libdatachannel-java

Java wrappers for libdatachannel, a WebRTC Data Channels standalone implementation in C++.

Usage

Gradle (build.gradle.kts)

implementation("tel.schich:libdatachannel-java:0.22.6.1")

Maven (pom.xml)

<dependency>
    <groupId>tel.schich</groupId>
    <artifactId>libdatachannel-java</artifactId>
    <version>0.22.6.1</version>
</dependency>

Additionally, pull the architecture-specific native components. Alternatively, use the libdatachannel-java-arch-detect module, which includes common architectures and has code to detect which one to apply.

Offerer example

var cfg = RTCConfiguration.of("stun.l.google.com:19302");
// try with resources to cleanup peer when done
try (var peer = RTCPeerConnection.createPeer(cfg)) {
    // when complete send sdp to remote peer
    peer.onGatheringStateChange((pc, state) -> {
        if (RTC_GATHERING_COMPLETE == state) {
            var sdp = pc.localDescription();
            System.out.println(sdp);
        }
    });
    // create data channel
    var channel = peer.createDataChannel("test");
    // wait for local sdp...
    // then set answer from remote peer
    peer.setAnswer(readInput());
    // register message callback
    channel.onMessage((c, message, size) -> System.out.println("Incoming message: " + new String(message)));
    // block until channel is closed
    CompletableFuture<Void> future = new CompletableFuture<>();
    channel.onClose(c -> future.completeAsync(() -> null));
    future.join();
}

Examples

• Web Example: https://pschichtel.github.io/libdatachannel-java/ (Source)

See tests for more examples