| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package support |
| |
| // tag::instance_extension[] |
| class MaxRetriesExtension { // <1> |
| static void maxRetries(Integer self, Closure code) { // <2> |
| assert self >= 0 |
| int retries = self |
| Throwable e = null |
| while (retries > 0) { |
| try { |
| code.call() |
| break |
| } catch (Throwable err) { |
| e = err |
| retries-- |
| } |
| } |
| if (retries == 0 && e) { |
| throw e |
| } |
| } |
| } |
| // end::instance_extension[] |
