Overview

Heartbeat is a simple program to produce a periodic heartbeat message.

Developing

1. Clean up build env make clean
2. Build the software make build test
3. Run the software bin/darwin/amd64/heartbeat run

Running heartbeat periodically
{"appName":"heartbeat","level":"info","msg":"Running periodically","time":"2017-10-26T20:02:14-07:00"}
{"level":"info","msg":"Every heartbeat bears your name","time":"2017-10-26T20:02:14-07:00","type":"heartbeat"}
{"level":"info","msg":"Every heartbeat bears your name","time":"2017-10-26T20:02:15-07:00","type":"heartbeat"}
{"level":"info","msg":"Every heartbeat bears your name","time":"2017-10-26T20:02:16-07:00","type":"heartbeat"}

Building Releases

1. Clean up build env make clean
2. Build the software make all

Releases will be created in the releases directory

Running

heartbeat prints heartbeat messages to standard out with one message printed in json format every second, by default.

options can be printed with --help, heartbeat run's are most interesting permitting control over format (text, json) and period:

NAME:
   heartbeat run - Run the program

USAGE:
   heartbeat run [command options] [arguments...]

OPTIONS:
   --format value  Specify the output format: text, json
   --period value  Specify the period between heartbeat messages. Valid time units are 'ns', 'us' (or 'µs'), 'ms', 's', 'm', 'h' (default: 1s)

Homage

Yes, the default message is a reference to Amy Grant's classic Every Heartbeat