Mercurial Hosting > luan
annotate src/luan/modules/lucene/PostgresBackup.java @ 1420:225808b90cee
options handling
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sat, 26 Oct 2019 22:21:09 -0600 |
| parents | 27efb1fcbcb5 |
| children | d21a7cf8fa9e |
| 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; |
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20 import goodjava.logging.Logger; |
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21 import goodjava.logging.LoggerFactory; |
| 1387 | 22 |
| 23 | |
| 24 final class PostgresBackup { | |
| 1393 | 25 private static final Logger sysLogger = LoggerFactory.getLogger(PostgresBackup.class); |
| 26 | |
| 27 private final Logger luanLogger; | |
| 1387 | 28 |
| 29 final boolean wasCreated; | |
| 1391 | 30 private final String url; |
| 31 private final Properties props = new Properties(); | |
| 1387 | 32 private final Connection con; |
| 33 private final PreparedStatement insertStmt; | |
| 34 private final PreparedStatement updateStmt; | |
| 35 private final PreparedStatement deleteStmt; | |
| 36 private int trans = 0; | |
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37 private final LuanToString luanToString = new LuanToString(); |
| 1387 | 38 |
| 1420 | 39 PostgresBackup(Luan luan,LuanTable spec) |
| 1392 | 40 throws ClassNotFoundException, SQLException, LuanException |
| 1387 | 41 { |
| 1420 | 42 spec = new LuanTable(spec); |
| 1393 | 43 this.luanLogger = luan.getLogger(PostgresBackup.class); |
| 1392 | 44 /* |
| 1387 | 45 Class.forName("org.postgresql.Driver"); |
| 1391 | 46 url = "jdbc:postgresql://localhost:5432/luan"; |
| 1387 | 47 props.setProperty("user","postgres"); |
| 48 props.setProperty("password",""); | |
| 1392 | 49 */ |
| 50 String cls = "org.postgresql.Driver"; | |
| 51 if( !Utils.removeRequiredString(spec,"class").equals(cls) ) | |
| 52 throw new LuanException( "parameter 'class' must be '"+cls+"'" ); | |
| 53 Class.forName(cls); | |
| 54 url = Utils.removeRequiredString(spec,"url"); | |
| 55 props.setProperty( "user", Utils.removeRequiredString(spec,"user") ); | |
| 56 props.setProperty( "password", Utils.removeRequiredString(spec,"password") ); | |
| 57 Utils.checkEmpty(spec); | |
| 1387 | 58 |
| 1391 | 59 con = newConnection(); |
| 1387 | 60 |
| 61 Statement stmt = con.createStatement(); | |
| 62 boolean hasTable = stmt.executeQuery( | |
| 63 "select * from information_schema.tables where table_name='lucene'" | |
| 64 ).next(); | |
| 65 if( !hasTable ) { | |
| 66 stmt.executeUpdate( | |
| 67 "create table lucene (" | |
| 68 +" id integer not null primary key," | |
| 69 +" data text not null" | |
| 70 +")" | |
| 71 ); | |
| 72 } | |
| 73 stmt.close(); | |
| 74 wasCreated = !hasTable; | |
| 75 | |
| 76 insertStmt = con.prepareStatement( | |
| 77 "insert into lucene (id,data) values (?,?)" | |
| 78 ); | |
| 79 updateStmt = con.prepareStatement( | |
| 80 "update lucene set data=? where id=?" | |
| 81 ); | |
| 82 deleteStmt = con.prepareStatement( | |
| 83 "delete from lucene where id=?" | |
| 84 ); | |
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85 |
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86 luanToString.strict = true; |
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87 luanToString.numberTypes = true; |
| 1391 | 88 } |
| 89 | |
| 90 Connection newConnection() throws SQLException { | |
| 91 return DriverManager.getConnection(url,props); | |
| 1387 | 92 } |
| 93 | |
| 1392 | 94 void close() throws SQLException { |
| 95 insertStmt.close(); | |
| 96 updateStmt.close(); | |
| 97 deleteStmt.close(); | |
| 98 con.close(); | |
| 1387 | 99 } |
| 100 | |
| 101 protected void finalize() throws Throwable { | |
| 1398 | 102 close(); |
| 1387 | 103 super.finalize(); |
| 104 } | |
| 105 | |
| 1392 | 106 void add(LuanTable doc) throws LuanException, SQLException { |
| 107 Long id = (Long)doc.get("id"); | |
| 108 String data = luanToString.toString(doc); | |
| 109 insertStmt.setLong(1,id); | |
| 110 insertStmt.setString(2,data); | |
| 111 insertStmt.executeUpdate(); | |
| 1387 | 112 } |
| 113 | |
| 1392 | 114 void update(LuanTable doc) throws LuanException, SQLException { |
| 115 Long id = (Long)doc.get("id"); | |
| 116 String data = luanToString.toString(doc); | |
| 117 updateStmt.setString(1,data); | |
| 118 updateStmt.setLong(2,id); | |
| 119 int n = updateStmt.executeUpdate(); | |
| 120 if( n==0 ) { | |
| 1393 | 121 luanLogger.error("update not found for id="+id+", trying add"); |
| 1392 | 122 add(doc); |
| 123 } else if( n!=1 ) | |
| 124 throw new RuntimeException(); | |
| 1387 | 125 } |
| 126 | |
| 1392 | 127 void deleteAll() throws SQLException { |
| 128 Statement stmt = con.createStatement(); | |
| 129 stmt.executeUpdate("delete from lucene"); | |
| 130 stmt.close(); | |
| 1387 | 131 } |
| 132 | |
| 1392 | 133 void delete(long id) throws SQLException, LuanException { |
| 134 deleteStmt.setLong(1,id); | |
| 135 int n = deleteStmt.executeUpdate(); | |
| 136 if( n==0 ) | |
| 137 throw new LuanException("delete not found for id="+id); | |
| 1387 | 138 } |
| 139 | |
| 1392 | 140 void begin() throws SQLException { |
| 141 if( trans++ == 0 ) | |
| 142 con.setAutoCommit(false); | |
| 1387 | 143 } |
| 144 | |
| 1392 | 145 void commit() throws SQLException, LuanException { |
| 146 if( trans <= 0 ) | |
| 147 throw new LuanException("commit not in transaction"); | |
| 148 if( --trans == 0 ) | |
| 1387 | 149 con.setAutoCommit(true); |
| 1392 | 150 } |
| 151 | |
| 152 void rollback() throws SQLException, LuanException { | |
| 153 if( --trans != 0 ) | |
| 154 throw new LuanException("rollback failed trans="+trans); | |
| 155 con.rollback(); | |
| 156 con.setAutoCommit(true); | |
| 1387 | 157 } |
| 158 | |
| 1391 | 159 private static LuanTable newEnv() { |
| 160 LuanTable env = new LuanTable(new Luan()); | |
| 161 LuanToString.addNumberTypes(env); | |
| 162 return env; | |
| 163 } | |
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164 |
| 1391 | 165 private static Object eval(String s,LuanTable env) throws LuanException { |
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166 LuanFunction fn = env.luan().load( "return "+s, "PostgresBackup", env ); |
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167 return fn.call(); |
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parents:
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168 } |
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169 |
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170 void restoreLucene(LuceneIndex li) |
| 1392 | 171 throws LuanException, IOException, SQLException |
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172 { |
| 1392 | 173 LuanTable env = newEnv(); |
| 174 Statement stmt = con.createStatement(); | |
| 175 ResultSet rs = stmt.executeQuery("select data from lucene"); | |
| 176 while( rs.next() ) { | |
| 177 String data = rs.getString("data"); | |
| 178 LuanTable doc = (LuanTable)eval(data,env); | |
| 179 li.restore(doc); | |
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parents:
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180 } |
| 1392 | 181 stmt.close(); |
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182 } |
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183 |
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184 long maxId() |
| 1392 | 185 throws LuanException, IOException, SQLException |
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186 { |
| 1392 | 187 Statement stmt = con.createStatement(); |
| 188 ResultSet rs = stmt.executeQuery("select max(id) as m from lucene"); | |
| 189 rs.next(); | |
| 190 long m = rs.getLong("m"); | |
| 191 stmt.close(); | |
| 192 return m; | |
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193 } |
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194 |
| 1391 | 195 final class Checker { |
| 196 private final Connection con; | |
| 197 private final PreparedStatement pstmt; | |
| 198 private final LuanTable env = newEnv(); | |
| 199 | |
| 200 Checker() throws SQLException { | |
| 201 con = newConnection(); | |
| 202 con.setAutoCommit(false); | |
| 203 pstmt = con.prepareStatement( | |
| 204 "select data from lucene where id=?" | |
| 205 ); | |
| 206 } | |
| 207 | |
| 208 void close() throws SQLException { | |
| 209 pstmt.close(); | |
| 210 con.close(); | |
| 211 } | |
| 212 | |
| 213 List<Long> getIds() throws SQLException { | |
| 214 List<Long> ids = new ArrayList<Long>(); | |
| 215 Statement stmt = con.createStatement(); | |
| 216 ResultSet rs = stmt.executeQuery("select id from lucene order by id"); | |
| 217 while( rs.next() ) { | |
| 218 long id = rs.getLong("id"); | |
| 219 ids.add(id); | |
| 220 } | |
| 221 stmt.close(); | |
| 222 return ids; | |
| 223 } | |
| 224 | |
| 225 LuanTable getDoc(long id) throws SQLException, LuanException { | |
| 226 pstmt.setLong(1,id); | |
| 227 ResultSet rs = pstmt.executeQuery(); | |
| 1399 | 228 if( !rs.next() ) |
| 229 return null; | |
| 1391 | 230 String data = rs.getString("data"); |
| 231 LuanTable doc = (LuanTable)eval(data,env); | |
| 232 return doc; | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 Checker newChecker() throws SQLException { | |
| 237 return new Checker(); | |
| 238 } | |
| 239 | |
| 1387 | 240 } |