org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration.java Source code

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Here is the source code for org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration.java

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/*
 * Copyright 2012-2015 the original author or authors.
 *
 * 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 org.springframework.boot.autoconfigure.data.elasticsearch;

import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.lease.Releasable;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.node.Node;
import org.elasticsearch.node.NodeBuilder;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.client.NodeClientFactoryBean;
import org.springframework.data.elasticsearch.client.TransportClientFactoryBean;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.StringUtils;

/**
 * {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration
 * Auto-configuration} for Elasticsearch.
 *
 * @author Artur Konczak
 * @author Mohsin Husen
 * @author Andy Wilkinson
 * @since 1.1.0
 */
@Configuration
@ConditionalOnClass({ Client.class, TransportClientFactoryBean.class, NodeClientFactoryBean.class })
@EnableConfigurationProperties(ElasticsearchProperties.class)
public class ElasticsearchAutoConfiguration implements DisposableBean {

    private static final Map<String, String> DEFAULTS;

    static {
        Map<String, String> defaults = new LinkedHashMap<String, String>();
        defaults.put("http.enabled", String.valueOf(false));
        defaults.put("node.local", String.valueOf(true));
        DEFAULTS = Collections.unmodifiableMap(defaults);
    }

    private static Log logger = LogFactory.getLog(ElasticsearchAutoConfiguration.class);

    @Autowired
    private ElasticsearchProperties properties;

    private Releasable releasable;

    @Bean
    @ConditionalOnMissingBean
    public Client elasticsearchClient() {
        try {
            return createClient();
        } catch (Exception ex) {
            throw new IllegalStateException(ex);
        }
    }

    private Client createClient() throws Exception {
        if (StringUtils.hasLength(this.properties.getClusterNodes())) {
            return createTransportClient();
        }
        return createNodeClient();
    }

    private Client createNodeClient() throws Exception {
        ImmutableSettings.Builder settings = ImmutableSettings.settingsBuilder();
        for (Map.Entry<String, String> entry : DEFAULTS.entrySet()) {
            if (!this.properties.getProperties().containsKey(entry.getKey())) {
                settings.put(entry.getKey(), entry.getValue());
            }
        }
        settings.put(this.properties.getProperties());
        Node node = new NodeBuilder().settings(settings).clusterName(this.properties.getClusterName()).node();
        this.releasable = node;
        return node.client();
    }

    private Client createTransportClient() throws Exception {
        TransportClientFactoryBean factory = new TransportClientFactoryBean();
        factory.setClusterNodes(this.properties.getClusterNodes());
        factory.setProperties(createProperties());
        factory.afterPropertiesSet();
        TransportClient client = factory.getObject();
        this.releasable = client;
        return client;
    }

    private Properties createProperties() {
        Properties properties = new Properties();
        properties.put("cluster.name", this.properties.getClusterName());
        properties.putAll(this.properties.getProperties());
        return properties;
    }

    @Override
    public void destroy() throws Exception {
        if (this.releasable != null) {
            try {
                if (logger.isInfoEnabled()) {
                    logger.info("Closing Elasticsearch client");
                }
                try {
                    this.releasable.close();
                } catch (NoSuchMethodError ex) {
                    // Earlier versions of Elasticsearch had a different method name
                    ReflectionUtils.invokeMethod(ReflectionUtils.findMethod(Releasable.class, "release"),
                            this.releasable);
                }
            } catch (final Exception ex) {
                if (logger.isErrorEnabled()) {
                    logger.error("Error closing Elasticsearch client: ", ex);
                }
            }
        }
    }

}