/**
* 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.extensions.core.processor;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.runtime.parser.ParseException;
import org.thingsboard.server.common.data.DataConstants;
import org.thingsboard.server.common.data.Event;
import org.thingsboard.server.common.msg.device.ToDeviceActorMsg;
import org.thingsboard.server.extensions.api.component.Processor;
import org.thingsboard.server.extensions.api.rules.*;
import org.thingsboard.server.extensions.core.utils.VelocityUtils;
import java.util.Optional;
/**
* @author Andrew Shvayka
*/
@Processor(name = "Alarm Deduplication Processor", descriptor = "AlarmDeduplicationProcessorDescriptor.json",
configuration = AlarmDeduplicationProcessorConfiguration.class)
@Slf4j
public class AlarmDeduplicationProcessor extends SimpleRuleLifecycleComponent
implements RuleProcessor<AlarmDeduplicationProcessorConfiguration> {
public static final String IS_NEW_ALARM = "isNewAlarm";
private ObjectMapper mapper = new ObjectMapper();
private AlarmDeduplicationProcessorConfiguration configuration;
private Template alarmIdTemplate;
private Template alarmBodyTemplate;
@Override
public void init(AlarmDeduplicationProcessorConfiguration configuration) {
this.configuration = configuration;
try {
this.alarmIdTemplate = VelocityUtils.create(configuration.getAlarmIdTemplate(), "Alarm Id Template");
this.alarmBodyTemplate = VelocityUtils.create(configuration.getAlarmBodyTemplate(), "Alarm Body Template");
} catch (ParseException e) {
log.error("Failed to create templates based on provided configuration!", e);
throw new RuntimeException("Failed to create templates based on provided configuration!", e);
}
}
@Override
public RuleProcessingMetaData process(RuleContext ctx, ToDeviceActorMsg msg) throws RuleException {
RuleProcessingMetaData md = new RuleProcessingMetaData();
VelocityContext context = VelocityUtils.createContext(ctx.getDeviceAttributes(), msg.getPayload());
String alarmId = VelocityUtils.merge(alarmIdTemplate, context);
String alarmBody = VelocityUtils.merge(alarmBodyTemplate, context);
Optional<Event> existingEvent = ctx.findEvent(DataConstants.ALARM, alarmId);
if (!existingEvent.isPresent()) {
Event event = new Event();
event.setType(DataConstants.ALARM);
event.setUid(alarmId);
event.setBody(mapper.createObjectNode().put("body", alarmBody));
Optional<Event> savedEvent = ctx.saveIfNotExists(event);
if (savedEvent.isPresent()) {
log.info("New Alarm detected: '{}'", alarmId);
md.put(IS_NEW_ALARM, Boolean.TRUE);
md.put("alarmId", alarmId);
md.put("alarmBody", alarmBody);
for (Object key : context.getKeys()) {
md.put(key.toString(), context.get(key.toString()));
}
}
}
return md;
}
}