EndpointNotificationCassandraDao.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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.kaaproject.kaa.server.common.nosql.cassandra.dao;

import static com.datastax.driver.core.querybuilder.QueryBuilder.delete;
import static com.datastax.driver.core.querybuilder.QueryBuilder.eq;
import static com.datastax.driver.core.querybuilder.QueryBuilder.select;
import static org.kaaproject.kaa.server.common.nosql.cassandra.dao.CassandraDaoUtil.getByteBuffer;
import static org.kaaproject.kaa.server.common.nosql.cassandra.dao.model.CassandraModelConstants.ET_NF_COLUMN_FAMILY_NAME;
import static org.kaaproject.kaa.server.common.nosql.cassandra.dao.model.CassandraModelConstants.ET_NF_ENDPOINT_KEY_HASH_PROPERTY;
import static org.kaaproject.kaa.server.common.nosql.cassandra.dao.model.CassandraModelConstants.ET_NF_LAST_MOD_TIME_PROPERTY;

import com.datastax.driver.core.Statement;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.querybuilder.Select;

import org.kaaproject.kaa.common.dto.EndpointNotificationDto;
import org.kaaproject.kaa.server.common.dao.impl.EndpointNotificationDao;
import org.kaaproject.kaa.server.common.nosql.cassandra.dao.filter.CassandraEpByAppIdDao;
import org.kaaproject.kaa.server.common.nosql.cassandra.dao.model.CassandraEndpointNotification;
import org.kaaproject.kaa.server.common.utils.Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import java.util.Collections;
import java.util.List;

@Repository(value = "unicastNotificationDao")
public class EndpointNotificationCassandraDao
    extends AbstractCassandraDao<CassandraEndpointNotification, String>
    implements EndpointNotificationDao<CassandraEndpointNotification> {

  private static final Logger LOG =
      LoggerFactory.getLogger(EndpointNotificationCassandraDao.class);

  @Autowired
  private CassandraEpByAppIdDao cassandraEpByAppIdDao;

  @Override
  protected Class<CassandraEndpointNotification> getColumnFamilyClass() {
    return CassandraEndpointNotification.class;
  }

  @Override
  protected String getColumnFamilyName() {
    return ET_NF_COLUMN_FAMILY_NAME;
  }

  @Override
  public List<CassandraEndpointNotification> findNotificationsByKeyHash(byte[] keyHash) {
    LOG.debug("Try to find endpoint notifications by endpoint key hash {}", Utils.encodeHexString(keyHash));
    List<CassandraEndpointNotification> cassandraEndpointNotifications =
        Collections.emptyList();
    if (keyHash != null) {
      Select.Where where = select().from(getColumnFamilyName())
          .where(eq(ET_NF_ENDPOINT_KEY_HASH_PROPERTY, getByteBuffer(keyHash)));
      LOG.debug("Execute query {}:", where);
      cassandraEndpointNotifications = findListByStatement(where);
    }
    return cassandraEndpointNotifications;
  }

  @Override
  public void removeNotificationsByKeyHash(byte[] keyHash) {
    LOG.debug("Remove endpoint notifications by endpoint key hash {}", Utils.encodeHexString(keyHash));
    execute(delete().from(getColumnFamilyName())
        .where(eq(ET_NF_ENDPOINT_KEY_HASH_PROPERTY, getByteBuffer(keyHash))));
  }

  @Override
  public void removeNotificationsByAppId(String appId) {
    LOG.debug("Remove endpoint notifications by app id {}", appId);
    Statement deleteEpNfs = delete().from(getColumnFamilyName())
        .where(
            QueryBuilder.in(
                ET_NF_ENDPOINT_KEY_HASH_PROPERTY,
                cassandraEpByAppIdDao.getEpIdsListByAppId(appId)));
    LOG.trace("Execute query {}", deleteEpNfs);
    execute(deleteEpNfs);
  }

  @Override
  public CassandraEndpointNotification save(EndpointNotificationDto dto) {
    CassandraEndpointNotification endpointNotification =
        new CassandraEndpointNotification(dto);
    LOG.debug("Save endpoint notification for endpoint profile {}",
        Utils.encodeHexString(endpointNotification.getEndpointKeyHash()));
    save(new CassandraEndpointNotification(dto));
    LOG.trace("Saved endpoint notification {}", endpointNotification);
    return endpointNotification;
  }

  @Override
  public CassandraEndpointNotification findById(String id) {
    LOG.debug("Try to find endpoint notifications by id {}", id);
    CassandraEndpointNotification key = new CassandraEndpointNotification(id);
    Select.Where where = select().from(getColumnFamilyName())
        .where(eq(ET_NF_ENDPOINT_KEY_HASH_PROPERTY, key.getEndpointKeyHash()))
        .and(eq(ET_NF_LAST_MOD_TIME_PROPERTY, key.getLastModifyTime()));
    LOG.debug("[{}] Execute query {}:", id, where);
    CassandraEndpointNotification endpointNotification = findOneByStatement(where);
    LOG.trace("Found endpoint notification {} by id {}:", endpointNotification, id);
    return endpointNotification;
  }

  @Override
  public void removeById(String id) {
    LOG.debug("Remove endpoint notifications by id {}", id);
    CassandraEndpointNotification key = new CassandraEndpointNotification(id);
    Statement delete = delete().from(getColumnFamilyName())
        .where(eq(ET_NF_ENDPOINT_KEY_HASH_PROPERTY, key.getEndpointKeyHash()))
        .and(eq(ET_NF_LAST_MOD_TIME_PROPERTY, key.getLastModifyTime()));
    execute(delete);
    LOG.debug("[{}] Execute query {}:", id, delete);
  }

}