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Alarms deletion in batches with id offset

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This commit is contained in:
ViacheslavKlimov 2024-04-11 14:07:35 +03:00
parent 49a76cad5a
commit feb629f2c2
12 changed files with 173 additions and 53 deletions
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2
application/src/main/java/org/thingsboard/server/service/housekeeper/HousekeeperService.java
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@ -92,7 +92,7 @@ public class HousekeeperService {
private void processMsgs(List<TbProtoQueueMsg<ToHousekeeperServiceMsg>> msgs, TbQueueConsumer<TbProtoQueueMsg<ToHousekeeperServiceMsg>> consumer) {
for (TbProtoQueueMsg<ToHousekeeperServiceMsg> msg : msgs) {
log.trace("Processing task: {} attempt={}", msg, msg.getValue().getTask().getAttempt());
log.trace("Processing task: {}", msg);
try {
processTask(msg.getValue());
} catch (InterruptedException e) {

39
application/src/main/java/org/thingsboard/server/service/housekeeper/processor/AlarmsDeletionTaskProcessor.java
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@ -19,26 +19,49 @@ import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.thingsboard.server.common.data.EntityType;
import org.thingsboard.server.common.data.housekeeper.HousekeeperTask;
import org.thingsboard.server.common.data.housekeeper.AlarmsDeletionHousekeeperTask;
import org.thingsboard.server.common.data.housekeeper.HousekeeperTaskType;
import org.thingsboard.server.common.data.id.AlarmId;
import org.thingsboard.server.common.data.id.EntityId;
import org.thingsboard.server.common.data.id.TenantId;
import org.thingsboard.server.common.data.id.UUIDBased;
import org.thingsboard.server.dao.DaoUtil;
import org.thingsboard.server.dao.alarm.AlarmService;
import java.util.UUID;
import java.util.stream.Collectors;
@Component
@RequiredArgsConstructor
@Slf4j
public class AlarmsDeletionTaskProcessor extends HousekeeperTaskProcessor<HousekeeperTask> {
public class AlarmsDeletionTaskProcessor extends HousekeeperTaskProcessor<AlarmsDeletionHousekeeperTask> {
private final AlarmService alarmService;
@Override
public void process(HousekeeperTask task) throws Exception {
EntityType entityType = task.getEntityId().getEntityType();
public void process(AlarmsDeletionHousekeeperTask task) throws Exception {
EntityId entityId = task.getEntityId();
EntityType entityType = entityId.getEntityType();
TenantId tenantId = task.getTenantId();
if (entityType == EntityType.DEVICE || entityType == EntityType.ASSET) {
int count = alarmService.deleteAlarmsByOriginatorId(task.getTenantId(), task.getEntityId());
log.debug("[{}][{}][{}] Deleted {} alarms", task.getTenantId(), task.getEntityId().getEntityType(), task.getEntityId(), count);
if (task.getAlarms() == null) {
DaoUtil.iterateWithKeyOffset(pageLink -> {
return alarmService.findAlarmIdsByOriginatorId(tenantId, entityId, pageLink);
}, 128, alarms -> {
housekeeperClient.submitTask(new AlarmsDeletionHousekeeperTask(tenantId, entityId, alarms.stream()
.map(UUIDBased::getId).collect(Collectors.toList())));
log.debug("[{}][{}][{}] Submitted task for deleting {} alarms", tenantId, entityType, entityId, alarms.size());
});
} else {
int count = alarmService.deleteEntityAlarmRecords(task.getTenantId(), task.getEntityId());
log.debug("[{}][{}][{}] Deleted {} entity alarms", task.getTenantId(), task.getEntityId().getEntityType(), task.getEntityId(), count);
for (UUID alarmId : task.getAlarms()) {
alarmService.delAlarm(tenantId, new AlarmId(alarmId));
}
log.debug("[{}][{}][{}] Deleted {} alarms", tenantId, entityType, entityId, task.getAlarms().size());
}
} else {
int count = alarmService.deleteEntityAlarmRecords(tenantId, entityId);
log.debug("[{}][{}][{}] Deleted {} entity alarms", tenantId, entityType, entityId, count);
}
}

60
application/src/test/java/org/thingsboard/server/service/housekeeper/HousekeeperServiceTest.java
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@ -17,25 +17,24 @@ package org.thingsboard.server.service.housekeeper;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.TextNode;
import net.bytebuddy.implementation.bytecode.Throw;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.mockito.ArgumentMatcher;
import org.mockito.Mockito;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.mock.mockito.SpyBean;
import org.springframework.test.context.TestPropertySource;
import org.testcontainers.shaded.org.apache.commons.lang3.RandomStringUtils;
import org.thingsboard.common.util.JacksonUtil;
import org.thingsboard.rule.engine.metadata.TbGetAttributesNode;
import org.thingsboard.rule.engine.metadata.TbGetAttributesNodeConfiguration;
import org.thingsboard.server.common.data.ApiUsageState;
import org.thingsboard.server.common.data.AttributeScope;
import org.thingsboard.server.common.data.DataConstants;
import org.thingsboard.server.common.data.Device;
import org.thingsboard.server.common.data.EventInfo;
import org.thingsboard.server.common.data.alarm.Alarm;
import org.thingsboard.server.common.data.alarm.AlarmQuery;
import org.thingsboard.server.common.data.alarm.AlarmSeverity;
import org.thingsboard.server.common.data.alarm.EntityAlarm;
import org.thingsboard.server.common.data.asset.Asset;
@ -79,7 +78,6 @@ import org.thingsboard.server.dao.timeseries.TimeseriesService;
import org.thingsboard.server.dao.usagerecord.ApiUsageStateDao;
import org.thingsboard.server.gen.transport.TransportProtos.HousekeeperTaskProto;
import org.thingsboard.server.gen.transport.TransportProtos.ToHousekeeperServiceMsg;
import org.thingsboard.server.service.housekeeper.processor.TelemetryDeletionTaskProcessor;
import org.thingsboard.server.service.housekeeper.processor.TsHistoryDeletionTaskProcessor;
import java.util.Arrays;
@ -156,7 +154,7 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
@Test
public void whenDeviceIsDeleted_thenCleanUpRelatedData() throws Exception {
Device device = createDevice("wekfwepf", "wekfwepf");
Device device = createDevice("test", "test");
createRelatedData(device.getId());
doDelete("/api/device/" + device.getId()).andExpect(status().isOk());
@ -187,7 +185,7 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
@Test
public void whenUserIsDeleted_thenCleanUpRelatedData() throws Exception {
Device device = createDevice("vneoruvhwe", "vneoruvhwe");
Device device = createDevice("test", "test");
UserId userId = customerUserId;
createRelatedData(userId);
Alarm alarm = Alarm.builder()
@ -210,6 +208,20 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
});
}
@Test
public void whenDeviceIsDeleted_thenDeleteAllAlarms() throws Exception {
Device device = createDevice("test", "test");
for (int i = 1; i <= 1000; i++) {
createAlarm(device.getId());
}
doDelete("/api/device/" + device.getId()).andExpect(status().isOk());
await().atMost(30, TimeUnit.SECONDS).untilAsserted(() -> {
verifyNoAlarms(device.getId());
});
}
@Test
public void whenTenantIsDeleted_thenDeleteAllEntitiesAndCleanUpRelatedData() throws Exception {
loginDifferentTenant();
@ -220,7 +232,7 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
createRelatedData(differentTenantCustomerId);
loginDifferentTenant();
Device device = createDevice("oi324rujoi", "oi324rujoi");
Device device = createDevice("test", "test");
createRelatedData(device.getId());
Asset asset = createAsset();
@ -258,11 +270,12 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
}
@Test
@Ignore // FIXME !!!
public void whenTaskProcessingFails_thenReprocess() throws Exception {
TimeoutException error = new TimeoutException("Test timeout");
doThrow(error).when(tsHistoryDeletionTaskProcessor).process(any());
Device device = createDevice("vep9ruv32", "vep9ruv32");
Device device = createDevice("test", "test");
createRelatedData(device.getId());
doDelete("/api/device/" + device.getId()).andExpect(status().isOk());
@ -286,11 +299,12 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
}
@Test
@Ignore // FIXME !!!
public void whenReprocessingAttemptsExceeded_thenReprocessOnNextStartUp() throws Exception {
TimeoutException error = new TimeoutException("Test timeout");
doThrow(error).when(tsHistoryDeletionTaskProcessor).process(any());
Device device = createDevice("woeifjiowejf", "woeifjiowejf");
Device device = createDevice("test", "test");
createRelatedData(device.getId());
doDelete("/api/device/" + device.getId()).andExpect(status().isOk());
@ -332,32 +346,31 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
private void createRelatedData(EntityId entityId) throws Exception {
createTelemetry(entityId);
for (AttributeScope scope : List.of(AttributeScope.SERVER_SCOPE, AttributeScope.SHARED_SCOPE, AttributeScope.CLIENT_SCOPE)) {
for (AttributeScope scope : AttributeScope.values()) {
createAttribute(entityId, scope, scope + ATTRIBUTE_KEY);
}
createEvent(entityId);
}
private void verifyNoRelatedData(EntityId entityId) throws Exception {
List<HousekeeperTaskType> expectedTaskTypes = List.of(HousekeeperTaskType.DELETE_TELEMETRY, HousekeeperTaskType.DELETE_ATTRIBUTES, HousekeeperTaskType.DELETE_EVENTS, HousekeeperTaskType.DELETE_ALARMS);
for (HousekeeperTaskType taskType : expectedTaskTypes) {
verify(housekeeperClient).submitTask(argThat(task -> task.getTaskType() == taskType && task.getEntityId().equals(entityId)));
}
assertThat(entityServiceRegistry.getServiceByEntityType(entityId.getEntityType()).findEntity(tenantId, entityId)).isEmpty();
assertThat(getLatestTelemetry(entityId)).isNull();
assertThat(getTimeseriesHistory(entityId)).isEmpty();
for (String scope : List.of(DataConstants.SERVER_SCOPE, DataConstants.SHARED_SCOPE, DataConstants.CLIENT_SCOPE)) {
for (AttributeScope scope : AttributeScope.values()) {
assertThat(attributesService.findAll(tenantId, entityId, scope).get()).isEmpty();
}
assertThat(getEvents(entityId)).isEmpty();
assertThat(alarmDao.findEntityAlarmRecordsByEntityId(tenantId, entityId)).isEmpty();
assertThat(alarmService.findAlarms(tenantId, AlarmQuery.builder().pageLink(new TimePageLink(100)).build()).getData())
.filteredOn(alarm -> alarm.getOriginator().equals(entityId)).isEmpty();
verifyNoAlarms(entityId);
assertThat(relationService.findByTo(tenantId, entityId, RelationTypeGroup.COMMON)).isEmpty();
assertThat(relationService.findByFrom(tenantId, entityId, RelationTypeGroup.COMMON)).isEmpty();
}
private void verifyNoAlarms(EntityId entityId) {
assertThat(alarmService.findAlarmIdsByOriginatorId(tenantId, entityId, new PageLink(1)).getData()).isEmpty();
}
private void createAttribute(EntityId entityId, AttributeScope scope, String key) throws Exception {
attributesService.save(tenantId, entityId, scope, new BaseAttributeKvEntry(System.currentTimeMillis(), new StringDataEntry(key, KV_VALUE))).get();
}
@ -397,8 +410,17 @@ public class HousekeeperServiceTest extends AbstractControllerTest {
List<EntityAlarm> entityAlarms = alarmDao.findEntityAlarmRecords(tenantId, alarm.getId());
assertThat(entityAlarms).anyMatch(entityAlarm -> entityAlarm.getEntityId().equals(deviceId) && entityAlarm.getAlarmType().equals(alarm.getType()));
assertThat(entityAlarms).anyMatch(entityAlarm -> entityAlarm.getEntityId().equals(propagatedEntityId) && entityAlarm.getAlarmType().equals(alarm.getType()));
assertThat(alarmService.findAlarms(tenantId, AlarmQuery.builder().pageLink(new TimePageLink(100)).build()).getData())
.filteredOn(a -> a.getOriginator().equals(deviceId)).isNotEmpty();
assertThat(alarmService.findAlarmIdsByOriginatorId(tenantId, deviceId, new PageLink(1)).getData()).isNotEmpty();
}
private void createAlarm(DeviceId deviceId) {
Alarm alarm = doPost("/api/alarm", Alarm.builder()
.tenantId(tenantId)
.originator(deviceId)
.severity(AlarmSeverity.CRITICAL)
.type("test alarm for " + deviceId + " " + RandomStringUtils.randomAlphabetic(10))
.build(), Alarm.class);
assertThat(alarmService.findAlarmIdsByOriginatorId(tenantId, deviceId, new PageLink(1)).getData()).isNotEmpty();
}
private TsKvEntry getLatestTelemetry(EntityId entityId) throws Exception {

2
common/dao-api/src/main/java/org/thingsboard/server/dao/alarm/AlarmService.java
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@ -81,8 +81,6 @@ public interface AlarmService extends EntityDaoService {
void delAlarmTypes(TenantId tenantId, Set<String> types);
int deleteAlarmsByOriginatorId(TenantId tenantId, EntityId entityId);
// Other API
Alarm findAlarmById(TenantId tenantId, AlarmId alarmId);

46
common/data/src/main/java/org/thingsboard/server/common/data/housekeeper/AlarmsDeletionHousekeeperTask.java Normal file
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@ -0,0 +1,46 @@
/**
* Copyright © 2016-2024 The Thingsboard Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.thingsboard.server.common.data.housekeeper;
import lombok.AccessLevel;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;
import lombok.ToString;
import org.thingsboard.server.common.data.id.EntityId;
import org.thingsboard.server.common.data.id.TenantId;
import java.util.List;
import java.util.UUID;
@Data
@ToString(callSuper = true)
@EqualsAndHashCode(callSuper = true)
@NoArgsConstructor(access = AccessLevel.PROTECTED)
public class AlarmsDeletionHousekeeperTask extends HousekeeperTask {
private List<UUID> alarms;
public AlarmsDeletionHousekeeperTask(TenantId tenantId, EntityId entityId, List<UUID> alarms) {
super(tenantId, entityId, HousekeeperTaskType.DELETE_ALARMS);
this.alarms = alarms;
}
public AlarmsDeletionHousekeeperTask(TenantId tenantId, EntityId entityId) {
super(tenantId, entityId, HousekeeperTaskType.DELETE_ALARMS);
}
}

3
common/data/src/main/java/org/thingsboard/server/common/data/housekeeper/HousekeeperTask.java
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@ -37,6 +37,7 @@ import java.io.Serializable;
@Type(name = "DELETE_TS_HISTORY", value = TsHistoryDeletionHousekeeperTask.class),
@Type(name = "DELETE_LATEST_TS", value = LatestTsDeletionHousekeeperTask.class),
@Type(name = "DELETE_ENTITIES", value = EntitiesDeletionHousekeeperTask.class),
@Type(name = "DELETE_ALARMS", value = AlarmsDeletionHousekeeperTask.class),
@Type(name = "UNASSIGN_ALARMS", value = AlarmsUnassignHousekeeperTask.class)
})
@Data
@ -81,7 +82,7 @@ public class HousekeeperTask implements Serializable {
}
public static HousekeeperTask deleteAlarms(TenantId tenantId, EntityId entityId) {
return new HousekeeperTask(tenantId, entityId, HousekeeperTaskType.DELETE_ALARMS);
return new AlarmsDeletionHousekeeperTask(tenantId, entityId);
}
public static HousekeeperTask deleteEntities(TenantId tenantId, EntityType entityType) {

6
common/data/src/main/java/org/thingsboard/server/common/data/page/PageLink.java
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@ -16,15 +16,20 @@
package org.thingsboard.server.common.data.page;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import org.springframework.data.domain.Sort;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.stream.Collectors;
@Data
@AllArgsConstructor
@Builder
public class PageLink {
protected static final String DEFAULT_SORT_PROPERTY = "id";
@ -34,6 +39,7 @@ public class PageLink {
private final int pageSize;
private final int page;
private final SortOrder sortOrder;
private UUID idOffset;
public PageLink(PageLink pageLink) {
this.pageSize = pageLink.getPageSize();

4
common/data/src/main/java/org/thingsboard/server/common/data/page/SortOrder.java
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@ -32,6 +32,10 @@ public class SortOrder {
this.direction = direction;
}
public static SortOrder of(String property, Direction direction) {
return new SortOrder(property, direction);
}
public static enum Direction {
ASC, DESC
}

35
dao/src/main/java/org/thingsboard/server/dao/DaoUtil.java
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@ -18,10 +18,12 @@ package org.thingsboard.server.dao;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Slice;
import org.springframework.util.CollectionUtils;
import org.thingsboard.server.common.data.EntityInfo;
import org.thingsboard.server.common.data.EntitySubtype;
import org.thingsboard.server.common.data.EntityType;
import org.thingsboard.server.common.data.id.EntityId;
import org.thingsboard.server.common.data.id.TenantId;
import org.thingsboard.server.common.data.id.UUIDBased;
import org.thingsboard.server.common.data.page.PageData;
@ -51,8 +53,17 @@ public abstract class DaoUtil {
return new PageData<>(data, page.getTotalPages(), page.getTotalElements(), page.hasNext());
}
public static <T> PageData<T> pageToPageData(Page<T> page) {
return new PageData<>(page.getContent(), page.getTotalPages(), page.getTotalElements(), page.hasNext());
public static <T> PageData<T> pageToPageData(Slice<T> slice) {
int totalPages;
long totalElements;
if (slice instanceof Page<T> page) {
totalPages = page.getTotalPages();
totalElements = page.getTotalElements();
} else {
totalPages = 0;
totalElements = 0;
}
return new PageData<>(slice.getContent(), totalPages, totalElements, slice.hasNext());
}
public static Pageable toPageable(PageLink pageLink) {
@ -158,6 +169,26 @@ public abstract class DaoUtil {
} while (hasNextBatch);
}
public static <T extends EntityId> void iterateWithKeyOffset(Function<PageLink, PageData<T>> findFunction, int pageSize, Consumer<List<T>> processor) {
List<T> data;
UUID last = null;
while (true) {
PageLink pageLink = PageLink.builder()
.pageSize(pageSize)
.sortOrder(SortOrder.of("id", SortOrder.Direction.ASC))
.idOffset(last)
.build();
data = findFunction.apply(pageLink).getData();
if (!data.isEmpty()) {
processor.accept(data);
last = data.get(data.size() - 1).getId();
} else {
break;
}
}
}
public static String getStringId(UUIDBased id) {
if (id != null) {
return id.toString();

16
dao/src/main/java/org/thingsboard/server/dao/alarm/BaseAlarmService.java
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@ -51,7 +51,6 @@ import org.thingsboard.server.common.data.id.UserId;
import org.thingsboard.server.common.data.page.PageData;
import org.thingsboard.server.common.data.page.PageLink;
import org.thingsboard.server.common.data.page.SortOrder;
import org.thingsboard.server.common.data.page.TimePageLink;
import org.thingsboard.server.common.data.query.AlarmCountQuery;
import org.thingsboard.server.common.data.query.AlarmData;
import org.thingsboard.server.common.data.query.AlarmDataQuery;
@ -215,21 +214,6 @@ public class BaseAlarmService extends AbstractCachedEntityService<TenantId, Page
}
}
@Override
public int deleteAlarmsByOriginatorId(TenantId tenantId, EntityId entityId) {
TimePageLink pageLink = new TimePageLink(256);
PageData<AlarmId> alarms;
int count = 0;
do {
alarms = alarmService.findAlarmIdsByOriginatorId(tenantId, entityId, pageLink);
for (AlarmId alarmId : alarms.getData()) {
delAlarm(tenantId, alarmId);
count++;
}
} while (alarms.hasNext());
return count;
}
private List<EntityId> createEntityAlarmRecords(Alarm alarm) throws ExecutionException, InterruptedException {
Set<EntityId> propagatedEntitiesSet = new LinkedHashSet<>();
propagatedEntitiesSet.add(alarm.getOriginator());

11
dao/src/main/java/org/thingsboard/server/dao/sql/alarm/AlarmRepository.java
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@ -17,13 +17,13 @@ package org.thingsboard.server.dao.sql.alarm;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Slice;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.transaction.annotation.Transactional;
import org.thingsboard.server.common.data.alarm.AlarmSeverity;
import org.thingsboard.server.common.data.id.TenantId;
import org.thingsboard.server.dao.model.sql.AlarmEntity;
import org.thingsboard.server.dao.model.sql.AlarmInfoEntity;
@ -333,8 +333,13 @@ public interface AlarmRepository extends JpaRepository<AlarmEntity, UUID> {
@Query("SELECT a.id FROM AlarmEntity a WHERE a.tenantId = :tenantId AND a.assigneeId = :assigneeId")
Page<UUID> findAlarmIdsByAssigneeId(@Param("tenantId") UUID tenantId, @Param("assigneeId") UUID assigneeId, Pageable pageable);
@Query("SELECT a.id FROM AlarmEntity a WHERE a.tenantId = :tenantId AND a.originatorId = :originatorId")
Page<UUID> findAlarmIdsByOriginatorId(@Param("tenantId") UUID tenantId, @Param("originatorId") UUID originatorId, Pageable pageable);
// using Slice so that count query is not executed
@Query(value = "SELECT id FROM alarm WHERE tenant_id = :tenantId AND originator_id = :originatorId " +
"AND (cast(:idOffset as uuid) IS NULL OR id > cast(:idOffset as uuid))", nativeQuery = true)
Slice<UUID> findAlarmIdsByOriginatorId(@Param("tenantId") UUID tenantId,
@Param("originatorId") UUID originatorId,
@Param("idOffset") UUID idOffset,
Pageable pageable);
@Query(value = "SELECT create_or_update_active_alarm(:t_id, :c_id, :a_id, :a_created_ts, :a_o_id, :a_o_type, :a_type, :a_severity, " +
":a_start_ts, :a_end_ts, :a_details, :a_propagate, :a_propagate_to_owner, " +

2
dao/src/main/java/org/thingsboard/server/dao/sql/alarm/JpaAlarmDao.java
View File

@ -298,7 +298,7 @@ public class JpaAlarmDao extends JpaAbstractDao<AlarmEntity, Alarm> implements A
@Override
public PageData<AlarmId> findAlarmIdsByOriginatorId(TenantId tenantId, EntityId originatorId, PageLink pageLink) {
return DaoUtil.pageToPageData(alarmRepository.findAlarmIdsByOriginatorId(tenantId.getId(), originatorId.getId(), DaoUtil.toPageable(pageLink)))
return DaoUtil.pageToPageData(alarmRepository.findAlarmIdsByOriginatorId(tenantId.getId(), originatorId.getId(), pageLink.getIdOffset(), DaoUtil.toPageable(pageLink)))
.mapData(AlarmId::new);
}