jayendrap commented on code in PR #476:
URL: https://github.com/apache/atlas/pull/476#discussion_r2580011568


##########
intg/src/main/java/org/apache/atlas/ApplicationProperties.java:
##########
@@ -124,27 +124,57 @@ public static Configuration set(Configuration 
configuration) throws AtlasExcepti
         return instance;
     }
 
-    public static Configuration get(String fileName) throws AtlasException {
-        String confLocation = 
System.getProperty(ATLAS_CONFIGURATION_DIRECTORY_PROPERTY);
+    public static Configuration getConf(String absoluteFilePath) throws 
AtlasException {

Review Comment:
   Consider renaming to method name to "getConfFromAbsolutePath"



##########
intg/src/main/java/org/apache/atlas/ApplicationProperties.java:
##########
@@ -124,27 +124,57 @@ public static Configuration set(Configuration 
configuration) throws AtlasExcepti
         return instance;
     }
 
-    public static Configuration get(String fileName) throws AtlasException {
-        String confLocation = 
System.getProperty(ATLAS_CONFIGURATION_DIRECTORY_PROPERTY);
+    public static Configuration getConf(String absoluteFilePath) throws 
AtlasException {
+        if (instance == null) {
+            synchronized (ApplicationProperties.class) {
+                if (instance == null) {
+                    set(get(absoluteFilePath));
+                }
+            }
+        }
+        return instance;
+    }
 
+    public static Configuration getConf(PropertiesConfiguration clientConf) 
throws AtlasException {

Review Comment:
   Consider renaming the method name to "get" instead of "getConf"



##########
intg/src/main/java/org/apache/atlas/ApplicationProperties.java:
##########
@@ -124,27 +124,57 @@ public static Configuration set(Configuration 
configuration) throws AtlasExcepti
         return instance;
     }
 
-    public static Configuration get(String fileName) throws AtlasException {
-        String confLocation = 
System.getProperty(ATLAS_CONFIGURATION_DIRECTORY_PROPERTY);
+    public static Configuration getConf(String absoluteFilePath) throws 
AtlasException {
+        if (instance == null) {
+            synchronized (ApplicationProperties.class) {
+                if (instance == null) {
+                    set(get(absoluteFilePath));
+                }
+            }
+        }
+        return instance;
+    }
 
+    public static Configuration getConf(PropertiesConfiguration clientConf) 
throws AtlasException {
+        if (instance == null) {
+            synchronized (ApplicationProperties.class) {
+                if (instance == null) {
+                    set(clientConf);
+                }
+            }
+        }
+        return instance;
+    }
+
+    public static Configuration get(String fileName) throws AtlasException {
         try {
-            URL url;
+            URL url = null;
 
-            if (confLocation == null) {
-                LOG.info("Looking for {} in classpath", fileName);
+            if (StringUtils.isNotBlank(fileName)) {
+                File file = new File(fileName);
+                if (file.exists()) {
+                    url = file.toURI().toURL();
+                    LOG.info("Loading {} from {}", fileName, url);

Review Comment:
   Same log is also printed at the end of the method, so we can remove this.



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