forked from External/mage
bf3f26ccc1
- fixed broken database in some use cases (example: AI and choose name dialog, related to #11285); - added docs and debug tools for sql queries, caches and memory analyse (see DebugUtil); - refactor code to use shared settings; - deleted outdated and un-used code (db logs, stats, etc);
69 lines
2.6 KiB
Java
69 lines
2.6 KiB
Java
package mage.cards.repository;
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import mage.util.DebugUtil;
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/**
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* Helper class for database
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*
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* @author JayDi85
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*/
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public class DatabaseUtils {
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// warning, do not change names or db format
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// h2
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public static final String DB_NAME_FEEDBACK = "feedback.h2";
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public static final String DB_NAME_USERS = "authorized_user.h2";
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public static final String DB_NAME_CARDS = "cards.h2";
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// sqlite (usage reason: h2 database works bad with 1GB+ files and can break it)
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public static final String DB_NAME_RECORDS = "table_record.db";
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public static final String DB_NAME_STATS = "user_stats.db";
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/**
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* Prepare JDBC connection string and setup additional params for H2 databases
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*
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* @param dbName database name like "cards.h2"
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* @param improveCaches use memory optimizations for cards database (no needs for other dbs)
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*/
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public static String prepareH2Connection(String dbName, boolean improveCaches) {
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// example: jdbc:h2:file:./db/cards.h2;AUTO_SERVER=TRUE;IGNORECASE=TRUE
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String res = String.format("jdbc:h2:file:./db/%s", dbName);
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// shared params
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res += ";AUTO_SERVER=TRUE"; // open database in mix mode (first open by new thread, second open by new jvm-process)
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res += ";IGNORECASE=TRUE"; // ignore char case for text searching
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// additional params
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// can be defined by connection string, by exec sql like "SET xxx = yyy", by settings from existing db-file
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if (improveCaches) {
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// CACHE_SIZE
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// max query cache size in kb (default: 65 Mb per 1 GB of java's max memory)
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// warning, xmage require 150Mb cache for big queries in AI games like all card names (db can be broken on lower cache)
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//res += ";CACHE_SIZE=150000";
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res += ";CACHE_SIZE=" + Math.round(Math.max(150000, Runtime.getRuntime().maxMemory() * 0.1 / 1024));
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// QUERY_CACHE_SIZE
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// queries amount per session to cache (default: 8)
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res += ";QUERY_CACHE_SIZE=32";
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}
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// add debug stats (see DebugUtil for usage instruction)
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if (DebugUtil.DATABASE_PROFILE_SQL_QUERIES_TO_FILE) {
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res += ";TRACE_LEVEL_FILE=2";
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res += ";QUERY_STATISTICS=TRUE";
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}
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return res;
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}
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/**
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* Prepare JDBC connection string and setup additional params for SQLite databases
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*
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* @param dbName database name like "cards"
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*/
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public static String prepareSqliteConnection(String dbName) {
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// example: jdbc:sqlite:./db/table_record.db
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return String.format("jdbc:sqlite:./db/%s", dbName);
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}
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}
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