fixed bug:ResourceUtils can't read resoucre from jar.

apm-collector/apm-collector-core/src/main/java/org/skywalking/apm/collector/core/module/ModuleConfigLoader.java

@@ -19,7 +19,7 @@
 package org.skywalking.apm.collector.core.module;
 
 import java.io.FileNotFoundException;
-import java.io.FileReader;
+import java.io.Reader;
 import java.util.Map;
 import org.skywalking.apm.collector.core.config.ConfigLoader;
 import org.skywalking.apm.collector.core.framework.DefineException;
@@ -39,8 +39,8 @@ public class ModuleConfigLoader implements ConfigLoader<Map<String, Map>> {
         Yaml yaml = new Yaml();
         try {
             try {
-                FileReader applicationFileReader = ResourceUtils.read("application.yml");
-                return (Map<String, Map>)yaml.load(applicationFileReader);
+                Reader applicationReader = ResourceUtils.read("application.yml");
+                return (Map<String, Map>)yaml.load(applicationReader);
             } catch (FileNotFoundException e) {
                 logger.info("Could not found application.yml file, use default");
                 return (Map<String, Map>)yaml.load(ResourceUtils.read("application-default.yml"));

apm-collector/apm-collector-core/src/main/java/org/skywalking/apm/collector/core/util/ResourceUtils.java

@@ -18,9 +18,10 @@
 
 package org.skywalking.apm.collector.core.util;
 
-import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.FileReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
 import java.net.URL;
 
 /**
@@ -28,12 +29,12 @@ import java.net.URL;
  */
 public class ResourceUtils {
 
-    public static FileReader read(String fileName) throws FileNotFoundException {
+    public static Reader read(String fileName) throws FileNotFoundException {
         URL url = ResourceUtils.class.getClassLoader().getResource(fileName);
         if (url == null) {
             throw new FileNotFoundException("file not found: " + fileName);
         }
-        File file = new File(ResourceUtils.class.getClassLoader().getResource(fileName).getFile());
-        return new FileReader(file);
+        InputStream inputStream = ResourceUtils.class.getClassLoader().getResourceAsStream(fileName);
+        return new InputStreamReader(inputStream);
     }
 }

apm-collector/apm-collector-core/src/test/java/org/skywalking/apm/collector/core/module/ModuleConfigLoaderTestCase.java

+package org.skywalking.apm.collector.core.module;
+
+import java.util.Map;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.skywalking.apm.collector.core.framework.DefineException;
+
+public class ModuleConfigLoaderTestCase {
+
+	@SuppressWarnings({ "rawtypes" })
+	@Test
+	public void testLoad() throws DefineException {
+		ModuleConfigLoader configLoader = new ModuleConfigLoader();
+        Map<String, Map> configuration = configLoader.load();
+		Assert.assertNotNull(configuration.get("cluster"));
+		Assert.assertNotNull(configuration.get("cluster").get("zookeeper"));
+	}
+}

apm-collector/apm-collector-core/src/test/java/org/skywalking/apm/collector/core/utils/ResourceUtilsTestCase.java

+package org.skywalking.apm.collector.core.utils;
+
+import java.io.IOException;
+import java.io.Reader;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.skywalking.apm.collector.core.util.ResourceUtils;
+
+public class ResourceUtilsTestCase {
+
+    @Test
+    public void testRead() throws IOException {
+        Reader reader = ResourceUtils.read("application.yml");
+        Assert.assertNotNull(reader);
+        reader.close();
+    }
+
+}