ThreadPoolExhaustedListener 在最新版本中未发现用户配置的入口，这个功能的设计初衷我理解，是发生线程池耗尽通知给应用，目前没看到应用如何添加监听的地方。
return keepAlive;
    }
    public void setKeepAlive(Boolean keepAlive) {
        this.keepAlive = keepAlive;
    }
    public String getOptimizer() {
        return optimizer;
    }
    public void setOptimizer(String optimizer) {
        this.optimizer = optimizer;
    }
    public String getExtension() {
        return extension;
    }
    public void setExtension(String extension) {
        this.extension = extension;
    }
    @Override
    @Parameter(excluded = true, attribute = false)
    public boolean isValid() {
        return StringUtils.isNotEmpty(name);
    }
    public String getExtProtocol() {
        return extProtocol;
    }
    public void setExtProtocol(String extProtocol) {
        this.extProtocol = extProtocol;
    }
}