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PubNub is a cross-platform client-to-client (1:1 and 1:many) push service in the cloud, capable of broadcasting real-time messages to millions of web and mobile clients simultaneously, in less than a quarter second!
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package com.pubnub.api.v2.entities
import com.pubnub.api.endpoints.files.DeleteFile
import com.pubnub.api.endpoints.files.SendFile
import com.pubnub.api.endpoints.pubsub.Publish
import com.pubnub.api.endpoints.pubsub.Signal
import com.pubnub.api.v2.subscriptions.Subscription
import com.pubnub.api.v2.subscriptions.SubscriptionOptions
import com.pubnub.kmp.Uploadable
/**
* A representation of a PubNub channel identified by its [name].
*
* You can get a [Subscription] to this channel through [Subscribable.subscription].
*
* Use the [com.pubnub.api.PubNub.channel] factory method to create instances of this interface.
*/
interface Channel : Subscribable {
/**
* The name of this channel. Supports wildcards by ending it with ".*"
*
* See more in the [documentation](https://www.pubnub.com/docs/general/channels/overview)
*/
val name: String
/**
* Returns a [Subscription] that can be used to subscribe to this channel.
*
* Channel subscriptions support passing [com.pubnub.api.v2.subscriptions.SubscriptionOptions.receivePresenceEvents] in
* [options] to enable receiving presence events.
*
* [com.pubnub.api.v2.subscriptions.SubscriptionOptions.filter] can be used to filter events delivered to the subscription.
*
* For example, to create a subscription that only listens to presence events:
* ```
* channel.subscription(SubscriptionOptions.receivePresenceEvents() + SubscriptionOptions.filter { it is PNPresenceEventResult } )
* ```
*
* @param options optional [SubscriptionOptions].
* @return an inactive [Subscription] to this channel. You must call [Subscription.subscribe] to start receiving events.
*/
override fun subscription(options: SubscriptionOptions): Subscription
/**
* Send a message to all subscribers of the channel.
*
* To publish a message you must first specify a valid [PNConfiguration.publishKey].
* A successfully published message is replicated across the PubNub Real-Time Network and sent
* simultaneously to all subscribed clients on the channel.
*
* Messages in transit can be secured from potential eavesdroppers with SSL/TLS by setting
* [PNConfiguration.secure] to `true` during initialization.
*
* **Publish Anytime**
*
*
* It is not required to be subscribed to a channel in order to publish to that channel.
*
* **Message Data:**
*
*
* The message argument can contain any JSON serializable data, including: Objects, Arrays, Integers and Strings.
* Data should not contain special Java/Kotlin classes or functions as these will not serialize.
* String content can include any single-byte or multi-byte UTF-8 character.
*
*
* @param message The payload.
* **Warning:** It is important to note that you should not serialize JSON
* when sending signals/messages via PubNub.
* Why? Because the serialization is done for you automatically.
* Instead just pass the full object as the message payload.
* PubNub takes care of everything for you.
* @param meta Metadata object which can be used with the filtering ability.
* @param shouldStore Store in history.
* If not specified, then the history configuration of the key is used.
* @param usePost Use HTTP POST to publish. Default is `false`
* @param replicate Replicate the message. Is set to `true` by default.
* @param ttl Set a per message time to live in storage.
* - If `shouldStore = true`, and `ttl = 0`, the message is stored
* with no expiry time.
* - If `shouldStore = true` and `ttl = X` (`X` is an Integer value),
* the message is stored with an expiry time of `X` hours.
* - If `shouldStore = false`, the `ttl` parameter is ignored.
* - If ttl isn't specified, then expiration of the message defaults
* back to the expiry value for the key.
*/
fun publish(
message: Any,
meta: Any? = null,
shouldStore: Boolean = true,
usePost: Boolean = false,
replicate: Boolean = true,
ttl: Int? = null
): Publish
/**
* Send a signal to all subscribers of the channel.
*
* By default, signals are limited to a message payload size of 30 bytes.
* This limit applies only to the payload, and not to the URI or headers.
* If you require a larger payload size, please [contact support](mailto:[email protected]).
*
* @param message The payload which will be serialized and sent.
*/
fun signal(message: Any): Signal
/**
* Send a message to PubNub Functions Event Handlers.
*
* These messages will go directly to any Event Handlers registered on the channel that you fire to
* and will trigger their execution. The content of the fired request will be available for processing
* within the Event Handler.
*
* The message sent via `fire()` isn't replicated, and so won't be received by any subscribers to the channel.
* The message is also not stored in history.
*
*
* @param message The payload.
* **Warning:** It is important to note that you should not serialize JSON
* when sending signals/messages via PubNub.
* Why? Because the serialization is done for you automatically.
* Instead just pass the full object as the message payload.
* PubNub takes care of everything for you.
* @param meta Metadata object which can be used with the filtering ability.
* If not specified, then the history configuration of the key is used.
* @param usePost Use HTTP POST to publish. Default is `false`
* @param ttl Set a per message time to live in storage.
* - If `shouldStore = true`, and `ttl = 0`, the message is stored
* with no expiry time.
* - If `shouldStore = true` and `ttl = X` (`X` is an Integer value),
* the message is stored with an expiry time of `X` hours.
* - If `shouldStore = false`, the `ttl` parameter is ignored.
* - If ttl isn't specified, then expiration of the message defaults
* back to the expiry value for the key.
*/
fun fire(
message: Any,
meta: Any? = null,
usePost: Boolean = false,
ttl: Int? = null
): Publish
/**
* Upload file / data to the Channel.
*
* @param fileName Name of the file to send.
* @param inputStream Input stream with file content. The inputStream will be depleted after the call.
* @param message The payload.
* **Warning:** It is important to note that you should not serialize JSON
* when sending signals/messages via PubNub.
* Why? Because the serialization is done for you automatically.
* Instead just pass the full object as the message payload.
* PubNub takes care of everything for you.
* @param meta Metadata object which can be used with the filtering ability.
* @param ttl Set a per message time to live in storage.
* - If `shouldStore = true`, and `ttl = 0`, the message is stored
* with no expiry time.
* - If `shouldStore = true` and `ttl = X` (`X` is an Integer value),
* the message is stored with an expiry time of `X` hours.
* - If `shouldStore = false`, the `ttl` parameter is ignored.
* - If ttl isn't specified, then expiration of the message defaults
* back to the expiry value for the key.
* @param shouldStore Store in history.
* If not specified, then the history configuration of the key is used.
* @param cipherKey Key to be used to encrypt uploaded data.
*/
fun sendFile(
fileName: String,
inputStream: Uploadable,
message: Any? = null,
meta: Any? = null,
ttl: Int? = null,
shouldStore: Boolean? = null,
cipherKey: String? = null
): SendFile
/**
* Delete file from the Channel.
*
* @param fileName Name under which the uploaded file is stored.
* @param fileId Unique identifier for the file, assigned during upload.
*/
fun deleteFile(fileName: String, fileId: String): DeleteFile
}