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src/main/java/telraam/logic/lapper/slapper/Slapper.java
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| package telraam.logic.lapper.slapper; | ||
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| import io.dropwizard.jersey.setup.JerseyEnvironment; | ||
| import org.jdbi.v3.core.Jdbi; | ||
| import telraam.database.daos.LapSourceDAO; | ||
| import telraam.database.models.Detection; | ||
| import telraam.database.models.LapSource; | ||
| import telraam.logic.lapper.Lapper; | ||
|
|
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| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.logging.Logger; | ||
|
|
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| // Lapper that only uses a single sql query | ||
| public class Slapper implements Lapper { | ||
| private final String SOURCE_NAME = "slapper"; | ||
| private final int DEBOUNCE_TIMEOUT = 10; | ||
| private final ScheduledExecutorService scheduler; | ||
| private boolean debounceScheduled; | ||
| private final Logger logger; | ||
| private final Jdbi jdbi; | ||
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| public Slapper(Jdbi jdbi) { | ||
| this.jdbi = jdbi; | ||
| this.scheduler = Executors.newScheduledThreadPool(1); | ||
| this.logger = Logger.getLogger(Slapper.class.getName()); | ||
| this.debounceScheduled = false; | ||
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| // Get the lapSourceId, create the source if needed | ||
| LapSourceDAO lapSourceDAO = jdbi.onDemand(LapSourceDAO.class); | ||
| if (lapSourceDAO.getByName(SOURCE_NAME).isEmpty()) { | ||
| lapSourceDAO.insert(new LapSource(SOURCE_NAME)); | ||
| } | ||
| } | ||
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||
| @Override | ||
| public void handle(Detection msg) { | ||
| if (!this.debounceScheduled) { | ||
| this.debounceScheduled = true; | ||
| this.scheduler.schedule(() -> { | ||
| try { | ||
| this.calculateLaps(); | ||
| } catch (Exception e) { | ||
| logger.severe(e.getMessage()); | ||
| } | ||
| this.debounceScheduled = false; | ||
| }, DEBOUNCE_TIMEOUT, TimeUnit.SECONDS); | ||
| } | ||
| } | ||
|
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| private void calculateLaps() { | ||
| logger.info("Slapper: Calculating laps..."); | ||
| this.jdbi.useHandle(handle -> handle.execute( | ||
| """ | ||
| WITH switchovers AS ( | ||
| SELECT teamid AS team_id, | ||
| newbatonid, | ||
| timestamp AS start_timestamp, | ||
| COALESCE( | ||
| LEAD(timestamp) OVER (PARTITION BY teamid ORDER BY timestamp), | ||
| timestamp + INTERVAL '6 MONTHS' | ||
| ) AS next_baton_switch | ||
| FROM batonswitchover | ||
| ), | ||
| team_detections AS ( | ||
| SELECT MIN(station_id) AS station_id, | ||
| MAX(rssi) as rssi, | ||
| date_trunc('second', timestamp) AS timestamp_seconds, | ||
| team_id | ||
| FROM detection d | ||
| LEFT JOIN switchovers s ON d.baton_id = s.newbatonid | ||
| AND d.timestamp BETWEEN s.start_timestamp AND s.next_baton_switch | ||
| WHERE station_id NOT BETWEEN 3 AND 5 | ||
| AND rssi > -85 | ||
| AND team_id IS NOT NULL | ||
| GROUP BY date_trunc('second', timestamp), team_id | ||
| ), | ||
| no_duplicates AS ( | ||
| SELECT team_id, | ||
| timestamp_seconds, | ||
| FIRST_VALUE(timestamp_seconds) OVER ( | ||
| PARTITION BY team_id | ||
| ORDER BY timestamp_seconds | ||
| ) AS first_timestamp_seconds | ||
| FROM ( | ||
| SELECT *, | ||
| LAG(station_id) OVER ( | ||
| PARTITION BY team_id | ||
| ORDER BY timestamp_seconds | ||
| ) AS prev_station_id | ||
| FROM team_detections | ||
| ) AS previous | ||
| WHERE station_id - prev_station_id <= -5 | ||
| ), | ||
| new_laps AS ( | ||
| SELECT team_id, | ||
| timestamp_seconds | ||
| FROM no_duplicates n_d | ||
| WHERE timestamp_seconds > first_timestamp_seconds | ||
| ), | ||
| cst_source_id AS ( | ||
| SELECT COALESCE(id, -1) AS source_id | ||
| FROM lap_source | ||
| WHERE name ILIKE 'slapper' | ||
| ), | ||
| deletions AS ( | ||
| DELETE FROM lap l | ||
| WHERE lap_source_id = (SELECT source_id FROM cst_source_id) | ||
| AND NOT EXISTS ( | ||
| SELECT 1 | ||
| FROM new_laps n_l | ||
| WHERE l.team_id = n_l.team_id | ||
| AND l.timestamp = n_l.timestamp_seconds | ||
| ) | ||
| ) | ||
| INSERT INTO lap (team_id, timestamp, lap_source_id) | ||
| SELECT team_id, | ||
| timestamp_seconds, | ||
| source_id | ||
| FROM new_laps n_l, cst_source_id | ||
| WHERE NOT EXISTS ( | ||
| SELECT 1 | ||
| FROM lap l, cst_source_id | ||
| WHERE l.lap_source_id = source_id | ||
| AND l.team_id = n_l.team_id | ||
| AND l.timestamp = n_l.timestamp_seconds | ||
| ) | ||
| """ | ||
| ) | ||
| ); | ||
| logger.info("Slapper: Done calculating laps"); | ||
| } | ||
|
|
||
| @Override | ||
| public void registerAPI(JerseyEnvironment jersey) { | ||
|
|
||
| } | ||
| } |