src/main/java/org/onap/dmaap/dbcapi/database/LoadSchema.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * org.onap.dmaap
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.dmaap.dbcapi.database;
  22
  23 import java.io.*;
  24 import java.sql.*;
  25
  26 import com.att.eelf.configuration.EELFLogger;
  27 import com.att.eelf.configuration.EELFManager;
  28
  29 public class LoadSchema {
  30         private static final EELFLogger logger = EELFManager.getInstance().getLogger(LoadSchema.class);
  31
  32         static int getVer(Statement s) throws SQLException {
  33                 ResultSet rs = null;
  34                 try {
  35                         rs = s.executeQuery("SELECT version FROM dmaapbc_sch_ver");
  36                         rs.next();
  37                         return(rs.getInt(1));
  38                 } finally {
  39                         if (rs != null) {
  40                                 rs.close();
  41                         }
  42                 }
  43         }
  44         static void upgrade() throws SQLException {
  45                 ConnectionFactory cf = ConnectionFactory.getDefaultInstance();
  46                 InputStream is = null;
  47                 try(
  48                                 Connection c = cf.get(true);
  49                                 Statement stmt = c.createStatement();
  50                 ) {
  51
  52
  53                         // this sets the PG search_path to a consistent schema, otherwise sometimes
  54                         // we get public, and sometimes we get dmaap_admin
  55                         String cmd = String.format( "SET search_path to %s;", cf.getSchema());
  56                         try {
  57                                 stmt.execute(cmd);
  58                                 logger.info("SCHEMA: " + cmd);
  59                         } catch (SQLException sqle) {
  60                                 logger.error("Error", sqle);
  61                                         throw sqle;
  62                         }
  63
  64
  65                         // determine if an upgrade is needed
  66                         int newver = -1;
  67                         try {
  68                                 newver = getVer(stmt);
  69                         } catch (Exception e) {
  70                                 logger.error("Error", e);
  71                         }
  72                         logger.info("Database schema currently at version " + newver++);
  73
  74
  75
  76                         while ((is = LoadSchema.class.getClassLoader().getResourceAsStream("schema_" + newver + ".sql")) != null) {
  77                                 logger.info("Upgrading database schema to version " + newver);
  78                                 BufferedReader br = new BufferedReader(new InputStreamReader(is));
  79                                 String s;
  80                                 String sofar = null;
  81
  82
  83
  84                                 while ((s = br.readLine()) != null) {
  85                                         logger.info("SCHEMA: " + s);
  86                                         s = s.trim();
  87                                         if (s.length() == 0 || s.startsWith("--")) {
  88                                                 continue;
  89                                         }
  90                                         if (sofar == null) {
  91                                                 sofar = s;
  92                                         } else {
  93                                                 sofar = sofar + " " + s;
  94                                         }
  95                                         if (s.endsWith(";")) {
  96                                                 sofar = sofar.substring(0, sofar.length() - 1);
  97                                                 boolean ignore = false;
  98                                                 if (sofar.startsWith("@")) {
  99                                                         ignore = true;
 100                                                         sofar = sofar.substring(1).trim();
 101                                                 }
 102                                                 try {
 103                                                         stmt.execute(sofar);
 104                                                 } catch (SQLException sqle) {
 105                                                         if (!ignore) {
 106                                                                 throw sqle;
 107                                                         }
 108                                                 }
 109                                                 sofar = null;
 110                                         }
 111                                 }
 112                                 is.close();
 113                                 is = null;
 114                                 if (getVer(stmt) != newver) {
 115                                         throw new SQLException("Schema version not properly updated to " + newver + " by upgrade script");
 116                                 }
 117                                 logger.info("Upgrade to database schema version " + newver + " successful");
 118                                 newver++;
 119                         }
 120                 } catch (IOException ioe) {
 121                         throw new SQLException(ioe);
 122                 }
 123         }
 124         public static void main(String[] args) throws Exception {
 125                 upgrade();
 126         }
 127 }