Expose ChainID for orderer common components

The orderer components have been being slowly transformed to accomodate
multiple chain IDs.  However, in order to utilize these components in a
true multi-chain system, their external APIs must expose their backing
chain IDs.

This changeset adds simple Getters for the chain ids associated with the
configuration manager and the rawledgers.

Change-Id: I5d2ad4f88975cd271b69f8aa38225c68499c18f2
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

orderer/common/blockcutter/blockcutter_test.go

@@ -42,6 +42,10 @@ func (mcm *mockConfigManager) Apply(message *cb.ConfigurationEnvelope) error {
 	panic("Unimplemented")
 }
 
+func (mcm *mockConfigManager) ChainID() []byte {
+	panic("Unimplemented")
+}
+
 type mockConfigFilter struct {
 	manager configtx.Manager
 }

orderer/common/broadcast/broadcast_test.go

@@ -57,6 +57,10 @@ func (mcm *mockConfigManager) Apply(message *cb.ConfigurationEnvelope) error {
 	return mcm.applyErr
 }
 
+func (mcm *mockConfigManager) ChainID() []byte {
+	panic("Unimplemented")
+}
+
 type mockConfigFilter struct {
 	manager configtx.Manager
 }

orderer/common/broadcastfilter/configfilter/configfilter_test.go

@@ -38,6 +38,10 @@ func (mcm *mockConfigManager) Apply(configtx *cb.ConfigurationEnvelope) error {
 	return mcm.err
 }
 
+func (mcm *mockConfigManager) ChainID() []byte {
+	panic("Unimplemented")
+}
+
 func TestForwardNonConfig(t *testing.T) {
 	cf := New(&mockConfigManager{})
 	result := cf.Apply(&cb.Envelope{

orderer/common/configtx/configtx.go

@@ -48,6 +48,9 @@ type Manager interface {
 
 	// Validate attempts to validate a new configtx against the current config state
 	Validate(configtx *cb.ConfigurationEnvelope) error
+
+	// ChainID retrieves the chain ID associated with this manager
+	ChainID() []byte
 }
 
 // DefaultModificationPolicyID is the ID of the policy used when no other policy can be resolved, for instance when attempting to create a new config item
@@ -81,7 +84,7 @@ func computeChainIDAndSequence(configtx *cb.ConfigurationEnvelope) ([]byte, uint
 		item := &cb.ConfigurationItem{}
 		err := proto.Unmarshal(signedItem.ConfigurationItem, item)
 		if err != nil {
-			return nil, 0, err
+			return nil, 0, fmt.Errorf("Error unmarshaling signedItem.ConfigurationItem: %s", err)
 		}
 
 		if item.LastModified > m {
@@ -295,3 +298,8 @@ func (cm *configurationManager) Apply(configtx *cb.ConfigurationEnvelope) error
 	cm.commitHandlers()
 	return nil
 }
+
+// ChainID retrieves the chain ID associated with this manager
+func (cm *configurationManager) ChainID() []byte {
+	return cm.chainID
+}

orderer/rawledger/fileledger/fileledger.go

@@ -110,6 +110,20 @@ func New(directory string, systemGenesis *cb.Block) (rawledger.Factory, rawledge
 	return flf, fl
 }
 
+func (flf *fileLedgerFactory) ChainIDs() [][]byte {
+	flf.mutex.Lock()
+	defer flf.mutex.Unlock()
+	ids := make([][]byte, len(flf.ledgers))
+
+	i := 0
+	for key := range flf.ledgers {
+		ids[i] = []byte(key)
+		i++
+	}
+
+	return ids
+}
+
 func (flf *fileLedgerFactory) GetOrCreate(chainID []byte) (rawledger.ReadWriter, error) {
 	flf.mutex.Lock()
 	defer flf.mutex.Unlock()

orderer/rawledger/ramledger/ramledger.go

@@ -95,6 +95,20 @@ func (rlf *ramLedgerFactory) GetOrCreate(chainID []byte) (rawledger.ReadWriter,
 	return ch, nil
 }
 
+func (rlf *ramLedgerFactory) ChainIDs() [][]byte {
+	rlf.mutex.Lock()
+	defer rlf.mutex.Unlock()
+	ids := make([][]byte, len(rlf.ledgers))
+
+	i := 0
+	for key := range rlf.ledgers {
+		ids[i] = []byte(key)
+		i++
+	}
+
+	return ids
+}
+
 // newChain creates a new instance of the ram ledger for a chain
 func newChain(maxSize int) rawledger.ReadWriter {
 	preGenesis := &cb.Block{
@@ -145,6 +159,7 @@ func (rl *ramLedger) Iterator(startType ab.SeekInfo_StartType, specified uint64)
 		oldest := rl.oldest
 		// Note the two +1's here is to accomodate the 'preGenesis' block of ^uint64(0)
 		if specified+1 < oldest.block.Header.Number+1 || specified > rl.newest.block.Header.Number+1 {
+			logger.Debugf("Returning error iterator because specified seek was %d with oldest %d and newest %d", specified, rl.oldest.block.Header.Number, rl.newest.block.Header.Number)
 			return &rawledger.NotFoundErrorIterator{}, 0
 		}
 

orderer/rawledger/rawledger.go

@@ -25,6 +25,9 @@ import (
 type Factory interface {
 	// GetOrCreate gets an existing ledger (if it exists) or creates it if it does not
 	GetOrCreate(chainID []byte) (ReadWriter, error)
+
+	// ChainIDs returns the chain IDs the Factory is aware of
+	ChainIDs() [][]byte
 }
 
 // Iterator is useful for a chain Reader to stream blocks as they are created

orderer/solo/consensus_test.go

@@ -52,6 +52,10 @@ func (mcm *mockConfigManager) Apply(message *cb.ConfigurationEnvelope) error {
 	return mcm.applyErr
 }
 
+func (mcm *mockConfigManager) ChainID() []byte {
+	panic("Unimplemented")
+}
+
 type mockConfigFilter struct {
 	manager configtx.Manager
 }