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

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Here is the source code for org.apache.twill.internal.json.TwillRuntimeSpecificationCodec.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.common.reflect.TypeToken;
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.TwillSpecification;
import org.apache.twill.internal.RunIds;
import org.apache.twill.internal.TwillRuntimeSpecification;

import java.lang.reflect.Type;
import java.net.URI;
import java.util.Map;

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

    private static final String FS_USER = "fsUser";
    private static final String TWILL_APP_DIR = "twillAppDir";
    private static final String ZK_CONNECT_STR = "zkConnectStr";
    private static final String TWILL_RUNID = "twillRunId";
    private static final String TWILL_APP_NAME = "twillAppName";
    private static final String RESERVED_MEMORY = "reservedMemory";
    private static final String HEAP_RESERVED_MIN_RATIO = "minHeapRatio";
    private static final String RM_SCHEDULER_ADDR = "rmSchedulerAddr";
    private static final String TWILL_SPEC = "twillSpecification";
    private static final String LOG_LEVELS = "logLevels";
    private static final String MAX_RETRIES = "maxRetries";
    private static final String LOG_COLLECTION_ENABLED = "logCollectionEnabled";

    @Override
    public JsonElement serialize(TwillRuntimeSpecification src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject json = new JsonObject();
        json.addProperty(FS_USER, src.getFsUser());
        json.addProperty(TWILL_APP_DIR, src.getTwillAppDir().toASCIIString());
        json.addProperty(ZK_CONNECT_STR, src.getZkConnectStr());
        json.addProperty(TWILL_RUNID, src.getTwillAppRunId().getId());
        json.addProperty(TWILL_APP_NAME, src.getTwillAppName());
        json.addProperty(RESERVED_MEMORY, src.getReservedMemory());
        json.addProperty(HEAP_RESERVED_MIN_RATIO, src.getMinHeapRatio());
        if (src.getRmSchedulerAddr() != null) {
            json.addProperty(RM_SCHEDULER_ADDR, src.getRmSchedulerAddr());
        }
        json.add(TWILL_SPEC, context.serialize(src.getTwillSpecification(), new TypeToken<TwillSpecification>() {
        }.getType()));
        json.add(LOG_LEVELS,
                context.serialize(src.getLogLevels(), new TypeToken<Map<String, Map<String, String>>>() {
                }.getType()));
        json.add(MAX_RETRIES, context.serialize(src.getMaxRetries(), new TypeToken<Map<String, Integer>>() {
        }.getType()));
        json.addProperty(LOG_COLLECTION_ENABLED, src.isLogCollectionEnabled());

        return json;
    }

    @Override
    public TwillRuntimeSpecification deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObj = json.getAsJsonObject();

        TwillSpecification twillSpecification = context.deserialize(jsonObj.get(TWILL_SPEC),
                new TypeToken<TwillSpecification>() {
                }.getType());
        Map<String, Map<String, String>> logLevels = context.deserialize(jsonObj.get(LOG_LEVELS),
                new TypeToken<Map<String, Map<String, String>>>() {
                }.getType());
        Map<String, Integer> maxRetries = context.deserialize(jsonObj.get(MAX_RETRIES),
                new TypeToken<Map<String, Integer>>() {
                }.getType());

        return new TwillRuntimeSpecification(twillSpecification, jsonObj.get(FS_USER).getAsString(),
                URI.create(jsonObj.get(TWILL_APP_DIR).getAsString()), jsonObj.get(ZK_CONNECT_STR).getAsString(),
                RunIds.fromString(jsonObj.get(TWILL_RUNID).getAsString()),
                jsonObj.get(TWILL_APP_NAME).getAsString(), jsonObj.get(RESERVED_MEMORY).getAsInt(),
                jsonObj.has(RM_SCHEDULER_ADDR) ? jsonObj.get(RM_SCHEDULER_ADDR).getAsString() : null, logLevels,
                maxRetries, jsonObj.get(HEAP_RESERVED_MIN_RATIO).getAsDouble(),
                jsonObj.get(LOG_COLLECTION_ENABLED).getAsBoolean());
    }
}