Implemented economy log cleanup (#156)

src/main/java/de/epiceric/shopchest/config/Config.java

@@ -170,6 +170,13 @@ public class Config {
      **/
     public static boolean enableWorldGuardIntegration;
 
+    /**
+     * <p>Sets the time limit for cleaning up the economy log in days</p>
+     * 
+     * If this equals to {@code 0}, the economy log will not be cleaned.
+     **/
+    public static int cleanupEconomyLogDays;
+
     /**
      * Whether Towny integration should be enabled
      **/
@@ -478,6 +485,7 @@ public class Config {
         enableHologramInteraction = plugin.getConfig().getBoolean("enable-hologram-interaction");
         enableDebugLog = plugin.getConfig().getBoolean("enable-debug-log");
         enableEcomomyLog = plugin.getConfig().getBoolean("enable-economy-log");
+        cleanupEconomyLogDays = plugin.getConfig().getInt("cleanup-ecomomy-log-days");
         enableWorldGuardIntegration = plugin.getConfig().getBoolean("enable-worldguard-integration");
         enableTownyIntegration = plugin.getConfig().getBoolean("enable-towny-integration");
         enableAuthMeIntegration = plugin.getConfig().getBoolean("enable-authme-integration");

src/main/java/de/epiceric/shopchest/sql/Database.java

@@ -155,6 +155,11 @@ public abstract class Database {
                     s4.executeUpdate(queryCreateTablePlayerLogout);
                     s4.close();
 
+                    // Clean up economy log
+                    if (Config.cleanupEconomyLogDays > 0) {
+                        cleanUpEconomy(false);
+                    }
+
                     // Count entries in table "shops"
                     PreparedStatement ps = connection.prepareStatement("SELECT * FROM shops");
                     ResultSet rs2 = ps.executeQuery();
@@ -424,6 +429,52 @@ public abstract class Database {
         }
     }
 
+    /**
+     * Cleans up the economy log to reduce file size
+     * @param async Whether the call should be executed asynchronously
+     */
+    public void cleanUpEconomy(boolean async) {
+        BukkitRunnable runnable = new BukkitRunnable() {
+            @Override
+            public void run() {
+                Statement s = null;
+                Statement s2 = null;
+
+                Calendar cal = Calendar.getInstance();
+                long time = System.currentTimeMillis();
+                cal.add(Calendar.DATE, -Config.cleanupEconomyLogDays);
+                time -= Config.cleanupEconomyLogDays * 86400000L;
+                String logPurgeLimit = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(cal.getTime());
+                String queryCleanUpLog = "DELETE FROM shop_log WHERE timestamp < '" + logPurgeLimit + "'";
+                String queryCleanUpPlayers = "DELETE FROM player_logout WHERE time < " + String.valueOf(time);
+
+                try {
+                    s = connection.createStatement();
+                    s.executeUpdate(queryCleanUpLog);
+
+                    s2 = connection.createStatement();
+                    s2.executeUpdate(queryCleanUpPlayers);
+
+                    plugin.getLogger().info("Cleaned up economy log");
+                    plugin.debug("Cleaned up economy log");
+                } catch (final SQLException ex) {
+                    plugin.getLogger().severe("Failed to clean up economy log");
+                    plugin.debug("Failed to clean up economy log");
+                    plugin.debug(ex);
+                } finally {
+                    close(s, null);
+                    close(s2, null);
+                }
+            }
+        };
+
+        if (async) {
+            runnable.runTaskAsynchronously(plugin);
+        } else {
+            runnable.run();
+        }
+    }
+
     /**
      * Get the revenue a player got while he was offline
      * @param player Player whose revenue to get

src/main/resources/config.yml

@@ -40,6 +40,11 @@ enable-hologram-interaction: true
 # Set whether buys and sells should be logged in the database.
 enable-economy-log: false
 
+# Sets the time limit for cleaning up the economy log in days.
+# All log entries older than this will be deleted on server start.
+# Set this to 0 in order to disable this feature.
+cleanup-ecomomy-log-days: 30
+
 # Set whether a debug log file should be created.
 # The file may get large! Please enable this setting when reporting bugs.
 enable-debug-log: false