class BroadcastMessageHandler extends IMHandler<WFCMessage.Message> {
    @Override
    public ErrorCode action(ByteBuf ackPayload, String clientID, String fromUser, ProtoConstants.RequestSourceType requestSourceType, WFCMessage.Message message, Qos1PublishHandler.IMCallback callback) {<FILL_FUNCTION_BODY>}

}

        ErrorCode errorCode = ErrorCode.ERROR_CODE_SUCCESS;
        boolean isAdmin = requestSourceType == ProtoConstants.RequestSourceType.Request_From_Admin;
        if (message != null) {
            if (!isAdmin) {  //only admin can broadcast message
                return ErrorCode.ERROR_CODE_NOT_RIGHT;
            }

            long timestamp = System.currentTimeMillis();
            long messageId = 0;
            try {
                messageId = MessageShardingUtil.generateId();
            } catch (Exception e) {
                e.printStackTrace();
                return ErrorCode.ERROR_CODE_SERVER_ERROR;
            }
            message = message.toBuilder().setFromUser(fromUser).setMessageId(messageId).setServerTimestamp(timestamp).setConversation(WFCMessage.Conversation.newBuilder().setTarget(fromUser).setLine(message.getConversation().getLine()).setType(ProtoConstants.ConversationType.ConversationType_Private).build()).build();

            long count = saveAndBroadcast(fromUser, clientID, message);
            ackPayload = ackPayload.capacity(20);
            ackPayload.writeLong(messageId);
            ackPayload.writeLong(count);
        } else {
            errorCode = ErrorCode.ERROR_CODE_INVALID_MESSAGE;
        }
        return errorCode;
    
<methods>public void <init>() ,public abstract cn.wildfirechat.common.ErrorCode action(ByteBuf, java.lang.String, java.lang.String, cn.wildfirechat.proto.ProtoConstants.RequestSourceType, cn.wildfirechat.proto.WFCMessage.Message, io.moquette.spi.impl.Qos1PublishHandler.IMCallback) ,public void afterAction(java.lang.String, java.lang.String, java.lang.String, io.moquette.spi.impl.Qos1PublishHandler.IMCallback) ,public void doHandler(java.lang.String, java.lang.String, java.lang.String, byte[], io.moquette.spi.impl.Qos1PublishHandler.IMCallback, cn.wildfirechat.proto.ProtoConstants.RequestSourceType) ,public static io.moquette.spi.impl.MessagesPublisher getPublisher() ,public static void init(io.moquette.spi.IMessagesStore, io.moquette.spi.ISessionsStore, io.moquette.spi.impl.MessagesPublisher, cn.wildfirechat.server.ThreadPoolExecutorWrapper, io.moquette.server.Server) ,public cn.wildfirechat.common.ErrorCode preAction(java.lang.String, java.lang.String, java.lang.String, io.moquette.spi.impl.Qos1PublishHandler.IMCallback, cn.wildfirechat.proto.ProtoConstants.RequestSourceType) <variables>protected static final Logger LOG,protected static java.lang.String actionName,private Class#RAW dataCls,private static win.liyufan.im.RateLimiter mLimitCounter,protected static io.moquette.server.Server mServer,private static cn.wildfirechat.server.ThreadPoolExecutorWrapper m_imBusinessExecutor,protected static io.moquette.spi.IMessagesStore m_messagesStore,protected static io.moquette.spi.ISessionsStore m_sessionsStore,private java.lang.reflect.Method parseDataMethod,protected static io.moquette.spi.impl.MessagesPublisher publisher