fixing mqtt lister with content transformation and validation

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.extension/src/main/java/org/wso2/carbon/device/mgt/input/adapter/extension/transformer/MQTTContentTransformer.java

@@ -35,6 +35,7 @@ import java.util.Map;
 public class MQTTContentTransformer implements ContentTransformer {
     private static final String MQTT_CONTENT_TRANSFORMER = "device-meta-transformer";
     private static final String TOPIC = "topic";
+    private static final String DEVICE_ID_INDEX = "deviceIdIndex";
     private static String JSON_ARRAY_START_CHAR = "[";
 
     private static final Log log = LogFactory.getLog(MQTTContentTransformer.class);
@@ -47,15 +48,19 @@ public class MQTTContentTransformer implements ContentTransformer {
     @Override
     public Object transform(Object messagePayload, Map<String, Object> dynamicProperties) {
         String topic = (String) dynamicProperties.get(TOPIC);
+        if (!dynamicProperties.containsKey(DEVICE_ID_INDEX)) {
+            log.error("device id not found in topic ");
+            return false;
+        }
+        int deviceIdIndex = (int)dynamicProperties.get(DEVICE_ID_INDEX);
         String topics[] = topic.split("/");
-        String deviceId = topics[2];
-        String deviceType = topics[1];
+        String deviceId = topics[deviceIdIndex];
         String message = (String) messagePayload;
         try {
             if (message.startsWith(JSON_ARRAY_START_CHAR)) {
-                return processMultipleEvents(message, deviceId, deviceType);
+                return processMultipleEvents(message, deviceId, deviceId);
             } else {
-                return processSingleEvent(message, deviceId, deviceType);
+                return processSingleEvent(message, deviceId, deviceId);
             }
         } catch (ParseException e) {
             log.error("Invalid input " + message, e);

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.extension/src/main/java/org/wso2/carbon/device/mgt/input/adapter/extension/validator/MQTTContentValidator.java

@@ -36,6 +36,7 @@ public class MQTTContentValidator implements ContentValidator {
     private static final String DEVICE_ID_JSON_PATH = "event.metaData.deviceId";
     private static final String DEVICE_TYPE_JSON_PATH = "event.metaData.deviceId";
     private static final String TOPIC = "topic";
+    private static final String DEVICE_ID_INDEX = "deviceIdIndex";
     private static final int DEVICE_ID_TOPIC_HIERARCHY_INDEX = 2;
 
     @Override
@@ -46,9 +47,13 @@ public class MQTTContentValidator implements ContentValidator {
     @Override
     public ContentInfo validate(Object msgPayload, Map<String, Object> dynamicParams) {
         String topic = (String) dynamicParams.get(TOPIC);
+        if (!dynamicParams.containsKey(DEVICE_ID_INDEX)) {
+            log.error("device id not found in topic ");
+            return null;
+        }
+        int deviceIdIndex = (int)dynamicParams.get(DEVICE_ID_INDEX);
         String topics[] = topic.split("/");
-        int deviceIdInTopicHierarchyLevelIndex = DEVICE_ID_TOPIC_HIERARCHY_INDEX;
-        String deviceIdFromTopic = topics[deviceIdInTopicHierarchyLevelIndex];
+        String deviceIdFromTopic = topics[deviceIdIndex];
         boolean status;
         String message = (String) msgPayload;
         if (message.startsWith(JSON_ARRAY_START_CHAR)) {

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

@@ -80,6 +80,10 @@
             <groupId>org.wso2.carbon.devicemgt</groupId>
             <artifactId>org.wso2.carbon.identity.jwt.client.extension</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.wso2.carbon.devicemgt</groupId>
+            <artifactId>org.wso2.carbon.apimgt.keymgt.extension</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.wso2.carbon</groupId>
             <artifactId>org.wso2.carbon.user.api</artifactId>
@@ -151,7 +155,10 @@
                             org.wso2.carbon.utils.multitenancy,
                             org.apache.axis2.context,
                             org.wso2.carbon.core.multitenancy.utils,
-                            org.wso2.carbon.utils
+                            org.wso2.carbon.utils,
+                            org.wso2.carbon.apimgt.keymgt.extension;version="[5.0,6)",
+                            org.wso2.carbon.apimgt.keymgt.extension.exception;version="[5.0,6)",
+                            org.wso2.carbon.apimgt.keymgt.extension.service;version="[5.0,6)"
                         </Import-Package>
                     </instructions>
                 </configuration>

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.mqtt/src/main/java/org/wso2/carbon/device/mgt/input/adapter/mqtt/util/MQTTAdapterListener.java

@@ -17,22 +17,18 @@
 */
 package org.wso2.carbon.device.mgt.input.adapter.mqtt.util;
 
-import org.apache.axis2.context.ConfigurationContext;
 import org.apache.commons.codec.binary.Base64;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpPost;
-import org.apache.http.conn.HttpHostConnectException;
-import org.apache.http.entity.ContentType;
-import org.apache.http.entity.StringEntity;
-import org.apache.http.message.BasicHeader;
 import org.eclipse.paho.client.mqttv3.*;
 import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence;
-import org.json.simple.JSONObject;
-import org.json.simple.parser.JSONParser;
-import org.json.simple.parser.ParseException;
+import org.wso2.carbon.apimgt.keymgt.extension.DCRResponse;
+import org.wso2.carbon.apimgt.keymgt.extension.TokenRequest;
+import org.wso2.carbon.apimgt.keymgt.extension.TokenResponse;
+import org.wso2.carbon.apimgt.keymgt.extension.exception.BadRequestException;
+import org.wso2.carbon.apimgt.keymgt.extension.exception.KeyMgtException;
+import org.wso2.carbon.apimgt.keymgt.extension.service.KeyMgtService;
+import org.wso2.carbon.apimgt.keymgt.extension.service.KeyMgtServiceImpl;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.core.ServerStatus;
 import org.wso2.carbon.core.multitenancy.utils.TenantAxisUtils;
@@ -43,18 +39,10 @@ import org.wso2.carbon.device.mgt.input.adapter.mqtt.internal.InputAdapterServic
 import org.wso2.carbon.event.input.adapter.core.InputEventAdapterConfiguration;
 import org.wso2.carbon.event.input.adapter.core.InputEventAdapterListener;
 import org.wso2.carbon.event.input.adapter.core.exception.InputEventAdapterRuntimeException;
-import org.wso2.carbon.identity.jwt.client.extension.dto.AccessTokenInfo;
 import org.wso2.carbon.identity.jwt.client.extension.exception.JWTClientException;
-import org.wso2.carbon.identity.jwt.client.extension.service.JWTClientManagerService;
 import org.wso2.carbon.user.api.UserStoreException;
 import org.wso2.carbon.utils.multitenancy.MultitenantConstants;
 
-import java.io.IOException;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.security.KeyManagementException;
-import java.security.KeyStoreException;
-import java.security.NoSuchAlgorithmException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -68,6 +56,7 @@ public class MQTTAdapterListener implements MqttCallback, Runnable {
 
     private MQTTBrokerConnectionConfiguration mqttBrokerConnectionConfiguration;
     private String topic;
+    private String topicStructure;
     private String tenantDomain;
     private volatile boolean connectionSucceeded = false;
     private ContentValidator contentValidator;
@@ -88,13 +77,10 @@ public class MQTTAdapterListener implements MqttCallback, Runnable {
         this.mqttBrokerConnectionConfiguration = mqttBrokerConnectionConfiguration;
         this.cleanSession = mqttBrokerConnectionConfiguration.isCleanSession();
         int keepAlive = mqttBrokerConnectionConfiguration.getKeepAlive();
-        this.topic = PropertyUtils.replaceTenantDomainProperty(topic);
+        this.topicStructure = new String(topic);
+        this.topic = PropertyUtils.replacePlaceholders(topic);
         this.eventAdapterListener = inputEventAdapterListener;
-        this.tenantDomain = this.topic.split("/")[0];
-        //this is to allow server listener from IoT Core to connect.
-        if (this.tenantDomain.equals("+")) {
         this.tenantDomain = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantDomain();
-        }
 
         //SORTING messages until the server fetches them
         String temp_directory = System.getProperty("java.io.tmpdir");
@@ -146,58 +132,21 @@ public class MQTTAdapterListener implements MqttCallback, Runnable {
             //getJWT Client Parameters.
             if (dcrUrlString != null && !dcrUrlString.isEmpty()) {
                 try {
-                    URL dcrUrl = new URL(dcrUrlString);
-                    HttpClient httpClient = MQTTUtil.getHttpClient(dcrUrl.getProtocol());
-                    HttpPost postMethod = new HttpPost(dcrUrlString);
-                    RegistrationProfile registrationProfile = new RegistrationProfile();
-                    registrationProfile.setCallbackUrl(MQTTEventAdapterConstants.EMPTY_STRING);
-                    registrationProfile.setGrantType(MQTTEventAdapterConstants.GRANT_TYPE);
-                    registrationProfile.setOwner(username);
-                    registrationProfile.setTokenScope(MQTTEventAdapterConstants.TOKEN_SCOPE);
-                    if (!mqttBrokerConnectionConfiguration.isGlobalCredentailSet()) {
-                        registrationProfile.setClientName(MQTTEventAdapterConstants.APPLICATION_NAME_PREFIX
-                                                                  + mqttBrokerConnectionConfiguration.getAdapterName() +
-                                                                  "_" + tenantDomain);
-                        registrationProfile.setIsSaasApp(false);
-                    } else {
-                        registrationProfile.setClientName(MQTTEventAdapterConstants.APPLICATION_NAME_PREFIX
-                                                                  + mqttBrokerConnectionConfiguration.getAdapterName());
-                        registrationProfile.setIsSaasApp(true);
-                    }
-                    String jsonString = registrationProfile.toJSON();
-                    StringEntity requestEntity = new StringEntity(jsonString, ContentType.APPLICATION_JSON);
-                    postMethod.setEntity(requestEntity);
-                    String basicAuth = getBase64Encode(username, password);
-                    postMethod.setHeader(new BasicHeader(MQTTEventAdapterConstants.AUTHORIZATION_HEADER_NAME,
-                                                         MQTTEventAdapterConstants.AUTHORIZATION_HEADER_VALUE_PREFIX +
-                                                                 basicAuth));
-                    HttpResponse httpResponse = httpClient.execute(postMethod);
-                    if (httpResponse != null) {
-                        String response = MQTTUtil.getResponseString(httpResponse);
-                        try {
-                            if (response != null) {
-                                JSONParser jsonParser = new JSONParser();
-                                JSONObject jsonPayload = (JSONObject) jsonParser.parse(response);
-                                String clientId = (String) jsonPayload.get(MQTTEventAdapterConstants.CLIENT_ID);
-                                String clientSecret = (String) jsonPayload.get(MQTTEventAdapterConstants.CLIENT_SECRET);
-                                connectionOptions.setUserName(getToken(clientId, clientSecret));
-                            }
-                        } catch (ParseException e) {
-                            String msg = "error occurred while parsing generating token for the adapter";
-                            log.error(msg, e);
-                        }
-                    }
-                } catch (HttpHostConnectException e) {
-                    log.error("Keymanager is unreachable, Waiting....");
-                    return false;
-                } catch (MalformedURLException e) {
-                    log.error("Invalid dcrUrl : " + dcrUrlString);
-                    return false;
+                    KeyMgtService keyMgtService = new KeyMgtServiceImpl();
+                    String applicationName = MQTTEventAdapterConstants.APPLICATION_NAME_PREFIX
+                            + mqttBrokerConnectionConfiguration.getAdapterName();
+                    DCRResponse dcrResponse = keyMgtService.dynamicClientRegistration(applicationName, username,
+                            "client_credentials", null, new String[]{"device_management"}, false, Integer.MAX_VALUE);
+                    String accessToken = getToken(dcrResponse.getClientId(), dcrResponse.getClientSecret());
+                    connectionOptions.setUserName(accessToken.substring(0, 18));
+                    connectionOptions.setPassword(accessToken.substring(19).toCharArray());
+
+
                 } catch (JWTClientException | UserStoreException e) {
-                    log.error("Failed to create an oauth token with jwt grant type.", e);
+                    log.error("Failed to create an oauth token with client_credentials grant type.", e);
                     return false;
-                } catch (NoSuchAlgorithmException | KeyManagementException | KeyStoreException | IOException e) {
-                    log.error("Failed to create a http connection.", e);
+                } catch (KeyMgtException e) {
+                    log.error("Failed to create an application.", e);
                     return false;
                 }
             }
@@ -249,7 +198,8 @@ public class MQTTAdapterListener implements MqttCallback, Runnable {
     @Override
     public void messageArrived(String topic, MqttMessage mqttMessage) throws Exception {
         try {
-            String msgText = mqttMessage.toString();
+            String mqttMsgString =  mqttMessage.toString();
+            String msgText = mqttMsgString.substring(mqttMsgString.indexOf("{"), mqttMsgString.indexOf("}") +1);
             if (log.isDebugEnabled()) {
                 log.debug(msgText);
             }
@@ -267,10 +217,18 @@ public class MQTTAdapterListener implements MqttCallback, Runnable {
                 log.debug("Event received in MQTT Event Adapter - " + msgText);
             }
 
+
             if (contentValidator != null && contentTransformer != null) {
                 ContentInfo contentInfo;
                 Map<String, Object> dynamicProperties = new HashMap<>();
                 dynamicProperties.put(MQTTEventAdapterConstants.TOPIC, topic);
+                int deviceIdIndex = -1;
+                for (String topicStructurePart : topicStructure.split("/")) {
+                    deviceIdIndex++;
+                    if (topicStructurePart.contains("+")) {
+                        dynamicProperties.put(MQTTEventAdapterConstants.DEVICE_ID_INDEX, deviceIdIndex);
+                    }
+                }
                 Object transformedMessage = contentTransformer.transform(msgText, dynamicProperties);
                 contentInfo = contentValidator.validate(transformedMessage, dynamicProperties);
                 if (contentInfo != null && contentInfo.isValidContent()) {
@@ -326,21 +284,22 @@ public class MQTTAdapterListener implements MqttCallback, Runnable {
         PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantDomain(tenantDomain, true);
         try {
             String scopes = mqttBrokerConnectionConfiguration.getBrokerScopes();
-            String username = mqttBrokerConnectionConfiguration.getUsername();
-            if (mqttBrokerConnectionConfiguration.isGlobalCredentailSet()) {
-                username = PrivilegedCarbonContext.getThreadLocalCarbonContext()
-                        .getUserRealm().getRealmConfiguration().getAdminUserName() + "@" + PrivilegedCarbonContext
-                        .getThreadLocalCarbonContext().getTenantDomain(true);
-            }
+            scopes += " perm:topic:sub:" + this.topic.replace("/",":");
+            scopes += " perm:topic:pub:" + this.topic.replace("/",":");
 
-            JWTClientManagerService jwtClientManagerService =
-                    InputAdapterServiceDataHolder.getJwtClientManagerService();
-            AccessTokenInfo accessTokenInfo = jwtClientManagerService.getJWTClient().getAccessToken(
-                    clientId, clientSecret, username, scopes);
-            return accessTokenInfo.getAccessToken();
+            TokenRequest tokenRequest = new TokenRequest(clientId, clientSecret,
+                    null, scopes.toString(), "client_credentials", null,
+                    null, null, null,  Integer.MAX_VALUE);
+            KeyMgtService keyMgtService = new KeyMgtServiceImpl();
+            TokenResponse tokenResponse = keyMgtService.generateAccessToken(tokenRequest);
+
+            return tokenResponse.getAccessToken();
+        } catch (KeyMgtException | BadRequestException e) {
+            log.error("Error while generating access token", e);
         } finally {
             PrivilegedCarbonContext.endTenantFlow();
         }
+        return null;
     }
 
     private String getBase64Encode(String key, String value) {

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.mqtt/src/main/java/org/wso2/carbon/device/mgt/input/adapter/mqtt/util/MQTTEventAdapterConstants.java

@@ -64,6 +64,7 @@ public class MQTTEventAdapterConstants {
     public static final String EMPTY = "";
     public static final String MQTT_CONTENT_VALIDATION_DEFAULT_PARAMETERS = "";
     public static final String TOPIC = "topic";
+    public static final String DEVICE_ID_INDEX = "deviceIdIndex";
     public static final String PAYLOAD = "payload";
     public static final String AUTHORIZATION_HEADER_NAME = "Authorization";
     public static final String AUTHORIZATION_HEADER_VALUE_PREFIX = "Basic ";

components/extensions/cdmf-transport-adapters/input/org.wso2.carbon.device.mgt.input.adapter.mqtt/src/main/java/org/wso2/carbon/device/mgt/input/adapter/mqtt/util/PropertyUtils.java

@@ -25,7 +25,9 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 class PropertyUtils {
-    private static final String TENANT_DOMAIN_PROPERTY = "\\$\\{tenant-domain\\}";
+    private static final String TENANT_DOMAIN_PROPERTY = "\\$\\{tenantDomain\\}";
+    private static final String DEVICE_TYPE_PROPERTY = "\\$\\{deviceType\\}";
+    private static final String DEVICE_ID_PROPERTY = "\\$\\{deviceId\\}";
 
     //This method is only used if the mb features are within DAS.
     static String replaceMqttProperty(String urlWithPlaceholders) throws InputEventAdapterException {
@@ -50,4 +52,10 @@ class PropertyUtils {
                 .getThreadLocalCarbonContext().getTenantDomain(true));
         return urlWithPlaceholders;
     }
+
+    public static String replacePlaceholders(String urlWithPlaceholders) {
+        urlWithPlaceholders = urlWithPlaceholders.replaceAll(TENANT_DOMAIN_PROPERTY, "+")
+                .replaceAll(DEVICE_TYPE_PROPERTY, "+").replaceAll(DEVICE_ID_PROPERTY, "+");
+        return urlWithPlaceholders;
+    }
 }

pom.xml

@@ -305,6 +305,11 @@
                 <artifactId>org.wso2.carbon.identity.jwt.client.extension</artifactId>
                 <version>${carbon.devicemgt.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.wso2.carbon.devicemgt</groupId>
+                <artifactId>org.wso2.carbon.apimgt.keymgt.extension</artifactId>
+                <version>${carbon.devicemgt.version}</version>
+            </dependency>
             <dependency>
                 <groupId>org.wso2.carbon.devicemgt</groupId>
                 <artifactId>org.wso2.carbon.apimgt.application.extension</artifactId>
@@ -1170,7 +1175,7 @@
     <properties>
 
         <!-- Carbon Device Management -->
-        <carbon.devicemgt.version>5.0.20</carbon.devicemgt.version>
+        <carbon.devicemgt.version>5.0.21-SNAPSHOT</carbon.devicemgt.version>
         <carbon.devicemgt.version.range>[5.0.0, 6.0.0)</carbon.devicemgt.version.range>
 
         <!-- Carbon Device Management Plugins -->