[FAB-3528] peer/channel package not using logging

In peer/channel  package replaced "fmt.Println"

and "fmt.Printf" with  proper logging for files

channel.go
deliverclient.go
join.go
list.go

Change-Id: I820cc977e6745e4e9ce4f66e9d32f2cf6598bc58
Signed-off-by: Dinesh Kumar <dinesh.kumar@itpeoplecorp.com>

peer/channel/channel.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/hyperledger/fabric/common/flogging"
 	"github.com/hyperledger/fabric/msp"
 	"github.com/hyperledger/fabric/peer/common"
 	ab "github.com/hyperledger/fabric/protos/orderer"
@@ -36,6 +37,8 @@ const (
 	longDes         = "Operate a channel: create|fetch|update|join|list."
 )
 
+var logger = flogging.MustGetLogger("channelCmd")
+
 type OrdererRequirement bool
 type EndorserRequirement bool
 
@@ -151,12 +154,11 @@ func InitCmdFactory(isEndorserRequired EndorserRequirement, isOrdererRequired Or
 
 		client, err := ab.NewAtomicBroadcastClient(conn).Deliver(context.TODO())
 		if err != nil {
-			fmt.Println("Error connecting:", err)
-			return nil, err
+			return nil, fmt.Errorf("Error connecting due to  %s", err)
 		}
 
 		cmdFact.DeliverClient = newDeliverClient(conn, client, chainID)
 	}
-
+	logger.Infof("Endorser and orderer connections initialized")
 	return cmdFact, nil
 }

peer/channel/deliverclient.go

@@ -56,7 +56,7 @@ func seekHelper(chainID string, position *ab.SeekPosition) *common.Envelope {
 	epoch := uint64(0)
 	env, err := utils.CreateSignedEnvelope(common.HeaderType_CONFIG_UPDATE, chainID, localmsp.NewSigner(), seekInfo, msgVersion, epoch)
 	if err != nil {
-		fmt.Printf("Error signing envelope %s\n", err)
+		logger.Errorf("Error signing envelope:  %s", err)
 		return nil
 	}
 	return env
@@ -77,16 +77,15 @@ func (r *deliverClient) seekNewest() error {
 func (r *deliverClient) readBlock() (*common.Block, error) {
 	msg, err := r.client.Recv()
 	if err != nil {
-		fmt.Println("Error receiving:", err)
-		return nil, err
+		return nil, fmt.Errorf("Error receiving: %s", err)
 	}
 
 	switch t := msg.Type.(type) {
 	case *ab.DeliverResponse_Status:
-		fmt.Println("Got status ", t)
+		logger.Debugf("Got status:%T ", t)
 		return nil, fmt.Errorf("can't read the block")
 	case *ab.DeliverResponse_Block:
-		fmt.Println("Received block: ", t.Block.Header.Number)
+		logger.Debugf("Received block:%v ", t.Block.Header.Number)
 		r.client.Recv() // Flush the success message
 		return t.Block, nil
 	default:
@@ -97,7 +96,7 @@ func (r *deliverClient) readBlock() (*common.Block, error) {
 func (r *deliverClient) getSpecifiedBlock(num uint64) (*common.Block, error) {
 	err := r.seekSpecified(num)
 	if err != nil {
-		fmt.Println("Received error:", err)
+		logger.Errorf("Received error: %s", err)
 		return nil, err
 	}
 
@@ -107,8 +106,7 @@ func (r *deliverClient) getSpecifiedBlock(num uint64) (*common.Block, error) {
 func (r *deliverClient) getOldestBlock() (*common.Block, error) {
 	err := r.seekOldest()
 	if err != nil {
-		fmt.Println("Received error:", err)
-		return nil, err
+		return nil, fmt.Errorf("Received error: %s ", err)
 	}
 
 	return r.readBlock()
@@ -117,7 +115,7 @@ func (r *deliverClient) getOldestBlock() (*common.Block, error) {
 func (r *deliverClient) getNewestBlock() (*common.Block, error) {
 	err := r.seekNewest()
 	if err != nil {
-		fmt.Println("Received error:", err)
+		logger.Errorf("Received error: %s", err)
 		return nil, err
 	}
 

peer/channel/join.go

@@ -60,14 +60,13 @@ func (e ProposalFailedErr) Error() string {
 
 func getJoinCCSpec() (*pb.ChaincodeSpec, error) {
 	if genesisBlockPath == common.UndefinedParamValue {
-		return nil, errors.New("Must supply genesis block file.")
+		return nil, errors.New("Must supply genesis block file")
 	}
 
 	gb, err := ioutil.ReadFile(genesisBlockPath)
 	if err != nil {
 		return nil, GBFileNotFoundErr(err.Error())
 	}
-
 	// Build the spec
 	input := &pb.ChaincodeInput{Args: [][]byte{[]byte(cscc.JoinChain), gb}}
 
@@ -119,9 +118,7 @@ func executeJoin(cf *ChannelCmdFactory) (err error) {
 	if proposalResp.Response.Status != 0 && proposalResp.Response.Status != 200 {
 		return ProposalFailedErr(fmt.Sprintf("bad proposal response %d", proposalResp.Response.Status))
 	}
-
-	fmt.Println("Peer joined the channel!")
-
+	logger.Infof("Peer joined the channel!")
 	return nil
 }
 

peer/channel/list.go

@@ -102,9 +102,10 @@ func list(cf *ChannelCmdFactory) error {
 	if channels, err := client.getChannels(); err != nil {
 		return err
 	} else {
-		fmt.Println("Channels peers has joined to:")
+		logger.Infof("Channels peers has joined to: ")
+
 		for _, channel := range channels {
-			fmt.Println("\t", channel.ChannelId)
+			logger.Infof("%s ", channel.ChannelId)
 		}
 	}