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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.database;
20  
21  
22  import java.text.SimpleDateFormat;
23  import java.util.Calendar;
24  import java.util.Date;
25  import java.util.HashMap;
26  import java.util.Iterator;
27  import org.apache.commons.logging.Log;
28  import org.apache.commons.logging.LogFactory;
29  import org.apache.hadoop.chukwa.util.DatabaseWriter;
30  
31  public class DataExpiration {
32    private static DatabaseConfig dbc = null;
33    private static Log log = LogFactory.getLog(DataExpiration.class);
34  
35    public DataExpiration() {
36      if (dbc == null) {
37        dbc = new DatabaseConfig();
38      }
39    }
40  
41    public void dropTables(long start, long end) {
42      String cluster = System.getProperty("CLUSTER");
43      if (cluster == null) {
44        cluster = "unknown";
45      }
46      DatabaseWriter dbw = new DatabaseWriter(cluster);
47      try {
48        HashMap<String, String> dbNames = dbc.startWith("report.db.name.");
49        Iterator<String> ki = dbNames.keySet().iterator();
50        while (ki.hasNext()) {
51          String name = ki.next();
52          String tableName = dbNames.get(name);
53          String[] tableList = dbc.findTableName(tableName, start, end);
54          for (String tl : tableList) {
55            log.debug("table name: " + tableList[0]);
56            try {
57              String[] parts = tl.split("_");
58              int partition = Integer.parseInt(parts[parts.length - 2]);
59              String table = "";
60              for (int i = 0; i < parts.length - 2; i++) {
61                if (i != 0) {
62                  table = table + "_";
63                }
64                table = table + parts[i];
65              }
66              partition = partition - 3;
67              String dropPartition = "drop table if exists " + table + "_"
68                  + partition + "_" + parts[parts.length - 1];
69              dbw.execute(dropPartition);
70              partition--;
71              if(partition>=0) {
72                dropPartition = "drop table if exists " + table + "_" + partition
73                    + "_" + parts[parts.length - 1];
74                dbw.execute(dropPartition);
75              }
76            } catch (NumberFormatException e) {
77              log
78                  .error("Error in parsing table partition number, skipping table:"
79                      + tableList[0]);
80            } catch (ArrayIndexOutOfBoundsException e) {
81              log.debug("Skipping table:" + tableList[0]
82                  + ", because it has no partition configuration.");
83            }
84          }
85        }
86        dbw.close();
87      } catch (Exception e) {
88        e.printStackTrace();
89      }
90    }
91  
92    public static void usage() {
93      System.out.println("DataExpiration usage:");
94      System.out
95          .println("java -jar chukwa-core.jar org.apache.hadoop.chukwa.DataExpiration <date> <time window size>");
96      System.out.println("     date format: YYYY-MM-DD");
97      System.out.println("     time window size: 7, 30, 91, 365");
98    }
99  
100   public static void main(String[] args) {
101     DataExpiration de = new DataExpiration();
102     long now = (new Date()).getTime();
103     long start = now;
104     long end = now;
105     if (args.length == 2) {
106       SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
107       try {
108         long dataExpStart = Calendar.getInstance().getTimeInMillis();
109         start = sdf.parse(args[0]).getTime();
110         end = start + (Long.parseLong(args[1]) * 1440 * 60 * 1000L);
111         de.dropTables(start, end);
112         long dataExpEnd = Calendar.getInstance().getTimeInMillis();
113         log.info("DataExpiration for: "+args[0]+" "+args[1]+" finished: ("+(double) (dataExpEnd-dataExpStart)/1000+" seconds)");
114       } catch (Exception e) {
115         usage();
116       }
117     } else {
118       usage();
119     }
120   }
121 }