adding existing API check before publishing

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/util/DeviceManagerUtil.java

@@ -172,17 +172,19 @@ public final class DeviceManagerUtil {
         APIIdentifier id = new APIIdentifier(config.getOwner(), config.getName(), config.getVersion());
         API api = new API(id);
         try {
-            api.setContext(config.getContext());
-            api.setUrl(config.getEndpoint());
-            api.setUriTemplates(getURITemplates(config.getEndpoint(),
-                    APIConstants.AUTH_APPLICATION_OR_USER_LEVEL_TOKEN));
-            api.setVisibility(APIConstants.API_GLOBAL_VISIBILITY);
-            api.addAvailableTiers(provider.getTiers());
-            api.setEndpointSecured(false);
-            api.setStatus(APIStatus.PUBLISHED);
-            api.setTransports(config.getTransports());
-
-            provider.addAPI(api);
+	        if(!provider.isAPIAvailable(id)) {
+		        api.setContext(config.getContext());
+		        api.setUrl(config.getEndpoint());
+		        api.setUriTemplates(getURITemplates(config.getEndpoint(),
+		                                            APIConstants.AUTH_APPLICATION_OR_USER_LEVEL_TOKEN));
+		        api.setVisibility(APIConstants.API_GLOBAL_VISIBILITY);
+		        api.addAvailableTiers(provider.getTiers());
+		        api.setEndpointSecured(false);
+		        api.setStatus(APIStatus.PUBLISHED);
+		        api.setTransports(config.getTransports());
+
+		        provider.addAPI(api);
+	        }
         } catch (APIManagementException e) {
             throw new DeviceManagementException("Error occurred while registering the API", e);
         }

features/device-mgt/org.wso2.carbon.device.mgt.server.feature/src/main/resources/conf/user-api-publisher-config.xml

@@ -21,7 +21,7 @@
             <API>
                <Name>appmanager</Name>
                <Owner>admin</Owner>
-               <Context>devices</Context>
+               <Context>/devices</Context>
                <Version>1.0.0</Version>
                <Endpoint>http://localhost:9763/</Endpoint>
                <Transports>http,https</Transports>