fix(config): java.nio.file.FileSystemNotFoundException

Author: codeboyzhou

src/main/java/com/github/codeboyzhou/mcp/declarative/configuration/YAMLConfigurationLoader.java

@@ -2,6 +2,7 @@
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+import com.github.codeboyzhou.mcp.declarative.exception.McpServerException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -23,8 +24,6 @@ public class YAMLConfigurationLoader {
 
     private static final ObjectMapper YAML_MAPPER = new ObjectMapper(new YAMLFactory());
 
-    private static final String DEFAULT_CONFIG_FILE_NAME = "mcp-server-default.yml";
-
     private static final String CONFIG_FILE_NAME = "mcp-server.yml";
 
     private static final String WATCH_THREAD_NAME = "McpServerConfigFileWatcher";
@@ -54,9 +53,8 @@ private Path getConfigFilePath(String fileName) {
             ClassLoader classLoader = YAMLConfigurationLoader.class.getClassLoader();
             URL configFileUrl = classLoader.getResource(fileName);
             if (configFileUrl == null) {
-                configFileUrl = classLoader.getResource(DEFAULT_CONFIG_FILE_NAME);
+                throw new McpServerException("Configuration file not found: " + fileName);
             }
-            assert configFileUrl != null;
             return Paths.get(configFileUrl.toURI());
         } catch (URISyntaxException e) {
             // should never happen

src/main/java/com/github/codeboyzhou/mcp/declarative/exception/McpServerException.java

@@ -2,6 +2,10 @@
 
 public class McpServerException extends RuntimeException {
 
+    public McpServerException(String message) {
+        super(message);
+    }
+
     public McpServerException(String message, Throwable cause) {
         super(message, cause);
     }

src/main/resources/mcp-server-default.yml renamed to src/test/resources/mcp-server.yml

@@ -1,8 +1,8 @@
 enabled: true
 stdio: false
-name: mcp-server
+name: mcp-server-test
 version: 1.0.0
-type: SYNC
+type: ASYNC
 request-timeout: 20000
 capabilities:
   resource: true