Fix concurrency issue in push notification execution

(cherry picked from commit c5b7612b135ad685e1532f4993d20d7e8097e8e2)

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

@@ -77,6 +77,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadPoolExecutor;
 
 /**
  * This class implements all the functionality exposed as part of the OperationManager. Any transaction initiated
@@ -105,6 +107,8 @@ public class OperationManagerImpl implements OperationManager {
     private final Map<Integer, Long> lastUpdatedTimeStamps;
     private final ConcurrentMap<Integer, String> operationsInitBy;
 
+    private final ThreadPoolExecutor notificationExecutor;
+
     public OperationManagerImpl() {
         commandOperationDAO = OperationManagementDAOFactory.getCommandOperationDAO();
         configOperationDAO = OperationManagementDAOFactory.getConfigOperationDAO();
@@ -117,6 +121,7 @@ public class OperationManagerImpl implements OperationManager {
         notificationStrategies = new HashMap<>();
         lastUpdatedTimeStamps = new HashMap<>();
         operationsInitBy = new ConcurrentHashMap<>();
+        notificationExecutor = (ThreadPoolExecutor) Executors.newFixedThreadPool(10);
     }
 
     public OperationManagerImpl(String deviceType, DeviceManagementService deviceManagementService) {
@@ -422,6 +427,10 @@ public class OperationManagerImpl implements OperationManager {
          * Otherwise device may call pending operation while DB is locked for write and deadlock can occur.
          */
         if (notificationStrategy != null) {
+            int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
+            notificationExecutor.execute(() -> {
+                PrivilegedCarbonContext.startTenantFlow();
+                PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantId(tenantId, true);
                 if (log.isDebugEnabled()) {
                     log.debug("Sending push notification to " + device.getDeviceIdentifier() + " from add operation method.");
                 }
@@ -466,6 +475,8 @@ public class OperationManagerImpl implements OperationManager {
                     log.error("Error occurred while sending notifications to " + device.getType() +
                             " device carrying id '" + device.getDeviceIdentifier() + "'", e);
                 }
+                PrivilegedCarbonContext.endTenantFlow();
+            });
         }
     }
 

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/push/notification/mgt/task/PushNotificationSchedulerTask.java

@@ -46,7 +46,7 @@ import java.util.Map;
  */
 public class PushNotificationSchedulerTask implements Runnable {
 
-    private static Log log = LogFactory.getLog(PushNotificationSchedulerTask.class);
+    private static final Log log = LogFactory.getLog(PushNotificationSchedulerTask.class);
     private final OperationDAO operationDAO = OperationManagementDAOFactory.getOperationDAO();
     private final OperationMappingDAO operationMappingDAO = OperationManagementDAOFactory.getOperationMappingDAO();
     private final DeviceManagementProviderService provider = DeviceManagementDataHolder.getInstance()

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/mysql.sql

@@ -140,7 +140,7 @@ CREATE TABLE IF NOT EXISTS DM_ENROLMENT_OP_MAPPING (
     DEVICE_ID INTEGER DEFAULT NULL,
     DEVICE_TYPE VARCHAR(300) NOT NULL,
     DEVICE_IDENTIFICATION VARCHAR(300) DEFAULT NULL,
-    TENANT_ID INTEGER DEFAULT 0;
+    TENANT_ID INTEGER DEFAULT 0,
     PRIMARY KEY (ID),
     KEY `fk_dm_device_operation_mapping_operation` (`OPERATION_ID`),
     KEY `IDX_DM_ENROLMENT_OP_MAPPING` (`ENROLMENT_ID`,`OPERATION_ID`),
@@ -677,9 +677,3 @@ ORDER BY TENANT_ID, DEVICE_ID;
 
 -- END OF DASHBOARD RELATED VIEWS --
 
--- TEMP TABLE REQUIRED FOR DATA ARCHIVAL JOB
-CREATE TABLE IF NOT EXISTS DM_ARCHIVED_OPERATIONS (
-    ID INTEGER NOT NULL,
-    CREATED_TIMESTAMP TIMESTAMP NOT NULL,
-    PRIMARY KEY (ID)
-)ENGINE = InnoDB;

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/postgresql.sql

@@ -668,10 +668,3 @@ WHERE
 ORDER BY TENANT_ID, DEVICE_ID;
 
 -- END OF DASHBOARD RELATED VIEWS --
-
--- TEMP TABLE REQUIRED FOR DATA ARCHIVAL JOB
-CREATE TABLE IF NOT EXISTS DM_ARCHIVED_OPERATIONS (
-    ID INTEGER NOT NULL,
-    CREATED_TIMESTAMP TIMESTAMP(0) NOT NULL,
-    PRIMARY KEY (ID)
-);