FileAdapter- Operation ListFile

FileAdapter- Operation ListFile

The "List Files" operation in a File Adapter is used to retrieve a list of files from a specified directory. This operation is part of the File Adapter functionality in Oracle SOA Suite or Oracle Service Bus, and it allows integration developers to work with files in file systems as part of their business processes or services.

Here's an overview of how the "List Files" operation works:

Configuration:

Before using the "List Files" operation, you need to configure the File Adapter with the necessary settings, such as the directory path, file name patterns, and other relevant parameters.

Operation:

The "List Files" operation, as the name suggests, is used to list the files present in a specified directory. When you invoke this operation, it queries the file system and returns a list of file names that match the specified criteria.

Input Parameters:

The operation typically takes input parameters such as the directory path, file name patterns (wildcards), and other criteria for listing files. These parameters allow you to filter the list of files based on specific conditions.

Output:

The output of the "List Files" operation is a collection of file names that meet the specified criteria. The list can then be processed further in your integration flow.

Use Cases:

This operation is useful in scenarios where you need to process multiple files in a directory, for example, picking up all files that match a certain naming pattern or files modified after a specific date.

Error Handling:

As with any operation, it's important to implement error handling to deal with potential issues, such as connectivity problems or invalid directory paths.

Here's a simplified example of using the "List Files" operation in BPEL (assuming Oracle SOA Suite):

xml:

<bpel:invoke name="ListFiles" partnerLink="FileAdapterPL" operation="listFiles">

  <bpel:inputVariable name="inputVariable">

    <!-- Specify input parameters for listing files -->

  </bpel:inputVariable>

  <bpel:outputVariable name="outputVariable" />

</bpel:invoke>

In this example, FileAdapterPL is the partner link to the File Adapter, and the listFiles operation is invoked to retrieve a list of files based on the specified criteria. The result is stored in the outputVariable for further processing in the BPEL process.