Publish Strings¶
The example demonstrates publishing a string value and creating a subscriber for string messages. The message is published into the demo
channel.
Subscriber¶
Important
Make sure to replace xxxx in the domain name in the sample requests below to the one assigned to your application.
Establishing a subscription¶
Request:
curl -H Content-Type:application/json -X POST -d '{}' \
-v https://xxxx.backendless.app/messaging/demo/subscribe
{
"subscriptionId" : "1111-1111-1111-11111"
}
Retrieving messages¶
Request:
curl -X GET
-v https://xxxx.backendless.app/messaging/demo/1111-1111-1111-11111
{
"messages":[
{
"headers":{
"DSId":"FC6FB0BB-4449-0D1D-FFAE-4670D1138200",
"DSDstClientId":"AD12813D-7BC1-A216-FF65-E86D00A14000",
"BL_APPLICATION_ID":"APP-ID",
"BL_VERSION_URL_PREFIX":"v1"
},
"publishedAt":1359071622226,
"publisherId":null,
"data":"It's a great day!",
"messageId":"D98A994C-7EF6-7DE2-FFC3-95807BDF8700-4428"
}
]
}
Publisher¶
curl -X POST \
https://api.backendless.com/APP-ID/REST-API-KEY/messaging/demo \
-H 'content-type: application/json' \
-d '{ "message": "It's a great day!" }'
Backendless.Messaging.publish( "demo", "It's a great day!" )
.then( function( result ) {
console.log( "message has been published" );
})
.catch( function( error ) {
console.log( "error publishing the message - " + error );
})
Backendless.Messaging.publish( "demo",
"It is a great day!",
new AsyncCallback<MessageStatus>()
{
@Override
public void handleResponse( MessageStatus response )
{
Log.i( "MYAPP", "Message has been published" );
}
@Override
public void handleFault( BackendlessFault fault )
{
Log.e( "MYAPP", "Error publishing the message" );
}
} );
Backendless.shared.messaging.publish(channelName: "demo", message: "It is a great day!", responseHandler: { messageStatus in
print("Message has been published")
}, errorHandler: { fault in
print("Error: \(fault.message ?? "")")
})
[Backendless.shared.messaging publishWithChannelName:@"demo" message:@"It is a great day!" responseHandler:^(MessageStatus *messageStatus) {
NSLog(@"Message has been published");
} errorHandler:^(Fault *fault) {
NSLog(@"Error: %@", fault.message);
}];
AsyncCallback<MessageStatus> callback = new AsyncCallback<MessageStatus>(
messageStatus =>
{
Console.WriteLine( $"message has been published {messageStatus.MessageId}");
},
fault =>
{
Console.WriteLine( $"error {fault.Message}");
}
);
Backendless.Messaging.Publish( "demo",
"It is a great day!",
callback );
Backendless.messaging.publish("It is a great day!", channelName: "demo").then((response) {
print("Message has been published");
});