import com.google.bitcoin.protocols.channels.ServerConnectionEventHandler; //导入依赖的package包/类
@Override
public ServerConnectionEventHandler onNewConnection(final SocketAddress clientAddress) {
    // Each connection needs a handler which is informed when that payment channel gets adjusted. Here we just log
    // things. In a real app this object would be connected to some business logic.
    return new ServerConnectionEventHandler() {
        @Override
        public void channelOpen(Sha256Hash channelId) {
            log.info("Channel open for {}: {}.", clientAddress, channelId);

            // Try to get the state object from the stored state set in our wallet
            PaymentChannelServerState state = null;
            try {
                state = storedStates.getChannel(channelId).getOrCreateState(appKit.wallet(), appKit.peerGroup());
            } catch (VerificationException e) {
                // This indicates corrupted data, and since the channel was just opened, cannot happen
                throw new RuntimeException(e);
            }
            log.info("   with a maximum value of {}, expiring at UNIX timestamp {}.",
                    // The channel's maximum value is the value of the multisig contract which locks in some
                    // amount of money to the channel
                    state.getMultisigContract().getOutput(0).getValue(),
                    // The channel expires at some offset from when the client's refund transaction becomes
                    // spendable.
                    state.getRefundTransactionUnlockTime() + StoredPaymentChannelServerStates.CHANNEL_EXPIRE_OFFSET);
        }

        @Override
        public void paymentIncrease(BigInteger by, BigInteger to) {
            log.info("Client {} paid increased payment by {} for a total of " + to.toString(), clientAddress, by);
        }

        @Override
        public void channelClosed(PaymentChannelCloseException.CloseReason reason) {
            log.info("Client {} closed channel for reason {}", clientAddress, reason);
        }
    };
}
 

import com.google.bitcoin.protocols.channels.ServerConnectionEventHandler; //导入依赖的package包/类
@Nullable
@Override
public native ServerConnectionEventHandler onNewConnection(SocketAddress clientAddress);