Modify logic of saving DeviceTypePluginDAOManager to support multi tenancy

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/DeviceTypeManager.java

@@ -59,6 +59,7 @@ import org.wso2.carbon.device.mgt.extensions.device.type.template.dao.DeviceDAOD
 import org.wso2.carbon.device.mgt.extensions.device.type.template.dao.DeviceTypePluginDAOManager;
 import org.wso2.carbon.device.mgt.extensions.device.type.template.exception.DeviceTypeDeployerPayloadException;
 import org.wso2.carbon.device.mgt.extensions.device.type.template.exception.DeviceTypeMgtPluginException;
+import org.wso2.carbon.device.mgt.extensions.device.type.template.exception.DeviceTypePluginExtensionException;
 import org.wso2.carbon.device.mgt.extensions.device.type.template.feature.ConfigurationBasedFeatureManager;
 import org.wso2.carbon.device.mgt.extensions.device.type.template.util.DeviceTypePluginConstants;
 import org.wso2.carbon.device.mgt.extensions.device.type.template.util.DeviceTypeUtils;
@@ -223,10 +224,19 @@ public class DeviceTypeManager implements DeviceManager {
      * device type plugin in working with its DAO components
      */
     private void setDeviceTypePluginManager() {
-        if (StringUtils.isNotEmpty(deviceType) && deviceTypePluginDAOManager != null) {
+        if (StringUtils.isNotEmpty(deviceType)) {
+            if (deviceTypePluginDAOManager != null) {
                 DeviceTypePluginExtensionService deviceTypeManagerExtensionService =
                         new DeviceTypePluginExtensionServiceImpl();
                 deviceTypeManagerExtensionService.addPluginDAOManager(deviceType, deviceTypePluginDAOManager);
+            } else {
+                log.warn("Could not save DeviceTypePluginDAOManager for device type: " + deviceType +
+                         " since DeviceTypePluginDAOManager is null.");
+            }
+        } else {
+            String msg = "Could not save DeviceTypePluginDAOManager since device type is null or empty.";
+            log.error(msg);
+            throw new DeviceTypePluginExtensionException(msg);
         }
     }
 

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/DeviceTypePluginExtensionServiceImpl.java

@@ -17,7 +17,11 @@
  */
 package org.wso2.carbon.device.mgt.extensions.device.type.template;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.mgt.extensions.device.type.template.dao.DeviceTypePluginDAOManager;
+import org.wso2.carbon.device.mgt.extensions.device.type.template.exception.DeviceTypePluginExtensionException;
 import org.wso2.carbon.device.mgt.extensions.spi.DeviceTypePluginExtensionService;
 
 import java.util.HashMap;
@@ -25,19 +29,38 @@ import java.util.Map;
 
 public class DeviceTypePluginExtensionServiceImpl implements DeviceTypePluginExtensionService {
 
+    private static final Log log = LogFactory.getLog(DeviceTypePluginExtensionServiceImpl.class);
+
     private static volatile Map<String, DeviceTypePluginDAOManager> pluginDAOManagers = new HashMap<>();
 
     @Override
     public void addPluginDAOManager(String deviceType, DeviceTypePluginDAOManager pluginDAOManager) {
+        int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
         if (pluginDAOManager != null) {
-            if (!pluginDAOManagers.containsKey(deviceType)) {
+            if (!pluginDAOManagers.containsKey(tenantId + deviceType)) {
-                pluginDAOManagers.put(deviceType, pluginDAOManager);
+                if (log.isDebugEnabled()) {
+                    log.debug("Saving DeviceTypePluginDAOManager against tenant id " + tenantId +
+                              " and device type: " + deviceType);
+                }
+                pluginDAOManagers.put(tenantId + deviceType, pluginDAOManager);
             }
         }
     }
 
     @Override
     public DeviceTypePluginDAOManager getPluginDAOManager(String deviceType) {
-        return pluginDAOManagers.get(deviceType);
+        int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
+        if (pluginDAOManagers.containsKey(tenantId + deviceType)) {
+            if (log.isDebugEnabled()) {
+                log.debug("Retrieving DeviceTypePluginDAOManager against tenant id " + tenantId +
+                          " and device type: " + deviceType);
+            }
+            return pluginDAOManagers.get(tenantId + deviceType);
+        } else {
+            String msg = "DeviceTypePluginDAOManager could not be found against tenant id " + tenantId +
+                         " and device type: " + deviceType;
+            log.error(msg);
+            throw new DeviceTypePluginExtensionException(msg);
+        }
     }
 }

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/exception/DeviceTypePluginExtensionException.java

@@ -0,0 +1,12 @@
+package org.wso2.carbon.device.mgt.extensions.device.type.template.exception;
+
+public class DeviceTypePluginExtensionException extends RuntimeException {
+
+    public DeviceTypePluginExtensionException(String msg) {
+        super(msg);
+    }
+
+    public DeviceTypePluginExtensionException(String msg, Throwable cause) {
+        super(msg, cause);
+    }
+}

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/spi/DeviceTypePluginExtensionService.java

@@ -26,14 +26,14 @@ import org.wso2.carbon.device.mgt.extensions.device.type.template.dao.DeviceType
 public interface DeviceTypePluginExtensionService {
 
     /**
-     * Save device type specific pluginDAOManager in a HashMap
+     * Save device type specific DeviceTypePluginDAOManager in a HashMap againast tenant ID and device type
      * @param deviceType - Type of the device (i.e; android, ios, windows)
      * @param pluginDAOManager - Device type plugin DAO manager instance to be saved against device type
      */
     void addPluginDAOManager(String deviceType, DeviceTypePluginDAOManager pluginDAOManager);
 
     /**
-     * Retrieve the DeviceTypePluginDAOManager instance given the device type
+     * Retrieve the DeviceTypePluginDAOManager instance against tenant ID and given device type
      * @param deviceType - Type of the device (i.e; android, ios, windows)
      * @return an Instance of {@link DeviceTypePluginDAOManager}
      */