However, processing of large files is less trivial. Preferable you process it in smaller chunks. A file adapter should start the BPELprocess, this process must read this file in chunks.
For this example we will use the File Adapter to load a file of user and emails to update the user object within the Oracle Utilities Application Framework.
Remember you can repeat this process with other objects and other file types. Again I am illustrating the ease of integration. The first thing is to create an empty BPEL process that will hold our flow. You name the Service. The next step is to tell the Adapter the location of the files, how to process them and what to do with them after they have been processed.
I am using hardcoded locations in this example but you can have logical locations as well. I am now going to tell the adapter how to recognize the files I want to load.
In my case I am using CSV files and more importantly I am tell the adapter to run the process for each record in the file it encounters.
Now, I tell the adapter how often I want to poll for the files. I have taken the defaults. At this stage I have no explanation of the format of the input.
So I am going to invoke the Native Format Wizard which will guide me through the process of creating the file input format. After an introduction screen not shownyou specify the format of the input file.
The File Adapter supports multiple format types. The best way for the wizard to work is with a sample. I have a sample file and the wizard will ask how much of the file to use as a template. I will use the defaults. The sample contains multiple instances of a single record type.
The wizard supports complex types as well. We will use the appropriate setting for our file. You have to specify the file element and the record element. Up until this point your have not given the columns their names. In my case my sample includes the column names in the first record.
This is not always the case but you can specify the names and formats of columns in this dialog not shown. The wizard now generates the schema for the input file.
You can specify a name for the schema. You can test the schema by specifying an input sample. You will see the delimiters you specified earlier for the file and the records.
A confirmation screen will be displayed showing you the location of the schema in your project. You will now see the schema and elements prepopulated from the wizard.
The File Adapter configuration is now complete. You need to now add the product Web Service. You also have to add an Invoke node to call the service and generate the input and outputs variables for the call in the Invoke node.
Now, to get the inputs from File to the service. You have to use a Transform you can use an Assign action but a Transform action is more flexible. We name the Transform Node, Mapper File and associate the source of the mapping the schema from the Receive node and the output will be the input variable from the Invoke node.
We now build the transform. We first map the user and email attributes by drag and drop the elements from the left to the right.
Remember when we registered the service we actually used Read as the default.Chunking the file using the “Read File” option of the file-adapter is pretty staight forward, all you need todo is to specify the publish size.
Working with chucks for the “Synchronous Read File” option used from BPEL is less easy. 8 Using the File Adapter's Read Functionality. This chapter of the tutorial describes how to add a file adapter to read data from a file and call the OrderBooking BPEL process as an external service..
This chapter contains the following topics. Apr 05, · Implement a bpel process the reads the file using “ReadingFile” file adapter service and write to another using “WriteToFile” file adapter service.
Drag and drop the BPEL .
Oracle SOA 12C - File Adapter New File. b. Appending a file. This example illustrate both the example of reading a file and writing a file. We will also focus some of the out of box options this adapter provides. In the example given we are initiating a BPEL process from the file adapter, hence once its read the file successfully it.
4 Oracle JCA Adapter for Files/FTP. This chapter describes how to use the Oracle File and FTP Adapters, which work with Oracle BPEL Process Manager and Oracle Mediator.
Information on concepts, features, configuration and use cases for the Oracle File and FTP Adapters is also provided.
The File Adapter wizard appears, input a name and click Next. 3. Select as shown below and click Next. 4. Input as it is and click Next. 5. Select Write File and click Next. 6. Specify the directory where you want the Oracle BPEL to write files.
We can set the directory at runtime as well. 7. I chose the Native format; Click Finish.