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/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program 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 3 of the License, or (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.application.es;
import com.google.common.net.HostAndPort;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.util.Arrays;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.ssl.SSLContexts;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthRequest;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.elasticsearch.core.TimeValue.timeValueSeconds;
public class EsConnectorImpl implements EsConnector {
private static final String ES_USERNAME = "elastic";
private static final Logger LOG = LoggerFactory.getLogger(EsConnectorImpl.class);
private final AtomicReference<RestHighLevelClient> restClient = new AtomicReference<>(null);
private final Set<HostAndPort> hostAndPorts;
private final String searchPassword;
private final Path keyStorePath;
private final String keyStorePassword;
public EsConnectorImpl(Set<HostAndPort> hostAndPorts, @Nullable String searchPassword, @Nullable Path keyStorePath,
@Nullable String keyStorePassword) {
this.hostAndPorts = hostAndPorts;
this.searchPassword = searchPassword;
this.keyStorePath = keyStorePath;
this.keyStorePassword = keyStorePassword;
}
@Override
public Optional<ClusterHealthStatus> getClusterHealthStatus() {
try {
ClusterHealthResponse healthResponse = getRestHighLevelClient().cluster()
.health(new ClusterHealthRequest().waitForYellowStatus().timeout(timeValueSeconds(30)), RequestOptions.DEFAULT);
return Optional.of(healthResponse.getStatus());
} catch (IOException e) {
LOG.trace("Failed to check health status ", e);
return Optional.empty();
}
}
@Override
public void stop() {
RestHighLevelClient restHighLevelClient = restClient.get();
if (restHighLevelClient != null) {
try {
restHighLevelClient.close();
} catch (IOException e) {
LOG.warn("Error occurred while closing Rest Client", e);
}
}
}
private RestHighLevelClient getRestHighLevelClient() {
RestHighLevelClient res = this.restClient.get();
if (res != null) {
return res;
}
RestHighLevelClient restHighLevelClient = buildRestHighLevelClient();
this.restClient.set(restHighLevelClient);
return restHighLevelClient;
}
private RestHighLevelClient buildRestHighLevelClient() {
HttpHost[] httpHosts = hostAndPorts.stream()
.map(this::toHttpHost)
.toArray(HttpHost[]::new);
LOG.atDebug()
.addArgument(Arrays.stream(httpHosts)
.map(t -> t.getHostName() + ":" + t.getPort())
.collect(Collectors.joining(", ")))
.log("Connected to Elasticsearch node: [{}]");
RestClientBuilder builder = RestClient.builder(httpHosts)
.setHttpClientConfigCallback(httpClientBuilder -> {
if (searchPassword != null) {
BasicCredentialsProvider provider = getBasicCredentialsProvider(searchPassword);
httpClientBuilder.setDefaultCredentialsProvider(provider);
}
if (keyStorePath != null) {
SSLContext sslContext = getSSLContext(keyStorePath, keyStorePassword);
httpClientBuilder.setSSLContext(sslContext);
}
return httpClientBuilder;
});
return new RestHighLevelClient(builder);
}
private HttpHost toHttpHost(HostAndPort host) {
try {
String scheme = keyStorePath != null ? "https" : HttpHost.DEFAULT_SCHEME_NAME;
if ("true".equalsIgnoreCase(System.getProperty("java.net.preferIPv6Addresses"))) {
// host.getHost() returns IP address. This is required for HttpHost to work as we need to use IP address in the RestClient to
// correctly resolve the host. Otherwise, RestClient will try to find the ip using hostname, and it might fail in case of IPv6.
return new HttpHost(InetAddress.getByName(host.getHost()), host.getHost(), host.getPortOrDefault(9001), scheme);
}
return new HttpHost(InetAddress.getByName(host.getHost()), host.getPortOrDefault(9001), scheme);
} catch (UnknownHostException e) {
throw new IllegalStateException("Can not resolve host [" + host + "]", e);
}
}
private static BasicCredentialsProvider getBasicCredentialsProvider(String searchPassword) {
BasicCredentialsProvider provider = new BasicCredentialsProvider();
provider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(ES_USERNAME, searchPassword));
return provider;
}
private static SSLContext getSSLContext(Path keyStorePath, @Nullable String keyStorePassword) {
try {
KeyStore keyStore = KeyStore.getInstance("pkcs12");
try (InputStream is = Files.newInputStream(keyStorePath)) {
keyStore.load(is, keyStorePassword == null ? null : keyStorePassword.toCharArray());
}
SSLContextBuilder sslBuilder = SSLContexts.custom().loadTrustMaterial(keyStore, null);
return sslBuilder.build();
} catch (IOException | GeneralSecurityException e) {
throw new IllegalStateException("Failed to setup SSL context on ES client", e);
}
}
}
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