Log matches with sequential match ids

server/src/main/java/ru/croccode/hypernull/server/AsciiMatchPrinter.java

@@ -18,7 +18,7 @@ public class AsciiMatchPrinter implements MatchListener<Integer> {
 
 	private static final char FREE = ' ';
 	private static final char BLOCK = 'X';
-	private static final char COIN = '*';
+	private static final char COIN = '¤';
 	private static final char VIEW_MASK = '.';
 	private static final char MINING_MASK = '+';
 	private static final char ATTACK_MASK = '-';

server/src/main/java/ru/croccode/hypernull/server/HyperNull.java

@@ -87,11 +87,12 @@ private void runMatch(MatchMode mode, List<MatchRequest> matchRequests) {
 			botKey++;
 		}
 
+		String matchId = MatchId.nextId();
 		MatchMap map = mapRegistry.randomMap(numBots);
 		MatchConfig config = buildMatchConfig(mode, map);
 		List<MatchListener<Integer>> listeners = Arrays.asList(
 				new AsciiMatchPrinter(),
-				new MatchFileLogger<>(this.matchLogsFolder)
+				new MatchFileLogger<>(matchId, this.matchLogsFolder)
 		);
 		Match<Integer> match = new Match<>(map, config, botNames, listeners);
 		new MatchRunner(match, botSessions).run();
@@ -113,7 +114,7 @@ public void close() throws IOException {
 	}
 
 	public static void main(String[] args) throws IOException {
-		System.out.println("Запуск сервера...");
+		System.out.print("¤ ¤ ¤ HyperNull...");
 		String configPath = args.length > 0
 				? args[0]
 				: "hypernull.properties";
@@ -130,6 +131,7 @@ public static void main(String[] args) throws IOException {
 			app.close();
 			ThreadPools.shutdownAll();
 		})));
+		System.out.println(" READY ¤ ¤ ¤ ");
 		app.run();
 	}
 }

server/src/main/java/ru/croccode/hypernull/server/MatchFileLogger.java

@@ -13,17 +13,14 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Map;
-import java.util.UUID;
 
 public class MatchFileLogger<K> implements MatchListener<K> {
 
-    private final static String LOG_FILE_TEMPLATE = "%s/Match_log_%s.txt";
+    private final static String LOG_FILE_TEMPLATE = "%s/match_%s.log";
 
-    private final UUID matchId;
     private final PrintWriter logWriter;
 
-    public MatchFileLogger(String logsFolder) {
-        this.matchId = UUID.randomUUID();
+    public MatchFileLogger(String matchId, String logsFolder) {
         Path path = Paths.get(logsFolder);
         try {
             Files.createDirectories(path);

server/src/main/java/ru/croccode/hypernull/server/MatchId.java

@@ -0,0 +1,27 @@
+package ru.croccode.hypernull.server;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public final class MatchId {
+
+	private final static AtomicInteger COUNTER = new AtomicInteger(0);
+
+	private MatchId() {
+	}
+
+	public static String nextId() {
+		// format: current time (epoch millis)
+		// + 2 chars of sync match counter reminder
+		// separated by underscore
+		int n = 'z' - 'a' + 1;
+		int mod = n * n;
+		int k = COUNTER.getAndIncrement() % mod;
+		if (k < 0)
+			k += mod;
+		long now = System.currentTimeMillis();
+		return now
+				+ "_"
+				+ (char)('a' + (k / n))
+				+ (char)('a' + (k % n));
+	}
+}