configuration file

src/main/java/ru/dmitriymx/minecraft/globalchat/Config.java

@@ -0,0 +1,63 @@
+package ru.dmitriymx.minecraft.globalchat;
+
+import lombok.AllArgsConstructor;
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.util.List;
+import java.util.StringJoiner;
+
+@AllArgsConstructor
+class Config {
+
+    private JavaPlugin plugin;
+    private FileConfiguration config;
+
+    String getHosts() {
+        String hosts;
+        List<String> hostList = config.getStringList("kafka.hosts");
+        if (hostList.size() == 0) {
+            Bukkit.getServer().getPluginManager().disablePlugin(plugin);
+            throw new RuntimeException("Empty field 'kafka.hosts'!");
+        } else if (hostList.size() == 1) {
+            hosts = hostList.get(0);
+        } else {
+            StringJoiner sj = new StringJoiner(",");
+            hostList.forEach(sj::add);
+            hosts = sj.toString();
+        }
+
+        return hosts;
+    }
+
+    String getTopic() {
+        String topic = config.getString("kafka.topic");
+        if (topic == null || topic.trim().isEmpty()) {
+            Bukkit.getServer().getPluginManager().disablePlugin(plugin);
+            throw new RuntimeException("Empty field 'kafka.topic'!");
+        }
+
+        return topic;
+    }
+
+    long getDuration() {
+        long duration = config.getLong("kafka.duration");
+        if (duration == 0L) {
+            plugin.getLogger().warning("Field 'kafka.duration' is verry low. Set default value 1000.");
+            duration = 1000L;
+        }
+
+        return duration;
+    }
+
+    String getFormat() {
+        String format = config.getString("message_format");
+        if (format.trim().isEmpty()) {
+            plugin.getLogger().warning("Field 'message_format' is empty. Set default value '{0}: {1}'.");
+            format = "{0}: {1}";
+        }
+
+        return format;
+    }
+}