`NotificationHubClient`

com.notificationhub.sdk.NotificationHubClient

The root client. Construct it once via NotificationHubClient.Builder and share the instance across your application — it owns a shared HttpClient and ObjectMapper used by every sub-client.

`NotificationHubClient.Builder`

Method	Description
`apiKey(String apiKey)`	Sets the API key. Required.
`apiSecret(String apiSecret)`	Sets the API secret used for HMAC signing. Required.
`baseUrl(String baseUrl)`	Overrides the default endpoint. Throws `IllegalArgumentException` if the URL is `http://` and not `localhost`. Trailing slash is stripped.
`build()`	Returns a `NotificationHubClient`. Throws `IllegalArgumentException` if `apiKey` or `apiSecret` is null/blank.

NotificationHubClient client = new NotificationHubClient.Builder()
        .apiKey("your-api-key")
        .apiSecret("your-api-secret")
        .baseUrl("your-base-url") // optional   
        .build();

Default base URL: (production endpoint) — the SDK uses NotificationHub's production endpoint by default. You only need to set baseUrl(...) if you want to point at a different environment.

Sub-client accessors

Method	Returns
`notifications()`	`NotificationApiClient`
`templates()`	`TemplateApiClient`
`analytics()`	`AnalyticsApiClient`
`projects()`	`ProjectApiClient`
`providers()`	`ProviderApiClient`

Each call returns the same instance for the lifetime of the client — sub-clients are created once, in the constructor.

Throws

Exception	When
`IllegalArgumentException`	`apiKey`/`apiSecret` missing at `build()`, or a non-HTTPS non-localhost `baseUrl` is set.