public void setInternalExtParam(String key, String value) {
        if (internalExtParams == null) {
            internalExtParams = new HashMap<String, String>();
        }
        internalExtParams.put(key, value);
    }
@author Robert HG (254963746@qq.com) on 6/13/15.
lts-core/src/main/java/com/github/ltsopensource/core/domain/JobMeta.java