Sending the schedule for a fixed-route, scheduled mobility service provider (example: Metro and Buses) (Java)
In this use case, the user views the schedule or time-table for a fixed route mobility service provider like a bus service, or a metro service
Code snippets
BPP receives protocol search
/*
Example Request JSON:
{
"context": {
"domain": "nic2004:60221",
"country": "IND",
"city": "std:080",
"action": "search",
"core_version": "0.9.1",
"bap_id": "https://mock_bap.com/",
"bap_uri": "https://mock_bap.com/beckn/",
"transaction_id": "1209849124",
"message_id": "12341242342",
"timestamp": "2021-03-23T10:00:40.065Z"
},
"message": {
"intent" : {
"fulfillment": {
"start" : {
"location" : {
"gps" : "10.109289, 76.349601"
}
},
"end" : {
"location" : {
"gps" : "10.087307, 76.342809"
}
}
}
}
}
}
*/
// BPP Search endpoint
@PostMapping("/bpp/search")
public ResponseEntity search(
@RequestHeader HttpHeaders headers,
@RequestBody SearchRequest request) {
var response = bppApplicationService.search(request, headers);
return ResponseEntity.ok(response);
}
BPP processes the search
public Response search(SearchRequest request, HttpHeaders headers) {
var searchResponse = new OnSearchRequest();
// Validate the headers
var isHeadersValid = validateHeaders(headers);
// Construct and return error
if (!isHeadersValid) return null;
// Fetch the data based on the request
var requestIntent = request.getMessage().getIntent();
// Execute business logic here
// Generate the response
searchResponse = generateSearchResponse(searchResult);
//invoke on_search api
return invokeOnSearch(searchResponse, headers);
}
}
BPP generates response
/*
Example Response JSON:
{
"context": {
"domain": "nic2004:60221",
"country": "IND",
"city": "std:080",
"action": "on_search",
"core_version": "0.9.1",
"bap_id": "https://mock_bap.com/",
"bap_uri": "https://mock_bap.com/beckn/",
"bpp_id": "https://mock_bpp.com/",
"bpp_uri": "https://mock_bpp.com/beckn/",
"transaction_id": "1209849124",
"message_id": "12341242343",
"timestamp": "2021-03-23T10:00:40.065Z"
},
"message": {
"catalog": {
"bpp/descriptor": {
"name": "Metro Corp"
},
"bpp/providers": [
{
"id": "metro",
"descriptor" : {
"name": "Metro"
},
"locations": [
{
"id": "stop-1",
"station_code":"Aluva",
"gps": "10.109289, 76.349601",
"time":{
"schedule":{
"times":[
"2021-08-19T01:30:00.000Z",
"2021-08-19T01:50:00.000Z",
"2021-08-19T02:10:00.000Z",
"2021-08-19T02:30:00.000Z",
"2021-08-19T02:50:00.000Z",
"2021-08-19T03:10:00.000Z",
"2021-08-19T03:30:00.000Z",
"2021-08-19T03:50:00.000Z",
"2021-08-19T04:10:00.000Z",
"2021-08-19T04:30:00.000Z",
"2021-08-19T04:50:00.000Z"
]
}
}
},
{
"id": "stop-2",
"station_code":"Pulinchodu",
"gps": "10.095094, 76.346629",
"time":{
"schedule":{
"times":[
"2021-08-19T01:34:00.000Z",
"2021-08-19T01:54:00.000Z",
"2021-08-19T02:14:00.000Z",
"2021-08-19T02:34:00.000Z",
"2021-08-19T02:54:00.000Z",
"2021-08-19T03:14:00.000Z",
"2021-08-19T03:34:00.000Z",
"2021-08-19T03:54:00.000Z",
"2021-08-19T04:14:00.000Z",
"2021-08-19T04:34:00.000Z",
"2021-08-19T04:54:00.000Z"
]
}
}
},
{
"id": "stop-3",
"station_code":"Companypady",
"gps": "10.087307, 76.342809",
"time":{
"schedule":{
"times":[
"2021-08-19T01:38:00.000Z",
"2021-08-19T01:58:00.000Z",
"2021-08-19T02:18:00.000Z",
"2021-08-19T02:38:00.000Z",
"2021-08-19T02:58:00.000Z",
"2021-08-19T03:18:00.000Z",
"2021-08-19T03:38:00.000Z",
"2021-08-19T03:58:00.000Z",
"2021-08-19T04:18:00.000Z",
"2021-08-19T04:38:00.000Z",
"2021-08-19T04:58:00.000Z"
]
}
}
}
],
"items": [
{
"id": "1-2",
"descriptor" : {
"name" : "Aluva to Pulinchodu"
},
"price" : {
"currency": "INR",
"value": "10"
},
"matched": true
},
{
"id": "1-3",
"descriptor" : {
"name" : "Aluva to Companypady"
},
"price" : {
"currency": "INR",
"value": "20"
},
"matched": true
}
]
}
]
}
}
}
*/
public OnSearchRequest generateSearchResponse(List searchResult) {
var searchResult = SearchResponseBuilder.builder.result(searchResult).build();
// Convert response into protocol object similar to example above
return searchResult;
}
BPP calls protocol on_search
public Response invokeOnSearch(OnSearchRequest searchResponse, HttpHeaders headers) {
if(searchResponse.getError() == null) {
// Call BAP on_search api with the search response
// Call to look up function which returns the the public key and BAP/BG Endpoint to be called
var url = lookUp(headers);
var response = apiClient.post(url[0] + Context.ActionEnum.on_search,
constructResponseHeaders(),
searchResponse,
OnSearchRequest.class);
return Response.of("ACK", null);
} else {
return Response.of("NACK", null);
}
}