A decorator implementation

Our decorator pattern example will be runnable, so we'll put it in the main package and define a main() function.

We use the easy-metrics package for recording and displaying our metrics. It comes out of the box with a nice GUI for displaying statistics.

We also import the decorator package and preface that import with a dot (.) in order to access the identifiers in the decorator package, in the local file block without a qualifier.

The main.go file

Let's have a look at the contents of main.go:

package main

import (
"crypto/tls"
   "flag"
   "fmt"
   "io/ioutil"
   "log"
   "net/http"
   "net/url"
   "os"
   "os/signal"
   "time"
   "easy_metrics"
. "decorator"
)

const  (
host = "127.0.0.1"
protocol = "http://"
)
var (
   serverUrl string
   proxyUrl string
)

Note

This is what the imports looked like before using the init script and its aliases (and glide):import (. . .    "time"    "github.com/l3x/fp-in-go/chapter5/02_decorator/easy_metrics"    . "github.com/l3x/fp...