An Signaling token stays valid for 24 hours. Agora recommends that you generate the token from your server and call
renewToken to update the token for the SDK at a fixed interval, such as one hour. See Generate the Signaling token to learn more about generating a token from your server.
The following code example shows how to update the token at a fixed interval:
(C++ SDK, Java SDK) Memory leaks may occur if you do not release resources in time. Although the GC (Garbage Collection) mechanism of Java can recycle Java objects, the low-level C++ API still uses Java objects for callbacks and may cause the app to crash.
Agora recommends that you call
release to release Signaling client objects and channel objects.
(All SDKs) If you have released the Signaling client object, Agora recommends that you do not access the related resources. Also, you cannot access the
RtmCallManager object after releasing the Signaling client object.
(C++ SDK, Java SDK, Objective-C SDK) If you call
release to release a channel object in a callback of the channel object, the app will hang. The reason is that the callback adds a lock to the object and the
release method requires the same lock.
(C++ SDK) The objects
IChannel have corresponding listeners, namely
IChannelEventHandler, respectively. You must ensure that lifecycles of these listeners are longer than their objects.
(Objective-C SDK before v1.4.1) The lifecycle of the
AgoraRtmChannel object must be longer than that of the
AgoraRtmKit object; otherwise, the
AgoraRtmKit object may use the released
AgoraRtmChannel object, causing your app to crash.
Each callback of an Signaling client instance runs in the same thread. A callback starts to execute when the previous callback finishes executing. If the previous callback takes too much time to execute, the callback cannot execute in time, and the queue of callbacks keeps growing.
For the Signaling Native SDK, if the queue size reaches a certain limit, additional callbacks are discarded.
For the Signaling Web SDK, the queue size does not have a limit, but a long callback queue may cause performance issues.
(All SDKs) Agora recommends that you execute callbacks in time and try to reduce the execution time of callbacks. Otherwise, the callbacks that follow may be blocked or lost.
*(Linux C /Linux Java SDK)* The Signaling Linux C / Linux Java server SDK does not block the SIGPIPE signal. You need to choose whether to block the SIGPIPE signal based on your use case. Generally, you need to block this signal. Otherwise, the client process exits by default after receiving the signal.
(C++ SDK, v1.4.2 or later ) Use the
(Objective-C SDK version 1.4.3 and later) Whether your development language is Objective-C or Swift, Agora recommends that you use the
AgoraRtmKit_swift.hfile in the SDK package.
You need to follow the "first in, last out" stack operation sequence when initializing and destroying Video and Signaling SDK, that is, the SDK which is initialized later is destroyed first, for example:
Video SDK initialization → Signaling initialization → Signaling destruction → Video SDK destruction or Signaling initialization → Video SDK initialization → Video SDK destruction → Signaling destruction