| /** |
| * 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 com.twitter.distributedlog.service.streamset; |
| |
| import org.apache.commons.lang3.StringUtils; |
| |
| /** |
| * Stream Partition Converter that converts the stream name into a stream-to-partition mapping by delimiter. |
| */ |
| public class DelimiterStreamPartitionConverter extends CacheableStreamPartitionConverter { |
| |
| private final String delimiter; |
| |
| public DelimiterStreamPartitionConverter() { |
| this("_"); |
| } |
| |
| public DelimiterStreamPartitionConverter(String delimiter) { |
| this.delimiter = delimiter; |
| } |
| |
| @Override |
| protected Partition newPartition(String streamName) { |
| String[] parts = StringUtils.split(streamName, delimiter); |
| if (null != parts && parts.length == 2) { |
| try { |
| int partition = Integer.parseInt(parts[1]); |
| return new Partition(parts[0], partition); |
| } catch (NumberFormatException nfe) { |
| // ignore the exception |
| } |
| } |
| return new Partition(streamName, 0); |
| } |
| } |