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

        long[] head = new long[2];
        ErrorCode errorCode = m_messagesStore.deleteFriend(fromUser, request.getId(), head);
        if (errorCode == ERROR_CODE_SUCCESS) {
            publisher.publishNotification(IMTopic.NotifyFriendTopic, fromUser, head[0]);
            publisher.publishNotification(IMTopic.NotifyFriendTopic, request.getId(), head[1]);
        }
        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.IDBuf, 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