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SQLiteSession.java
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SQLiteSession.java
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package com.bgsoftware.superiorskyblock.database.sql.session;
import com.bgsoftware.superiorskyblock.SuperiorSkyblockPlugin;
import com.bgsoftware.superiorskyblock.api.objects.Pair;
import com.bgsoftware.superiorskyblock.utils.debug.PluginDebugger;
import com.google.common.base.Preconditions;
import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.concurrent.CompletableFuture;
import java.util.function.Function;
public final class SQLiteSession implements SQLSession {
private final CompletableFuture<Void> ready = new CompletableFuture<>();
private final Object mutex = new Object();
private final SuperiorSkyblockPlugin plugin;
@Nullable
private Connection conn;
private boolean logging;
public SQLiteSession(SuperiorSkyblockPlugin plugin, boolean logging) {
this.plugin = plugin;
setLogging(logging);
}
@Override
public void setLogging(boolean logging) {
this.logging = logging;
}
@Override
public boolean createConnection() {
log("Trying to connect to local database (SQLite)...");
File file = new File(plugin.getDataFolder(), "database.db");
if (!file.exists()) {
file.getParentFile().mkdirs();
try {
if (!file.createNewFile()) {
log("&cFailed to create database file.");
return false;
}
} catch (IOException error) {
log("&cAn unexpected error occurred while creating the database file:");
error.printStackTrace();
return false;
}
}
String jdbcUrl = "jdbc:sqlite:" + file.getAbsolutePath().replace("\\", "/");
try {
Class.forName("org.sqlite.JDBC");
conn = DriverManager.getConnection(jdbcUrl);
log("Successfully established connection with local database!");
ready.complete(null);
return true;
} catch (Exception error) {
log("&cFailed to connect to the local database:");
error.printStackTrace();
PluginDebugger.debug(error);
}
return false;
}
@Override
public void closeConnection() {
Preconditions.checkNotNull(this.conn, "Session was not initialized.");
try {
conn.close();
} catch (SQLException error) {
error.printStackTrace();
PluginDebugger.debug(error);
}
}
@Override
public void waitForConnection() {
try {
ready.get();
} catch (Exception ex) {
ex.printStackTrace();
PluginDebugger.debug(ex);
}
}
@Override
public Object getMutex() {
return mutex;
}
@Override
public void setAutoCommit(boolean autoCommit) {
Preconditions.checkNotNull(this.conn, "Session was not initialized.");
try {
this.conn.setAutoCommit(autoCommit);
} catch (SQLException error) {
error.printStackTrace();
PluginDebugger.debug(error);
}
}
@Override
public void commit() {
Preconditions.checkNotNull(this.conn, "Session was not initialized.");
try {
this.conn.commit();
} catch (SQLException error) {
error.printStackTrace();
PluginDebugger.debug(error);
}
}
@Override
public QueryResult<Void> createTable(String tableName, Pair<String, String>... columns) {
StringBuilder columnsSection = new StringBuilder();
for (Pair<String, String> column : columns) {
columnsSection.append(",")
.append(column.getKey())
.append(" ")
.append(column.getValue());
}
return executeUpdate(String.format("CREATE TABLE IF NOT EXISTS %s (%s);",
tableName, columnsSection.substring(1)),
QueryResult.VOID, QueryResult::ofFail);
}
@Override
public QueryResult<Void> renameTable(String tableName, String newName) {
return executeUpdate(String.format("RENAME TABLE %s TO %s;", tableName, newName),
QueryResult.VOID, QueryResult::ofFail);
}
@Override
public QueryResult<Void> createIndex(String indexName, String tableName, String... columns) {
StringBuilder columnsSection = new StringBuilder();
for (String column : columns) {
columnsSection.append(",").append(column);
}
return executeUpdate(String.format("CREATE UNIQUE INDEX %s ON %s (%s);", indexName, tableName,
columnsSection.substring(1)), QueryResult.VOID, QueryResult::ofFail);
}
@Override
public QueryResult<Void> modifyColumnType(String tableName, String columnName, String newType) {
return executeUpdate(String.format("ALTER TABLE %s MODIFY COLUMN %s %s;", tableName,
columnName, newType), QueryResult.VOID, QueryResult::ofFail);
}
@Override
public QueryResult<ResultSet> select(String tableName, String filters) {
return executeQuery(String.format("SELECT * FROM %s%s;", tableName, filters),
QueryResult::ofSuccess, QueryResult::ofFail);
}
@Override
public QueryResult<ResultSet> setJournalMode(String jounralMode) {
return executeQuery(String.format("PRAGMA journal_mode=%s;", jounralMode),
QueryResult::ofSuccess, QueryResult::ofFail);
}
@Override
public QueryResult<PreparedStatement> customQuery(String query) {
Preconditions.checkNotNull(this.conn, "Session was not initialized.");
try {
return QueryResult.ofSuccess(this.conn.prepareStatement(query.replace("{prefix}", "")))
.onFinish(preparedStatement -> {
try {
preparedStatement.close();
} catch (SQLException ignored) {
}
});
} catch (SQLException error) {
return QueryResult.ofFail(error);
}
}
private void log(String message) {
if (logging)
SuperiorSkyblockPlugin.log(message);
}
private <T> T executeUpdate(String statement, T success, Function<SQLException, T> onFailure) {
Preconditions.checkNotNull(this.conn, "Session was not initialized.");
String query = statement
.replace("BIG_DECIMAL", "TEXT")
.replace("UUID", "VARCHAR(36)")
.replace("LONG_UNIQUE_TEXT", "VARCHAR(255)")
.replace("UNIQUE_TEXT", "VARCHAR(30)");
try (PreparedStatement preparedStatement = this.conn.prepareStatement(query)) {
preparedStatement.executeUpdate();
} catch (SQLException error) {
return onFailure.apply(error);
}
return success;
}
private <T> T executeQuery(String statement, Function<ResultSet, T> callback, Function<SQLException, T> onFailure) {
Preconditions.checkNotNull(this.conn, "Session was not initialized.");
String query = statement.replace("{prefix}", "");
try (PreparedStatement preparedStatement = this.conn.prepareStatement(query);
ResultSet resultSet = preparedStatement.executeQuery()) {
return callback.apply(resultSet);
} catch (SQLException error) {
return onFailure.apply(error);
}
}
}