Github user jerrypeng commented on a diff in the pull request: https://github.com/apache/storm/pull/746#discussion_r40849130 --- Diff: storm-core/src/jvm/backtype/storm/networktopography/AbstractDNSToSwitchMapping.java --- @@ -0,0 +1,97 @@ +/** + * 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 backtype.storm.networktopography; + +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +/** + * This is a base class for DNS to Switch mappings. <p/> It is not mandatory to + * derive {@link DNSToSwitchMapping} implementations from it, but it is strongly + * recommended, as it makes it easy for the developers to add new methods + * to this base class that are automatically picked up by all implementations. + * <p/> + * + */ +public abstract class AbstractDNSToSwitchMapping + implements DNSToSwitchMapping { + +// private Configuration conf; --- End diff -- will remove
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