/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.portal.search.elasticsearch.internal.connection;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.search.elasticsearch.configuration.ElasticsearchConfiguration;
import com.liferay.portal.search.elasticsearch.connection.ElasticsearchConnection;
import com.liferay.portal.search.elasticsearch.index.IndexFactory;
import com.liferay.portal.search.elasticsearch.settings.ClientSettingsHelper;
import com.liferay.portal.search.elasticsearch.settings.SettingsContributor;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.Future;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthRequestBuilder;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.client.AdminClient;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.ClusterAdminClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
/**
* @author Michael C. Han
*/
public abstract class BaseElasticsearchConnection
implements ElasticsearchConnection {
@Override
public void close() {
if (_client == null) {
return;
}
_client.close();
_client = null;
}
@Override
public void connect() {
loadOptionalDefaultConfigurations();
loadAdditionalConfigurations();
loadRequiredDefaultConfigurations();
loadSettingsContributors();
_client = createClient();
}
@Override
public Client getClient() {
return _client;
}
@Override
public ClusterHealthResponse getClusterHealthResponse(long timeout) {
Client client = getClient();
AdminClient adminClient = client.admin();
ClusterAdminClient clusterAdminClient = adminClient.cluster();
ClusterHealthRequestBuilder clusterHealthRequestBuilder =
clusterAdminClient.prepareHealth();
clusterHealthRequestBuilder.setTimeout(
TimeValue.timeValueMillis(timeout));
clusterHealthRequestBuilder.setWaitForYellowStatus();
Future<ClusterHealthResponse> future =
clusterHealthRequestBuilder.execute();
try {
return future.get();
}
catch (Exception e) {
throw new IllegalStateException(e);
}
}
public boolean isConnected() {
if (_client != null) {
return true;
}
return false;
}
public void setIndexFactory(IndexFactory indexFactory) {
_indexFactory = indexFactory;
}
protected void addSettingsContributor(
SettingsContributor settingsContributor) {
_settingsContributors.add(settingsContributor);
}
protected abstract Client createClient();
protected IndexFactory getIndexFactory() {
return _indexFactory;
}
protected void loadAdditionalConfigurations() {
String additionalConfigurations =
elasticsearchConfiguration.additionalConfigurations();
if (Validator.isNotNull(additionalConfigurations)) {
settingsBuilder.loadFromSource(additionalConfigurations);
}
}
protected void loadOptionalDefaultConfigurations() {
try {
Class<?> clazz = getClass();
String defaultConfiguration =
"/META-INF/elasticsearch-optional-defaults.yml";
InputStream inputStream = clazz.getResourceAsStream(
defaultConfiguration);
settingsBuilder.loadFromStream(defaultConfiguration, inputStream);
}
catch (Exception e) {
if (_log.isInfoEnabled()) {
_log.info("Unable to load optional default configurations", e);
}
}
}
protected abstract void loadRequiredDefaultConfigurations();
protected void loadSettingsContributors() {
ClientSettingsHelper clientSettingsHelper = new ClientSettingsHelper() {
@Override
public void addPlugin(String plugin) {
transportClientPlugins.add(plugin);
}
@Override
public void put(String setting, String value) {
settingsBuilder.put(setting, value);
}
@Override
public void putArray(String setting, String... values) {
settingsBuilder.putArray(setting, values);
}
};
for (SettingsContributor settingsContributor : _settingsContributors) {
settingsContributor.populate(clientSettingsHelper);
}
}
protected void removeSettingsContributor(
SettingsContributor settingsContributor) {
_settingsContributors.remove(settingsContributor);
}
protected volatile ElasticsearchConfiguration elasticsearchConfiguration;
protected final Settings.Builder settingsBuilder = Settings.builder();
protected final List<String> transportClientPlugins = new ArrayList<>(1);
private static final Log _log = LogFactoryUtil.getLog(
BaseElasticsearchConnection.class);
private Client _client;
private IndexFactory _indexFactory;
private final Set<SettingsContributor> _settingsContributors =
new ConcurrentSkipListSet<>();
}