com.netflix.raigad.resources.ElasticsearchConfig.java Source code

Introduction

Here is the source code for com.netflix.raigad.resources.ElasticsearchConfig.java

Source

/**
 * Copyright 2014 Netflix, 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 com.netflix.raigad.resources;

import com.google.inject.Inject;
import com.netflix.raigad.identity.RaigadInstance;
import com.netflix.raigad.startup.RaigadServer;
import com.netflix.raigad.utils.EsUtils;
import org.json.simple.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.util.List;

/**
 * This servlet will provide the configuration API service as and when Elasticsearch
 * requests for it.
 */
@Path("/v1/esconfig")
@Produces(MediaType.TEXT_PLAIN)
public class ElasticsearchConfig {
    private static final Logger logger = LoggerFactory.getLogger(ElasticsearchConfig.class);
    private final RaigadServer raigadServer;

    @Inject
    public ElasticsearchConfig(RaigadServer raigadServer) {
        this.raigadServer = raigadServer;
    }

    @GET
    @Path("/get_nodes")
    public Response getNodes() {
        try {
            logger.info("Fetching nodes via get_nodes ...");
            final List<RaigadInstance> instances = raigadServer.getInstanceManager().getAllInstances();
            if (instances != null && !instances.isEmpty()) {
                JSONObject esCarJson = EsUtils.transformRaigadInstanceToJson(instances);
                return Response.ok(esCarJson.toString()).build();
            }
        } catch (Exception e) {
            logger.error("Error while executing get_nodes", e);
            return Response.serverError().build();
        }
        return Response.status(500).build();
    }

}