[FAB-6228] add implementation of ChaincodeByName

This change set introduces the proper implementation for the ChaincodeByName
function exposed by the Support interface for the endorser.

Change-Id: If70b5e8171a4cffcbbd941220994f477fe5e4b0c
Signed-off-by: Alessandro Sorniotti <ale.linux@sopit.net>

core/peer/peer.go

@@ -450,6 +450,17 @@ func GetLedger(cid string) ledger.PeerLedger {
 	return nil
 }
 
+// GetResourcesConfig returns the resources configuration of the chain with channel ID. Note that this
+// call returns nil if chain cid has not been created.
+func GetResourcesConfig(cid string) resourcesconfig.Resources {
+	chains.RLock()
+	defer chains.RUnlock()
+	if c, ok := chains.list[cid]; ok {
+		return c.cs.bundleSource.StableBundle()
+	}
+	return nil
+}
+
 // GetChannelConfig returns the channel configuration of the chain with channel ID. Note that this
 // call returns nil if chain cid has not been created.
 func GetChannelConfig(cid string) channelconfig.Resources {

core/peer/support.go

@@ -43,8 +43,12 @@ func (s *supportImpl) GetApplicationConfig(cid string) (channelconfig.Applicatio
 }
 
 func (s *supportImpl) ChaincodeByName(chainname, ccname string) (resourcesconfig.ChaincodeDefinition, bool) {
-	// FIXME: implement me properly
-	return nil, false
+	rc := GetResourcesConfig(chainname)
+	if rc == nil {
+		return nil, false
+	}
+
+	return rc.ChaincodeRegistry().ChaincodeByName(ccname)
 }
 
 type SupportFactoryImpl struct {