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// Copyright (C) 2017 The Android Open Source Project
//
// 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.google.gerrit.elasticsearch;
import static com.google.common.base.MoreObjects.firstNonNull;
import com.google.common.base.Strings;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.inject.Inject;
import com.google.inject.ProvisionException;
import com.google.inject.Singleton;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.apache.http.HttpHost;
import org.eclipse.jgit.lib.Config;
@Singleton
class ElasticConfiguration {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
static final String SECTION_ELASTICSEARCH = "elasticsearch";
static final String KEY_PASSWORD = "password";
static final String KEY_USERNAME = "username";
static final String KEY_MAX_RETRY_TIMEOUT = "maxRetryTimeout";
static final String KEY_PREFIX = "prefix";
static final String KEY_SERVER = "server";
static final String KEY_NUMBER_OF_SHARDS = "numberOfShards";
static final String KEY_NUMBER_OF_REPLICAS = "numberOfReplicas";
static final String DEFAULT_PORT = "9200";
static final String DEFAULT_USERNAME = "elastic";
static final int DEFAULT_MAX_RETRY_TIMEOUT_MS = 30000;
static final int DEFAULT_NUMBER_OF_SHARDS = 5;
static final int DEFAULT_NUMBER_OF_REPLICAS = 1;
static final TimeUnit MAX_RETRY_TIMEOUT_UNIT = TimeUnit.MILLISECONDS;
private final Config cfg;
private final List<HttpHost> hosts;
final String username;
final String password;
final int maxRetryTimeout;
final int numberOfShards;
final int numberOfReplicas;
final String prefix;
@Inject
ElasticConfiguration(@GerritServerConfig Config cfg) {
this.cfg = cfg;
this.password = cfg.getString(SECTION_ELASTICSEARCH, null, KEY_PASSWORD);
this.username =
password == null
? null
: firstNonNull(
cfg.getString(SECTION_ELASTICSEARCH, null, KEY_USERNAME), DEFAULT_USERNAME);
this.maxRetryTimeout =
(int)
cfg.getTimeUnit(
SECTION_ELASTICSEARCH,
null,
KEY_MAX_RETRY_TIMEOUT,
DEFAULT_MAX_RETRY_TIMEOUT_MS,
MAX_RETRY_TIMEOUT_UNIT);
this.prefix = Strings.nullToEmpty(cfg.getString(SECTION_ELASTICSEARCH, null, KEY_PREFIX));
this.numberOfShards =
cfg.getInt(SECTION_ELASTICSEARCH, null, KEY_NUMBER_OF_SHARDS, DEFAULT_NUMBER_OF_SHARDS);
this.numberOfReplicas =
cfg.getInt(SECTION_ELASTICSEARCH, null, KEY_NUMBER_OF_REPLICAS, DEFAULT_NUMBER_OF_REPLICAS);
this.hosts = new ArrayList<>();
for (String server : cfg.getStringList(SECTION_ELASTICSEARCH, null, KEY_SERVER)) {
try {
URI uri = new URI(server);
int port = uri.getPort();
HttpHost httpHost =
new HttpHost(
uri.getHost(), port == -1 ? Integer.valueOf(DEFAULT_PORT) : port, uri.getScheme());
this.hosts.add(httpHost);
} catch (URISyntaxException | IllegalArgumentException e) {
logger.atSevere().log("Invalid server URI %s: %s", server, e.getMessage());
}
}
if (hosts.isEmpty()) {
throw new ProvisionException("No valid Elasticsearch servers configured");
}
logger.atInfo().log("Elasticsearch servers: %s", hosts);
}
Config getConfig() {
return cfg;
}
HttpHost[] getHosts() {
return hosts.toArray(new HttpHost[hosts.size()]);
}
String getIndexName(String name, int schemaVersion) {
return String.format("%s%s_%04d", prefix, name, schemaVersion);
}
}
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