Mercurial Hosting > luan
annotate src/luan/modules/lucene/PostgresBackup.java @ 1447:851b9a48cc44
Luan.parse
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Tue, 18 Feb 2020 14:54:35 -0700 |
| parents | 56fb5cd8228d |
| children | 928be2a4d565 |
| rev | line source |
|---|---|
| 1387 | 1 package luan.modules.lucene; |
| 2 | |
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3 import java.io.IOException; |
| 1387 | 4 import java.sql.Connection; |
| 5 import java.sql.DriverManager; | |
| 6 import java.sql.Statement; | |
| 7 import java.sql.PreparedStatement; | |
| 8 import java.sql.SQLException; | |
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9 import java.sql.ResultSet; |
| 1387 | 10 import java.util.Properties; |
| 1391 | 11 import java.util.List; |
| 12 import java.util.ArrayList; | |
| 1392 | 13 import java.util.Map; |
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14 import luan.Luan; |
| 1387 | 15 import luan.LuanTable; |
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16 import luan.LuanFunction; |
| 1387 | 17 import luan.LuanException; |
| 1392 | 18 import luan.modules.Utils; |
| 1387 | 19 import luan.modules.parsers.LuanToString; |
| 1447 | 20 import luan.modules.parsers.LuanParser; |
| 21 import goodjava.parser.ParseException; | |
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22 import goodjava.logging.Logger; |
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23 import goodjava.logging.LoggerFactory; |
| 1387 | 24 |
| 25 | |
| 26 final class PostgresBackup { | |
| 1393 | 27 private static final Logger sysLogger = LoggerFactory.getLogger(PostgresBackup.class); |
| 28 | |
| 29 private final Logger luanLogger; | |
| 1387 | 30 |
| 31 final boolean wasCreated; | |
| 1391 | 32 private final String url; |
| 33 private final Properties props = new Properties(); | |
| 1387 | 34 private final Connection con; |
| 35 private final PreparedStatement insertStmt; | |
| 36 private final PreparedStatement updateStmt; | |
| 37 private final PreparedStatement deleteStmt; | |
| 38 private int trans = 0; | |
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39 private final LuanToString luanToString = new LuanToString(); |
| 1387 | 40 |
| 1420 | 41 PostgresBackup(Luan luan,LuanTable spec) |
| 1392 | 42 throws ClassNotFoundException, SQLException, LuanException |
| 1387 | 43 { |
| 1420 | 44 spec = new LuanTable(spec); |
| 1393 | 45 this.luanLogger = luan.getLogger(PostgresBackup.class); |
| 1392 | 46 /* |
| 1387 | 47 Class.forName("org.postgresql.Driver"); |
| 1391 | 48 url = "jdbc:postgresql://localhost:5432/luan"; |
| 1387 | 49 props.setProperty("user","postgres"); |
| 50 props.setProperty("password",""); | |
| 1392 | 51 */ |
| 52 String cls = "org.postgresql.Driver"; | |
| 53 if( !Utils.removeRequiredString(spec,"class").equals(cls) ) | |
| 54 throw new LuanException( "parameter 'class' must be '"+cls+"'" ); | |
| 55 Class.forName(cls); | |
| 56 url = Utils.removeRequiredString(spec,"url"); | |
| 57 props.setProperty( "user", Utils.removeRequiredString(spec,"user") ); | |
| 58 props.setProperty( "password", Utils.removeRequiredString(spec,"password") ); | |
| 59 Utils.checkEmpty(spec); | |
| 1387 | 60 |
| 1391 | 61 con = newConnection(); |
| 1387 | 62 |
| 63 Statement stmt = con.createStatement(); | |
| 64 boolean hasTable = stmt.executeQuery( | |
| 65 "select * from information_schema.tables where table_name='lucene'" | |
| 66 ).next(); | |
| 67 if( !hasTable ) { | |
| 68 stmt.executeUpdate( | |
| 69 "create table lucene (" | |
| 70 +" id integer not null primary key," | |
| 71 +" data text not null" | |
| 72 +")" | |
| 73 ); | |
| 74 } | |
| 75 stmt.close(); | |
| 76 wasCreated = !hasTable; | |
| 77 | |
| 78 insertStmt = con.prepareStatement( | |
| 79 "insert into lucene (id,data) values (?,?)" | |
| 80 ); | |
| 81 updateStmt = con.prepareStatement( | |
| 82 "update lucene set data=? where id=?" | |
| 83 ); | |
| 84 deleteStmt = con.prepareStatement( | |
| 85 "delete from lucene where id=?" | |
| 86 ); | |
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87 |
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88 luanToString.strict = true; |
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parents:
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89 luanToString.numberTypes = true; |
| 1391 | 90 } |
| 91 | |
| 92 Connection newConnection() throws SQLException { | |
| 93 return DriverManager.getConnection(url,props); | |
| 1387 | 94 } |
| 95 | |
| 1392 | 96 void close() throws SQLException { |
| 97 insertStmt.close(); | |
| 98 updateStmt.close(); | |
| 99 deleteStmt.close(); | |
| 100 con.close(); | |
| 1387 | 101 } |
| 102 | |
| 103 protected void finalize() throws Throwable { | |
| 1398 | 104 close(); |
| 1387 | 105 super.finalize(); |
| 106 } | |
| 107 | |
| 1392 | 108 void add(LuanTable doc) throws LuanException, SQLException { |
| 109 Long id = (Long)doc.get("id"); | |
| 110 String data = luanToString.toString(doc); | |
| 111 insertStmt.setLong(1,id); | |
| 112 insertStmt.setString(2,data); | |
| 113 insertStmt.executeUpdate(); | |
| 1387 | 114 } |
| 115 | |
| 1392 | 116 void update(LuanTable doc) throws LuanException, SQLException { |
| 117 Long id = (Long)doc.get("id"); | |
| 118 String data = luanToString.toString(doc); | |
| 119 updateStmt.setString(1,data); | |
| 120 updateStmt.setLong(2,id); | |
| 121 int n = updateStmt.executeUpdate(); | |
| 122 if( n==0 ) { | |
| 1393 | 123 luanLogger.error("update not found for id="+id+", trying add"); |
| 1392 | 124 add(doc); |
| 125 } else if( n!=1 ) | |
| 126 throw new RuntimeException(); | |
| 1387 | 127 } |
| 128 | |
| 1392 | 129 void deleteAll() throws SQLException { |
| 130 Statement stmt = con.createStatement(); | |
| 131 stmt.executeUpdate("delete from lucene"); | |
| 132 stmt.close(); | |
| 1387 | 133 } |
| 134 | |
| 1392 | 135 void delete(long id) throws SQLException, LuanException { |
| 136 deleteStmt.setLong(1,id); | |
| 137 int n = deleteStmt.executeUpdate(); | |
| 138 if( n==0 ) | |
| 139 throw new LuanException("delete not found for id="+id); | |
| 1387 | 140 } |
| 141 | |
| 1392 | 142 void begin() throws SQLException { |
| 143 if( trans++ == 0 ) | |
| 144 con.setAutoCommit(false); | |
| 1387 | 145 } |
| 146 | |
| 1392 | 147 void commit() throws SQLException, LuanException { |
| 148 if( trans <= 0 ) | |
| 149 throw new LuanException("commit not in transaction"); | |
| 150 if( --trans == 0 ) | |
| 1387 | 151 con.setAutoCommit(true); |
| 1392 | 152 } |
| 153 | |
| 154 void rollback() throws SQLException, LuanException { | |
| 155 if( --trans != 0 ) | |
| 156 throw new LuanException("rollback failed trans="+trans); | |
| 157 con.rollback(); | |
| 158 con.setAutoCommit(true); | |
| 1387 | 159 } |
| 160 | |
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parents:
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diff
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161 void restoreLucene(LuceneIndex li) |
| 1447 | 162 throws LuanException, IOException, SQLException, ParseException |
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parents:
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diff
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163 { |
| 1447 | 164 Luan luan = new Luan(); |
| 1392 | 165 Statement stmt = con.createStatement(); |
| 166 ResultSet rs = stmt.executeQuery("select data from lucene"); | |
| 167 while( rs.next() ) { | |
| 168 String data = rs.getString("data"); | |
| 1447 | 169 LuanTable doc = (LuanTable)LuanParser.parse(luan,data); |
| 1392 | 170 li.restore(doc); |
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parents:
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diff
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171 } |
| 1392 | 172 stmt.close(); |
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parents:
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173 } |
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parents:
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174 |
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parents:
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175 long maxId() |
| 1392 | 176 throws LuanException, IOException, SQLException |
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parents:
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diff
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177 { |
| 1392 | 178 Statement stmt = con.createStatement(); |
| 179 ResultSet rs = stmt.executeQuery("select max(id) as m from lucene"); | |
| 180 rs.next(); | |
| 181 long m = rs.getLong("m"); | |
| 182 stmt.close(); | |
| 183 return m; | |
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parents:
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184 } |
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parents:
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185 |
| 1391 | 186 final class Checker { |
| 187 private final Connection con; | |
| 188 private final PreparedStatement pstmt; | |
| 1447 | 189 private final Luan luan = new Luan(); |
| 1391 | 190 |
| 191 Checker() throws SQLException { | |
| 192 con = newConnection(); | |
| 1428 | 193 con.setReadOnly(true); |
| 1391 | 194 pstmt = con.prepareStatement( |
| 195 "select data from lucene where id=?" | |
| 196 ); | |
| 197 } | |
| 198 | |
| 199 void close() throws SQLException { | |
| 200 pstmt.close(); | |
| 201 con.close(); | |
| 202 } | |
| 203 | |
| 204 List<Long> getIds() throws SQLException { | |
| 205 List<Long> ids = new ArrayList<Long>(); | |
| 206 Statement stmt = con.createStatement(); | |
| 207 ResultSet rs = stmt.executeQuery("select id from lucene order by id"); | |
| 208 while( rs.next() ) { | |
| 209 long id = rs.getLong("id"); | |
| 210 ids.add(id); | |
| 211 } | |
| 212 stmt.close(); | |
| 213 return ids; | |
| 214 } | |
| 215 | |
| 1447 | 216 LuanTable getDoc(long id) throws SQLException, ParseException { |
| 1391 | 217 pstmt.setLong(1,id); |
| 218 ResultSet rs = pstmt.executeQuery(); | |
| 1399 | 219 if( !rs.next() ) |
| 220 return null; | |
| 1391 | 221 String data = rs.getString("data"); |
| 1447 | 222 LuanTable doc = (LuanTable)LuanParser.parse(luan,data); |
| 1391 | 223 return doc; |
| 224 } | |
| 225 } | |
| 226 | |
| 227 Checker newChecker() throws SQLException { | |
| 228 return new Checker(); | |
| 229 } | |
| 230 | |
| 1387 | 231 } |