Mercurial Hosting > luan
annotate src/luan/modules/lucene/PostgresBackup.java @ 1393:cc0dbca576dc
better logging
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Fri, 06 Sep 2019 05:09:56 -0600 |
| parents | 002152af497a |
| children | 67c0e47b5be3 |
| 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; |
| 20 import luan.lib.logging.Logger; | |
| 21 import luan.lib.logging.LoggerFactory; | |
| 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 |
| 1393 | 39 PostgresBackup(Luan luan,Map spec) |
| 1392 | 40 throws ClassNotFoundException, SQLException, LuanException |
| 1387 | 41 { |
| 1393 | 42 this.luanLogger = luan.getLogger(PostgresBackup.class); |
| 1392 | 43 /* |
| 1387 | 44 Class.forName("org.postgresql.Driver"); |
| 1391 | 45 url = "jdbc:postgresql://localhost:5432/luan"; |
| 1387 | 46 props.setProperty("user","postgres"); |
| 47 props.setProperty("password",""); | |
| 1392 | 48 */ |
| 49 String cls = "org.postgresql.Driver"; | |
| 50 if( !Utils.removeRequiredString(spec,"class").equals(cls) ) | |
| 51 throw new LuanException( "parameter 'class' must be '"+cls+"'" ); | |
| 52 Class.forName(cls); | |
| 53 url = Utils.removeRequiredString(spec,"url"); | |
| 54 props.setProperty( "user", Utils.removeRequiredString(spec,"user") ); | |
| 55 props.setProperty( "password", Utils.removeRequiredString(spec,"password") ); | |
| 56 Utils.checkEmpty(spec); | |
| 1387 | 57 |
| 1391 | 58 con = newConnection(); |
| 1387 | 59 |
| 60 Statement stmt = con.createStatement(); | |
| 61 boolean hasTable = stmt.executeQuery( | |
| 62 "select * from information_schema.tables where table_name='lucene'" | |
| 63 ).next(); | |
| 64 if( !hasTable ) { | |
| 65 stmt.executeUpdate( | |
| 66 "create table lucene (" | |
| 67 +" id integer not null primary key," | |
| 68 +" data text not null" | |
| 69 +")" | |
| 70 ); | |
| 71 } | |
| 72 stmt.close(); | |
| 73 wasCreated = !hasTable; | |
| 74 | |
| 75 insertStmt = con.prepareStatement( | |
| 76 "insert into lucene (id,data) values (?,?)" | |
| 77 ); | |
| 78 updateStmt = con.prepareStatement( | |
| 79 "update lucene set data=? where id=?" | |
| 80 ); | |
| 81 deleteStmt = con.prepareStatement( | |
| 82 "delete from lucene where id=?" | |
| 83 ); | |
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parents:
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84 |
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parents:
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85 luanToString.strict = true; |
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parents:
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diff
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86 luanToString.numberTypes = true; |
| 1391 | 87 } |
| 88 | |
| 89 Connection newConnection() throws SQLException { | |
| 90 return DriverManager.getConnection(url,props); | |
| 1387 | 91 } |
| 92 | |
| 1392 | 93 void close() throws SQLException { |
| 94 insertStmt.close(); | |
| 95 updateStmt.close(); | |
| 96 deleteStmt.close(); | |
| 97 con.close(); | |
| 1387 | 98 } |
| 99 | |
| 100 protected void finalize() throws Throwable { | |
| 101 super.finalize(); | |
| 102 if( !con.isClosed() ) { | |
| 1393 | 103 sysLogger.error("con not closed"); |
| 1387 | 104 con.close(); |
| 105 } | |
| 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 | |
| 1391 | 161 private static LuanTable newEnv() { |
| 162 LuanTable env = new LuanTable(new Luan()); | |
| 163 LuanToString.addNumberTypes(env); | |
| 164 return env; | |
| 165 } | |
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parents:
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diff
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166 |
| 1391 | 167 private static Object eval(String s,LuanTable env) throws LuanException { |
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parents:
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diff
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168 LuanFunction fn = env.luan().load( "return "+s, "PostgresBackup", env ); |
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parents:
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169 return fn.call(); |
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parents:
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diff
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170 } |
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
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171 |
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parents:
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diff
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172 void restoreLucene(LuceneIndex li) |
| 1392 | 173 throws LuanException, IOException, SQLException |
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parents:
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diff
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174 { |
| 1392 | 175 LuanTable env = newEnv(); |
| 176 Statement stmt = con.createStatement(); | |
| 177 ResultSet rs = stmt.executeQuery("select data from lucene"); | |
| 178 while( rs.next() ) { | |
| 179 String data = rs.getString("data"); | |
| 180 LuanTable doc = (LuanTable)eval(data,env); | |
| 181 li.restore(doc); | |
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parents:
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diff
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182 } |
| 1392 | 183 stmt.close(); |
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parents:
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diff
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184 } |
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parents:
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diff
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185 |
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parents:
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186 long maxId() |
| 1392 | 187 throws LuanException, IOException, SQLException |
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parents:
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188 { |
| 1392 | 189 Statement stmt = con.createStatement(); |
| 190 ResultSet rs = stmt.executeQuery("select max(id) as m from lucene"); | |
| 191 rs.next(); | |
| 192 long m = rs.getLong("m"); | |
| 193 stmt.close(); | |
| 194 return m; | |
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parents:
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195 } |
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parents:
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diff
changeset
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196 |
| 1391 | 197 final class Checker { |
| 198 private final Connection con; | |
| 199 private final PreparedStatement pstmt; | |
| 200 private final LuanTable env = newEnv(); | |
| 201 | |
| 202 Checker() throws SQLException { | |
| 203 con = newConnection(); | |
| 204 con.setAutoCommit(false); | |
| 205 pstmt = con.prepareStatement( | |
| 206 "select data from lucene where id=?" | |
| 207 ); | |
| 208 } | |
| 209 | |
| 210 void close() throws SQLException { | |
| 211 pstmt.close(); | |
| 212 con.close(); | |
| 213 } | |
| 214 | |
| 215 List<Long> getIds() throws SQLException { | |
| 216 List<Long> ids = new ArrayList<Long>(); | |
| 217 Statement stmt = con.createStatement(); | |
| 218 ResultSet rs = stmt.executeQuery("select id from lucene order by id"); | |
| 219 while( rs.next() ) { | |
| 220 long id = rs.getLong("id"); | |
| 221 ids.add(id); | |
| 222 } | |
| 223 stmt.close(); | |
| 224 return ids; | |
| 225 } | |
| 226 | |
| 227 LuanTable getDoc(long id) throws SQLException, LuanException { | |
| 228 pstmt.setLong(1,id); | |
| 229 ResultSet rs = pstmt.executeQuery(); | |
| 230 rs.next(); | |
| 231 String data = rs.getString("data"); | |
| 232 LuanTable doc = (LuanTable)eval(data,env); | |
| 233 return doc; | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 Checker newChecker() throws SQLException { | |
| 238 return new Checker(); | |
| 239 } | |
| 240 | |
| 1387 | 241 } |