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refactor: use try-with-resources for monster information db operations

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This commit is contained in:
P0nk
2021-04-04 22:50:09 +02:00
parent 50b76bf2ec
commit 0b91b02f80
1 changed files with 25 additions and 74 deletions
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97
src/main/java/server/life/MapleMonsterInformationProvider.java
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@@ -22,18 +22,6 @@ package server.life;
import config.YamlConfig; import config.YamlConfig;
import constants.inventory.ItemConstants; import constants.inventory.ItemConstants;
import java.io.File;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import provider.MapleData; import provider.MapleData;
import provider.MapleDataProvider; import provider.MapleDataProvider;
import provider.MapleDataProviderFactory; import provider.MapleDataProviderFactory;
@@ -43,6 +31,13 @@ import tools.DatabaseConnection;
import tools.Pair; import tools.Pair;
import tools.Randomizer; import tools.Randomizer;
import java.io.File;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;
public class MapleMonsterInformationProvider { public class MapleMonsterInformationProvider {
// Author : LightPepsi // Author : LightPepsi
@@ -92,45 +87,20 @@ public class MapleMonsterInformationProvider {
} }
private void retrieveGlobal() { private void retrieveGlobal() {
PreparedStatement ps = null; try (Connection con = DatabaseConnection.getConnection();
ResultSet rs = null; PreparedStatement ps = con.prepareStatement("SELECT * FROM drop_data_global WHERE chance > 0");
Connection con = null; ResultSet rs = ps.executeQuery()) {
try {
con = DatabaseConnection.getConnection();
ps = con.prepareStatement("SELECT * FROM drop_data_global WHERE chance > 0");
rs = ps.executeQuery();
while (rs.next()) { while (rs.next()) {
globaldrops.add( globaldrops.add(new MonsterGlobalDropEntry(
new MonsterGlobalDropEntry( rs.getInt("itemid"),
rs.getInt("itemid"), rs.getInt("chance"),
rs.getInt("chance"), rs.getByte("continent"),
rs.getByte("continent"), rs.getInt("minimum_quantity"),
rs.getInt("minimum_quantity"), rs.getInt("maximum_quantity"),
rs.getInt("maximum_quantity"), rs.getShort("questid")));
rs.getShort("questid")));
} }
rs.close();
ps.close();
con.close();
} catch (SQLException e) { } catch (SQLException e) {
System.err.println("Error retrieving drop" + e); System.err.println("Error retrieving drop" + e);
} finally {
try {
if (ps != null && !ps.isClosed()) {
ps.close();
}
if (rs != null && !rs.isClosed()) {
rs.close();
}
if (con != null && !con.isClosed()) {
con.close();
}
} catch (SQLException ignore) {
ignore.printStackTrace();
}
} }
} }
@@ -183,39 +153,20 @@ public class MapleMonsterInformationProvider {
} }
final List<MonsterDropEntry> ret = new LinkedList<>(); final List<MonsterDropEntry> ret = new LinkedList<>();
PreparedStatement ps = null; try (Connection con = DatabaseConnection.getConnection();
ResultSet rs = null; PreparedStatement ps = con.prepareStatement("SELECT itemid, chance, minimum_quantity, maximum_quantity, questid FROM drop_data WHERE dropperid = ?")) {
Connection con = null;
try {
con = DatabaseConnection.getConnection();
ps = con.prepareStatement("SELECT itemid, chance, minimum_quantity, maximum_quantity, questid FROM drop_data WHERE dropperid = ?");
ps.setInt(1, monsterId); ps.setInt(1, monsterId);
rs = ps.executeQuery();
while (rs.next()) { try (ResultSet rs = ps.executeQuery()) {
ret.add(new MonsterDropEntry(rs.getInt("itemid"), rs.getInt("chance"), rs.getInt("minimum_quantity"), rs.getInt("maximum_quantity"), rs.getShort("questid"))); while (rs.next()) {
ret.add(new MonsterDropEntry(rs.getInt("itemid"), rs.getInt("chance"), rs.getInt("minimum_quantity"), rs.getInt("maximum_quantity"), rs.getShort("questid")));
}
} }
con.close();
} catch (SQLException e) { } catch (SQLException e) {
e.printStackTrace(); e.printStackTrace();
return ret; return ret;
} finally {
try {
if (ps != null && !ps.isClosed()) {
ps.close();
}
if (rs != null && !rs.isClosed()) {
rs.close();
}
if (con != null && !con.isClosed()) {
con.close();
}
} catch (SQLException ignore) {
ignore.printStackTrace();
return ret;
}
} }
drops.put(monsterId, ret); drops.put(monsterId, ret);
return ret; return ret;
} }