| .TH "offline_publish" 3 "Thu Sep 13 2018" "Paho Asynchronous MQTT C Client Library" \" -*- nroff -*- |
| .ad l |
| .nh |
| .SH NAME |
| offline_publish \- Publish While Disconnected |
| This feature was not originally available because with persistence enabled, messages could be stored locally without ever knowing if they could be sent\&. The client application could have created the client with an erroneous broker address or port for instance\&. |
| .PP |
| To enable messages to be published when the application is disconnected \fBMQTTAsync_createWithOptions\fP must be used instead of \fBMQTTAsync_create\fP to create the client object\&. The ::createOptions field sendWhileDisconnected must be set to non-zero, and the maxBufferedMessages field set as required - the default being 100\&. |
| .PP |
| \fBMQTTAsync_getPendingTokens\fP can be called to return the ids of the messages waiting to be sent, or for which the sending process has not completed\&. |
