1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.apache.hadoop.chukwa.util;
20
21 import java.security.MessageDigest;
22 import java.security.NoSuchAlgorithmException;
23
24 public class AdaptorNamingUtils {
25
26 public static String synthesizeAdaptorID(String adaptorClassName, String dataType,
27 String params) throws NoSuchAlgorithmException {
28 MessageDigest md;
29 md = MessageDigest.getInstance("MD5");
30
31 md.update(adaptorClassName.getBytes());
32 md.update(dataType.getBytes());
33 md.update(params.getBytes());
34 StringBuilder sb = new StringBuilder();
35 sb.append("adaptor_");
36 byte[] bytes = md.digest();
37 for(int i=0; i < bytes.length; ++i) {
38 if( (bytes[i] & 0xF0) == 0)
39 sb.append('0');
40 sb.append( Integer.toHexString(0xFF & bytes[i]) );
41 }
42 return sb.toString();
43
44 }
45
46 }