How can we handle reading files from an unreliable network resource?

Question

The server we are sending to is sometimes down. Don't want to get a channel shutdown or a ton of error messages.

Answer 1

You can setup your source node to read from a script that will look in the folder every five minutes or so and retry. 

 

try {

   // read all files in C:\HL7\*.hl7

   var incoming = new java.io.File("C:\\HL7\\");

   var allFiles = incoming.listFiles();

   if (allFiles !== null) {

      // skip folders and hidden files

      for (var i = 0; i < allFiles.length; i++) {

         var file = allFiles[i];

         if (!file.isDirectory() && !file.isHidden() && file.getName().endsWith('.hl7') && file.length() > 0) {

            // this call adds a new inbound message

            qie.addInboundMessage(qie.readFile(file), file.getName());

            // delete the file, now that we have processed it

            qie.deleteFile(file);

         }

      }

   }

} catch (err) {

   qie.debug('Cannot read file: ' + err);

}