Misc. bug fixes and addition of debug logging (#61)

* Fixing possible race condition when passing backoff around as a pointer.

* Adding a debug logger that is turned off by default. If debug is turned on, but a logger has not been assigned, a default logger that will print to STDOUT will be created.

* Making Mutex a pointer so that there's no chance it can accidentally be copied.

* Removing a leftover helper function from before we changed how we configured the client.

* Minor changes to demonstrate how a logger can be used in conjunction to debug mode in the sample client.

examples/client.go

@@ -18,14 +18,13 @@ import (
 	"flag"
 	"fmt"
 	"io/ioutil"
+	"log"
 	"os"
 
 	"time"
 
 	"strings"
 
-	"log"
-
 	"github.com/paypal/gorealis"
 	"github.com/paypal/gorealis/gen-go/apache/aurora"
 	"github.com/paypal/gorealis/response"
@@ -85,13 +84,14 @@ func main() {
 		realis.BasicAuth(username, password),
 		realis.ThriftJSON(),
 		realis.TimeoutMS(CONNECTION_TIMEOUT),
-		realis.BackOff(&realis.Backoff{
+		realis.BackOff(realis.Backoff{
 			Steps:    2,
 			Duration: 10 * time.Second,
 			Factor:   2.0,
 			Jitter:   0.1,
 		}),
 		realis.SetLogger(log.New(os.Stdout, "realis-debug: ", log.Ldate)),
+		realis.Debug(),
 	}
 
 	//check if zkUrl is available.
@@ -432,8 +432,8 @@ func main() {
 	case "pauseJobUpdate":
 		resp, err := r.PauseJobUpdate(&aurora.JobUpdateKey{
 			Job: job.JobKey(),
-			ID: updateId,
-			}, "")
+			ID:  updateId,
+		}, "")
 
 		if err != nil {
 			fmt.Println(err)
@@ -443,7 +443,7 @@ func main() {
 	case "resumeJobUpdate":
 		resp, err := r.ResumeJobUpdate(&aurora.JobUpdateKey{
 			Job: job.JobKey(),
-			ID: updateId,
+			ID:  updateId,
 		}, "")
 
 		if err != nil {
@@ -454,8 +454,8 @@ func main() {
 	case "pulseJobUpdate":
 		resp, err := r.PulseJobUpdate(&aurora.JobUpdateKey{
 			Job: job.JobKey(),
-			ID: updateId,
-			})
+			ID:  updateId,
+		})
 		if err != nil {
 			fmt.Println(err)
 		}