Channel Groups API for PubNub POSIX C++ SDK

Channel Groups allows PubNub developers to bundle thousands of channels into a group that can be identified by name. These Channel Groups can then be subscribed to, receiving data from the many backend-channels the channel group contains.

Learn more about our Channel Groups here.

Channel Group operations

You can't publish to a Channel Group. You can only subscribe to it. To publish within Channel Group, you need to publish to each channel individually.

Adding Channels

Requires Stream Controller add-on Requires that the Stream Controller add-on is enabled for your key. See this page on enabling add-on features on your keys:
https://support.pubnub.com/hc/en-us/articles/360051974791-How-do-I-enable-add-on-features-for-my-keys-

Description

This function adds a channel to a channel group.

Method(s)

Adding Channels is accomplished by using the following method(s) in the Posix C++ SDK:

1. add_channel_to_group(std::vector<std::string> const &channel, std::vector<std::string> const &channel_group)
   

   Parameter	Type	Required	Description
   channel	std::vector <std::string>const &	Yes	The channel(s) vector to add to the channel group.
   channel_group	std::vector<std::string>const &	Yes	The channel_group to add to the channel(s).

   A future result (pubnub::futres). If transaction is successful, the response will be available via get_channel() function as one channel, a JSON object.

2. add_channel_to_group (std::string const &channel, std::string const &channel_group)
   

   Parameter	Type	Required	Description
   channel	std::string const &	Yes	The channel(s) to add to the channel group.
   channel_group	std::string const &	Yes	The channel_group to add the channel(s) to.

   A future result (pubnub::futres). If transaction is successful, the response will be available via get_channel() function as one channel, a JSON object.

Basic Usage

Adding Channels :

const std::string channel_group("family");

//Sync
static void add_channel(pubnub::context &pn) {
  enum pubnub_res res;

  try {
    res = pn.add_channel_to_group("wife", channel_group).await();

    if (PNR_OK == res) {
      std::cout <<  pn.get_channel() << std::endl;
    } else {
      std::cout << "Failed with code " << res << std::endl;
    }
  } catch (std::exception &ex) {
    std::cout << "Exception: " << ex.what() << std::endl;
  }
}

//Lambdas
static void add_channel(pubnub::context &ipn) {
  ipn.add_channel_to_group("wife", channel_group)
    .then([=](pubnub::context &pn, pubnub_res res) {
      if (PNR_OK == res) {
        std::cout <<  pn.get_channel() << std::endl;
      } else {
        std::cout << "Failed with code " << res << std::endl;
      }
  });
}

//Functions
static void on_added(pubnub::context &pn, pubnub_res res) {
  if (PNR_OK == res) {
    std::cout <<  pn.get_channel() << std::endl;
  } else {
    std::cout << "Failed with code " << res << std::endl;
  }
}

static void add_channel(pubnub::context &ipn) {
  ipn.add_channel_to_group("wife", channel_group).then(on_added);
}

Rest Response from Server

{
    "service" : "channel-registry",
    "status"  : 200,
    "error"   : false,
    "message" : "OK"
}

Listing Channels

Requires Stream Controller add-on Requires that the Stream Controller add-on is enabled for your key. See this page on enabling add-on features on your keys:
https://support.pubnub.com/hc/en-us/articles/360051974791-How-do-I-enable-add-on-features-for-my-keys-

Description

This function lists all the channels of the channel group.

Method(s)

Listing Channels is accomplished by using the following method(s) in the Posix C++ SDK:

1. list_channel_group (std::string const &channel_group)
   

   Parameter	Type	Required	Description
   channel_group	std::string const &	Yes	channel_group to fetch the channels of.

Basic Usage

Listing Channels :

const std::string channel_group("family");

//Sync
static void list_channels(pubnub::context &pn) {
  enum pubnub_res res;

  try {
    res = pn.list_channel_group(channel_group).await();

    if (PNR_OK == res) {
      std::cout <<  pn.get_channel() << std::endl;
    } else {
      std::cout << "Failed with code " << res << std::endl;
    }
  } catch (std::exception &ex) {
    std::cout << "Exception: " << ex.what() << std::endl;
  }
}

//Lambdas
static void list_channels(pubnub::context &ipn) {
  ipn.list_channel_group(channel_group)
    .then([=](pubnub::context &pn, pubnub_res res) {
      if (PNR_OK == res) {
        std::cout <<  pn.get_channel() << std::endl;
      } else {
        std::cout << "Failed with code " << res << std::endl;
      }
  });
}

//Functions
static void on_list_received(pubnub::context &pn, pubnub_res res) {
  if (PNR_OK == res) {
    std::cout <<  pn.get_channel() << std::endl;
  } else {
    std::cout << "Failed with code " << res << std::endl;
  }
}

static void list_channels(pubnub::context &ipn) {
  ipn.list_channel_group(channel_group).then(on_list_received);
}

Rest Response from Server

{
    "status" : 200,
    "payload" : {
        "channels" : ["hi"],
        "group" : "abcd"
    },
    "service" : "channel-registry",
    "error" : False
}

Removing Channels

Requires Stream Controller add-on Requires that the Stream Controller add-on is enabled for your key. See this page on enabling add-on features on your keys:
https://support.pubnub.com/hc/en-us/articles/360051974791-How-do-I-enable-add-on-features-for-my-keys-

Description

This function removes the channels from the channel group.

Method(s)

Removing Channels is accomplished by using the following method(s) in the Posix C++ SDK:

1. remove_channel_from_group (std::string const &channel, std::string const &channel_group)
   

   Parameter	Type	Required	Description
   channel_group	std::string const &	Yes	Specifies channel_group to remove the channels from.
   channel	std::string const &	Yes	The channel to remove from the channel group.

Basic Usage

Removing channels :

const std::string channel_group("family");

//Sync
static void remove_channel(pubnub::context &pn) {
  enum pubnub_res res;

  try {
    res = pn.remove_channel_from_group("son", channel_group).await();

    if (PNR_OK == res) {
      std::cout <<  pn.get_channel() << std::endl;
    } else {
      std::cout << "Failed with code " << res << std::endl;
    }
  } catch (std::exception &ex) {
    std::cout << "Exception: " << ex.what() << std::endl;
  }
}

//Lambdas

static void remove_channel(pubnub::context &ipn) {
  ipn.remove_channel_from_group("son", channel_group)
    .then([=](pubnub::context &pn, pubnub_res res) {
      if (PNR_OK == res) {
        std::cout <<  pn.get_channel() << std::endl;
      } else {
        std::cout << "Failed with code " << res << std::endl;
      }
  });
}

//Functions
static void on_removed(pubnub::context &pn, pubnub_res res) {
  if (PNR_OK == res) {
    std::cout <<  pn.get_channel() << std::endl;
  } else {
    std::cout << "Failed with code " << res << std::endl;
  }
}

static void remove_channel(pubnub::context &ipn) {
  ipn.remove_channel_from_group("son", channel_group).then(on_removed);
}

Rest Response from Server

{
    "status" : 200,
    "message" : "OK",
    "service" : "channel-registry",
    "error" : False
}

Deleting Channel Group

Requires Stream Controller add-on Requires that the Stream Controller add-on is enabled for your key. See this page on enabling add-on features on your keys:
https://support.pubnub.com/hc/en-us/articles/360051974791-How-do-I-enable-add-on-features-for-my-keys-

Description

This function removes the channel group.

Method(s)

Deleting Channel Group is accomplished by using the following method(s) in the Posix C++ SDK:

1. remove_channel_group (std::string const &channel_group)
   

   Parameter	Type	Required	Description
   channel_group	std::string const &	Yes	Specifies channel_group to remove.

Basic Usage

Deleting Channel Group :

const std::string channel_group("family");

//Sync
static void remove_group(pubnub::context &pn) {
  enum pubnub_res res;

  try {
    res = pn.remove_channel_group(channel_group).await();

    if (PNR_OK == res) {
      std::cout <<  pn.get_channel() << std::endl;
    } else {
      std::cout << "Failed with code " << res << std::endl;
    }
  } catch (std::exception &ex) {
    std::cout << "Exception: " << ex.what() << std::endl;
  }
}

//Lambdas
static void remove_group(pubnub::context &ipn) {
  ipn.remove_channel_group(channel_group)
    .then([=](pubnub::context &pn, pubnub_res res) {
      if (PNR_OK == res) {
        std::cout <<  pn.get_channel() << std::endl;
      } else {
        std::cout << "Failed with code " << res << std::endl;
      }
  });
}

//Functions
static void on_group_removed(pubnub::context &pn, pubnub_res res) {
  if (PNR_OK == res) {
    std::cout <<  pn.get_channel() << std::endl;
  } else {
    std::cout << "Failed with code " << res << std::endl;
  }
}

static void remove_group(pubnub::context &ipn) {
  ipn.remove_channel_group(channel_group).then(on_group_removed);
}

Rest Response from Server

{
    "status" : 200,
    "message" : "OK",
    "service" : "channel-registry",
    "error" : False
}