Java tutorial
/** * Copyright 2016-2017 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.dao.alarm; import com.datastax.driver.core.querybuilder.QueryBuilder; import com.datastax.driver.core.querybuilder.Select; import com.google.common.base.Function; import com.google.common.util.concurrent.AsyncFunction; import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.thingsboard.server.common.data.EntityType; import org.thingsboard.server.common.data.alarm.Alarm; import org.thingsboard.server.common.data.alarm.AlarmInfo; import org.thingsboard.server.common.data.alarm.AlarmQuery; import org.thingsboard.server.common.data.alarm.AlarmSearchStatus; import org.thingsboard.server.common.data.id.EntityId; import org.thingsboard.server.common.data.id.TenantId; import org.thingsboard.server.common.data.relation.EntityRelation; import org.thingsboard.server.common.data.relation.RelationTypeGroup; import org.thingsboard.server.dao.AbstractModelDao; import org.thingsboard.server.dao.AbstractSearchTimeDao; import org.thingsboard.server.dao.model.AlarmEntity; import org.thingsboard.server.dao.model.ModelConstants; import org.thingsboard.server.dao.relation.RelationDao; import java.util.ArrayList; import java.util.List; import java.util.UUID; import static com.datastax.driver.core.querybuilder.QueryBuilder.eq; import static com.datastax.driver.core.querybuilder.QueryBuilder.select; import static org.thingsboard.server.dao.model.ModelConstants.*; @Component @Slf4j public class AlarmDaoImpl extends AbstractModelDao<AlarmEntity> implements AlarmDao { @Autowired private RelationDao relationDao; @Override protected Class<AlarmEntity> getColumnFamilyClass() { return AlarmEntity.class; } @Override protected String getColumnFamilyName() { return ALARM_COLUMN_FAMILY_NAME; } protected boolean isDeleteOnSave() { return false; } @Override public AlarmEntity save(Alarm alarm) { log.debug("Save asset [{}] ", alarm); return save(new AlarmEntity(alarm)); } @Override public ListenableFuture<Alarm> findLatestByOriginatorAndType(TenantId tenantId, EntityId originator, String type) { Select select = select().from(ALARM_COLUMN_FAMILY_NAME); Select.Where query = select.where(); query.and(eq(ALARM_TENANT_ID_PROPERTY, tenantId.getId())); query.and(eq(ALARM_ORIGINATOR_ID_PROPERTY, originator.getId())); query.and(eq(ALARM_ORIGINATOR_TYPE_PROPERTY, originator.getEntityType())); query.and(eq(ALARM_TYPE_PROPERTY, type)); query.limit(1); query.orderBy(QueryBuilder.asc(ModelConstants.ALARM_TYPE_PROPERTY), QueryBuilder.desc(ModelConstants.ID_PROPERTY)); return Futures.transform(findOneByStatementAsync(query), toDataFunction()); } @Override public ListenableFuture<Alarm> findAlarmByIdAsync(UUID key) { log.debug("Get alarm by id {}", key); Select.Where query = select().from(ALARM_BY_ID_VIEW_NAME).where(eq(ModelConstants.ID_PROPERTY, key)); query.limit(1); log.trace("Execute query {}", query); return Futures.transform(findOneByStatementAsync(query), toDataFunction()); } @Override public ListenableFuture<List<AlarmInfo>> findAlarms(AlarmQuery query) { log.trace("Try to find alarms by entity [{}], searchStatus [{}], status [{}] and pageLink [{}]", query.getAffectedEntityId(), query.getSearchStatus(), query.getStatus(), query.getPageLink()); EntityId affectedEntity = query.getAffectedEntityId(); String searchStatusName; if (query.getSearchStatus() == null && query.getStatus() == null) { searchStatusName = AlarmSearchStatus.ANY.name(); } else if (query.getSearchStatus() != null) { searchStatusName = query.getSearchStatus().name(); } else { searchStatusName = query.getStatus().name(); } String relationType = BaseAlarmService.ALARM_RELATION_PREFIX + searchStatusName; ListenableFuture<List<EntityRelation>> relations = relationDao.findRelations(affectedEntity, relationType, RelationTypeGroup.ALARM, EntityType.ALARM, query.getPageLink()); return Futures.transform(relations, (AsyncFunction<List<EntityRelation>, List<AlarmInfo>>) input -> { List<ListenableFuture<AlarmInfo>> alarmFutures = new ArrayList<>(input.size()); for (EntityRelation relation : input) { alarmFutures.add(Futures.transform(findAlarmByIdAsync(relation.getTo().getId()), (Function<Alarm, AlarmInfo>) alarm1 -> new AlarmInfo(alarm1))); } return Futures.successfulAsList(alarmFutures); }); } }