help doubt, GTFS Realtime Protobuf
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Rui M
Feb 6, 2020, 11:55:31 AM2/6/20
to GTFS-realtime
Following this how can I create a delay for the whole route, not just one trip.
***
syntax = "proto3";
package transit_realtime;
option java_package = "com.google.transit.realtime";
message FeedMessage {
// Metadata about this feed and feed message.
required FeedHeader header = 1;
// Contents of the feed.
repeated FeedEntity entity = 2;
}
message FeedHeader {
required string gtfs_realtime_version = 1;
enum Incrementality {
FULL_DATASET = 0;
DIFFERENTIAL = 1;
}
optional Incrementality incrementality = 2 [default = FULL_DATASET];
optional uint64 timestamp = 3;
}
message FeedEntity {
required string id = 1;
optional bool is_deleted = 2 [default = false];
optional TripUpdate trip_update = 3;
}
message TripUpdate {
required TripDescriptor trip = 1;
message StopTimeEvent {
optional int32 delay = 1200;
optional int32 uncertainty = 0;
}
repeated StopTimeUpdate stop_time_update = 2;
optional uint64 timestamp = 4;
optional int32 delay = 1200;
}
message TimeRange {
optional uint64 start = 1;
optional uint64 end = 2;
}
message TripDescriptor {
optional string route_id = 9403;
optional string start_time = 2;
optional string start_date = 3;
enum ScheduleRelationship {
SCHEDULED = 0;
ADDED = 1;
UNSCHEDULED = 2;
CANCELED = 3;
}
optional ScheduleRelationship schedule_relationship = 0;
}
message EntitySelector {
optional string agency_id = 1;
optional string route_id = 9403;
}
package transit_realtime;
option java_package = "com.google.transit.realtime";
message FeedMessage {
// Metadata about this feed and feed message.
required FeedHeader header = 1;
// Contents of the feed.
repeated FeedEntity entity = 2;
}
message FeedHeader {
required string gtfs_realtime_version = 1;
enum Incrementality {
FULL_DATASET = 0;
DIFFERENTIAL = 1;
}
optional Incrementality incrementality = 2 [default = FULL_DATASET];
optional uint64 timestamp = 3;
}
message FeedEntity {
required string id = 1;
optional bool is_deleted = 2 [default = false];
optional TripUpdate trip_update = 3;
}
message TripUpdate {
required TripDescriptor trip = 1;
message StopTimeEvent {
optional int32 delay = 1200;
optional int32 uncertainty = 0;
}
repeated StopTimeUpdate stop_time_update = 2;
optional uint64 timestamp = 4;
optional int32 delay = 1200;
}
message TimeRange {
optional uint64 start = 1;
optional uint64 end = 2;
}
message TripDescriptor {
optional string route_id = 9403;
optional string start_time = 2;
optional string start_date = 3;
enum ScheduleRelationship {
SCHEDULED = 0;
ADDED = 1;
UNSCHEDULED = 2;
CANCELED = 3;
}
optional ScheduleRelationship schedule_relationship = 0;
}
message EntitySelector {
optional string agency_id = 1;
optional string route_id = 9403;
}
***
Am I doing it correctly?
Sean Barbeau
Oct 9, 2020, 12:13:29 PM10/9/20
to GTFS-realtime
Rui,
First, you'll need to compile the gtfs-realtime.proto file into a library that can help you produce data in the binary protocol buffer format (the .proto file itself isn't the data that is exchanged between a producer and consumer). More here on this process:
Alternately, you can use the existing gtfs-realtime-bindings library, which has already done this step for you for several programming languages:
When you've done this, you'll need to write code to instantiate a TripUpdate with the TripDescriptor.route_id set to your route, and the TripUpdate.delay set to your delay value. Note that some consumers may not support this format - typically delays are created at the trip and stop level.
There are a number of GTFS-realtime demo apps here that might help you get started:
Sean
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