@Override
    public PkgCacheQuota getFactoryPkgCacheQuota() {
        if (baseMsgSenderFactory == null) {
            return null;
        }
        return baseMsgSenderFactory.getPkgCacheQuota();
    }
Singleton Message Sender Factory

Used to define the singleton sender factory
inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/MsgSenderSingleFactory.java