Location Agent

Introduction

The csw-location-agent project provides an application used to register and track non-csw services, such as Redis, which is used to implement the Event and Alarm Services.

Usage

See here for the command line usage.

Design

Location service agent is a CLI application build using Location Client.

As shown in above diagram, it accepts external command, name of the services and some other optional arguments.

On execution, Location agent performs following actions in sequence:

1. Spawns new process and executes provided command in that process

2. Adds exit hook on this process, so that agent shutdowns gracefully on termination of child process

3. Registers Tcp or Http connections with provided component names with location service using location http client

4. Adds shutdown hook to unregister services on termination (this is done as a part of step 2)

Log messages are configured in application.conf to log only to file (under $TMT_LOG_HOME/csw/logs).