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JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
HCL Informix® JSON compatibility
The Informix® JSON Compatibility Guide describes how applications that use the popular JSON-oriented query language created by MongoDB can interact with data stored in HCL Informix.
Wire listener
The wire listener is a mid-tier gateway server that enables communication between MongoDB, REST API, and MQTT clients and the Informix® database server.
Wire listener command line options
You can use command line options to control the wire listener.
Wire listener logging
The wire listener can output trace, debug, informational messages, warnings, and error information to a log.

JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
- HCL Informix® JSON compatibility
  The Informix® JSON Compatibility Guide describes how applications that use the popular JSON-oriented query language created by MongoDB can interact with data stored in HCL Informix.
  - About the Informix® JSON compatibility
    You can combine relational and JSON data into a single query by using the Informix® JSON compatibility features.
  - Wire listener
    The wire listener is a mid-tier gateway server that enables communication between MongoDB, REST API, and MQTT clients and the Informix® database server.
    - Configuring the wire listener for the first time
      You must configure the wire listener by specifying an authorized user and customizing the wire listener configuration file.
    - The wire listener configuration file
      The settings that control the wire listener and the connection between the client and database server are set in the wire listener configuration file.
    - Wire listener command line options
      You can use command line options to control the wire listener.
      - Starting the wire listener
        You can start the wire listener for the MongoDB API, the REST API, or the MQTT protocol, by using the start command.
      - Running multiple wire listeners
        You can run multiple wire listeners.
      - Stopping the wire listener
        You can stop the wire listener by using the stop command.
      - Wire listener logging
        The wire listener can output trace, debug, informational messages, warnings, and error information to a log.
    - User authentication with the wire listener
      You can authenticate users through the wire listener with MongoDB authentication or with the database server, through a pluggable authentication module (PAM).
    - Encryption for wire listener communications
      You can use Secure Sockets Layer (SSL) protocol to encrypt communication for the wire listener.
    - High availability support in the wire listener
      The wire listener provides high availability support.
  - JSON data sharding
    You can shard data with HCL Informix®. Documents from a collection or rows from a table can be sharded across a cluster of database servers, reducing the number of documents or rows and the size of the index for the database of each server. When you shard data across database servers, you also distribute performance across hardware. As your database grows in size, you can scale up by adding more shard servers to your shard cluster.
  - MongoDB API and commands
    The Informix® support for MongoDB application programming interfaces and commands are described here.
  - REST API
    The REST API provides a method for accessing JSON collections in Informix® and provides driverless access to your data.
  - MQTT protocol
    The MQTT protocol provides a method for loading JSON data in Informix®.
  - Manage time series through the wire listener
    You can create and manage time series through the wire listener. You interact with time series data through a virtual table.
  - Troubleshooting Informix® JSON compatibility
    Several troubleshooting techniques, tools, and resources are available for resolving problems that you encounter with Informix® JSON compatibility.

Wire listener logging

The wire listener can output trace, debug, informational messages, warnings, and error information to a log.

The default logging mechanism for the wire listener is Logback. Logback is pre-configured and installed along with the JSON components. For more information on how to customize Logback, see http://logback.qos.ch/.

If you start the MongoDB API wire listener from the command line, you can specify the amount of detail, name, and location of your log file by using the -loglevel and -logfile command-line arguments.

Important: If you have customized the Logback configuration or specified another logging framework, the settings for -loglevel and -logfile are ignored.