
io.servicefabric.transport.utils.ChannelFutureUtils Maven / Gradle / Ivy
package io.servicefabric.transport.utils;
import com.google.common.util.concurrent.SettableFuture;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
public class ChannelFutureUtils {
/**
* Forward netty's {@code channelFuture} result(success/fail) to guava's {@code promise}.
*
* @param channelFuture netty's future
* @param promise user passed guava's future (can be null)
*/
public static void setPromise(ChannelFuture channelFuture, final SettableFuture promise) {
if (promise != null) {
channelFuture.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
if (!future.isSuccess()) {
promise.setException(future.cause());
} else {
promise.set(future.get());
}
}
});
}
}
/**
* @return wrapped {@link ChannelFutureListener} that forwards the Throwable (if any) of given {@code cfl} into the ChannelPipeline.
*/
public static ChannelFutureListener wrap(final ChannelFutureListener cfl) {
return new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
try {
cfl.operationComplete(future);
} catch (Exception e) {
future.channel().pipeline().fireExceptionCaught(e);
}
}
};
}
}
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