Recipient preview for notification request; template params functions

application/src/main/java/org/thingsboard/server/controller/NotificationController.java

@@ -31,6 +31,7 @@ import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import org.thingsboard.rule.engine.api.NotificationCenter;
 import org.thingsboard.server.common.data.EntityType;
+import org.thingsboard.server.common.data.User;
 import org.thingsboard.server.common.data.exception.ThingsboardException;
 import org.thingsboard.server.common.data.id.NotificationId;
 import org.thingsboard.server.common.data.id.NotificationRequestId;
@@ -38,7 +39,7 @@ import org.thingsboard.server.common.data.id.NotificationTargetId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.notification.Notification;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
-import org.thingsboard.server.common.data.notification.NotificationProcessingContext;
+import org.thingsboard.server.service.notification.NotificationProcessingContext;
 import org.thingsboard.server.common.data.notification.NotificationRequest;
 import org.thingsboard.server.common.data.notification.NotificationRequestInfo;
 import org.thingsboard.server.common.data.notification.NotificationRequestPreview;
@@ -62,8 +63,10 @@ import org.thingsboard.server.service.security.permission.Operation;
 import javax.validation.Valid;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
 import java.util.stream.Collectors;
 
@@ -196,6 +199,7 @@ public class NotificationController extends BaseController {
     @PostMapping("/notification/request/preview")
     @PreAuthorize("hasAnyAuthority('SYS_ADMIN', 'TENANT_ADMIN')")
     public NotificationRequestPreview getNotificationRequestPreview(@RequestBody @Valid NotificationRequest request,
+                                                                    @RequestParam(defaultValue = "20") int recipientsPreviewSize,
                                                                     @AuthenticationPrincipal SecurityUser user) throws ThingsboardException {
         NotificationRequestPreview preview = new NotificationRequestPreview();
 
@@ -229,18 +233,29 @@ public class NotificationController extends BaseController {
         preview.setProcessedTemplates(processedTemplates);
 
         // generic permission
+        Set<User> recipientsPreview = new LinkedHashSet<>();
         Map<String, Integer> recipientsCountByTarget = new HashMap<>();
         List<NotificationTarget> targets = notificationTargetService.findNotificationTargetsByTenantIdAndIds(user.getTenantId(),
                 request.getTargets().stream().map(NotificationTargetId::new).collect(Collectors.toList()));
         for (NotificationTarget target : targets) {
             int recipientsCount;
             if (target.getConfiguration().getType() == NotificationTargetType.PLATFORM_USERS) {
-                recipientsCount = notificationTargetService.countRecipientsForNotificationTargetConfig(user.getTenantId(), target.getConfiguration());
+                PageData<User> recipients = notificationTargetService.findRecipientsForNotificationTargetConfig(user.getTenantId(), null,
+                        target.getConfiguration(), new PageLink(recipientsPreviewSize));
+                recipientsCount = (int) recipients.getTotalElements();
+                for (User recipient : recipients.getData()) {
+                    if (recipientsPreview.size() < recipientsPreviewSize) {
+                        recipientsPreview.add(recipient);
+                    } else {
+                        break;
+                    }
+                }
             } else {
                 recipientsCount = 1;
             }
             recipientsCountByTarget.put(target.getName(), recipientsCount);
         }
+        preview.setRecipientsPreview(recipientsPreview);
         preview.setRecipientsCountByTarget(recipientsCountByTarget);
         preview.setTotalRecipientsCount(recipientsCountByTarget.values().stream().mapToInt(Integer::intValue).sum());
 

application/src/main/java/org/thingsboard/server/service/notification/DefaultNotificationCenter.java

@@ -33,7 +33,6 @@ import org.thingsboard.server.common.data.id.UserId;
 import org.thingsboard.server.common.data.notification.AlreadySentException;
 import org.thingsboard.server.common.data.notification.Notification;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
-import org.thingsboard.server.common.data.notification.NotificationProcessingContext;
 import org.thingsboard.server.common.data.notification.NotificationRequest;
 import org.thingsboard.server.common.data.notification.NotificationRequestConfig;
 import org.thingsboard.server.common.data.notification.NotificationRequestStats;

common/data/src/main/java/org/thingsboard/server/common/data/notification/NotificationProcessingContext.java → application/src/main/java/org/thingsboard/server/service/notification/NotificationProcessingContext.java

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.thingsboard.server.common.data.notification;
+package org.thingsboard.server.service.notification;
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
@@ -25,6 +25,9 @@ import org.apache.commons.lang3.StringUtils;
 import org.thingsboard.server.common.data.User;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
+import org.thingsboard.server.common.data.notification.NotificationRequest;
+import org.thingsboard.server.common.data.notification.NotificationRequestStats;
 import org.thingsboard.server.common.data.notification.info.NotificationInfo;
 import org.thingsboard.server.common.data.notification.info.RuleOriginatedNotificationInfo;
 import org.thingsboard.server.common.data.notification.settings.NotificationDeliveryMethodConfig;
@@ -40,6 +43,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
+import java.util.regex.Pattern;
 
 @SuppressWarnings("unchecked")
 public class NotificationProcessingContext {
@@ -58,6 +62,8 @@ public class NotificationProcessingContext {
     @Getter
     private final NotificationRequestStats stats;
 
+    private static final Pattern TEMPLATE_PARAM_PATTERN = Pattern.compile("\\$\\{([a-zA-Z]+)(:[a-zA-Z]+)?}");
+
     @Builder
     public NotificationProcessingContext(TenantId tenantId, NotificationRequest request, NotificationSettings settings,
                                          NotificationTemplate template) {
@@ -111,7 +117,7 @@ public class NotificationProcessingContext {
                 }
                 JsonNode link = buttonConfig.get().get("link");
                 if (link != null && link.isTextual()) {
-                    link = new TextNode(processTemplate(link.asText(), templateContext).toLowerCase());
+                    link = new TextNode(processTemplate(link.asText(), templateContext));
                     buttonConfig.get().set("link", link);
                 }
             }
@@ -120,19 +126,22 @@ public class NotificationProcessingContext {
     }
 
     private static String processTemplate(String template, Map<String, String> context) {
-        if (template == null) return null;
+        return TEMPLATE_PARAM_PATTERN.matcher(template).replaceAll(matchResult -> {
-        String result = template;
+            String key = matchResult.group(1);
-        for (Map.Entry<String, String> kv : context.entrySet()) {
+            String value = Strings.nullToEmpty(context.get(key));
-            String value = Strings.nullToEmpty(kv.getValue());
+            String function = matchResult.group(2);
-            result = result.replace("${" + kv.getKey() + '}', value);
+            if (function != null) {
-        }
+                switch (function) {
-        return result;
+                    case ":upperCase":
-    }
+                        return value.toUpperCase();
-
+                    case ":lowerCase":
-    public static String processTemplate(String template, NotificationInfo notificationInfo) {
+                        return value.toLowerCase();
-        if (notificationInfo == null) return template;
+                    case ":capitalize":
-        Map<String, String> templateContext = notificationInfo.getTemplateData();
+                        return StringUtils.capitalize(value.toLowerCase());
-        return processTemplate(template, templateContext);
+                }
+            }
+            return value;
+        });
     }
 
     public Map<String, String> createTemplateContext(User recipient) {

application/src/main/java/org/thingsboard/server/service/notification/channels/EmailNotificationChannel.java

@@ -23,7 +23,7 @@ import org.thingsboard.server.common.data.User;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
 import org.thingsboard.server.common.data.notification.template.EmailDeliveryMethodNotificationTemplate;
 import org.thingsboard.server.service.mail.MailExecutorService;
-import org.thingsboard.server.common.data.notification.NotificationProcessingContext;
+import org.thingsboard.server.service.notification.NotificationProcessingContext;
 
 @Component
 @RequiredArgsConstructor

application/src/main/java/org/thingsboard/server/service/notification/channels/NotificationChannel.java

@@ -17,7 +17,7 @@ package org.thingsboard.server.service.notification.channels;
 
 import com.google.common.util.concurrent.ListenableFuture;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
-import org.thingsboard.server.common.data.notification.NotificationProcessingContext;
+import org.thingsboard.server.service.notification.NotificationProcessingContext;
 import org.thingsboard.server.common.data.notification.targets.NotificationRecipient;
 import org.thingsboard.server.common.data.notification.template.DeliveryMethodNotificationTemplate;
 

application/src/main/java/org/thingsboard/server/service/notification/channels/SlackNotificationChannel.java

@@ -20,7 +20,7 @@ import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
 import org.thingsboard.rule.engine.api.slack.SlackService;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
-import org.thingsboard.server.common.data.notification.NotificationProcessingContext;
+import org.thingsboard.server.service.notification.NotificationProcessingContext;
 import org.thingsboard.server.common.data.notification.settings.SlackNotificationDeliveryMethodConfig;
 import org.thingsboard.server.common.data.notification.targets.slack.SlackConversation;
 import org.thingsboard.server.common.data.notification.template.SlackDeliveryMethodNotificationTemplate;

application/src/main/java/org/thingsboard/server/service/notification/channels/SmsNotificationChannel.java

@@ -24,7 +24,7 @@ import org.thingsboard.rule.engine.api.SmsService;
 import org.thingsboard.server.common.data.User;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
 import org.thingsboard.server.common.data.notification.template.SmsDeliveryMethodNotificationTemplate;
-import org.thingsboard.server.common.data.notification.NotificationProcessingContext;
+import org.thingsboard.server.service.notification.NotificationProcessingContext;
 import org.thingsboard.server.service.sms.SmsExecutorService;
 
 @Component

application/src/test/java/org/thingsboard/server/service/notification/AbstractNotificationApiTest.java

@@ -132,7 +132,6 @@ public abstract class AbstractNotificationApiTest extends AbstractControllerTest
         notificationTemplate.setName("Notification template: " + text);
         notificationTemplate.setNotificationType(notificationType);
         NotificationTemplateConfig config = new NotificationTemplateConfig();
-        config.setDefaultTextTemplate(text);
         config.setDeliveryMethodsTemplates(new HashMap<>());
         for (NotificationDeliveryMethod deliveryMethod : deliveryMethods) {
             DeliveryMethodNotificationTemplate deliveryMethodNotificationTemplate;
@@ -157,6 +156,7 @@ public abstract class AbstractNotificationApiTest extends AbstractControllerTest
                     throw new IllegalArgumentException("Unsupported delivery method " + deliveryMethod);
             }
             deliveryMethodNotificationTemplate.setEnabled(true);
+            deliveryMethodNotificationTemplate.setBody(text);
             config.getDeliveryMethodsTemplates().put(deliveryMethod, deliveryMethodNotificationTemplate);
         }
         notificationTemplate.setConfiguration(config);

application/src/test/java/org/thingsboard/server/service/notification/NotificationApiTest.java

@@ -25,6 +25,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.thingsboard.rule.engine.api.NotificationCenter;
 import org.thingsboard.server.common.data.User;
 import org.thingsboard.server.common.data.id.NotificationTargetId;
+import org.thingsboard.server.common.data.id.UserId;
 import org.thingsboard.server.common.data.notification.Notification;
 import org.thingsboard.server.common.data.notification.NotificationDeliveryMethod;
 import org.thingsboard.server.common.data.notification.NotificationRequest;
@@ -339,6 +340,8 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
         target1Config.setUsersFilter(userListFilter);
         target1.setConfiguration(target1Config);
         target1 = saveNotificationTarget(target1);
+        List<UserId> recipients = new ArrayList<>();
+        recipients.add(tenantAdminUserId);
 
         createDifferentCustomer();
         loginTenantAdmin();
@@ -350,6 +353,7 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
             customerUser.setCustomerId(differentCustomerId);
             customerUser.setEmail("other-customer-" + i + "@thingsboard.org");
             customerUser = createUser(customerUser, "12345678");
+            recipients.add(customerUser.getId());
         }
         NotificationTarget target2 = new NotificationTarget();
         target2.setName("Other customer users");
@@ -367,27 +371,25 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
 
         String requestorEmail = TENANT_ADMIN_EMAIL;
         NotificationTemplateConfig templateConfig = new NotificationTemplateConfig();
-        templateConfig.setDefaultTextTemplate("Default message for SMS and WEB: ${recipientEmail}");
-        templateConfig.setNotificationSubject("Default subject for EMAIL: ${recipientEmail}");
         HashMap<NotificationDeliveryMethod, DeliveryMethodNotificationTemplate> templates = new HashMap<>();
         templateConfig.setDeliveryMethodsTemplates(templates);
         notificationTemplate.setConfiguration(templateConfig);
 
         WebDeliveryMethodNotificationTemplate webNotificationTemplate = new WebDeliveryMethodNotificationTemplate();
         webNotificationTemplate.setEnabled(true);
-        // using default message for web
+        webNotificationTemplate.setBody("Message for WEB: ${recipientEmail}");
         webNotificationTemplate.setSubject("Subject for WEB: ${recipientEmail}");
         templates.put(NotificationDeliveryMethod.WEB, webNotificationTemplate);
 
         SmsDeliveryMethodNotificationTemplate smsNotificationTemplate = new SmsDeliveryMethodNotificationTemplate();
         smsNotificationTemplate.setEnabled(true);
-        // using default message for sms
+        smsNotificationTemplate.setBody("Message for SMS: ${recipientEmail}");
         templates.put(NotificationDeliveryMethod.SMS, smsNotificationTemplate);
 
         EmailDeliveryMethodNotificationTemplate emailNotificationTemplate = new EmailDeliveryMethodNotificationTemplate();
         emailNotificationTemplate.setEnabled(true);
+        emailNotificationTemplate.setSubject("Subject for EMAIL: ${recipientEmail}");
         emailNotificationTemplate.setBody("Message for EMAIL: ${recipientEmail}");
-        // using default subject for email
         templates.put(NotificationDeliveryMethod.EMAIL, emailNotificationTemplate);
 
         SlackDeliveryMethodNotificationTemplate slackNotificationTemplate = new SlackDeliveryMethodNotificationTemplate();
@@ -407,12 +409,13 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
         assertThat(preview.getRecipientsCountByTarget().get(target1.getName())).isEqualTo(1);
         assertThat(preview.getRecipientsCountByTarget().get(target2.getName())).isEqualTo(customerUsersCount);
         assertThat(preview.getTotalRecipientsCount()).isEqualTo(1 + customerUsersCount);
+        assertThat(preview.getRecipientsPreview()).extracting(User::getId).containsAll(recipients);
 
         Map<NotificationDeliveryMethod, DeliveryMethodNotificationTemplate> processedTemplates = preview.getProcessedTemplates();
         assertThat(processedTemplates.get(NotificationDeliveryMethod.WEB)).asInstanceOf(type(WebDeliveryMethodNotificationTemplate.class))
                 .satisfies(template -> {
                     assertThat(template.getBody())
-                            .startsWith("Default message for SMS and WEB")
+                            .startsWith("Message for WEB")
                             .endsWith(requestorEmail);
                     assertThat(template.getSubject())
                             .startsWith("Subject for WEB")
@@ -421,7 +424,7 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
         assertThat(processedTemplates.get(NotificationDeliveryMethod.SMS)).asInstanceOf(type(SmsDeliveryMethodNotificationTemplate.class))
                 .satisfies(template -> {
                     assertThat(template.getBody())
-                            .startsWith("Default message for SMS and WEB")
+                            .startsWith("Message for SMS")
                             .endsWith(requestorEmail);
                 });
         assertThat(processedTemplates.get(NotificationDeliveryMethod.EMAIL)).asInstanceOf(type(EmailDeliveryMethodNotificationTemplate.class))
@@ -430,7 +433,7 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
                             .startsWith("Message for EMAIL")
                             .endsWith(requestorEmail);
                     assertThat(template.getSubject())
-                            .startsWith("Default subject for EMAIL")
+                            .startsWith("Subject for EMAIL")
                             .endsWith(requestorEmail);
                 });
         assertThat(processedTemplates.get(NotificationDeliveryMethod.SLACK)).asInstanceOf(type(SlackDeliveryMethodNotificationTemplate.class))
@@ -534,9 +537,9 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
         notificationTemplate.setName("Slack notification template");
         notificationTemplate.setNotificationType(NotificationType.GENERAL);
         NotificationTemplateConfig config = new NotificationTemplateConfig();
-        config.setDefaultTextTemplate("To Slack :)  ${recipientEmail}");
         SlackDeliveryMethodNotificationTemplate slackNotificationTemplate = new SlackDeliveryMethodNotificationTemplate();
         slackNotificationTemplate.setEnabled(true);
+        slackNotificationTemplate.setBody("To Slack :)  ${recipientEmail}");
         config.setDeliveryMethodsTemplates(Map.of(
                 NotificationDeliveryMethod.SLACK, slackNotificationTemplate
         ));
@@ -556,7 +559,7 @@ public class NotificationApiTest extends AbstractNotificationApiTest {
         NotificationRequest successfulNotificationRequest = submitNotificationRequest(List.of(notificationTarget.getId()), notificationTemplate.getId(), 0);
         await().atMost(2, TimeUnit.SECONDS)
                 .until(() -> findNotificationRequest(successfulNotificationRequest.getId()).isSent());
-        verify(slackService).sendMessage(eq(tenantId), eq(slackToken), eq(conversationId), eq(config.getDefaultTextTemplate()));
+        verify(slackService).sendMessage(eq(tenantId), eq(slackToken), eq(conversationId), eq(slackNotificationTemplate.getBody()));
         NotificationRequestStats stats = getStats(successfulNotificationRequest.getId());
         assertThat(stats.getSent().get(NotificationDeliveryMethod.SLACK)).hasValue(1);
 

application/src/test/java/org/thingsboard/server/service/notification/NotificationRuleApiTest.java

@@ -75,6 +75,8 @@ import org.thingsboard.server.common.data.script.ScriptLanguage;
 import org.thingsboard.server.common.data.security.Authority;
 import org.thingsboard.server.dao.alarm.AlarmService;
 import org.thingsboard.server.dao.notification.NotificationRequestService;
+import org.thingsboard.server.dao.notification.NotificationRuleService;
+import org.thingsboard.server.dao.notification.NotificationTemplateService;
 import org.thingsboard.server.dao.service.DaoSqlTest;
 import org.thingsboard.server.service.telemetry.AlarmSubscriptionService;
 
@@ -103,6 +105,10 @@ public class NotificationRuleApiTest extends AbstractNotificationApiTest {
     private AlarmSubscriptionService alarmSubscriptionService;
     @Autowired
     private NotificationRequestService notificationRequestService;
+    @Autowired
+    private NotificationRuleService notificationRuleService;
+    @Autowired
+    private NotificationTemplateService notificationTemplateService;
 
     @SpyBean
     private AlarmService alarmService;
@@ -110,7 +116,8 @@ public class NotificationRuleApiTest extends AbstractNotificationApiTest {
     @Before
     public void beforeEach() throws Exception {
         loginTenantAdmin();
-
+        notificationRuleService.deleteNotificationRulesByTenantId(tenantId);
+        notificationTemplateService.deleteNotificationTemplatesByTenantId(tenantId);
     }
 
     @Test
@@ -226,7 +233,7 @@ public class NotificationRuleApiTest extends AbstractNotificationApiTest {
             assertThat(actualDelay).isCloseTo(expectedDelay, offset(0.5));
 
             AlarmStatus expectedStatus = AlarmStatus.ACTIVE_UNACK;
-            AlarmSeverity expectedSeverity = AlarmSeverity.CRITICAL;
+            String expectedSeverity = AlarmSeverity.CRITICAL.toString().toLowerCase();
 
             assertThat(notification.getSubject()).isEqualTo("Alarm type: " + alarmType + ", status: " + expectedStatus + ", " +
                     "severity: " + expectedSeverity + ", deviceId: " + device.getId());
@@ -304,7 +311,7 @@ public class NotificationRuleApiTest extends AbstractNotificationApiTest {
         getWsClient().waitForUpdate(true);
 
         Notification notification = getWsClient().getLastDataUpdate().getUpdate();
-        assertThat(notification.getSubject()).isEqualTo("CRITICAL alarm '" + alarmType + "' is ACTIVE_UNACK");
+        assertThat(notification.getSubject()).isEqualTo("critical alarm '" + alarmType + "' is ACTIVE_UNACK");
         assertThat(notification.getInfo()).asInstanceOf(type(AlarmNotificationInfo.class))
                 .extracting(AlarmNotificationInfo::getAlarmId).isEqualTo(alarm.getUuidId());
 
@@ -323,48 +330,6 @@ public class NotificationRuleApiTest extends AbstractNotificationApiTest {
         assertThat(findNotificationRequests(EntityType.ALARM).getData()).filteredOn(NotificationRequest::isScheduled).isEmpty();
     }
 
-    @Test
-    public void testNotificationRuleProcessing_ruleEngineComponentLifecycleEvent_ruleNodeStartError() {
-        String subject = "Rule Node '${componentName}' in Rule Chain '${ruleChainName}' failed to start";
-        String text = "The error: ${error}";
-        NotificationTemplate template = createNotificationTemplate(NotificationType.RULE_ENGINE_COMPONENT_LIFECYCLE_EVENT, subject, text, NotificationDeliveryMethod.WEB);
-
-        NotificationRule rule = new NotificationRule();
-        rule.setName("Rule node start-up failures in my rule chain");
-        rule.setTemplateId(template.getId());
-        rule.setTriggerType(NotificationRuleTriggerType.RULE_ENGINE_COMPONENT_LIFECYCLE_EVENT);
-
-        RuleChain ruleChain = createEmptyRuleChain("My Rule Chain");
-        var triggerConfig = new RuleEngineComponentLifecycleEventNotificationRuleTriggerConfig();
-        triggerConfig.setRuleChains(Set.of(ruleChain.getUuidId()));
-        triggerConfig.setRuleChainEvents(Set.of(ComponentLifecycleEvent.STARTED));
-        triggerConfig.setOnlyRuleChainLifecycleFailures(true);
-
-        triggerConfig.setTrackRuleNodeEvents(true);
-        triggerConfig.setRuleNodeEvents(Set.of(ComponentLifecycleEvent.STARTED));
-        triggerConfig.setOnlyRuleNodeLifecycleFailures(true);
-        rule.setTriggerConfig(triggerConfig);
-
-        NotificationTarget target = createNotificationTarget(tenantAdminUserId);
-        DefaultNotificationRuleRecipientsConfig recipientsConfig = new DefaultNotificationRuleRecipientsConfig();
-        recipientsConfig.setTriggerType(NotificationRuleTriggerType.RULE_ENGINE_COMPONENT_LIFECYCLE_EVENT);
-        recipientsConfig.setTargets(List.of(target.getUuidId()));
-        rule.setRecipientsConfig(recipientsConfig);
-        rule = saveNotificationRule(rule);
-
-        getWsClient().subscribeForUnreadNotifications(10).waitForReply(true);
-        getWsClient().registerWaitForUpdate();
-
-        addRuleNodeWithError(ruleChain.getId(), "My generator");
-
-        getWsClient().waitForUpdate(10000, true);
-        Notification notification = getWsClient().getLastDataUpdate().getUpdate();
-
-        assertThat(notification.getType()).isEqualTo(NotificationType.RULE_ENGINE_COMPONENT_LIFECYCLE_EVENT);
-        assertThat(notification.getSubject()).isEqualTo("Rule Node 'My generator' in Rule Chain 'My Rule Chain' failed to start");
-        assertThat(notification.getText()).startsWith("The error: Can't compile script");
-    }
-
     @Test
     public void testNotificationRuleInfo() throws Exception {
         NotificationDeliveryMethod[] deliveryMethods = {NotificationDeliveryMethod.WEB, NotificationDeliveryMethod.EMAIL};

application/src/test/java/org/thingsboard/server/service/notification/NotificationTemplateApiTest.java

@@ -19,6 +19,7 @@ import com.fasterxml.jackson.core.type.TypeReference;
 import org.apache.commons.lang3.StringUtils;
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.web.servlet.ResultActions;
 import org.springframework.test.web.servlet.ResultMatcher;
 import org.thingsboard.server.common.data.id.IdBased;
@@ -29,6 +30,8 @@ import org.thingsboard.server.common.data.notification.template.NotificationTemp
 import org.thingsboard.server.common.data.notification.template.NotificationTemplateConfig;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
+import org.thingsboard.server.dao.notification.NotificationRuleService;
+import org.thingsboard.server.dao.notification.NotificationTemplateService;
 import org.thingsboard.server.dao.service.DaoSqlTest;
 
 import java.util.List;
@@ -40,9 +43,16 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 @DaoSqlTest
 public class NotificationTemplateApiTest extends AbstractNotificationApiTest {
 
+    @Autowired
+    private NotificationTemplateService templateService;
+    @Autowired
+    private NotificationRuleService notificationRuleService;
+
     @Before
     public void beforeEach() throws Exception {
         loginTenantAdmin();
+        notificationRuleService.deleteNotificationRulesByTenantId(tenantId);
+        templateService.deleteNotificationTemplatesByTenantId(tenantId);
     }
 
     @Test
@@ -61,8 +71,6 @@ public class NotificationTemplateApiTest extends AbstractNotificationApiTest {
 
         NotificationTemplateConfig config = new NotificationTemplateConfig();
         notificationTemplate.setConfiguration(config);
-        config.setDefaultTextTemplate("Default text");
-        config.setNotificationSubject(null);
         EmailDeliveryMethodNotificationTemplate emailTemplate = new EmailDeliveryMethodNotificationTemplate();
         emailTemplate.setEnabled(true);
         emailTemplate.setBody(null);
@@ -74,14 +82,9 @@ public class NotificationTemplateApiTest extends AbstractNotificationApiTest {
 
         validationError = saveAndGetError(notificationTemplate, status().isBadRequest());
         assertThat(validationError)
-                .contains("notificationSubject must be")
+                .contains("subject must not be")
+                .contains("body must not be")
                 .contains("name is malformed");
-
-        config.setDefaultTextTemplate(null);
-
-        validationError = saveAndGetError(notificationTemplate, status().isBadRequest());
-        assertThat(validationError)
-                .contains("defaultTextTemplate").contains("must be specified");
     }
 
     @Test

common/data/src/main/java/org/thingsboard/server/common/data/notification/NotificationRequestPreview.java

@@ -16,8 +16,10 @@
 package org.thingsboard.server.common.data.notification;
 
 import lombok.Data;
+import org.thingsboard.server.common.data.User;
 import org.thingsboard.server.common.data.notification.template.DeliveryMethodNotificationTemplate;
 
+import java.util.Collection;
 import java.util.Map;
 
 @Data
@@ -26,5 +28,6 @@ public class NotificationRequestPreview {
     private Map<NotificationDeliveryMethod, DeliveryMethodNotificationTemplate> processedTemplates;
     private int totalRecipientsCount;
     private Map<String, Integer> recipientsCountByTarget;
+    private Collection<User> recipientsPreview;
 
 }