Merge pull request #15 from Trivernis/develop
Fixes and changes to the sql structurepull/23/head v0.13-beta
Trivernis
4 years ago
committed by
GitHub
commit
f1ad4473de
@ -1,79 +0,0 @@
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package net.trivernis.chunkmaster.lib
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import net.trivernis.chunkmaster.Chunkmaster
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import java.lang.Exception
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import java.sql.Connection
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class SqlUpdateManager(private val connnection: Connection, private val chunkmaster: Chunkmaster) {
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private val tables = listOf(
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Pair(
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"generation_tasks",
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listOf(
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Pair("id", "integer PRIMARY KEY AUTOINCREMENT"),
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Pair("center_x", "integer NOT NULL DEFAULT 0"),
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Pair("center_z", "integer NOT NULL DEFAULT 0"),
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Pair("last_x", "integer NOT NULL DEFAULT 0"),
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Pair("last_z", "integer NOT NULL DEFAULT 0"),
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Pair("world", "text UNIQUE NOT NULL DEFAULT 'world'"),
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Pair("stop_after", "integer DEFAULT -1")
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)
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)
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)
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private val needUpdate = HashSet<Pair<String, Pair<String, String>>>()
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private val needCreation = HashSet<String>()
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/**
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* Checks which tables need an update or creation.
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*/
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fun checkUpdate() {
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val meta = connnection.metaData
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for (table in tables) {
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val resTables = meta.getTables(null, null, table.first, null)
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if (resTables.next()) { // table exists
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for (column in table.second) {
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val resColumn = meta.getColumns(null, null, table.first, column.first)
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if (!resColumn.next()) {
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needUpdate.add(Pair(table.first, column))
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}
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}
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} else {
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needCreation.add(table.first)
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}
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}
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}
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/**
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* Creates or updates tables that needed an update.
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*/
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fun performUpdate() {
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for (table in needCreation) {
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try {
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var tableDef = "CREATE TABLE IF NOT EXISTS $table ("
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for (column in tables.find{it.first == table}!!.second) {
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tableDef += "${column.first} ${column.second},"
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}
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tableDef = tableDef.substringBeforeLast(",") + ");"
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chunkmaster.logger.info("Creating table $table with definition $tableDef")
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val stmt = connnection.prepareStatement(tableDef)
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stmt.execute()
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stmt.close()
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} catch (err: Exception) {
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chunkmaster.logger.severe("Error creating table $table.")
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}
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}
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for (table in needUpdate) {
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val updateSql = "ALTER TABLE ${table.first} ADD COLUMN ${table.second.first} ${table.second.second}"
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try {
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val stmt = connnection.prepareStatement(updateSql)
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stmt.execute()
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stmt.close()
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chunkmaster.logger.info("Updated table ${table.first} with sql $updateSql")
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} catch (e: Exception) {
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chunkmaster.logger.severe("Failed to update table ${table.first} with sql $updateSql")
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}
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}
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}
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}
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@ -0,0 +1,137 @@
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package net.trivernis.chunkmaster.lib
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import net.trivernis.chunkmaster.Chunkmaster
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import org.apache.commons.lang.exception.ExceptionUtils
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import org.sqlite.SQLiteConnection
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import java.lang.Exception
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import java.sql.Connection
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import java.sql.DriverManager
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import java.sql.PreparedStatement
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import java.sql.ResultSet
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class SqliteManager(private val chunkmaster: Chunkmaster) {
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private val tables = listOf(
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Pair(
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"generation_tasks",
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listOf(
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Pair("id", "integer PRIMARY KEY AUTOINCREMENT"),
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Pair("center_x", "integer NOT NULL DEFAULT 0"),
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Pair("center_z", "integer NOT NULL DEFAULT 0"),
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Pair("last_x", "integer NOT NULL DEFAULT 0"),
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Pair("last_z", "integer NOT NULL DEFAULT 0"),
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Pair("world", "text UNIQUE NOT NULL DEFAULT 'world'"),
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Pair("stop_after", "integer DEFAULT -1")
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)
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)
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)
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private val needUpdate = HashSet<Pair<String, Pair<String, String>>>()
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private val needCreation = HashSet<String>()
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/**
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* Returns the connection to the database
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*/
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fun getConnection(): Connection? {
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try {
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Class.forName("org.sqlite.JDBC")
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return DriverManager.getConnection("jdbc:sqlite:${chunkmaster.dataFolder.absolutePath}/" +
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"${chunkmaster.config.getString("database.filename")}")
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} catch (e: Exception) {
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chunkmaster.logger.severe("Could not get database connection.")
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chunkmaster.logger.severe(e.message)
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}
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return null
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}
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/**
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* Checks for and performs an update
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*/
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fun init() {
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this.checkUpdate()
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this.performUpdate()
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}
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/**
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* Checks which tables need an update or creation.
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*/
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private fun checkUpdate() {
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val meta = getConnection()!!.metaData
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for (table in tables) {
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val resTables = meta.getTables(null, null, table.first, null)
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if (resTables.next()) { // table exists
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for (column in table.second) {
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val resColumn = meta.getColumns(null, null, table.first, column.first)
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if (!resColumn.next()) {
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needUpdate.add(Pair(table.first, column))
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}
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resColumn.close()
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}
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} else {
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needCreation.add(table.first)
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}
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resTables.close()
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}
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}
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/**
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* Executes a sql statement on the database.
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*/
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fun executeStatement(sql: String, values: HashMap<Int, Any>, callback: ((ResultSet) -> Unit)?) {
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val connection = getConnection()
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if (connection != null) {
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try {
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val statement = connection.prepareStatement(sql)
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for (parameterValue in values) {
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statement.setObject(parameterValue.key, parameterValue.value)
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}
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statement.execute()
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val res = statement.resultSet
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if (callback != null) {
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callback(res)
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}
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statement.close()
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} catch (e: Exception) {
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chunkmaster.logger.severe("An error occured on sql $sql. ${e.message}")
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chunkmaster.logger.info(ExceptionUtils.getStackTrace(e))
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} finally {
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connection.close()
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}
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} else {
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chunkmaster.logger.severe("Could not execute sql $sql. No database connection established.")
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}
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}
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/**
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* Creates or updates tables that needed an update.
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*/
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private fun performUpdate() {
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for (table in needCreation) {
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try {
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var tableDef = "CREATE TABLE IF NOT EXISTS $table ("
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for (column in tables.find{it.first == table}!!.second) {
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tableDef += "${column.first} ${column.second},"
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}
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tableDef = tableDef.substringBeforeLast(",") + ");"
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chunkmaster.logger.info("Creating table $table with definition $tableDef")
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executeStatement(tableDef, HashMap(), null)
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} catch (e: Exception) {
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chunkmaster.logger.severe("Error creating table $table.")
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chunkmaster.logger.severe(e.message)
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chunkmaster.logger.info(ExceptionUtils.getStackTrace(e))
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}
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}
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for (table in needUpdate) {
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val updateSql = "ALTER TABLE ${table.first} ADD COLUMN ${table.second.first} ${table.second.second}"
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try {
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executeStatement(updateSql, HashMap(), null)
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chunkmaster.logger.info("Updated table ${table.first} with sql $updateSql")
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} catch (e: Exception) {
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chunkmaster.logger.severe("Failed to update table ${table.first} with sql $updateSql")
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chunkmaster.logger.severe(e.message)
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chunkmaster.logger.info(ExceptionUtils.getStackTrace(e))
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}
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}
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}
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}
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