public Object run() throws Exception {         } catch (PrivilegedActionException e) {             if (e.getCause() != null && e.getCause().getCause() != null && e.getCause().getCause() instanceof                     UserStoreException) {-                if (((UserStoreException) e.getCause().getCause()).getErrorCode() != null) {-                    throw new UserStoreException(e.getCause().getCause().getMessage(),-                            ((UserStoreException) e.getCause().getCause()).getErrorCode(), e);+                boolean isClientException = e.getCause().getCause() instanceof UserStoreClientException;+                String errorCode = ((UserStoreException) e.getCause().getCause()).getErrorCode();+                String errorMessage = e.getCause().getCause().getMessage();+                // If the error codes are available send the error codes as well.+                if (StringUtils.isNotBlank(errorCode)) {

 public Object run() throws Exception {         } catch (PrivilegedActionException e) {             if (e.getCause() != null && e.getCause().getCause() != null && e.getCause().getCause() instanceof                     UserStoreException) {-                if (((UserStoreException) e.getCause().getCause()).getErrorCode() != null) {-                    throw new UserStoreException(e.getCause().getCause().getMessage(),-                            ((UserStoreException) e.getCause().getCause()).getErrorCode(), e);+                boolean isClientException = e.getCause().getCause() instanceof UserStoreClientException;+                String errorCode = ((UserStoreException) e.getCause().getCause()).getErrorCode();+                String errorMessage = e.getCause().getCause().getMessage();+                // If the error codes are available send the error codes as well.+                if (StringUtils.isNotBlank(errorCode)) {

+/*+ *  Copyright (c) 2021, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.+ *+ *  Licensed under the Apache License, Version 2.0 (the "License");+ *  you may not use this file except in compliance with the License.+ *  You may obtain a copy of the License at+ *+ *  http://www.apache.org/licenses/LICENSE-2.0+ *+ *  Unless required by applicable law or agreed to in writing, software+ *  distributed under the License is distributed on an "AS IS" BASIS,+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.+ *  See the License for the specific language governing permissions and+ *  limitations under the License.+ *+ */++package xds++import (+	"fmt"+	"math/rand"+	"time"++	corev3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"+	"github.com/envoyproxy/go-control-plane/pkg/cache/types"+	ga_api "github.com/wso2/product-microgateway/adapter/pkg/discovery/api/wso2/discovery/ga"+	wso2_cache "github.com/wso2/product-microgateway/adapter/pkg/discovery/protocol/cache/v3"+)++var (+	apiCache wso2_cache.SnapshotCache+	apiMap   map[string]types.Resource+)++const (+	maxRandomInt int    = 999999999+	typeURL      string = "type.googleapis.com/wso2.discovery.ga.Api"+)++// IDHash uses ID field as the node hash.+type IDHash struct{}++// ID uses the node ID field+func (IDHash) ID(node *corev3.Node) string {+	if node == nil {+		return "unknown"+	}+	return node.Id+}++var _ wso2_cache.NodeHash = IDHash{}++func init() {+	apiCache = wso2_cache.NewSnapshotCache(false, IDHash{}, nil)+	apiMap = make(map[string]types.Resource)+	rand.Seed(time.Now().UnixNano())+}++// GetAPICache returns API Cache+func GetAPICache() wso2_cache.SnapshotCache {+	return apiCache+}++// AddAPIsToCache adds the provided set of APIUUIDs and updates the XDS cache for the provided label.+func AddAPIsToCache() {+	AddAPI("default", "apiID1", "1234")+	time.Sleep(10 * time.Second)+	AddAPI("default", "apiID2", "1234")+	time.Sleep(5 * time.Second)+	AddAPI("default", "apiID1", "4567")+	time.Sleep(5 * time.Second)+	RemoveAPI("default", "apiID1")+}++// AddAPI adds the API entry to XDS cache+func AddAPI(label, apiUUID, revisionUUID string) {

+/*+ *  Copyright (c) 2021, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.+ *+ *  Licensed under the Apache License, Version 2.0 (the "License");+ *  you may not use this file except in compliance with the License.+ *  You may obtain a copy of the License at+ *+ *  http://www.apache.org/licenses/LICENSE-2.0+ *+ *  Unless required by applicable law or agreed to in writing, software+ *  distributed under the License is distributed on an "AS IS" BASIS,+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.+ *  See the License for the specific language governing permissions and+ *  limitations under the License.+ *+ */++package xds++import (+	"fmt"+	"math/rand"+	"time"++	corev3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"+	"github.com/envoyproxy/go-control-plane/pkg/cache/types"+	ga_api "github.com/wso2/product-microgateway/adapter/pkg/discovery/api/wso2/discovery/ga"+	wso2_cache "github.com/wso2/product-microgateway/adapter/pkg/discovery/protocol/cache/v3"+)++var (+	apiCache wso2_cache.SnapshotCache+	apiMap   map[string]types.Resource+)++const (+	maxRandomInt int    = 999999999+	typeURL      string = "type.googleapis.com/wso2.discovery.ga.Api"+)++// IDHash uses ID field as the node hash.+type IDHash struct{}++// ID uses the node ID field+func (IDHash) ID(node *corev3.Node) string {+	if node == nil {+		return "unknown"+	}+	return node.Id+}++var _ wso2_cache.NodeHash = IDHash{}++func init() {+	apiCache = wso2_cache.NewSnapshotCache(false, IDHash{}, nil)+	apiMap = make(map[string]types.Resource)

+/*+ *  Copyright (c) 2021, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.+ *+ *  Licensed under the Apache License, Version 2.0 (the "License");+ *  you may not use this file except in compliance with the License.+ *  You may obtain a copy of the License at+ *+ *  http://www.apache.org/licenses/LICENSE-2.0+ *+ *  Unless required by applicable law or agreed to in writing, software+ *  distributed under the License is distributed on an "AS IS" BASIS,+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.+ *  See the License for the specific language governing permissions and+ *  limitations under the License.+ *+ */++package server++import (+	"context"+	"fmt"+	"net"+	"os"+	"os/signal"++	"github.com/wso2-enterprise/choreo-connect-global-adapter/internal/xds"+	ga_service "github.com/wso2/product-microgateway/adapter/pkg/discovery/api/wso2/discovery/service/ga"+	wso2_server "github.com/wso2/product-microgateway/adapter/pkg/discovery/protocol/server/v3"+	"google.golang.org/grpc"+)++const grpcMaxConcurrentStreams = 1000000

 import (  	toml "github.com/pelletier/go-toml" 	logger "github.com/sirupsen/logrus"+	pkg_conf "github.com/wso2/product-microgateway/adapter/pkg/config"

 func GetMgwHome() string { func ReadLogConfigs() (*LogConfig, error) { 	onceLogConfigRead.Do(func() { 		adapterLogConfig = new(LogConfig)-		_, err := os.Stat(GetMgwHome() + relativeLogConfigPath)-		if err != nil {-			logger.Fatal("Log configuration file not found.", err)-			panic(err)-		}-		content, readErr := ioutil.ReadFile(mgwHome + relativeLogConfigPath)+		content, readErr := ioutil.ReadFile(getLogConfigPath()) 		if readErr != nil { 			logger.Fatal("Error reading log configurations. ", readErr)-			panic(err)+			panic(readErr)

 func GetMgwHome() string { 	return mgwHome } +// getLogConfigPath reads the LOG_CONFIG_PATH environmental variable and returns the value.+// If the env variable is not available, returned value would be the combination of MGW_HOME+// env variable value + relative log config path+func getLogConfigPath() string {+	logConfigPath = os.Getenv(logConfigPathEnvVariable)+	if len(strings.TrimSpace(logConfigPath)) == 0 {+		//for backward compatibility+		logConfigPath = GetMgwHome() + relativeLogConfigPath+	}+	_, err := os.Stat(logConfigPath)+	if err != nil {+		logger.Fatal("Log configuration file not found.", err)+		panic(err)

+# The logging configuration file for global adapter+######### root Level ########+logfile = "logs/adapter.log"+logLevel = "INFO"++[rotation]+MaxSize = 10    #meabytes

+/*+ *  Copyright (c) 2021, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.