added log support for server to server communication

components/extensions/appm-connector/org.wso2.carbon.appmgt.mdm.restconnector/pom.xml

@@ -68,7 +68,8 @@
 							org.json.simple.*,
 							org.wso2.carbon.appmgt.mobile.beans,
 							org.wso2.carbon.context,
-							javax.net.ssl
+							javax.net.ssl,
+							feign.slf4j
                         </Import-Package>
                         <Export-Package>
                             !org.wso2.carbon.appmgt.mdm.restconnector.internal,
@@ -121,6 +122,10 @@
 			<groupId>org.wso2.carbon.appmgt</groupId>
 			<artifactId>org.wso2.carbon.appmgt.mobile</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-slf4j</artifactId>
+		</dependency>
     </dependencies>
 
 </project>

components/extensions/appm-connector/org.wso2.carbon.appmgt.mdm.restconnector/src/main/java/org/wso2/carbon/appmgt/mdm/restconnector/ApplicationOperationsImpl.java

@@ -25,6 +25,7 @@ import feign.Response;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.json.simple.JSONObject;
@@ -75,12 +76,12 @@ public class ApplicationOperationsImpl implements ApplicationOperations {
     public ApplicationOperationsImpl() {
         String authorizationConfigManagerServerURL = AuthorizationConfigurationManager.getInstance().getServerURL();
         OAuthRequestInterceptor oAuthRequestInterceptor = new OAuthRequestInterceptor();
-        deviceManagementAdminService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(
+        deviceManagementAdminService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(
                 Logger.Level.FULL).requestInterceptor(oAuthRequestInterceptor)
                 .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                 .target(DeviceManagementAdminService.class,
                         authorizationConfigManagerServerURL + CDMF_SERVER_BASE_CONTEXT);
-        applicationManagementAdminService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(
+        applicationManagementAdminService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(
                 Logger.Level.FULL).requestInterceptor(oAuthRequestInterceptor)
                 .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                 .target(ApplicationManagementAdminService.class,
@@ -317,30 +318,4 @@ public class ApplicationOperationsImpl implements ApplicationOperations {
         }
     }
 
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
 }

components/extensions/appm-connector/org.wso2.carbon.appmgt.mdm.restconnector/src/main/java/org/wso2/carbon/appmgt/mdm/restconnector/authorization/client/OAuthRequestInterceptor.java

@@ -28,6 +28,7 @@ import feign.auth.BasicAuthRequestInterceptor;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.appmgt.mdm.restconnector.Constants;
@@ -72,7 +73,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
         refreshTimeOffset = AuthorizationConfigurationManager.getInstance().getTokenRefreshTimeOffset();
         String username = AuthorizationConfigurationManager.getInstance().getUserName();
         String password = AuthorizationConfigurationManager.getInstance().getPassword();
-        apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(
+        apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(
                 Logger.Level.FULL).requestInterceptor(new BasicAuthRequestInterceptor(username, password))
                 .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                 .target(ApiApplicationRegistrationService.class,
@@ -100,7 +101,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             String consumerSecret = apiApplicationKey.getConsumerSecret();
             String username = AuthorizationConfigurationManager.getInstance().getUserName();
             String password = AuthorizationConfigurationManager.getInstance().getPassword();
-            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(Logger.Level.FULL)
+            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(Logger.Level.FULL)
                     .requestInterceptor(new BasicAuthRequestInterceptor(consumerKey, consumerSecret))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(TokenIssuerService.class, AuthorizationConfigurationManager.getInstance().getTokenApiURL());
@@ -149,31 +150,4 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
         }
     }
 
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
-
 }

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.http/pom.xml

@@ -92,6 +92,10 @@
 			<groupId>javax.ws.rs</groupId>
 			<artifactId>jsr311-api</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-slf4j</artifactId>
+		</dependency>
     </dependencies>
 
     <build>
@@ -161,7 +165,8 @@
 							org.wso2.carbon.identity.oauth2.*,
 							org.wso2.carbon.utils,
 							org.wso2.carbon.utils.multitenancy,
-							javax.net.ssl
+							javax.net.ssl,
+							feign.slf4j
                         </Import-Package>
 						<Embed-Dependency>
 							jsr311-api,

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.http/src/main/java/org/wso2/carbon/device/mgt/input/adapter/http/authorization/DeviceAuthorizer.java

@@ -26,6 +26,7 @@ import feign.Response;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.input.adapter.http.authorization.client.OAuthRequestInterceptor;
@@ -62,7 +63,7 @@ public class DeviceAuthorizer {
 
     public DeviceAuthorizer(Map<String, String> globalProperties) {
         try {
-            deviceAccessAuthorizationAdminService = Feign.builder().client(getSSLClient()).logger(getLogger())
+            deviceAccessAuthorizationAdminService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger())
                     .logLevel(Logger.Level.FULL).requestInterceptor(new OAuthRequestInterceptor(globalProperties))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(DeviceAccessAuthorizationAdminService.class, getDeviceMgtServerUrl(globalProperties)
@@ -143,31 +144,4 @@ public class DeviceAuthorizer {
         }
     }
 
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
-
 }

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.http/src/main/java/org/wso2/carbon/device/mgt/input/adapter/http/authorization/client/OAuthRequestInterceptor.java

@@ -25,6 +25,7 @@ import feign.auth.BasicAuthRequestInterceptor;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.input.adapter.http.authorization.client.dto.AccessTokenInfo;
@@ -89,7 +90,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             username = getUsername(globalProperties);
             password = getPassword(globalProperties);
             tokenEndpoint = getTokenEndpoint(globalProperties);
-            apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(
+            apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(
                     Logger.Level.FULL).requestInterceptor(new BasicAuthRequestInterceptor(username, password))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(ApiApplicationRegistrationService.class,
@@ -112,7 +113,8 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             ApiApplicationKey apiApplicationKey = apiApplicationRegistrationService.register(apiRegistrationProfile);
             String consumerKey = apiApplicationKey.getConsumerKey();
             String consumerSecret = apiApplicationKey.getConsumerSecret();
-            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(Logger.Level.FULL)
+            tokenIssuerService = Feign.builder().client(getSSLClient())
+                    .logger(new Slf4jLogger()).logLevel(Logger.Level.FULL)
                     .requestInterceptor(new BasicAuthRequestInterceptor(consumerKey, consumerSecret))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(TokenIssuerService.class, tokenEndpoint);
@@ -202,32 +204,4 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             return null;
         }
     }
-
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
-
 }

components/extensions/cdmf-transport-adapters/output/org.wso2.carbon.device.mgt.output.adapter.websocket/pom.xml

@@ -95,6 +95,10 @@
 			<groupId>javax.ws.rs</groupId>
 			<artifactId>jsr311-api</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-slf4j</artifactId>
+		</dependency>
     </dependencies>
 
     <build>
@@ -170,7 +174,8 @@
 							feign.codec,
 							feign.gson,
 							javax.cache,
-							javax.net.ssl
+							javax.net.ssl,
+							feign.slf4j
                         </Import-Package>
                         <DynamicImport-Package>*</DynamicImport-Package>
 						<Embed-Dependency>

components/extensions/cdmf-transport-adapters/output/org.wso2.carbon.device.mgt.output.adapter.websocket/src/main/java/org/wso2/carbon/device/mgt/output/adapter/websocket/authorization/DeviceAuthorizer.java

@@ -26,6 +26,7 @@ import feign.Response;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.output.adapter.websocket.authentication.AuthenticationInfo;
@@ -80,7 +81,7 @@ public class DeviceAuthorizer implements Authorizer {
             }
         }
         try {
-            deviceAccessAuthorizationAdminService = Feign.builder().client(getSSLClient()).logger(getLogger())
+            deviceAccessAuthorizationAdminService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger())
                     .logLevel(Logger.Level.FULL).requestInterceptor(new OAuthRequestInterceptor(globalProperties))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(DeviceAccessAuthorizationAdminService.class, getDeviceMgtServerUrl(globalProperties)
@@ -175,31 +176,4 @@ public class DeviceAuthorizer implements Authorizer {
             return null;
         }
     }
-
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
 }

components/extensions/cdmf-transport-adapters/output/org.wso2.carbon.device.mgt.output.adapter.websocket/src/main/java/org/wso2/carbon/device/mgt/output/adapter/websocket/authorization/client/OAuthRequestInterceptor.java

@@ -25,6 +25,7 @@ import feign.auth.BasicAuthRequestInterceptor;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.output.adapter.websocket.authorization.client.dto.AccessTokenInfo;
@@ -90,7 +91,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             username = getUsername(globalProperties);
             password = getPassword(globalProperties);
             tokenEndpoint = getTokenEndpoint(globalProperties);
-            apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(getLogger())
+            apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger())
                     .logLevel(Logger.Level.FULL).requestInterceptor(new BasicAuthRequestInterceptor(username, password))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(ApiApplicationRegistrationService.class,
@@ -113,7 +114,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             ApiApplicationKey apiApplicationKey = apiApplicationRegistrationService.register(apiRegistrationProfile);
             String consumerKey = apiApplicationKey.getConsumerKey();
             String consumerSecret = apiApplicationKey.getConsumerSecret();
-            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(Logger.Level.FULL)
+            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(Logger.Level.FULL)
                     .requestInterceptor(new BasicAuthRequestInterceptor(consumerKey, consumerSecret))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(TokenIssuerService.class, tokenEndpoint);
@@ -204,31 +205,4 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
         }
     }
 
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
-
 }

components/extensions/mb-extensions/org.wso2.carbon.andes.extensions.device.mgt.mqtt.authorization/pom.xml

@@ -78,6 +78,10 @@
             <groupId>org.wso2.carbon</groupId>
             <artifactId>javax.cache.wso2</artifactId>
         </dependency>
+		<dependency>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-slf4j</artifactId>
+		</dependency>
     </dependencies>
 
     <build>
@@ -124,7 +128,8 @@
                             javax.xml.stream,
 							org.wso2.carbon.base,
 							org.wso2.carbon.utils,
-							javax.net.ssl
+							javax.net.ssl,
+							feign.slf4j
                         </Import-Package>
 						<Embed-Dependency>
 							jsr311-api,

components/extensions/mb-extensions/org.wso2.carbon.andes.extensions.device.mgt.mqtt.authorization/src/main/java/org/wso2/carbon/andes/extensions/device/mgt/mqtt/authorization/DeviceAccessBasedMQTTAuthorizer.java

@@ -27,6 +27,7 @@ import feign.Response;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.dna.mqtt.moquette.server.IAuthorizer;
@@ -80,7 +81,7 @@ public class DeviceAccessBasedMQTTAuthorizer implements IAuthorizer {
 
     public DeviceAccessBasedMQTTAuthorizer() {
         this.MQTTAuthorizationConfiguration = AuthorizationConfigurationManager.getInstance();
-        deviceAccessAuthorizationAdminService = Feign.builder().client(getSSLClient()).logger(getLogger())
+        deviceAccessAuthorizationAdminService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger())
                 .logLevel(Logger.Level.FULL).requestInterceptor(new OAuthRequestInterceptor())
                 .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                 .target(DeviceAccessAuthorizationAdminService.class,
@@ -268,31 +269,4 @@ public class DeviceAccessBasedMQTTAuthorizer implements IAuthorizer {
         }
     }
 
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
-
 }

components/extensions/mb-extensions/org.wso2.carbon.andes.extensions.device.mgt.mqtt.authorization/src/main/java/org/wso2/carbon/andes/extensions/device/mgt/mqtt/authorization/client/OAuthRequestInterceptor.java

@@ -27,6 +27,7 @@ import feign.codec.Encoder;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
 import feign.jaxrs.JAXRSContract;
+import feign.slf4j.Slf4jLogger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.andes.extensions.device.mgt.mqtt.authorization.client.dto.AccessTokenInfo;
@@ -70,7 +71,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
         refreshTimeOffset = AuthorizationConfigurationManager.getInstance().getTokenRefreshTimeOffset() * 1000;
         String username = AuthorizationConfigurationManager.getInstance().getUsername();
         String password = AuthorizationConfigurationManager.getInstance().getPassword();
-        apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(
+        apiApplicationRegistrationService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(
                 Logger.Level.FULL).requestInterceptor(new BasicAuthRequestInterceptor(username, password))
                 .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                 .target(ApiApplicationRegistrationService.class,
@@ -92,7 +93,7 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
             String consumerSecret = apiApplicationKey.getConsumerSecret();
             String username = AuthorizationConfigurationManager.getInstance().getUsername();
             String password = AuthorizationConfigurationManager.getInstance().getPassword();
-            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(getLogger()).logLevel(Logger.Level.FULL)
+            tokenIssuerService = Feign.builder().client(getSSLClient()).logger(new Slf4jLogger()).logLevel(Logger.Level.FULL)
                     .requestInterceptor(new BasicAuthRequestInterceptor(consumerKey, consumerSecret))
                     .contract(new JAXRSContract()).encoder(new GsonEncoder()).decoder(new GsonDecoder())
                     .target(TokenIssuerService.class,
@@ -142,31 +143,4 @@ public class OAuthRequestInterceptor implements RequestInterceptor {
         }
     }
 
-    private static Logger getLogger() {
-        return new Logger() {
-            @Override
-            protected void log(String configKey, String format, Object... args) {
-                if (log.isDebugEnabled()) {
-                    log.debug(String.format(methodTag(configKey) + format, args));
-                }
-            }
-
-            @Override
-            protected void logRequest(String configKey, Level logLevel, Request request) {
-                if (log.isDebugEnabled()) {
-                    super.logRequest(configKey, logLevel, request);
-                }
-            }
-
-            @Override
-            protected Response logAndRebufferResponse(String configKey, Level logLevel, Response response,
-                                                      long elapsedTime) throws IOException {
-                if (log.isDebugEnabled()) {
-                    return super.logAndRebufferResponse(configKey, logLevel, response, elapsedTime);
-                }
-                return response;
-            }
-        };
-    }
-
 }

pom.xml

@@ -1072,6 +1072,11 @@
                 <artifactId>feign-gson</artifactId>
                 <version>${io.github.openfeign.version}</version>
             </dependency>
+			<dependency>
+				<groupId>io.github.openfeign</groupId>
+				<artifactId>feign-slf4j</artifactId>
+				<version>${io.github.openfeign.version}</version>
+			</dependency>
 
             <!-- dependencies for siddhi extension -->
             <dependency>