Issue #4166 - Agbot should avoid sending agreement update message if …

…business policy is unchanged

Signed-off-by: Le Zhang <zhangl@us.ibm.com>

agreementbot/consumer_protocol_handler.go

@@ -392,18 +392,29 @@ func (b *BaseConsumerProtocolHandler) HandlePolicyChangeForAgreement(ag persiste
 		glog.Infof(BCPHlogstring(b.Name(), fmt.Sprintf("attempting to update agreement %v due to change in policy", ag.CurrentAgreementId)))
 	}
 
+	msgPrinter := i18n.GetMessagePrinter()
+
 	svcAllPol := externalpolicy.ExternalPolicy{}
+	svcPolicyHandler := exchange.GetHTTPServicePolicyHandler(b)
+	svcResolveHandler := exchange.GetHTTPServiceDefResolverHandler(b)
 
 	for _, svcId := range ag.ServiceId {
-		if svcPol, err := exchange.GetServicePolicyWithId(b, svcId); err != nil {
-			glog.Errorf(BCPHlogstring(b.Name(), fmt.Sprintf("failed to get service policy for %v from the exchange: %v", svcId, err)))
+		if svcDef, err := exchange.GetServiceWithId(b, svcId); err != nil {
+			glog.Errorf(BCPHlogstring(b.Name(), fmt.Sprintf("failed to get service %v, error: %v", svcId, err)))
 			return false, false, false
-		} else if svcPol != nil {
-			svcAllPol.MergeWith(&svcPol.ExternalPolicy, false)
+		} else if svcDef != nil {
+			if mergedSvcPol, _, _, _, _, err := compcheck.GetServicePolicyWithDefaultProperties(svcPolicyHandler, svcResolveHandler, svcDef.URL, exchange.GetOrg(svcId), svcDef.Version, svcDef.Arch, msgPrinter); err != nil {
+				glog.Errorf(BCPHlogstring(b.Name(), fmt.Sprintf("failed to get merged service policy for %v, error: %v", svcId, err)))
+				return false, false, false
+			} else if mergedSvcPol != nil {
+				svcAllPol.MergeWith(mergedSvcPol, false)
+			}
 		}
 	}
 
-	msgPrinter := i18n.GetMessagePrinter()
+	if glog.V(5) {
+		glog.Infof(BCPHlogstring(b.Name(), fmt.Sprintf("For agreement %v merged svc policy is %v", ag.CurrentAgreementId, svcAllPol)))
+	}
 
 	busPolHandler := exchange.GetHTTPBusinessPoliciesHandler(b)
 	_, busPol, err := compcheck.GetBusinessPolicy(busPolHandler, ag.PolicyName, true, msgPrinter)
@@ -510,7 +521,7 @@ func (b *BaseConsumerProtocolHandler) HandlePolicyChangeForAgreement(ag persiste
 				}
 				return true, true, false
 			}
-			// new cluster namespace is still compatible
+			// cluster namespace remains same
 		}
 	}
 
@@ -535,6 +546,13 @@ func (b *BaseConsumerProtocolHandler) HandlePolicyChangeForAgreement(ag persiste
 		}
 	}
 
+	if same, msg := consumerPol.IsSamePolicy(oldPolicy); same {
+		glog.V(3).Infof("business policy(producerPol) %v content remains same with old policy", ag.PolicyName)
+		return true, true, true
+	} else {
+		glog.V(3).Infof("business policy %v content changed: %v", ag.PolicyName, msg)
+	}
+
 	newTsCs, err := policy.Create_Terms_And_Conditions(producerPol, consumerPol, wl, ag.CurrentAgreementId, b.config.AgreementBot.DefaultWorkloadPW, b.config.AgreementBot.NoDataIntervalS, basicprotocol.PROTOCOL_CURRENT_VERSION)
 	if err != nil {
 		glog.Errorf(BCPHlogstring(b.Name(), fmt.Sprintf("error creating new terms and conditions: %v", err)))
@@ -543,6 +561,7 @@ func (b *BaseConsumerProtocolHandler) HandlePolicyChangeForAgreement(ag persiste
 
 	ag.LastPolicyUpdateTime = uint64(time.Now().Unix())
 
+	// this function will send out "basicagreementupdate"
 	b.UpdateAgreement(&ag, basicprotocol.MsgUpdateTypePolicyChange, newTsCs, cph)
 
 	return true, true, true

compcheck/comp_check.go

@@ -1132,7 +1132,7 @@ func GetServiceAndDeps(svcUrl, svcOrg, svcVersion, svcArch string,
 		// not found, get it and dependents from the exchange
 		_, depSvcs, exchTopSvc, topId, err = getServiceResolvedDef(svcUrl, svcOrg, svcVersion, svcArch)
 		if err != nil {
-			return nil, "", nil, NewCompCheckError(fmt.Errorf(msgPrinter.Sprintf("Failed to find definition for dependent services of %s. Compatability of %s cannot be fully evaluated until all services are in the Exchange.", topId, externalpolicy.PROP_NODE_PRIVILEGED)), COMPCHECK_EXCHANGE_ERROR)
+			return nil, "", nil, NewCompCheckError(fmt.Errorf(msgPrinter.Sprintf("Failed to find definition for dependent services of %s (%s/%s/%s/%s), error: %v. Compatability of %s cannot be fully evaluated until all services are in the Exchange.", topId, svcUrl, svcOrg, svcVersion, svcArch, err, externalpolicy.PROP_NODE_PRIVILEGED)), COMPCHECK_EXCHANGE_ERROR)
 		}
 		topSvc = &ServiceDefinition{exchange.GetOrg(topId), *exchTopSvc}
 	}

exchange/service.go

@@ -687,11 +687,15 @@ func ServiceDefResolver(wURL string, wOrg string, wVersion string, wArch string,
 				// Make sure the required service has the same arch as the service.
 				// Convert version to a version range expression (if it's not already an expression) so that the underlying GetService
 				// will return us something in the range required by the service.
+				serviceVersion := sDep.Version
+				if serviceVersion == "" {
+					serviceVersion = sDep.VersionRange
+				}
 				var serviceDef *ServiceDefinition
 				if sDep.Arch != wArch {
 					return nil, nil, nil, "", errors.New(fmt.Sprintf("service %v has a different architecture than the top level service.", sDep))
-				} else if vExp, err := semanticversion.Version_Expression_Factory(sDep.Version); err != nil {
-					return nil, nil, nil, "", errors.New(fmt.Sprintf("unable to create version expression from %v, error %v", sDep.Version, err))
+				} else if vExp, err := semanticversion.Version_Expression_Factory(serviceVersion); err != nil {
+					return nil, nil, nil, "", errors.New(fmt.Sprintf("unable to create version expression from version or version range %v, error %v", serviceVersion, err))
 				} else if apiSpecs, s_map, s_def, s_id, err := ServiceDefResolver(sDep.URL, sDep.Org, vExp.Get_expression(), sDep.Arch, serviceHandler); err != nil {
 					return nil, nil, nil, "", err
 				} else {
@@ -722,6 +726,52 @@ func ServiceDefResolver(wURL string, wOrg string, wVersion string, wArch string,
 	}
 }
 
+// Retrieve the service object from the exchange. The service_id is prefixed with the org name.
+// It returns nil if there is no such service with given service_id. Service_id is in format: <org>/<Id>
+func GetServiceWithId(ec ExchangeContext, service_id string) (*ServiceDefinition, error) {
+	glog.V(3).Infof(rpclogString(fmt.Sprintf("getting service policy for %v.", service_id)))
+
+	// Get the service object. There should only be 1.
+	var resp interface{}
+	resp = new(GetServicesResponse)
+	var svc ServiceDefinition
+
+	targetURL := fmt.Sprintf("%vorgs/%v/services/%v", ec.GetExchangeURL(), GetOrg(service_id), GetId(service_id))
+
+	retryCount := ec.GetHTTPFactory().RetryCount
+	retryInterval := ec.GetHTTPFactory().GetRetryInterval()
+	for {
+		if err, tpErr := InvokeExchange(ec.GetHTTPFactory().NewHTTPClient(nil), "GET", targetURL, ec.GetExchangeId(), ec.GetExchangeToken(), nil, &resp); err != nil {
+			glog.Errorf(rpclogString(fmt.Sprintf(err.Error())))
+			return nil, err
+		} else if tpErr != nil {
+			glog.Warningf(rpclogString(fmt.Sprintf(tpErr.Error())))
+			if ec.GetHTTPFactory().RetryCount == 0 {
+				time.Sleep(time.Duration(retryInterval) * time.Second)
+				continue
+			} else if retryCount == 0 {
+				return nil, fmt.Errorf("Exceeded %v retries for error: %v", ec.GetHTTPFactory().RetryCount, tpErr)
+			} else {
+				retryCount--
+				time.Sleep(time.Duration(retryInterval) * time.Second)
+				continue
+			}
+		} else {
+			glog.V(3).Infof(rpclogString(fmt.Sprintf("returning service for %v.", service_id)))
+			services := resp.(*GetServicesResponse)
+			if len(services.Services) == 1 {
+				var cachedSvcDefs map[string]ServiceDefinition
+				svc = services.Services[service_id]
+				updateServiceDefCache(services.Services, cachedSvcDefs, GetOrg(service_id), svc.URL, svc.Arch)
+			} else {
+				glog.V(3).Infof(rpclogString(fmt.Sprintf("service %v not found.", service_id)))
+				return nil, nil
+			}
+			return &svc, nil
+		}
+	}
+}
+
 // This function gets the image docker auths for a service.
 func GetServiceDockerAuths(ec ExchangeContext, url string, org string, version string, arch string) ([]ImageDockerAuth, error) {
 

policy/policy_file.go

@@ -535,6 +535,41 @@ func (self *Policy) ShortString() string {
 	return res
 }
 
+func (self *Policy) IsSamePolicy(compare *Policy) (bool, string) {
+	misMatchString := ""
+	isSame := false
+	if compare == nil {
+		misMatchString = fmt.Sprintf("Nil policy to comapre with policy %v", self.Header)
+	} else if !self.Header.IsSame(compare.Header) {
+		misMatchString = fmt.Sprintf("Header %v mismatch with %v", self.Header, compare.Header)
+	} else if (len(compare.Workloads) == 0 || (len(compare.Workloads) != 0 && compare.Workloads[0].WorkloadURL == "")) && !self.APISpecs.IsSame(compare.APISpecs, true) {
+		misMatchString = fmt.Sprintf("API Spec %v mismatch with %v", self.APISpecs, compare.APISpecs)
+	} else if !self.AgreementProtocols.IsSame(compare.AgreementProtocols) {
+		misMatchString = fmt.Sprintf("AgreementProtocol %v mismatch with %v", self.AgreementProtocols, compare.AgreementProtocols)
+	} else if !self.IsSameWorkload(compare) {
+		misMatchString = fmt.Sprintf("Workload %v mismatch with %v", self.Workloads, compare.Workloads)
+	} else if !self.DataVerify.IsSame(compare.DataVerify) {
+		misMatchString = fmt.Sprintf("DataVerify %v mismatch with %v", self.DataVerify, compare.DataVerify)
+	} else if !self.Properties.IsSame(compare.Properties) {
+		misMatchString = fmt.Sprintf("Properties %v mismatch with %v", self.Properties, compare.Properties)
+	} else if !self.Constraints.IsSame(compare.Constraints) {
+		misMatchString = fmt.Sprintf("Constraints %v mismatch with %v", self.Constraints, compare.Constraints)
+	} else if self.RequiredWorkload != compare.RequiredWorkload {
+		misMatchString = fmt.Sprintf("RequiredWorkload %v mismatch with %v", self.RequiredWorkload, compare.RequiredWorkload)
+	} else if self.MaxAgreements != compare.MaxAgreements {
+		misMatchString = fmt.Sprintf("MaxAgreement %v mismatch with %v", self.MaxAgreements, compare.MaxAgreements)
+	} else if !UserInputArrayIsSame(self.UserInput, compare.UserInput) {
+		misMatchString = fmt.Sprintf("UserInput %v mismatch with %v", self.UserInput, compare.UserInput)
+	} else if !exchangecommon.SecretBindingIsSame(self.SecretBinding, compare.SecretBinding) {
+		misMatchString = fmt.Sprintf("SecretBinding %v mismatch with %v", self.SecretBinding, compare.SecretBinding)
+	} else {
+		isSame = true
+	}
+
+	return isSame, misMatchString
+
+}
+
 func (self *Policy) IsSameWorkload(compare *Policy) bool {
 	if len(self.Workloads) != len(compare.Workloads) {
 		return false

policy/policy_manager.go

@@ -7,7 +7,6 @@ import (
 	"github.com/golang/glog"
 	"github.com/open-horizon/anax/config"
 	"github.com/open-horizon/anax/cutil"
-	"github.com/open-horizon/anax/exchangecommon"
 	"sync"
 )
 
@@ -267,42 +266,13 @@ func (self *PolicyManager) hasPolicy(org string, matchPolicy *Policy) (bool, err
 		return false, errors.New(fmt.Sprintf("organization %v not found", org))
 	}
 
+	var isSame bool
 	for _, pol := range orgArray {
 		if errString != "" {
 			glog.V(5).Infof("Policy Manager: Previous search loop returned: %v", errString)
 		}
-		if !pol.Header.IsSame(matchPolicy.Header) {
-			errString = fmt.Sprintf("Header %v mismatch with %v", pol.Header, matchPolicy.Header)
-			continue
-		} else if (len(matchPolicy.Workloads) == 0 || (len(matchPolicy.Workloads) != 0 && matchPolicy.Workloads[0].WorkloadURL == "")) && !pol.APISpecs.IsSame(matchPolicy.APISpecs, true) {
-			errString = fmt.Sprintf("API Spec %v mismatch with %v", pol.APISpecs, matchPolicy.APISpecs)
-			continue
-		} else if !pol.AgreementProtocols.IsSame(matchPolicy.AgreementProtocols) {
-			errString = fmt.Sprintf("AgreementProtocol %v mismatch with %v", pol.AgreementProtocols, matchPolicy.AgreementProtocols)
-			continue
-		} else if !pol.IsSameWorkload(matchPolicy) {
-			errString = fmt.Sprintf("Workload %v mismatch with %v", pol.Workloads, matchPolicy.Workloads)
-			continue
-		} else if !pol.DataVerify.IsSame(matchPolicy.DataVerify) {
-			errString = fmt.Sprintf("DataVerify %v mismatch with %v", pol.DataVerify, matchPolicy.DataVerify)
-			continue
-		} else if !pol.Properties.IsSame(matchPolicy.Properties) {
-			errString = fmt.Sprintf("Properties %v mismatch with %v", pol.Properties, matchPolicy.Properties)
-			continue
-		} else if !pol.Constraints.IsSame(matchPolicy.Constraints) {
-			errString = fmt.Sprintf("Constraints %v mismatch with %v", pol.Constraints, matchPolicy.Constraints)
-			continue
-		} else if pol.RequiredWorkload != matchPolicy.RequiredWorkload {
-			errString = fmt.Sprintf("RequiredWorkload %v mismatch with %v", pol.RequiredWorkload, matchPolicy.RequiredWorkload)
-			continue
-		} else if pol.MaxAgreements != matchPolicy.MaxAgreements {
-			errString = fmt.Sprintf("MaxAgreement %v mismatch with %v", pol.MaxAgreements, matchPolicy.MaxAgreements)
-			continue
-		} else if !UserInputArrayIsSame(pol.UserInput, matchPolicy.UserInput) {
-			errString = fmt.Sprintf("UserInput %v mismatch with %v", pol.UserInput, matchPolicy.UserInput)
-			continue
-		} else if !exchangecommon.SecretBindingIsSame(pol.SecretBinding, matchPolicy.SecretBinding) {
-			errString = fmt.Sprintf("SecretBinding %v mismatch with %v", pol.SecretBinding, matchPolicy.SecretBinding)
+
+		if isSame, errString = pol.IsSamePolicy(matchPolicy); !isSame {
 			continue
 		} else {
 			errString = ""