public JobClientBuilder setJobCompletedHandler(JobCompletedHandler jobCompletedHandler) {
        this.jobCompletedHandler = jobCompletedHandler;
        return this;
    }
@author Robert HG (254963746@qq.com) on 4/21/16.
lts-jobclient/src/main/java/com/github/ltsopensource/jobclient/JobClientBuilder.java