Using the Software AG IDL Extractor for Natural

This document describes how to use the Software AG IDL Extractor for Natural. It covers the following topics:

Extracting IDL from Natural Subprogram Sources in NaturalONE

In a NaturalONE project in Software AG Designer, IDL can be extracted directly from Natural subprogram sources (CALLNATs), using the following steps:

Step 1: Start the IDL Extractor for Natural Wizard

There are various ways of starting the IDL Extractor for Natural Wizard:

Select a NaturalONE Project

To extract the IDL, select the NaturalONE project in the Designer.

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From the context menu, choose Extract IDL... and continue with Step 2: Select the Natural Library from NaturalONE Project (Optional).

Select a Natural Library in a NaturalONE Project

To extract the IDL, select the NaturalONE library in the Designer.

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From the context menu, choose Extract IDL... and continue with Step 3: Select the Natural Subprograms from NaturalONE Project.

Select Natural Subprograms in a NaturalONE Project

To extract the IDL, select one or multiple Natural subprogram sources (.NSN) in the Designer.

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From the context menu, choose Extract IDL... and continue with Step 3: Select the Natural Subprograms from NaturalONE Project.

Alternatively, you can start the IDL Extractor for Natural from the context menu of the Natural source folder or any parent folder in the project, including the Natural library and the Project folder.

Step 2: Select the Natural Library from NaturalONE Project (Optional)

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Select the Natural library from the list and choose Next to continue with Step 3: Select the Natural Subprograms from NaturalONE Project.

Step 3: Select the Natural Subprograms from NaturalONE Project

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In the Source pane, select at least one program from the list of Natural subprograms (CALLNATs). You can also choose Select All or Deselect All.

In the Extraction Setting pane, check Redesign the interfaces if you want to design the extracted interfaces to the Natural subprograms. The Next button will be enabled. See User-defined Mapping. If you do not check Redesign the interfaces, see Natural to IDL Mapping for default mappings.

By checking Replace special characters in parameter names with underscore under Extraction Setting, the special characters ("$", "#", "&", "@", "/") allowed in Natural parameters can be replaced by underscores, see also Extracting IDL Parameter Names.

In the Target pane, select the container where the IDL file will be stored. Enter the file name of the new IDL file. If the IDL file exists, it will be overwritten. Preserving the IDL File and optional mapping file allows you to customize the IDL (alias names, in/out/inout modifiers) for subsequent optimized client generation steps. See Server Mapping Files for Natural in the Designer documentation.

Choose Next to redesign the interfaces. See Step 6: Redesign the Interface for Natural Subprograms (Optional). To enable the Next button, check Redesign the interfaces.

Choose Finish to start extraction with a default mapping. For more information see Extraction Result.

Extracting Software AG IDL File from a New Natural RPC Environment

This section covers the following topics:

Step 1: Start the IDL Extractor for Natural Wizard

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Press Next and continue with Step 3: Edit RPC Environment.

Step 2: Create a New RPC Environment

If no RPC environments are defined, you only have the option to Create a New RPC Environment. The RPC environments are managed in the Preferences.

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Choose Create a new RPC Environment and press Next to create a new RPC environment. Continue with Step 3: Edit RPC Environment.

Note:
The folder File and the RPC environment localhost@NATSRV2800 (default RPC server for NaturalONE) are available only if NaturalONE plugins are installed.

Step 3: Edit RPC Environment

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Define the new RPC environment on this page. Required fields are Broker ID, Server Address and the Environment Name. The timeout value must be in the range 1-9999 seconds (default: 60).

The EntireX Authentication fields apply to the broker.

The RPC Server Authentication fields apply to the RPC server. If the Natural RPC Server operates under Natural Security,

  • your user ID and password must be defined in Natural Security. If the Natural Security user ID or password differs from the broker user ID and password, use RPC Server Authentication - otherwise use EntireX Authentication for both.

  • access to the Natural system library SYSIDL is required

Note:
Users who do not have access rights to the Natural system library SYSIDL are not allowed to extract IDL from your Natural environment.

With Extractor Settings, specify the Natural library and program name from which you want to extract. You have the following options to select a range of Natural libraries and programs:

Wildcard Position Extract from
* (asterisk) any Libraries or program names that match any sequence of characters.
? (question mark) any Libraries or program names that match any single character.
> (greater than) final character only Libraries or program names after.
< (less than) final character only Libraries or program names before.
none   Specified library or program. If the library or program does not exist, an error message is given.

Any Natural RPC Server can be used. Only Natural libraries that reside in the FUSER system file of the Natural RPC Server can be accessed.

Press Next to continue.

Step 4: Select Natural Library from RPC Environment (Optional)

All Natural libraries that reside in the FUSER system file of the Natural RPC Server and that match the specification in the Extractor Settings are listed here. See Step 3: Edit RPC Environment. This step is skipped if exactly one Natural library matches the specification. In this case continue with Step 5: Select Natural Subprograms from RPC Environment.

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Only Natural libraries from the Natural User System file (FUSER) are displayed. If the Natural RPC server operates under Natural Security, Natural libraries are displayed only if you are allowed to access the library. This means that if a library is people-protected and you do not have access rights, it is not displayed. See also RPC Server Authentication under Step 3: Edit RPC Environment.

Select the Natural library from the list and choose Next to continue with Step 5: Select Natural Subprograms from RPC Environment.

Step 5: Select Natural Subprograms from RPC Environment

All Natural subprograms that match the specification in the Extractor Settings are listed here. See Step 3: Edit RPC Environment.

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In the Source pane select at least one program from the list of Natural subprograms (CALLNATs). You can also choose Select All or Deselect All.

In the Extraction Settings pane, specify whether the IDL is to be extracted from Natural subprogram sources or compiled objects. The following restrictions apply:

  • Extract from Natural sources (recommended)
    Extracting from a source is only possible if the compiled object and source are in sync. For example, in the screen above, source extraction is not possible for

    • SENDMAIL, because there is no source, only an object

    • SENDPOST, because the source is modified after last compilation

  • Extract from Natural objects
    Extracting from an object is always possible.

Check Redesign the interfaces if you want to design the extracted interfaces to the Natural subprograms. The Next button will be enabled. See User-defined Mapping. If you do not check Redesign the interfaces, refer to Natural to IDL Mapping for default mappings.

Check Replace special characters in parameter names with underscore to substitute the special characters '$', '#', '&', '@', '/' by underscores. See also Extracting IDL Parameter Names in Natural to IDL Mapping.

Choose Next to continue. If multiple Natural subprograms have been selected in the Natural subprogram selection step, redesign the next interface. You can see the current and total number of the subprogram you are extracting from in the title (n/m).

Choose Finish to extract the interface. For further subprograms that have been selected, a default mapping is created, see Extraction Result.

Step 6: Redesign the Interface for Natural Subprograms (Optional)

In this step, you can redesign the interface. This includes:

These tasks are described in more detail under Step 6: Redesign the Interface for Natural Subprograms (Optional).

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Use this page for the following tasks:

  • Define the direction of parameters in the extracted interface. Choose Map to In, Map to Out or Map to InOut for each parameter on level 1.

  • Define which parameters redefined in the Natural PDA are part of the extracted interface. Choose Map to In, Map to Out or Map to InOut for the REDEFINE base parameter or any REDEFINE path.

  • Hide or suppress unneeded parameters in the extracted interface. Choose Suppress.

  • Set parameters to constants and hide or suppress them in the extracted interface. Choose Set Constant.

This page consists of the following main parts:

  • Top line
    The top line contains the current Natural subprogram and the IDL library name. The combo box can be used as quick navigation if more than one Natural subprogram is selected.

  • Middle
    The middle part contains a tab item for each interface ( IDL program) extracted from the Natural subprogram.

    Note:
    It is possible to extract more than one interface (IDL program) from a Natural subprogram. To create, rename and remove interfaces, use the toolbar on the right side of tab folder.

    Icon Function Description

    graphics/nat_redesignInterface_create.gif

    		 Create Create a new interface (IDL program) based on the original parameters of the Natural subprogram.

    graphics/nat_redesignInterface_duplicate.gif

    		 Duplicate Create a new interface (IDL program) based on the current interface (active tab). All modifications of the current interface are copied.

    graphics/nat_redesignInterface_rename.gif

    		 Rename Change the name of the current interface (active tab). The name must be unique.

    graphics/nat_redesignInterface_remove.gif

    		 Remove Remove the current interface (active tab). At least one interface must exist.

    graphics/nat_redesignInterface_expandAll.gif

    		 Expand All Expand the Natural and IDL tree.

    graphics/nat_redesignInterface_collapseAll.gif

    		 Collapse All Collapse the Natural and IDL tree.

  • Middle left
    Input pane. The parameters of the Natural subprogram to extract from. For each Natural subprogram parameter you can choose one of the operations Map to In, Map to Out, Map to InOut, Suppress and Set Constant. Additionally for REDEFINEs, a quick fix is available (icons on the left side of the pane) to choose which parameters redefined in the Natural PDA are part of the extracted interface.

    Notes:

    1. The mapping operations Map to In, Map to Out, Map to InOut, Suppress and Set Constant are also available in the context menu of the Natural parameter tree.
    2. Natural parameters that are suppressed or set to constant in the interface are rendered in italic type. For example, in the screen above, FUNCTION (A3) is set to constant; FILLER1(A4) and FILLER2(A60) are suppressed; FUNCTION-DATA(A161) and its first REDEFINE path are implicitly suppressed because the second REDEFINE path with prefix MOD-DATA-2-R2 is selected.
    3. The value for Natural parameters set to constant are displayed behind the parameter in the Natural parameter tree (e.g. in the screen above, FUNCTION (A3) [MOD]).
    4. Natural parameters mapped in the interface are displayed with a green tick (graphics/cw_decorator.png).

  • Middle right
    Output pane. The extracted interface (IDL).

  • Bottom
    Reference. The Natural subprogram source and its PDA sources, each displayed in a separate tab.

Tips:

  • The panes can be resized.

  • To enlarge parameter lists, use the vertical bars on the side.

  • You can close the bottom pane if it is not needed by clicking on the triangle next to Natural Subprogram Source. In this way, you have more space for viewing the upper panes.

Use the quick navigation or choose Next to continue. If multiple Natural subprograms have been selected in the Natural subprogram selection step, redesign the next interface. The amount of subprograms extracted so far is indicated by the fraction next to the title (current/total).

Choose Next to continue. If multiple Natural subprograms have been selected in the Natural subprogram selection step, redesign the next interface. You can see the current and total number of the subprogram you are extracting from in the title (n/m).

Choose Finish to extract the interface. For further subprograms that have been selected, a default mapping is created, see Extraction Result.

Extracting Software AG IDL File from an Existing Natural RPC Environment

Step 1: Start the IDL Extractor for Natural Wizard

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Choose Next and continue with Step 6: Redesign the Interface for Natural Subprograms (Optional).

Step 2: Select an RPC Environment

If RPC environments are defined, you can select an existing one. RPC environments are managed in the Preferences.

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Select Use existing RPC environment and select the appropriate RPC environment from the list below.

If Modify the selected RPC environment is checked, the selected RPC environment can be modified before extraction starts.

Press Next to continue.

Note:
The folder File and the RPC environment localhost@NATSRV2800 (default RPC server for NaturalONE) are available only if NaturalONE plug-ins are installed.

Extraction Result

When the wizard has finished successfully, you can see two additional files in your Eclipse project:

  • .idl file
    The IDL file that describes the RPC interface of the Natural server component that implements the service's business logic. The IDL file is opened with the IDL Editor. See Software AG IDL File in the IDL Editor documentation.

  • .cvm file (optional)
    This server mapping file completes the IDL file with a mapping from the programming-language-neutral parameter definition in the IDL file to the parameters and data types expected by the Natural subprograms (CALLNATs). Always keep the server mapping in the same folder as its related IDL file. See Server Mapping Files for Natural in the Designer documentation.

For more information on how Natural programs are extracted, refer to Natural to IDL Mapping.

Preferences

Use the preference page for IDL Extractor for Natural to manage the default values for the IDL Extractor for Natural wizard.

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The option IDL Extraction from Source or from Object determines from which code type the IDL file is to be extracted.

With the check box Replace special characters in parameter names with underscore, the special characters ("$", "#", "&", "@" , "/") allowed in Natural parameters can be replaced by underscores. See also Rules for Coding Group and Parameter Names.

For more information on object and source extraction and character replacing, see Step 5: Select Natural Subprograms from RPC Environment.

RPC environments are managed with the RPC Environment Manager.