Package org.apache.twill.internal.json

Source Code of org.apache.twill.internal.json.TwillRunResourcesCodec

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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 org.apache.twill.internal.json;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import org.apache.twill.api.TwillRunResources;
import org.apache.twill.internal.DefaultTwillRunResources;

import java.lang.reflect.Type;

/**
* Codec for serializing and deserializing a {@link org.apache.twill.api.TwillRunResources} object using json.
*/
public final class TwillRunResourcesCodec implements JsonSerializer<TwillRunResources>,
                                              JsonDeserializer<TwillRunResources> {

  @Override
  public JsonElement serialize(TwillRunResources src, Type typeOfSrc, JsonSerializationContext context) {
    JsonObject json = new JsonObject();

    json.addProperty("containerId", src.getContainerId());
    json.addProperty("instanceId", src.getInstanceId());
    json.addProperty("host", src.getHost());
    json.addProperty("memoryMB", src.getMemoryMB());
    json.addProperty("virtualCores", src.getVirtualCores());
    if (src.getDebugPort() != null) {
      json.addProperty("debugPort", src.getDebugPort());
    }

    return json;
  }

  @Override
  public TwillRunResources deserialize(JsonElement json, Type typeOfT,
                                           JsonDeserializationContext context) throws JsonParseException {
    JsonObject jsonObj = json.getAsJsonObject();
    return new DefaultTwillRunResources(jsonObj.get("instanceId").getAsInt(),
                                        jsonObj.get("containerId").getAsString(),
                                        jsonObj.get("virtualCores").getAsInt(),
                                        jsonObj.get("memoryMB").getAsInt(),
                                        jsonObj.get("host").getAsString(),
                                        jsonObj.has("debugPort") ? jsonObj.get("debugPort").getAsInt() : null);
  }
}
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