request response35–50 min2 stages8 code languages

Contract slice: Navigation built for intermittent connectivity

Reliable guidance across coverage gaps without giving up traffic, search freshness, or safety.

The real-world moment

A vehicle crosses a long connectivity gap after receiving a regional data update the night before. Navigation must boot with a compatible signed offline package, plan and guide locally, blend online traffic/search when available, protect driver attention, and recover automatically if the new package or runtime is unhealthy.

Make ownership visible before code.

Prove one bounded contract, identity handoff, failure response, and observable first success.

Application state
stateless
Planning calls
0
Credentials accepted
No
Write authority
None
01
Vehicle/OEM identity

Activate the head unit

Owns hardware, market/region, entitlement, runtime compatibility, privacy/consent, activation and update campaign.

Vehicle manifest ↔ hardware/runtime/region/entitlement versions

GETGets the live data of devices./deviceThis is a supporting operation from the selected product stack, not proof of an exact provider contract for this stage. Resolve the stage through its product source or adapter boundary before live implementation.

Record stage 1 with the application identity, source fingerprint, request or aggregate identity, timestamp, and observable outcome.

Power loss during update

Write only the inactive slot and switch one atomic pointer after verification; boot always finds a previously acknowledged package.

02
Dual-slot offline runtime

Install compatible signed regional data

Maintains one active and one staged signed package, atomic activation pointer, health acknowledgement and rollback evidence.

Data package ↔ epoch, region, size, content/signature hash, compatibility

GETGeocode API/api/places/geocodeThis is a supporting operation from the selected product stack, not proof of an exact provider contract for this stage. Resolve the stage through its product source or adapter boundary before live implementation.

Record stage 2 with the application identity, source fingerprint, request or aggregate identity, timestamp, and observable outcome.

Online traffic disappears mid-route

Keep guiding from the last valid local route, mark traffic freshness and avoid blocking safety-critical guidance.

Edit once. Generate eight trusted-runtime implementations.

The recipe starts from the normalized GET /{REST_KEY}/{resources}/{profile}/{geopositions} contract. Execute six deterministic fixture outcomes before an issued account is involved.

Local request composerCode stays local · fixtures are explicit
GETRequest inputs
12 editable · 1 protected
Generated in eight languages
Environment-backed credentials
GEThttps://apis.mapmyindia.com/advancedmaps/v1/${MAPPLS_REST_KEY}/route_eta/driving/28.612964%2C77.229463?geometries=polyline&rtype=0&steps=true&exclude=ferry&region=IND&bearings=180&alternatives=2&radiuses=100%3B100&overview=simplified
Credential-free sandboxExecute this contract without a provider call
How fixtures work
Generated from your inputs
curl --request GET \
  --url "https://apis.mapmyindia.com/advancedmaps/v1/${MAPPLS_REST_KEY}/route_eta/driving/28.612964%2C77.229463?geometries=polyline&rtype=0&steps=true&exclude=ferry&region=IND&bearings=180&alternatives=2&radiuses=100%3B100&overview=simplified" \
  --header "Accept: application/json"

Credential-safe by constructionSet MAPPLS_REST_KEY only in your trusted runtime. Code generation stays local. Sandbox execution sends only bounded fixture inputs to this developer platform and never reads a credential or calls Mappls.

Break the journey before customers do.

These controls are required at this operating depth; deeper recipes add durable truth rather than merely more API calls.

Bound inputs and outputsAbortable timeoutRetry only safe readsTyped empty and denied statesSafe request correlationCredential and URL-log redaction

Definition of done

Valid, empty, invalid-input, authentication-denied, rate-limited, timed-out, and unavailable outcomes are distinguishable.

The accepted Mappls or provider identity is retained separately from display text and coordinates.

Credentials remain in the approved runtime and logs retain only safe request evidence.

The exact source contract, auth generation, host, entitlement, quota, and region are reviewed before live traffic.

Contracts, tutorials, and journeys stay linked.

Care Transfer Desk

Confirm the correct receiving entrance, assign eligible transport, preserve courier custody, review condition exceptions, and reconcile receiver acceptance without retaining patient or clinical data.

Source-grounded, not authority-granting

This recipe composes source-derived contracts, application architecture, fixtures, and maintained learning evidence. It does not prove package availability, provider payload shape, account entitlement, regional behavior, production compatibility, or release approval.