Add debug logs for Device Management Plugin Repository

It is important to have debugged logs when finding the root causes for some issues.Hence added those to the Device Management Plugin Repository.

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

@@ -23,6 +23,7 @@ import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.mgt.common.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.DeviceStatusTaskPluginConfig;
+import org.wso2.carbon.device.mgt.common.InvalidConfigurationException;
 import org.wso2.carbon.device.mgt.common.OperationMonitoringTaskConfig;
 import org.wso2.carbon.device.mgt.common.ProvisioningConfig;
 import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManager;
@@ -71,6 +72,9 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
         String deviceType = provider.getType();
         ProvisioningConfig provisioningConfig = provider.getProvisioningConfig();
         String tenantDomain = provisioningConfig.getProviderTenantDomain();
+        if (log.isDebugEnabled()) {
+            log.debug(deviceType + " device type is added for tenant : " + tenantDomain);
+        }
         DeviceManagementConfig deviceManagementConfig = DeviceConfigurationManager.getInstance().getDeviceManagementConfig();
         boolean isSharedWithAllTenants = provisioningConfig.isSharedWithAllTenants();
         int tenantId = DeviceManagerUtil.getTenantId(tenantDomain);
@@ -125,6 +129,9 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
     public void removeDeviceManagementProvider(DeviceManagementService provider)
             throws DeviceManagementException {
         String deviceTypeName = provider.getType();
+        if (log.isDebugEnabled()) {
+            log.debug(deviceTypeName + " device type is removed.");
+        }
         DeviceManagementConfig deviceManagementConfig = DeviceConfigurationManager.getInstance()
                 .getDeviceManagementConfig();
         DeviceTypeServiceIdentifier deviceTypeIdentifier;
@@ -152,6 +159,15 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
     private void unregisterPushNotificationStrategy(DeviceTypeServiceIdentifier deviceTypeIdentifier) {
         OperationManager operationManager = operationManagerRepository.getOperationManager(
                 deviceTypeIdentifier);
+        if (log.isDebugEnabled()) {
+            log.debug(deviceTypeIdentifier.getDeviceType() + " device type management service is " +
+                              "retrieved for tenant id: " + deviceTypeIdentifier.getTenantId());
+
+            for (Map.Entry<DeviceTypeServiceIdentifier, DeviceManagementServiceHolder> entry : providers.entrySet()) {
+                log.debug("Device Type : " + entry.getKey().getDeviceType() + " Tenant Id : " +
+                                  entry.getKey().getTenantId());
+            }
+        }
         if (operationManager != null) {
             NotificationStrategy notificationStrategy = operationManager.getNotificationStrategy();
             if (notificationStrategy != null) {
@@ -165,6 +181,14 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
         //Priority need to be given to the tenant before public.
         DeviceTypeServiceIdentifier deviceTypeIdentifier = new DeviceTypeServiceIdentifier(type, tenantId);
         DeviceManagementServiceHolder provider = providers.get(deviceTypeIdentifier);
+        if (log.isDebugEnabled()) {
+            log.debug(type + " device type management service is retrieved for tenant id: " + tenantId);
+
+            for (Map.Entry<DeviceTypeServiceIdentifier, DeviceManagementServiceHolder> entry : providers.entrySet()) {
+                log.debug("Device Type : " + entry.getKey().getDeviceType() + " Tenant Id : " +
+                                  entry.getKey().getTenantId());
+            }
+        }
         if (provider == null) {
             deviceTypeIdentifier = new DeviceTypeServiceIdentifier(type);
             provider = providers.get(deviceTypeIdentifier);
@@ -310,6 +334,9 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
         DeviceTaskManagerService deviceTaskManagerService = DeviceManagementDataHolder.getInstance().
                 getDeviceTaskManagerService();
         DeviceStatusTaskPluginConfig deviceStatusTaskPluginConfig = deviceManagementService.getDeviceStatusTaskPluginConfig();
+        if (log.isDebugEnabled()) {
+            log.debug(deviceType + " device type status monitoring task is registered.");
+        }
         if (deviceStatusTaskPluginConfig != null && deviceStatusTaskPluginConfig.isRequireStatusMonitoring()) {
             if (deviceTaskManagerService == null) {
                 DeviceManagementDataHolder.getInstance().addDeviceStatusTaskPluginConfig(deviceType,
@@ -330,6 +357,9 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
         DeviceStatusTaskManagerService deviceStatusTaskManagerService = DeviceManagementDataHolder.getInstance().
                 getDeviceStatusTaskManagerService();
         DeviceStatusTaskPluginConfig deviceStatusTaskPluginConfig = deviceManagementService.getDeviceStatusTaskPluginConfig();
+        if (log.isDebugEnabled()) {
+            log.debug(deviceType + " device type status monitoring task is unregistered.");
+        }
         if (deviceStatusTaskPluginConfig != null && deviceStatusTaskPluginConfig.isRequireStatusMonitoring()) {
             try {
                 DeviceManagementDataHolder.getInstance().removeDeviceStatusTaskPluginConfig(deviceType);
@@ -346,6 +376,9 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
     public OperationManager getOperationManager(String deviceType, int tenantId) {
         //Priority need to be given to the tenant before public.
         DeviceTypeServiceIdentifier deviceTypeIdentifier = new DeviceTypeServiceIdentifier(deviceType, tenantId);
+        if (log.isDebugEnabled()) {
+            log.debug(deviceType + " device type operation manager is retrieved for tenant: ." + tenantId);
+        }
         if (getDeviceManagementService(deviceType, tenantId) == null) {
             return null;
         }