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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.sql.ResultSet;
23  import java.sql.SQLException;
24  import java.text.SimpleDateFormat;
25  import java.util.Date;
26  import java.util.HashMap;
27  import java.util.Iterator;
28  import org.apache.commons.logging.Log;
29  import org.apache.commons.logging.LogFactory;
30  import org.apache.hadoop.chukwa.util.DatabaseWriter;
31  import org.apache.hadoop.chukwa.util.ExceptionUtil;
32  import org.apache.hadoop.chukwa.util.RegexUtil;
33  
34  public class TableCreator {
35    private static DatabaseConfig dbc = null;
36    private static Log log = LogFactory.getLog(TableCreator.class);
37  
38    public TableCreator() {
39      if (dbc == null) {
40        dbc = new DatabaseConfig();
41      }
42    }
43  
44    public void createTables() throws Exception {
45      long now = (new Date()).getTime();
46      createTables(now, now);
47    }
48  
49    public void createTables(long start, long end) throws Exception {
50      String cluster = System.getProperty("CLUSTER");
51      if (cluster == null) {
52        cluster = "unknown";
53      }
54      DatabaseWriter dbw = new DatabaseWriter(cluster);
55      HashMap<String, String> dbNames = dbc.startWith("report.db.name.");
56      Iterator<String> ki = dbNames.keySet().iterator();
57      while (ki.hasNext()) {
58        String name = ki.next();
59        String tableName = dbNames.get(name);
60        if (!RegexUtil.isRegex(tableName)) {
61          log.warn("Skipping tableName: '" + tableName
62              + "' because there was an error parsing it as a regex: "
63              + RegexUtil.regexError(tableName));
64          return;
65        }
66        String[] tableList = dbc.findTableName(tableName, start, end);
67        log.debug("table name: " + tableList[0]);
68        try {
69          String[] parts = tableList[0].split("_");
70          int partition = Integer.parseInt(parts[parts.length - 2]);
71          String table = "";
72          for (int i = 0; i < parts.length - 2; i++) {
73            if (i != 0) {
74              table = table + "_";
75            }
76            table = table + parts[i];
77          }
78          String query = "show create table " + table + "_template;";
79          ResultSet rs = dbw.query(query);
80          while (rs.next()) {
81            log.debug("table schema: " + rs.getString(2));
82            query = rs.getString(2);
83            log.debug("template table name:" + table + "_template");
84            log.debug("replacing with table name:" + table + "_" + partition
85                + "_" + parts[parts.length - 1]);
86            log.debug("creating table: " + query);
87            String createPartition = query.replaceFirst(table + "_template",
88                table + "_" + partition + "_" + parts[parts.length - 1]);
89            createPartition = createPartition.replaceFirst("TABLE",
90                "TABLE IF NOT EXISTS");
91            dbw.execute(createPartition);
92            partition++;
93            createPartition = query.replaceFirst(table + "_template", table
94                + "_" + partition + "_" + parts[parts.length - 1]);
95            createPartition = createPartition.replaceFirst("TABLE",
96                "TABLE IF NOT EXISTS");
97            dbw.execute(createPartition);
98            partition++;
99            createPartition = query.replaceFirst(table + "_template", table
100               + "_" + partition + "_" + parts[parts.length - 1]);
101           createPartition = createPartition.replaceFirst("TABLE",
102               "TABLE IF NOT EXISTS");
103           dbw.execute(createPartition);
104         }
105       } catch (NumberFormatException e) {
106         log.error("Error in parsing table partition number, skipping table:"
107             + tableList[0]);
108       } catch (ArrayIndexOutOfBoundsException e) {
109         log.debug("Skipping table:" + tableList[0]
110             + ", because it has no partition configuration.");
111       } catch (SQLException e) {
112         throw e;
113       }
114     }
115   }
116 
117   public static void usage() {
118     System.out.println("TableCreator usage:");
119     System.out
120         .println("java -jar chukwa-core.jar org.apache.hadoop.chukwa.TableCreator <date> <time window size>");
121     System.out.println("     date format: YYYY-MM-DD");
122     System.out.println("     time window size: 7, 30, 91, 365, 3650");
123   }
124 
125   public static void main(String[] args) {
126     TableCreator tc = new TableCreator();
127     if (args.length == 2) {
128       try {
129         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
130         long start = sdf.parse(args[0]).getTime();
131         long end = start + (Long.parseLong(args[1]) * 1440 * 60 * 1000L);
132         tc.createTables(start, end);
133       } catch (Exception e) {
134         System.out.println("Invalid date format or time window size.");
135         e.printStackTrace();
136         usage();
137       }
138     } else {
139       try {
140         tc.createTables();
141       } catch (Exception e) {
142         log.error(ExceptionUtil.getStackTrace(e));
143       }
144     }
145 
146   }
147 }