software.uncharted.elasticsearch.ElasticClient.java Source code

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Here is the source code for software.uncharted.elasticsearch.ElasticClient.java

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/*
 * Copyright 2016 Uncharted Software 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 software.uncharted.elasticsearch;

import lombok.NoArgsConstructor;
import org.elasticsearch.action.index.IndexRequestBuilder;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.net.InetAddress;
import java.util.Properties;

/**
 * Class to create, initialize and hold an app-wide singleton instance of an elastic search Java client.
 */
@Service
@NoArgsConstructor
public class ElasticClient {

    private String elasticHost = "localhost";
    private Integer elasticPort = 9300;
    private String elasticCluster = "elasticsearch";
    private String indexName = "image_similarity";
    private String indexType = "datum";

    private TransportClient client;

    public ElasticClient(Properties props) {
        elasticHost = props.getProperty("spring.elastic-connector.host");
        elasticPort = Integer.parseInt(props.getProperty("spring.elastic-connector.port"), 10);
        elasticCluster = props.getProperty("spring.elastic-connector.cluster");
        indexName = props.getProperty("spring.elastic-connector.index");
        indexType = props.getProperty("spring.elastic-connector.type");
    }

    @PostConstruct
    public ElasticClient init() throws Exception {

        final Settings settings = Settings.settingsBuilder().put("cluster.name", elasticCluster)
                .put("client.transport.sniff", false).build();

        try {
            client = TransportClient.builder().settings(settings).build();
            client.addTransportAddress(
                    new InetSocketTransportAddress(InetAddress.getByName(elasticHost), elasticPort));
        } catch (final Exception ex) {
            throw new Exception("Could not connect to Elastic.", ex);
        }
        return this;
    }

    public TransportClient getClient() {
        return client;
    }

    public SearchRequestBuilder prepareSearch() {
        return client.prepareSearch().setIndices(indexName).setTypes(indexType);
    }

    public SearchResponse executeSearch(SearchRequestBuilder builder) {
        //TODO: logging
        return builder.get();
    }

    public IndexRequestBuilder prepareIndex() {
        return client.prepareIndex().setIndex(indexName).setType(indexType);
    }

    public IndexResponse executeIndex(IndexRequestBuilder builder) {
        //TODO: logging
        return builder.get();
    }
}