[FAB-8660] Operations and PeerSupport interfaces

This introduces an interface that represents the currently exported
functions of the peer. An instance of the interface is created during
package initialization which delegates to the existing functions.

- References to the peer functions in endorser.Support are replaced with a
  reference to the peer singleton.
- CreatePeerServer is renamed to the more idiomatic NewPeerServer as it
  is a constructor
- PeerSupportFactory is removed and an instance of PeerSupport is
  provided to endorser.SupportImpl and scc.ProviderFactory

Change-Id: I07ae90092be8349bed60686f7b04a5b9ab02382a
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>

core/chaincode/chaincode_support_test.go

@@ -32,6 +32,7 @@ import (
 	"github.com/hyperledger/fabric/core/chaincode/accesscontrol"
 	"github.com/hyperledger/fabric/core/chaincode/shim"
 	"github.com/hyperledger/fabric/core/common/ccprovider"
+	"github.com/hyperledger/fabric/core/common/sysccprovider"
 	"github.com/hyperledger/fabric/core/config"
 	"github.com/hyperledger/fabric/core/container"
 	"github.com/hyperledger/fabric/core/ledger"
@@ -144,7 +145,9 @@ func initMockPeer(chainIDs ...string) error {
 		GetApplicationConfigRv:     &mc.MockApplication{&mc.MockApplicationCapabilities{}},
 		GetApplicationConfigBoolRv: true,
 	}
-	peer.RegisterSupportFactory(&cmp.MockSupportFactoryImpl{msi})
+	sysccprovider.RegisterSystemChaincodeProviderFactory(
+		&scc.ProviderFactory{Peer: peer.Default, PeerSupport: msi},
+	)
 
 	mockAclProvider = &mocks.MockACLProvider{}
 	mockAclProvider.Reset()

core/endorser/endorser.go

@@ -538,3 +538,13 @@ func (e *Endorser) ProcessProposal(ctx context.Context, signedProp *pb.SignedPro
 
 	return pResp, nil
 }
+
+// shorttxid replicates the chaincode package function to shorten txids.
+// ~~TODO utilize a common shorttxid utility across packages.~~
+// TODO use a formal type for transaction ID and make it a stringer
+func shorttxid(txid string) string {
+	if len(txid) < 8 {
+		return txid
+	}
+	return txid[0:8]
+}

core/endorser/support.go

@@ -26,7 +26,10 @@ import (
 
 // SupportImpl provides an implementation of the endorser.Support interface
 // issuing calls to various static methods of the peer
-type SupportImpl struct{}
+type SupportImpl struct {
+	Peer        peer.Operations
+	PeerSupport peer.Support
+}
 
 // IsSysCCAndNotInvokableExternal returns true if the supplied chaincode is
 // ia system chaincode and it NOT invokable
@@ -38,7 +41,7 @@ func (s *SupportImpl) IsSysCCAndNotInvokableExternal(name string) bool {
 // a client may obtain more than one such simulator; they are made unique
 // by way of the supplied txid
 func (s *SupportImpl) GetTxSimulator(ledgername string, txid string) (ledger.TxSimulator, error) {
-	lgr := peer.GetLedger(ledgername)
+	lgr := s.Peer.GetLedger(ledgername)
 	if lgr == nil {
 		return nil, errors.Errorf("channel does not exist: %s", ledgername)
 	}
@@ -48,7 +51,7 @@ func (s *SupportImpl) GetTxSimulator(ledgername string, txid string) (ledger.TxS
 // GetHistoryQueryExecutor gives handle to a history query executor for the
 // specified ledger
 func (s *SupportImpl) GetHistoryQueryExecutor(ledgername string) (ledger.HistoryQueryExecutor, error) {
-	lgr := peer.GetLedger(ledgername)
+	lgr := s.Peer.GetLedger(ledgername)
 	if lgr == nil {
 		return nil, errors.Errorf("channel does not exist: %s", ledgername)
 	}
@@ -57,7 +60,7 @@ func (s *SupportImpl) GetHistoryQueryExecutor(ledgername string) (ledger.History
 
 // GetTransactionByID retrieves a transaction by id
 func (s *SupportImpl) GetTransactionByID(chid, txID string) (*pb.ProcessedTransaction, error) {
-	lgr := peer.GetLedger(chid)
+	lgr := s.Peer.GetLedger(chid)
 	if lgr == nil {
 		return nil, errors.Errorf("failed to look up the ledger for channel %s", chid)
 	}
@@ -68,13 +71,13 @@ func (s *SupportImpl) GetTransactionByID(chid, txID string) (*pb.ProcessedTransa
 	return tx, nil
 }
 
-//IsSysCC returns true if the name matches a system chaincode's
-//system chaincode names are system, chain wide
+// IsSysCC returns true if the name matches a system chaincode's
+// system chaincode names are system, chain wide
 func (s *SupportImpl) IsSysCC(name string) bool {
 	return scc.IsSysCC(name)
 }
 
-//Execute - execute proposal, return original response of chaincode
+// Execute a proposal and return the chaincode response
 func (s *SupportImpl) Execute(ctxt context.Context, cid, name, version, txid string, syscc bool, signedProp *pb.SignedProposal, prop *pb.Proposal, spec interface{}) (*pb.Response, *pb.ChaincodeEvent, error) {
 	cccid := ccprovider.NewCCContext(cid, name, version, txid, syscc, signedProp, prop)
 
@@ -105,8 +108,8 @@ func (s *SupportImpl) GetChaincodeDefinition(ctx context.Context, chainID string
 	return chaincode.GetChaincodeDefinition(ctxt, txid, signedProp, prop, chainID, chaincodeID)
 }
 
-//CheckACL checks the ACL for the resource for the channel using the
-//SignedProposal from which an id can be extracted for testing against a policy
+// CheckACL checks the ACL for the resource for the channel using the
+// SignedProposal from which an id can be extracted for testing against a policy
 func (s *SupportImpl) CheckACL(signedProp *pb.SignedProposal, chdr *common.ChannelHeader, shdr *common.SignatureHeader, hdrext *pb.ChaincodeHeaderExtension) error {
 	return aclmgmt.GetACLProvider().CheckACL(resources.PROPOSE, chdr.ChannelId, signedProp)
 }
@@ -132,14 +135,5 @@ func (s *SupportImpl) CheckInstantiationPolicy(name, version string, cd resource
 // GetApplicationConfig returns the configtxapplication.SharedConfig for the channel
 // and whether the Application config exists
 func (s *SupportImpl) GetApplicationConfig(cid string) (channelconfig.Application, bool) {
-	return peer.GetSupport().GetApplicationConfig(cid)
-}
-
-// shorttxid replicates the chaincode package function to shorten txids.
-// TODO utilize a common shorttxid utility across packages.
-func shorttxid(txid string) string {
-	if len(txid) < 8 {
-		return txid
-	}
-	return txid[0:8]
+	return s.PeerSupport.GetApplicationConfig(cid)
 }

core/peer/peer.go

@@ -505,7 +505,7 @@ func updateTrustedRoots(cm channelconfig.Resources) {
 			trustedRoots = append(trustedRoots, serverConfig.SecOpts.ServerRootCAs...)
 		}
 
-		server := GetPeerServer()
+		server := peerServer
 		// now update the client roots for the peerServer
 		if server != nil {
 			err := server.SetClientRootCAs(trustedRoots)
@@ -675,11 +675,9 @@ func (c *channelPolicyManagerGetter) Manager(channelID string) (policies.Manager
 	return policyManager, policyManager != nil
 }
 
-// CreatePeerServer creates an instance of comm.GRPCServer
+// NewPeerServer creates an instance of comm.GRPCServer
 // This server is used for peer communications
-func CreatePeerServer(listenAddress string,
-	serverConfig comm.ServerConfig) (comm.GRPCServer, error) {
-
+func NewPeerServer(listenAddress string, serverConfig comm.ServerConfig) (comm.GRPCServer, error) {
 	var err error
 	peerServer, err = comm.NewGRPCServer(listenAddress, serverConfig)
 	if err != nil {
@@ -689,11 +687,6 @@ func CreatePeerServer(listenAddress string,
 	return peerServer, nil
 }
 
-// GetPeerServer returns the peer server instance
-func GetPeerServer() comm.GRPCServer {
-	return peerServer
-}
-
 type collectionSupport struct {
 	ledger.PeerLedger
 }

core/peer/peer_impl.go

@@ -0,0 +1,77 @@
+//
+// Copyright IBM Corp. All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package peer
+
+import (
+	"github.com/hyperledger/fabric/common/channelconfig"
+	"github.com/hyperledger/fabric/common/policies"
+	"github.com/hyperledger/fabric/common/resourcesconfig"
+	"github.com/hyperledger/fabric/core/ledger"
+	"github.com/hyperledger/fabric/protos/common"
+	pb "github.com/hyperledger/fabric/protos/peer"
+)
+
+// Operations exposes an interface to the package level functions that operated
+// on singletons in the package. This is a step towards moving from package
+// level data for the peer to instance level data.
+type Operations interface {
+	CreateChainFromBlock(cb *common.Block) error
+	GetChannelConfig(cid string) channelconfig.Resources
+	GetChannelsInfo() []*pb.ChannelInfo
+	GetCurrConfigBlock(cid string) *common.Block
+	GetLedger(cid string) ledger.PeerLedger
+	GetMSPIDs(cid string) []string
+	GetPolicyManager(cid string) policies.Manager
+	GetResourcesConfig(cid string) resourcesconfig.Resources
+	InitChain(cid string)
+	Initialize(init func(string))
+}
+
+type peerImpl struct {
+	createChainFromBlock func(cb *common.Block) error
+	getChannelConfig     func(cid string) channelconfig.Resources
+	getChannelsInfo      func() []*pb.ChannelInfo
+	getCurrConfigBlock   func(cid string) *common.Block
+	getLedger            func(cid string) ledger.PeerLedger
+	getMSPIDs            func(cid string) []string
+	getPolicyManager     func(cid string) policies.Manager
+	getResourcesConfig   func(cid string) resourcesconfig.Resources
+	initChain            func(cid string)
+	initialize           func(init func(string))
+}
+
+// Default provides in implementation of the Peer interface that provides
+// access to the package level state.
+var Default Operations = &peerImpl{
+	createChainFromBlock: CreateChainFromBlock,
+	getChannelConfig:     GetChannelConfig,
+	getChannelsInfo:      GetChannelsInfo,
+	getCurrConfigBlock:   GetCurrConfigBlock,
+	getLedger:            GetLedger,
+	getMSPIDs:            GetMSPIDs,
+	getPolicyManager:     GetPolicyManager,
+	getResourcesConfig:   GetResourcesConfig,
+	initChain:            InitChain,
+	initialize:           Initialize,
+}
+
+var DefaultSupport Support = &supportImpl{operations: Default}
+
+func (p *peerImpl) CreateChainFromBlock(cb *common.Block) error { return p.createChainFromBlock(cb) }
+func (p *peerImpl) GetChannelConfig(cid string) channelconfig.Resources {
+	return p.getChannelConfig(cid)
+}
+func (p *peerImpl) GetChannelsInfo() []*pb.ChannelInfo           { return p.getChannelsInfo() }
+func (p *peerImpl) GetCurrConfigBlock(cid string) *common.Block  { return p.getCurrConfigBlock(cid) }
+func (p *peerImpl) GetLedger(cid string) ledger.PeerLedger       { return p.getLedger(cid) }
+func (p *peerImpl) GetMSPIDs(cid string) []string                { return p.getMSPIDs(cid) }
+func (p *peerImpl) GetPolicyManager(cid string) policies.Manager { return p.getPolicyManager(cid) }
+func (p *peerImpl) GetResourcesConfig(cid string) resourcesconfig.Resources {
+	return p.getResourcesConfig(cid)
+}
+func (p *peerImpl) InitChain(cid string)         { p.initChain(cid) }
+func (p *peerImpl) Initialize(init func(string)) { p.initialize(init) }

core/peer/peer_test.go

@@ -29,6 +29,7 @@ import (
 	"github.com/hyperledger/fabric/peer/gossip/mocks"
 	"github.com/spf13/viper"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc"
 )
 
@@ -53,7 +54,6 @@ func (ds *mockDeliveryClient) StopDeliverForChannel(chainID string) error {
 
 // Stop terminates delivery service and closes the connection
 func (*mockDeliveryClient) Stop() {
-
 }
 
 type mockDeliveryClientFactory struct {
@@ -63,21 +63,17 @@ func (*mockDeliveryClientFactory) Service(g service.GossipService, endpoints []s
 	return &mockDeliveryClient{}, nil
 }
 
-func TestCreatePeerServer(t *testing.T) {
-
-	server, err := CreatePeerServer(":4050", comm.ServerConfig{})
-	assert.NoError(t, err, "CreatePeerServer returned unexpected error")
-	assert.Equal(t, "[::]:4050", server.Address(),
-		"CreatePeerServer returned the wrong address")
+func TestNewPeerServer(t *testing.T) {
+	server, err := NewPeerServer(":4050", comm.ServerConfig{})
+	assert.NoError(t, err, "NewPeerServer returned unexpected error")
+	assert.Equal(t, "[::]:4050", server.Address(), "NewPeerServer returned the wrong address")
 	server.Stop()
 
-	_, err = CreatePeerServer("", comm.ServerConfig{})
-	assert.Error(t, err, "expected CreatePeerServer to return error with missing address")
-
+	_, err = NewPeerServer("", comm.ServerConfig{})
+	assert.Error(t, err, "expected NewPeerServer to return error with missing address")
 }
 
 func TestInitChain(t *testing.T) {
-
 	chainId := "testChain"
 	chainInitializer = func(cid string) {
 		assert.Equal(t, chainId, cid, "chainInitializer received unexpected cid")
@@ -108,7 +104,7 @@ func TestCreateChainFromBlock(t *testing.T) {
 	// Initialize gossip service
 	grpcServer := grpc.NewServer()
 	socket, err := net.Listen("tcp", fmt.Sprintf("%s:%d", "", 13611))
-	assert.NoError(t, err)
+	require.NoError(t, err)
 
 	msptesttools.LoadMSPSetupForTesting()
 

core/peer/pkg_test.go

@@ -167,11 +167,11 @@ func TestUpdateRootsFromConfigBlock(t *testing.T) {
 			"Org1-cert.pem"))
 		viper.Set("peer.fileSystemPath", "/var/hyperledger/test/")
 		defer os.RemoveAll("/var/hyperledger/test/")
-		err := peer.CreateChainFromBlock(block)
+		err := peer.Default.CreateChainFromBlock(block)
 		if err != nil {
 			t.Fatalf("Failed to create config block (%s)", err)
 		}
-		t.Logf("Channel %s MSPIDs: (%s)", cid, peer.GetMSPIDs(cid))
+		t.Logf("Channel %s MSPIDs: (%s)", cid, peer.Default.GetMSPIDs(cid))
 	}
 
 	org1CertPool, err := createCertPool([][]byte{org1CA})
@@ -292,14 +292,12 @@ func TestUpdateRootsFromConfigBlock(t *testing.T) {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
 			t.Logf("Running test %s ...", test.name)
-			_, err := peer.CreatePeerServer(test.listenAddress, test.serverConfig)
+			server, err := peer.NewPeerServer(test.listenAddress, test.serverConfig)
 			if err != nil {
-				t.Fatalf("CreatePeerServer failed with error [%s]", err)
+				t.Fatalf("NewPeerServer failed with error [%s]", err)
 			} else {
-				assert.NoError(t, err, "CreatePeerServer should not have returned an error")
-				// get the server from peer
-				server := peer.GetPeerServer()
-				assert.NotNil(t, server, "GetPeerServer should not return a nil value")
+				assert.NoError(t, err, "NewPeerServer should not have returned an error")
+				assert.NotNil(t, server, "NewPeerServer should have created a server")
 				// register a GRPC test service
 				testpb.RegisterTestServiceServer(server.Server(), &testServiceServer{})
 				go server.Start()

core/peer/support.go

@@ -31,10 +31,11 @@ type Support interface {
 }
 
 type supportImpl struct {
+	operations Operations
 }
 
 func (s *supportImpl) GetApplicationConfig(cid string) (channelconfig.Application, bool) {
-	cc := GetChannelConfig(cid)
+	cc := s.operations.GetChannelConfig(cid)
 	if cc == nil {
 		return nil, false
 	}
@@ -43,38 +44,10 @@ func (s *supportImpl) GetApplicationConfig(cid string) (channelconfig.Applicatio
 }
 
 func (s *supportImpl) ChaincodeByName(chainname, ccname string) (resourcesconfig.ChaincodeDefinition, bool) {
-	rc := GetResourcesConfig(chainname)
+	rc := s.operations.GetResourcesConfig(chainname)
 	if rc == nil {
 		return nil, false
 	}
 
 	return rc.ChaincodeRegistry().ChaincodeByName(ccname)
 }
-
-type SupportFactoryImpl struct {
-}
-
-func (c *SupportFactoryImpl) NewSupport() Support {
-	return &supportImpl{}
-}
-
-// RegisterSupportFactory should be called to specify
-// which factory should be used to serve GetSupport calls
-func RegisterSupportFactory(ccfact SupportFactory) {
-	supportFactory = ccfact
-}
-
-// GetSupport returns a new Support instance by calling the factory
-func GetSupport() Support {
-	if supportFactory == nil {
-		panic("The factory must be set first via RegisterSupportFactory")
-	}
-	return supportFactory.NewSupport()
-}
-
-// init is called when this package is loaded; this way by default,
-// all calls to GetSupport will be satisfied by SupportFactoryImpl,
-// unless RegisterSupportFactory is called again
-func init() {
-	RegisterSupportFactory(&SupportFactoryImpl{})
-}