| /* |
| * 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 org.apache.solr.update.processor; |
| import java.nio.charset.StandardCharsets; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| public class MD5Signature extends Signature { |
| private static ThreadLocal<MessageDigest> DIGESTER_FACTORY = new ThreadLocal<MessageDigest>() { |
| @Override |
| protected MessageDigest initialValue() { |
| try { |
| return MessageDigest.getInstance("MD5"); |
| } catch (NoSuchAlgorithmException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| }; |
| private MessageDigest digester; |
| |
| public MD5Signature() { |
| digester = DIGESTER_FACTORY.get(); |
| digester.reset(); |
| } |
| |
| @Override |
| public void add(String content) { |
| digester.update(content.getBytes(StandardCharsets.UTF_8)); |
| } |
| |
| @Override |
| public byte[] getSignature() { |
| return digester.digest(); |
| } |
| } |