[FAB-6523] Bump Fabric version

Change-Id: I862909bd91a746b5b6476ca6bd4fa70dcebe4082
Signed-off-by: Troy Ronda <troy@troyronda.com>

Author: troyronda

Makefile

@@ -65,7 +65,7 @@ FABRIC_DEV_REGISTRY_PRE_CMD ?= docker login -u docker -p docker nexus3.hyperledg
 THIRDPARTY_FABRIC_CA_BRANCH ?= master
 THIRDPARTY_FABRIC_CA_COMMIT ?= v1.1.0-preview
 THIRDPARTY_FABRIC_BRANCH    ?= master
-THIRDPARTY_FABRIC_COMMIT    ?= d783a0d569a155543c2e268cd14fad2d8aef34e9
+THIRDPARTY_FABRIC_COMMIT    ?= 4a0d55122fd5c2eef543ed5bd41c32f2b4cdb520
 
 # Force removal of images in cleanup (overridable)
 FIXTURE_DOCKER_REMOVE_FORCE ?= false

internal/github.com/hyperledger/fabric/common/util/utils.go

@@ -80,3 +80,5 @@ func ConcatenateBytes(data ...[]byte) []byte {
 	}
 	return result
 }
+
+const DELIMITER = "."

internal/github.com/hyperledger/fabric/core/ledger/ledger_interface.go

@@ -30,6 +30,7 @@ import (
 
 // PeerLedgerProvider provides handle to ledger instances
 type PeerLedgerProvider interface {
+	Initialize(statelisteners StateListeners)
 	// Create creates a new ledger with the given genesis block.
 	// This function guarantees that the creation of ledger and committing the genesis block would an atomic action
 	// The chain id retrieved from the genesis block is treated as a ledger id
@@ -269,3 +270,24 @@ func (txSim *TxSimulationResults) GetPvtSimulationBytes() ([]byte, error) {
 func (txSim *TxSimulationResults) ContainsPvtWrites() bool {
 	return txSim.PvtSimulationResults != nil
 }
+
+// StateListener allows a custom code for performing additional stuff upon state change
+// for a perticular namespace against which the listener is registered.
+// This helps to perform custom tasks other than the state updates.
+// A ledger implemetation is expected to invoke Function `HandleStateUpdates` once per block and
+// the `stateUpdates` parameter passed to the function captures the state changes caused by the block
+// for the namespace. The actual data type of stateUpdates depends on the data model enabled.
+// For instance, for KV data model, the actual type would be proto message
+// `github.com/hyperledger/fabric/protos/ledger/rwset/kvrwset.KVWrite`
+// Function `HandleStateUpdates` is expected to be invoked before block is committed and if this
+// function returns an error, the ledger implementation is expected to halt block commit operation
+// and result in a panic
+type StateListener interface {
+	HandleStateUpdates(ledgerID string, stateUpdates StateUpdates) error
+}
+
+// StateUpdates is the generic type to represent the state updates
+type StateUpdates interface{}
+
+// StateListeners maintains the association between a namespace to its corresponding listener
+type StateListeners map[string]StateListener