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_r179223844
 
 

 ##########
 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;
+
+  public JsonFormatterUtils() {
+    mapper = new ObjectMapper();
+  }
+
+  public String renderPackingPlan(String topologyName, String packingClass,
+                                      PackingPlan packingPlan) throws 
JsonProcessingException {
+    ObjectNode topLevel = mapper.createObjectNode();
+    topLevel.put("packingClass", packingClass);
+    topLevel.put("topology", topologyName);
+
+    ArrayNode containers = mapper.createArrayNode();
+
+    for (PackingPlan.ContainerPlan containerPlan : 
packingPlan.getContainers()) {
+      ObjectNode planNode = mapper.createObjectNode();
+      planNode.put("taskId", containerPlan.getId());
+      containers.add(renderContainerPlan(containerPlan));
+    }
+
+    topLevel.set("containers", containers);
+
+    return mapper.writeValueAsString(topLevel);
+  }
+
+  ObjectNode renderContainerPlan(PackingPlan.ContainerPlan containerPlan) {
+    Resource requiredResources = containerPlan.getRequiredResource();
+    ObjectNode resources = mapper.createObjectNode();
+    resources.put("cpu", requiredResources.getCpu());
+    resources.put("ram", requiredResources.getRam().asBytes());
 
 Review comment:
   This is meant to be machine readable, all of the other formats are human 
readable. As such I think the raw byte amount would be easier for a machine to 
parse than having to know the format of `toString()` and parse accordingly.

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


With regards,
Apache Git Services

Reply via email to