[FAB-9684] Replace runningChaincodes

HandlerRegistry is used to track handlers based on the canonical name of
the chaincode. In addition to tracking handlers, it helps encapsulate
the launch and registration protocol.

Change-Id: I8013fca1dffa0d4a1cc28c6992fef5f51768a482
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>

core/chaincode/ccproviderimpl.go

@@ -54,8 +54,6 @@ type ccProviderImpl struct {
 	cs *ChaincodeSupport
 }
 
-var _ ccprovider.ChaincodeProvider = &ccProviderImpl{}
-
 // ccProviderContextImpl contains the state that is passed around to calls to methods of ccProviderImpl
 type ccProviderContextImpl struct {
 	ctx *ccprovider.CCContext

core/chaincode/chaincode_suite_test.go

@@ -49,3 +49,13 @@ type certGenerator interface {
 type processor interface {
 	Processor
 }
+
+// Helpers to access unexported state.
+
+func SetHandlerTxContexts(h *Handler, txContexts *TransactionContexts) {
+	h.txCtxs = txContexts
+}
+
+func InitializeQueryContext(h *Handler, txContext *TransactionContext, queryID string, resultsIterator commonledger.ResultsIterator) {
+	h.initializeQueryContext(txContext, queryID, resultsIterator)
+}