/*
* #!
* %
* Copyright (C) 2014 - 2016 Humboldt-Universität zu Berlin
* %
* 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 de.hub.cs.dbis.lrb.queries;
import java.io.IOException;
import joptsimple.ArgumentAcceptingOptionSpec;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import backtype.storm.generated.AlreadyAliveException;
import backtype.storm.generated.InvalidTopologyException;
import de.hub.cs.dbis.aeolus.monitoring.MonitoringTopoloyBuilder;
import de.hub.cs.dbis.aeolus.sinks.FileFlushSinkBolt;
import de.hub.cs.dbis.aeolus.utils.TimestampMerger;
import de.hub.cs.dbis.lrb.operators.CountVehiclesBolt;
import de.hub.cs.dbis.lrb.queries.utils.TopologyControl;
import de.hub.cs.dbis.lrb.types.PositionReport;
import de.hub.cs.dbis.lrb.types.util.SegmentIdentifier;
/**
* {@link CountVehicleSubquery} assembles the "car count" subquery that computes number of cars per minute within each
* segment (ie, x-way, segment, and direction). The car count must be a "count distinct", ie, if a car issue multiple
* {@link PositionReport}s within a single segment, the car is only counted once.
*
* * @author mjsax
*/
public class CountVehicleSubquery extends AbstractQuery {
private OptionSpec<String> output;
public CountVehicleSubquery() {
this(true);
}
public CountVehicleSubquery(boolean required) {
this.output = parser.accepts("cnt-output", "Bolt local path to write car counts.").withRequiredArg()
.describedAs("file").ofType(String.class);
if(required) {
this.output = ((ArgumentAcceptingOptionSpec<String>)this.output).required();
}
}
@Override
protected void addBolts(MonitoringTopoloyBuilder builder, OptionSet options) {
builder
.setBolt(TopologyControl.COUNT_VEHICLES_BOLT_NAME,
new TimestampMerger(new CountVehiclesBolt(), PositionReport.TIME_IDX),
OperatorParallelism.get(TopologyControl.COUNT_VEHICLES_BOLT_NAME))
.fieldsGrouping(TopologyControl.SPLIT_STREAM_BOLT_NAME, TopologyControl.POSITION_REPORTS_STREAM_ID,
SegmentIdentifier.getSchema())
.allGrouping(TopologyControl.SPLIT_STREAM_BOLT_NAME, TimestampMerger.FLUSH_STREAM_ID);
if(options.has(this.output)) {
builder.setSink("cnt-sink", new FileFlushSinkBolt(options.valueOf(this.output))).localOrShuffleGrouping(
TopologyControl.COUNT_VEHICLES_BOLT_NAME, TopologyControl.CAR_COUNTS_STREAM_ID);
}
}
public static void main(String[] args) throws IOException, InvalidTopologyException, AlreadyAliveException {
System.exit(new CountVehicleSubquery().parseArgumentsAndRun(args));
}
}