co.cask.cdap.common.zookeeper.coordination.DiscoverableCodec.java Source code

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Here is the source code for co.cask.cdap.common.zookeeper.coordination.DiscoverableCodec.java

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/*
 * Copyright  2014 Cask Data, Inc.
 *
 * 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 co.cask.cdap.common.zookeeper.coordination;

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.discovery.Discoverable;

import java.lang.reflect.Type;
import java.net.InetSocketAddress;

/**
 * A Gson codec for {@link Discoverable}.
 *
 * NOTE: This class may move to different package when needed.
 */
public class DiscoverableCodec implements JsonSerializer<Discoverable>, JsonDeserializer<Discoverable> {

    @Override
    public JsonElement serialize(Discoverable src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonObj = new JsonObject();
        jsonObj.addProperty("service", src.getName());
        jsonObj.addProperty("hostname", src.getSocketAddress().getHostName());
        jsonObj.addProperty("port", src.getSocketAddress().getPort());
        return jsonObj;
    }

    @Override
    public Discoverable deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObj = json.getAsJsonObject();
        final String service = jsonObj.get("service").getAsString();
        String hostname = jsonObj.get("hostname").getAsString();
        int port = jsonObj.get("port").getAsInt();
        final InetSocketAddress address = new InetSocketAddress(hostname, port);

        return new Discoverable() {
            @Override
            public String getName() {
                return service;
            }

            @Override
            public InetSocketAddress getSocketAddress() {
                return address;
            }
        };
    }
}