org.ka2ddo.yaac.gps

Interface GpsLogger

All Superinterfaces:

ShutdownHandler

All Known Implementing Classes:

GpsCsvLogger, GpsdJsonLogger, GpxLogger, NativeGpsLogger, NmeaLogger

public interface GpsLogger
extends ShutdownHandler

This interface specifies how the GPSDistributor will record GPS position events to disk files. Different interface implementors can choose different file formats as they choose. All loggers should behave similarly to the FileLogger in that they should not write continuously to disk, but should use a buffer with a flush either when the buffer is full or a designated time interval is up, so as to minimize disk fragmentation and wear on Raspberry Pi SD cards. They should also register a ShutdownHandler so YAAC termination will cause the file to be closed correctly with any trailing suffix contents (XML close tags, etc.).

Author:

Andrew Pavlin, KA2DDO

Method Summary

Modifier and Type	Method and Description
void	close() Stop using this format of logger.
void	logJSON(java.util.Map<java.lang.String,java.lang.Object> jsonMsg, GpsFix fix, SatelliteCatalog satelliteCatalog, java.lang.String source) Log this GPS JSON event that was received from GPSD.
void	logNMEA(java.lang.String nmeaSentence, GpsFix fix, SatelliteCatalog satelliteCatalog, java.lang.String source) Log this GPS event that was reported as an ASCII NMEA sentence.
void	open() Set up for logging using a new format.

Methods inherited from interface org.ka2ddo.yaac.core.ShutdownHandler

shutdown

Method Detail

open

void open()

Set up for logging using a new format. Note this will not be called for day rollover or similar log segmenting events. That is up to the logger class itself to implement.

logNMEA

void logNMEA(java.lang.String nmeaSentence,
             GpsFix fix,
             SatelliteCatalog satelliteCatalog,
             java.lang.String source)

Log this GPS event that was reported as an ASCII NMEA sentence. Note that there is a YAAC-proprietary NMEA message used to mark an event point in the file, sentence $PYAACMRK, that must also be handled.

Parameters:

nmeaSentence - String of the NMEA sentence to log

fix - the GpsFix object that has been updated (if necessary) by the NMEA sentence, or null if not changed

satelliteCatalog - the SatelliteCatalog that has been updated (if necessary) by the sentence, or null if not changed

source - String name of remote GPS, or null if it is GPS data for the local station

logJSON

void logJSON(java.util.Map<java.lang.String,java.lang.Object> jsonMsg,
             GpsFix fix,
             SatelliteCatalog satelliteCatalog,
             java.lang.String source)

Log this GPS JSON event that was received from GPSD.

Parameters:

jsonMsg - Map<String, Object> of the JSON structure, as returned by Json

fix - the GpsFix object that has been updated (if necessary) by the JSON structure, or null if not changed

satelliteCatalog - the SatelliteCatalog that has been updated (if necessary) by the JSON structure

source - String name of remote GPS, or null if it is GPS data for the local station

close

void close()

Stop using this format of logger. Any buffered output will be flushed and the current log file will be closed.