public void createOrUpdateItem(final String key, final String value, final String comment) {
        OpenItemDTO openItemDTO = new OpenItemDTO();
        openItemDTO.setKey(key);
        openItemDTO.setValue(value);
        openItemDTO.setComment(comment);
        openItemDTO.setDataChangeCreatedBy(operatorUser);
        openItemDTO.setDataChangeLastModifiedBy(operatorUser);
        Date now = new Date();
        openItemDTO.setDataChangeCreatedTime(now);
        openItemDTO.setDataChangeLastModifiedTime(now);

        this.apolloOpenApiClient.createOrUpdateItem(
                apolloConfig.getAppId(),
                apolloConfig.getEnv(),
                apolloConfig.getClusterName(),
                apolloConfig.getNamespace(),
                openItemDTO
        );
    }
create or update item into namespace.
@param key item key
@param value item value
@param comment item comment
shenyu-admin-listener/shenyu-admin-listener-apollo/src/main/java/org/apache/shenyu/admin/listener/apollo/ApolloClient.java