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From GitBox <...@apache.org>
Subject [GitHub] ajorgensen commented on a change in pull request #2842: Add json format for dry-run
Date Wed, 04 Apr 2018 17:47:01 GMT
ajorgensen commented on a change in pull request #2842: Add json format for dry-run
URL: https://github.com/apache/incubator-heron/pull/2842#discussion_r179227062
 
 

 ##########
 File path: heron/scheduler-core/src/java/com/twitter/heron/scheduler/dryrun/JsonFormatterUtils.java
 ##########
 @@ -0,0 +1,87 @@
+//  Copyright 2018 Twitter. All rights reserved.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+package com.twitter.heron.scheduler.dryrun;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import com.twitter.heron.spi.packing.PackingPlan;
+import com.twitter.heron.spi.packing.Resource;
+
+public class JsonFormatterUtils {
+
+  private final ObjectMapper mapper;
 
 Review comment:
   I've never used `ObjectWriter` but from what I can tell the benefit is it has a formatted
output via `mapper.withDefaultPrettyPrinter()`. As i mentioned in another comment I want this
output to be machine readable. If someone wants the output to be printed nicely it would be
as simple as `heron submit --dry-run --dry-run-format=json ... | python -m json.tool`. Sorry
I didnt make the machine readability of this output clear in the description.

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