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shine-server-config/src/main/java/utils/config/AppConfig.java

@@ -0,0 +1,58 @@
+package utils.config;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+public final class AppConfig {
+
+    private static volatile AppConfig instance;
+    private final Properties properties = new Properties();
+
+    private AppConfig() {
+        load();
+    }
+
+    public static AppConfig getInstance() {
+        if (instance == null) {
+            synchronized (AppConfig.class) {
+                if (instance == null) {
+                    instance = new AppConfig();
+                }
+            }
+        }
+        return instance;
+    }
+
+    private void load() {
+        try (InputStream in = getClass().getClassLoader()
+                .getResourceAsStream("application.properties")) {
+
+            if (in == null) {
+                throw new RuntimeException("Config file application.properties not found");
+            }
+
+            properties.load(in);
+
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to load application.properties", e);
+        }
+    }
+
+    /** Вернёт значение строки или null, если параметр не найден */
+    public String getParam(String name) {
+        return properties.getProperty(name);
+    }
+
+    /** Можно добавить методы для удобства */
+    public int getInt(String name, int defaultValue) {
+        String v = properties.getProperty(name);
+        return v == null ? defaultValue : Integer.parseInt(v);
+    }
+
+    public boolean getBoolean(String name, boolean defaultValue) {
+        String v = properties.getProperty(name);
+        return v == null ? defaultValue : Boolean.parseBoolean(v);
+    }
+}