File/Hadoop JSON Input and Output Adapter
The File/Hadoop JSON Input adapter takes JSON messages from JSON files on a local or Hadoop Distributed File System (HDFS), transforms them to ESP format, and publishes them to ESP streams. The File/Hadoop JSON Output adapter takes data from Event Stream Processor, formats it into JSON format, and sends it to a JSON file on a local file system or HDFS.
Commands specified in the cnxml file for this adapter cannot contain the following strings: "mv", "rm", or "del".
These adapters can run in managed or unmanaged mode.
Managed external adapters:
- Are started and stopped by the ESP server with ESP projects.
- Have a cnxml adapter configuration file that is configured within SAP Event Stream Processor Studio.
- Are referenced in a CCL ATTACH ADAPTER statement.
Unmanaged external adapters:
- Start and stop independently of the ESP server and ESP projects.
- Are configured independently.
- Are not referenced in a CCL ATTACH ADAPTER statement.