
+Inputs
+^^^^^^^^^^^^
+The inputs are somethings like this ::
 
-  main={
-     "main": {"encoding": "utf-8",
-              "version": "1.0.0",
-              "serverAddress": "http://www.zoo-project.org/zoo/",
-              "lang": "fr-FR,en-CA"}, 
-     "identification": {"title": "The Zoo WPS Development Server",
-                        "abstract": "Development version of ZooWPS.",
-                        "fees": "None",
-                        "accessConstraints": "none",
-                        "keywords": "WPS,GIS,buffer"}
+  {
+  'variable_name': {'minOccurs': '1',
+                    'DataType': 'string',
+                    'value': 'this_is_the_value',
+                    'maxOccurs': '1',
+                    'inRequest': 'true'
+                   }
   }
+
+The access to the value you have to require for the ``value`` parameter, something like this ::
+
+  yourVariable = inputs['variable_name']['value']
+
+Outputs
+^^^^^^^^^^^^^
+The outputs data as a structure really similar to the inputs one ::
+
+  {
+  'result': {'DataType': 'string',
+             'inRequest': 'true',
+            }
+  }
+
+There is no ``'value'`` parameter before you assign it ::
+
+  inputs['result']['value'] = yourOutputDataVariable
+
+The return statement has to be an integer: corresponding to the service status code.
+
+The module should **return 3 if the process successfully ended otherwise it should return 4**.
+To add a message for the wrong result you can add the massage to ``conf["lenv"]["message"]``,
+for example:
+
+.. code-block:: python
+
+  conf["lenv"]["message"] = 'Your module return an error'
 
 Sample ZOO Python Services Provider