HDFS-12037. Ozone: Improvement rest API output format for better looking. Contributed by Weiwei Yang.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/BucketInfo.java

@@ -56,7 +56,8 @@ public class BucketInfo implements Comparable<BucketInfo> {
     mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
     mapper.addMixIn(Object.class, MixIn.class);
 
-    WRITER = mapper.writer(filters);
+    mapper.setFilterProvider(filters);
+    WRITER = mapper.writerWithDefaultPrettyPrinter();
   }
 
   private String volumeName;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/KeyInfo.java

@@ -54,7 +54,8 @@ public class KeyInfo implements Comparable<KeyInfo> {
         JsonAutoDetect.Visibility.ANY);
     mapper.addMixIn(Object.class, MixIn.class);
 
-    WRITER = mapper.writer(filters);
+    mapper.setFilterProvider(filters);
+    WRITER = mapper.writerWithDefaultPrettyPrinter();
   }
 
   /**

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/ListBuckets.java

@@ -55,7 +55,8 @@ public class ListBuckets {
         JsonAutoDetect.Visibility.ANY);
     mapper.addMixIn(Object.class, MixIn.class);
 
-    WRITER = mapper.writer(filters);
+    mapper.setFilterProvider(filters);
+    WRITER = mapper.writerWithDefaultPrettyPrinter();
   }
 
   private List<BucketInfo> buckets;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/ListKeys.java

@@ -58,7 +58,8 @@ public class ListKeys {
         JsonAutoDetect.Visibility.ANY);
     mapper.addMixIn(Object.class, MixIn.class);
 
-    WRITER = mapper.writer(filters);
+    mapper.setFilterProvider(filters);
+    WRITER = mapper.writerWithDefaultPrettyPrinter();
   }
 
   private String name;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/ListVolumes.java

@@ -59,7 +59,8 @@ public class ListVolumes {
         JsonAutoDetect.Visibility.ANY);
     mapper.addMixIn(Object.class, MixIn.class);
 
-    WRITER = mapper.writer(filters);
+    mapper.setFilterProvider(filters);
+    WRITER = mapper.writerWithDefaultPrettyPrinter();
   }
 
   /**

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/VolumeInfo.java

@@ -58,7 +58,8 @@ public class VolumeInfo implements Comparable<VolumeInfo> {
         JsonAutoDetect.Visibility.ANY);
     mapper.addMixIn(Object.class, MixIn.class);
 
-    WRITER = mapper.writer(filters);
+    mapper.setFilterProvider(filters);
+    WRITER = mapper.writerWithDefaultPrettyPrinter();
   }
 
   /**