Improved Config machanism with ConfigItems

Added logger levels and home directory to Config

src/main/java/envoy/client/Config.java

@@ -1,7 +1,10 @@
 package envoy.client;
 
 import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Properties;
+import java.util.logging.Level;
 
 import envoy.exception.EnvoyException;
 
@@ -20,14 +23,19 @@ import envoy.exception.EnvoyException;
  */
 public class Config {
 
-	private String	server;
-	private int		port;
-	private File	localDB;
-	private int		syncTimeout;
+	private Map<String, ConfigItem<?>> items = new HashMap<>();
 
 	private static Config config;
 
-	private Config() {}
+	private Config() {
+		items.put("server", new ConfigItem<>("server", "s", (input) -> input, null));
+		items.put("port", new ConfigItem<>("port", "p", (input) -> Integer.parseInt(input), null));
+		items.put("localDB", new ConfigItem<>("localDB", "db", (input) -> new File(input), new File("localDB")));
+		items.put("syncTimeout", new ConfigItem<>("syncTimeout", "st", (input) -> Integer.parseInt(input), 1000));
+		items.put("homeDirectory", new ConfigItem<>("homeDirectory", "h", (input) -> new File(input), new File(System.getProperty("user.home"))));
+		items.put("fileLevelBarrier", new ConfigItem<>("fileLevelBarrier", "fb", (input) -> Level.parse(input), Level.CONFIG));
+		items.put("consoleLevelBarrier", new ConfigItem<>("consoleLevelBarrier", "cb", (input) -> Level.parse(input), Level.FINEST));
+	}
 
 	/**
 	 * @return the singleton instance of the {@link Config}
@@ -53,10 +61,7 @@ public class Config {
 		try {
 			Properties properties = new Properties();
 			properties.load(loader.getResourceAsStream("client.properties"));
-			if (properties.containsKey("server")) server = properties.getProperty("server");
-			if (properties.containsKey("port")) port = Integer.parseInt(properties.getProperty("port"));
-			localDB		= new File(properties.getProperty("localDB", ".\\localDB"));
-			syncTimeout	= Integer.parseInt(properties.getProperty("syncTimeout", "1000"));
+			items.forEach((name, item) -> { if (properties.containsKey(name)) item.parse(properties.getProperty(name)); });
 		} catch (Exception e) {
 			throw new EnvoyException("Failed to load client.properties", e);
 		}
@@ -72,84 +77,57 @@ public class Config {
 	 */
 	public void load(String[] args) throws EnvoyException {
 		for (int i = 0; i < args.length; i++)
-			switch (args[i]) {
-				case "--server":
-				case "-s":
-					server = args[++i];
-					break;
-				case "--port":
-				case "-p":
-					port = Integer.parseInt(args[++i]);
-					break;
-				case "--localDB":
-				case "-db":
-					localDB = new File(args[++i]);
-					break;
-				default:
-					throw new EnvoyException("Unknown token " + args[i] + " found");
-			}
+			for (ConfigItem<?> item : items.values())
+				if (args[i].startsWith("--")) {
+					if (args[i].length() == 2) throw new EnvoyException("Malformed command line argument at position " + i);
+					final String commandLong = args[i].substring(2);
+					if (item.getCommandLong().equals(commandLong)) {
+						item.parse(args[++i]);
+						break;
+					}
+				} else if (args[i].startsWith("-")) {
+					if (args[i].length() == 1) throw new EnvoyException("Malformed command line argument at position " + i);
+					final String commandShort = args[i].substring(1);
+					if (item.getCommandShort().equals(commandShort)) {
+						item.parse(args[++i]);
+						break;
+					}
+				} else throw new EnvoyException("Malformed command line argument at position " + i);
 	}
 
 	/**
 	 * @return {@code true} if server, port and localDB directory are known.
 	 * @since Envoy v0.1-alpha
 	 */
-	public boolean isInitialized() { return server != null && !server.isEmpty() && port > 0 && port < 65566 && localDB != null; }
+	public boolean isInitialized() { return items.values().stream().noneMatch(item -> item.get() == null); }
 
 	/**
 	 * @return the host name of the Envoy server
 	 * @since Envoy v0.1-alpha
 	 */
-	public String getServer() { return server; }
-
-	/**
-	 * Changes the default server host name.
-	 * Exclusively intended for development purposes.
-	 *
-	 * @param server the host name of the Envoy server
-	 * @since Envoy v0.1-alpha
-	 */
-	public void setServer(String server) { this.server = server; }
+	public String getServer() { return (String) items.get("server").get(); }
 
 	/**
 	 * @return the port at which the Envoy server is located on the host
 	 * @since Envoy v0.1-alpha
 	 */
-	public int getPort() { return port; }
-
-	/**
-	 * Changes the default port.
-	 * Exclusively intended for development purposes.
-	 *
-	 * @param port the port where an Envoy server is located
-	 * @since Envoy v0.1-alpha
-	 */
-	public void setPort(int port) { this.port = port; }
+	public int getPort() { return (int) items.get("port").get(); }
 
 	/**
 	 * @return the local database specific to the client user
 	 * @since Envoy v0.1-alpha
 	 **/
-	public File getLocalDB() { return localDB; }
-
-	/**
-	 * Changes the default local database.
-	 * Exclusively intended for development purposes.
-	 *
-	 * @param localDB the file containing the local database
-	 * @since Envoy v0.1-alpha
-	 **/
-	public void setLocalDB(File localDB) { this.localDB = localDB; }
+	public File getLocalDB() { return (File) items.get("localDB").get(); }
 
 	/**
 	 * @return the current time (milliseconds) that is waited between Syncs
 	 * @since Envoy v0.1-alpha
 	 */
-	public int getSyncTimeout() { return syncTimeout; }
+	public int getSyncTimeout() { return (int) items.get("syncTimeout").get(); }
 
-	/**
-	 * @param syncTimeout sets the time (milliseconds) during which Sync waits
-	 * @since Envoy v0.1-alpha
-	 */
-	public void setSyncTimeout(int syncTimeout) { this.syncTimeout = syncTimeout; }
+	public File getHomeDirectory() { return (File) items.get("homeDirectory").get(); }
+	
+	public Level getFileLevelBarrier() { return (Level) items.get("fileLevelBarrier").get(); }
+	
+	public Level getConsoleLevelBarrier() { return (Level) items.get("consoleLevelBarrier").get(); }
 }

src/main/java/envoy/client/ConfigItem.java

@@ -0,0 +1,32 @@
+package envoy.client;
+
+import java.util.function.Function;
+
+/**
+ * Project: <strong>envoy-clientChess</strong><br>
+ * File: <strong>ConfigItem.javaEvent.java</strong><br>
+ * Created: <strong>21.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ */
+public class ConfigItem<T> {
+
+	private String				commandLong, commandShort;
+	private Function<String, T>	parseFunction;
+	private T					value;
+
+	public ConfigItem(String commandLong, String commandShort, Function<String, T> parseFunction, T defaultValue) {
+		this.commandLong	= commandLong;
+		this.commandShort	= commandShort;
+		this.parseFunction	= parseFunction;
+		value				= defaultValue;
+	}
+
+	public void parse(String input) { value = parseFunction.apply(input); }
+
+	public String getCommandLong() { return commandLong; }
+
+	public String getCommandShort() { return commandShort; }
+
+	public T get() { return value; }
+}

src/main/java/envoy/client/ui/Startup.java

@@ -61,6 +61,9 @@ public class Startup {
 			System.exit(1);
 			e.printStackTrace();
 		}
+		
+		EnvoyLog.setFileLevelBarrier(Config.getInstance().getFileLevelBarrier());
+		EnvoyLog.setConsoleLevelBarrier(Config.getInstance().getConsoleLevelBarrier());
 
 		// Ask the user for their user name
 		String userName = JOptionPane.showInputDialog("Please enter your username");

src/main/java/envoy/client/util/EnvoyLog.java

@@ -2,11 +2,9 @@ package envoy.client.util;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.logging.ConsoleHandler;
-import java.util.logging.FileHandler;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-import java.util.logging.SimpleFormatter;
+import java.util.logging.*;
+
+import envoy.client.Config;
 
 /**
  * Project: <strong>envoy-client</strong><br>
@@ -14,28 +12,30 @@ import java.util.logging.SimpleFormatter;
  * Created: <strong>14 Dec 2019</strong><br>
  * 
  * @author Leon Hofmeister
+ * @author Kai S. K. Engelbart
  * @since Envoy v0.2-alpha
  */
 public class EnvoyLog {
 
-	private static Level fileLevelBarrier = Level.CONFIG;
+	private static Level fileLevelBarrier = Config.getInstance().getFileLevelBarrier(), consoleLevelBarrier = Config.getInstance().getConsoleLevelBarrier();
 
 	private EnvoyLog() {}
 
 	/**
 	 * Creates a {@link Logger} with a specified name
+	 * 
 	 * @param name the name of the {@link Logger} to create
 	 * @return the created {@link Logger}
 	 */
 	public static Logger getLogger(String name) {
 		// Get a logger with the specified name
 		Logger logger = Logger.getLogger(name);
-		
+
 		final String logPath = "log/envoy_user.log";
 		new File(logPath).getParentFile().mkdirs();
-		
-		SimpleFormatter	formatter	= new SimpleFormatter();
-		
+
+		SimpleFormatter formatter = new SimpleFormatter();
+
 		try {
 			FileHandler fh = new FileHandler(logPath);
 			fh.setLevel(fileLevelBarrier);
@@ -44,15 +44,15 @@ public class EnvoyLog {
 		} catch (SecurityException | IOException e) {
 			e.printStackTrace();
 		}
-		
+
 		ConsoleHandler ch = new ConsoleHandler();
-		ch.setLevel(Level.FINEST);
+		ch.setLevel(consoleLevelBarrier);
 		ch.setFormatter(formatter);
 		logger.addHandler(ch);
-		
+
 		return logger;
 	}
-	
+
 	/**
 	 * @return the fileLevelBarrier: The current barrier for writing logs to a file.
 	 * @since Envoy v0.2-alpha
@@ -66,5 +66,9 @@ public class EnvoyLog {
 	 *                         from 0 - 1000 or with the according name of the level
 	 * @since Envoy v0.2-alpha
 	 */
-	public static void setFileLevel(String fileLevelBarrier) { EnvoyLog.fileLevelBarrier = Level.parse(fileLevelBarrier); }
+	public static void setFileLevelBarrier(Level fileLevelBarrier) { EnvoyLog.fileLevelBarrier = fileLevelBarrier; }
+
+	public static Level getConsoleLevelBarrier() { return consoleLevelBarrier; }
+
+	public static void setConsoleLevelBarrier(Level consoleLevelBarrier) { EnvoyLog.consoleLevelBarrier = consoleLevelBarrier; }
 }