public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("hash [" + this.hashCode() + "]\n");
		sb.append("isConnected [" + isConnected() + "]\n");
		sb.append("count of callbacks [" + getConnCallbackSize() + "]");
		if (this.getConnectionDetail() !=null)
			sb.append("detail [" + this.getConnectionDetail().toString() + "]\n");
		return sb.toString();
	}