Improve final fields naming

src/main/java/wtf/beatrice/hidekobot/Cache.java

@@ -24,7 +24,7 @@ public class Cache
 
 
     // todo: make this compatible with the message listener's regex
-    private static final String botPrefix = "hideko";
+    private static final String BOT_PREFIX = "hideko";
     private static final Logger LOGGER = LoggerFactory.getLogger(Cache.class);
 
     // map to store results of "love calculator", to avoid people re-running the same command until
@@ -38,11 +38,11 @@ public class Cache
     private static DatabaseSource databaseSource = null;
     private static boolean verbose = false;
     private static MessageLogger verbosityLogger = null;
-    private static final long botMaintainerId = 979809420714332260L;
+    private static final long BOT_MAINTAINER_ID = 979809420714332260L;
-    private static final String expiryTimestampFormat = "yy/MM/dd HH:mm:ss";
+    private static final String EXPIRY_TIMESTAMP_FORMAT = "yy/MM/dd HH:mm:ss";
 
     // note: discord sets interactions' expiry time to 15 minutes by default, so we can't go higher than that.
-    private static final long expiryTimeSeconds = 30L;
+    private static final long EXPIRY_TIME_SECONDS = 30L;
 
     // used to count e.g. uptime
     private static LocalDateTime startupTime = null;
@@ -53,14 +53,14 @@ public class Cache
     // the scheduler that should always be used when running a scheduled task.
     private static final ScheduledExecutorService taskScheduler = Executors.newSingleThreadScheduledExecutor(); // todo: try-with-resources
 
-    private static final String execPath = System.getProperty("user.dir");
+    private static final String EXEC_PATH = System.getProperty("user.dir");
-    private static final String botName = "Hideko";
+    private static final String BOT_NAME = "Hideko";
 
     private static SlashCommandListener slashCommandListener = null;
     private static SlashCommandCompletionListener slashCommandCompletionListener = null;
     private static MessageCommandListener messageCommandListener = null;
 
-    private static final String defaultInviteLink =
+    private static final String DEFAULT_INVITE_LINK =
             "https://discord.com/api/oauth2/authorize?client_id=%userid%&scope=bot+applications.commands&permissions=8";
 
     private static String botApplicationId = "";
@@ -137,7 +137,7 @@ public class Cache
      * @return a long of the account's id
      */
     
-    public static long getBotMaintainerId() { return botMaintainerId; }
+    public static long getBotMaintainerId() { return BOT_MAINTAINER_ID; }
 
     /**
      * Set the bot's application id.
@@ -162,7 +162,7 @@ public class Cache
      * @return a string containing the invite link
      */
     public static String getInviteUrl() {
-        return defaultInviteLink.replace("%userid%", botApplicationId);
+        return DEFAULT_INVITE_LINK.replace("%userid%", botApplicationId);
     }
 
     /**
@@ -197,17 +197,17 @@ public class Cache
      *
      * @return the String of the DateTimeFormatter format.
      */
-    public static String getExpiryTimestampFormat(){ return  expiryTimestampFormat; }
+    public static String getExpiryTimestampFormat(){ return EXPIRY_TIMESTAMP_FORMAT; }
 
     /**
      * Get the amount of seconds after which a message expires.
      *
      * @return long value of the expiry seconds.
      */
-    public static long getExpiryTimeSeconds() { return expiryTimeSeconds; }
+    public static long getExpiryTimeSeconds() { return EXPIRY_TIME_SECONDS; }
 
 
-    public static String getBotName() { return botName; }
+    public static String getBotName() { return BOT_NAME; }
 
     /**
      * Get the bot's version.
@@ -294,7 +294,7 @@ public class Cache
         return configurationSource == null ? null : (String) configurationSource.getConfigValue(ConfigurationEntry.HEARTBEAT_LINK);
     }
     //todo javadocs
-    public static String getExecPath() { return execPath; }
+    public static String getExecPath() { return EXEC_PATH; }
 
     /*private static ConfigurationSource getConfigurationSource()
     { return configurationSource; }*/
@@ -311,7 +311,7 @@ public class Cache
      *
      * @return a String of the bot's prefix.
      */
-    public static String getBotPrefix() { return botPrefix; }
+    public static String getBotPrefix() { return BOT_PREFIX; }
 
     public static void cacheLoveCalculatorValue(String userId1, String userId2, int value)
     {

src/main/java/wtf/beatrice/hidekobot/commands/base/Trivia.java

@@ -36,8 +36,8 @@ import java.util.concurrent.TimeUnit;
 public class Trivia
 {
     private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(Trivia.class);
-    private static final String triviaLink = "https://opentdb.com/api.php?amount=10&type=multiple&category=";
+    private static final String TRIVIA_API_LINK = "https://opentdb.com/api.php?amount=10&type=multiple&category=";
-    private static final String categoriesLink = "https://opentdb.com/api_category.php";
+    private static final String TRIVIA_API_CATEGORIES_LINK = "https://opentdb.com/api_category.php";
 
     public static List<String> channelsRunningTrivia = new ArrayList<>();
 
@@ -47,8 +47,8 @@ public class Trivia
     // first string is the channelId, the list contain all score records for that channel
     public static HashMap<String, LinkedList<TriviaScore>> channelAndScores = new HashMap<>();
 
-    public static String getTriviaLink(int categoryId) {return triviaLink + categoryId; }
+    public static String getTriviaLink(int categoryId) {return TRIVIA_API_LINK + categoryId; }
-    public static String getCategoriesLink() {return categoriesLink; }
+    public static String getCategoriesLink() {return TRIVIA_API_CATEGORIES_LINK; }
 
     public static String getNoDMsError() {
         return "\uD83D\uDE22 Sorry! Trivia doesn't work in DMs.";

src/main/java/wtf/beatrice/hidekobot/commands/message/AvatarCommand.java

@@ -6,7 +6,6 @@ import net.dv8tion.jda.api.entities.User;
 import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import wtf.beatrice.hidekobot.Cache;
 import wtf.beatrice.hidekobot.HidekoBot;
 import wtf.beatrice.hidekobot.commands.base.ProfileImage;
 import wtf.beatrice.hidekobot.objects.MessageResponse;
@@ -57,8 +56,6 @@ public class AvatarCommand  implements MessageCommand
     @Override
     public void runCommand(MessageReceivedEvent event, String label, String[] args)
     {
-        int[] acceptedSizes = Cache.getSupportedAvatarResolutions();
-
         User user;
         int resolution = -1;
 

src/main/java/wtf/beatrice/hidekobot/datasources/DatabaseSource.java

@@ -16,7 +16,7 @@ public class DatabaseSource
 {
 
     private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(DatabaseSource.class);
-    private static final String sqliteURL = "jdbc:sqlite:%path%";
+    private static final String JDBC_URL = "jdbc:sqlite:%path%";
     private Connection dbConnection = null;
     private final String dbPath;
 
@@ -32,7 +32,7 @@ public class DatabaseSource
 
     public boolean connect()
     {
-        String url = sqliteURL.replace("%path%", dbPath);
+        String url = JDBC_URL.replace("%path%", dbPath);
 
         if(!close()) return false;
 

src/main/java/wtf/beatrice/hidekobot/listeners/MessageLogger.java

@@ -13,8 +13,8 @@ public class MessageLogger extends ListenerAdapter
 {
     // this class only gets loaded as a listener if verbosity is set to true on startup.
 
-    private static final String guildChannelFormat = "[%guild%] [#%channel%] %user%: %message%";
+    private static final String GUILD_MESSAGE_LOG_FORMAT = "[%guild%] [#%channel%] %user%: %message%";
-    private static final String dmFormat = "[DM] %user%: %message%";
+    private static final String DIRECT_MESSAGE_LOG_FORMAT = "[DM] %user%: %message%";
 
     private static final Logger LOGGER = LoggerFactory.getLogger(MessageLogger.class);
 
@@ -30,13 +30,13 @@ public class MessageLogger extends ListenerAdapter
             String guildName = ((TextChannel) event.getChannel()).getGuild().getName();
             String channelName = event.getChannel().getName();
 
-            toLog = guildChannelFormat
+            toLog = GUILD_MESSAGE_LOG_FORMAT
                     .replace("%guild%", guildName)
                     .replace("%channel%", channelName);
         }
         else if(event.getChannel() instanceof PrivateChannel)
         {
-            toLog = dmFormat;
+            toLog = DIRECT_MESSAGE_LOG_FORMAT;
         }
 
         toLog = toLog