Mercurial Hosting > luan
annotate src/luan/modules/sql/Database.java @ 1268:725e52076f03
remove broken pooling
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Mon, 12 Nov 2018 03:54:04 -0700 |
| parents | 9fa8b8389578 |
| children | 25746915a241 |
| rev | line source |
|---|---|
| 1267 | 1 package luan.modules.sql; |
| 2 | |
| 3 import java.sql.Connection; | |
| 4 import java.sql.DriverManager; | |
| 5 import java.sql.Statement; | |
| 6 import java.sql.PreparedStatement; | |
| 7 import java.sql.ResultSet; | |
| 8 import java.sql.SQLException; | |
| 9 import java.util.Map; | |
| 10 import java.util.HashMap; | |
| 11 import java.util.Properties; | |
| 12 import org.slf4j.Logger; | |
| 13 import org.slf4j.LoggerFactory; | |
| 14 import luan.LuanState; | |
| 15 import luan.LuanTable; | |
| 16 import luan.LuanException; | |
| 17 | |
| 18 | |
|
1268
725e52076f03
remove broken pooling
Franklin Schmidt <fschmidt@gmail.com>
parents:
1267
diff
changeset
|
19 public final class Database { |
| 1267 | 20 private static final Logger logger = LoggerFactory.getLogger(Database.class); |
| 21 | |
| 22 public final Connection con; | |
| 23 private final Map<String,PreparedStatement> pstmts = new HashMap<String,PreparedStatement>(); | |
| 24 | |
| 25 public Database(Connection con) { | |
| 26 this.con = con; | |
| 27 } | |
| 28 | |
|
1268
725e52076f03
remove broken pooling
Franklin Schmidt <fschmidt@gmail.com>
parents:
1267
diff
changeset
|
29 public Database(LuanTable specTbl) |
| 1267 | 30 throws LuanException, ClassNotFoundException, SQLException |
| 31 { | |
|
1268
725e52076f03
remove broken pooling
Franklin Schmidt <fschmidt@gmail.com>
parents:
1267
diff
changeset
|
32 Map<Object,Object> spec = specTbl.asMap(); |
| 1267 | 33 String cls = getString(spec,"class"); |
| 34 Class.forName(cls); | |
| 35 String url = getString(spec,"url"); | |
| 36 Properties props = new Properties(); | |
| 37 props.putAll(spec); | |
| 38 this.con = DriverManager.getConnection(url,props); | |
| 39 } | |
| 40 | |
| 41 private static String getString(Map spec,String key) throws LuanException { | |
| 42 Object val = spec.remove(key); | |
| 43 if( val==null ) | |
| 44 throw new LuanException( "parameter '"+key+"' is required" ); | |
| 45 if( !(val instanceof String) ) | |
| 46 throw new LuanException( "parameter '"+key+"' must be a string" ); | |
| 47 return (String)val; | |
| 48 } | |
| 49 | |
| 50 private PreparedStatement prepareStatement(String sql,Object[] args) throws SQLException { | |
| 51 PreparedStatement pstmt = pstmts.get(sql); | |
| 52 if( pstmt==null ) { | |
| 53 pstmt = con.prepareStatement(sql); | |
| 54 pstmts.put(sql,pstmt); | |
| 55 } | |
| 56 for( int i=0; i<args.length; i++ ) { | |
| 57 pstmt.setObject(i+1,args[i]); | |
| 58 } | |
| 59 return pstmt; | |
| 60 } | |
| 61 | |
| 62 public ResultSet query(String sql,Object... args) throws SQLException { | |
| 63 if( args.length == 0 ) { | |
| 64 Statement stmt = con.createStatement(); | |
| 65 return stmt.executeQuery(sql); | |
| 66 } else { | |
| 67 PreparedStatement pstmt = prepareStatement(sql,args); | |
| 68 return pstmt.executeQuery(); | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 public int update(String sql,Object... args) throws SQLException { | |
| 73 if( args.length == 0 ) { | |
| 74 Statement stmt = con.createStatement(); | |
| 75 int n = stmt.executeUpdate(sql); | |
| 76 stmt.close(); | |
| 77 return n; | |
| 78 } else { | |
| 79 PreparedStatement pstmt = prepareStatement(sql,args); | |
| 80 return pstmt.executeUpdate(); | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 } |