org.apache.twill.internal.json.ResourceReportCodec.java Source code

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Here is the source code for org.apache.twill.internal.json.ResourceReportCodec.java

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/*
 * 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 com.google.gson.reflect.TypeToken;
import org.apache.twill.api.ResourceReport;
import org.apache.twill.api.TwillRunResources;
import org.apache.twill.internal.DefaultResourceReport;

import java.lang.reflect.Type;
import java.util.Collection;
import java.util.List;
import java.util.Map;

/**
 * Codec for serializing and deserializing a {@link ResourceReport} object using json.
 */
public final class ResourceReportCodec implements JsonSerializer<ResourceReport>, JsonDeserializer<ResourceReport> {

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

        json.addProperty("appMasterId", src.getApplicationId());
        json.add("appMasterResources",
                context.serialize(src.getAppMasterResources(), new TypeToken<TwillRunResources>() {
                }.getType()));
        json.add("runnableResources",
                context.serialize(src.getResources(), new TypeToken<Map<String, Collection<TwillRunResources>>>() {
                }.getType()));
        json.add("services", context.serialize(src.getServices(), new TypeToken<List<String>>() {
        }.getType()));
        return json;
    }

    @Override
    public ResourceReport deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObj = json.getAsJsonObject();
        String appMasterId = jsonObj.get("appMasterId").getAsString();
        TwillRunResources masterResources = context.deserialize(jsonObj.get("appMasterResources"),
                TwillRunResources.class);
        Map<String, Collection<TwillRunResources>> resources = context.deserialize(jsonObj.get("runnableResources"),
                new TypeToken<Map<String, Collection<TwillRunResources>>>() {
                }.getType());
        List<String> services = context.deserialize(jsonObj.get("services"), new TypeToken<List<String>>() {
        }.getType());

        return new DefaultResourceReport(appMasterId, masterResources, resources, services);
    }
}