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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 java.util.stream.Collectors.toList;
import com.google.gson.JsonParser;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.List;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.elasticsearch.client.Request;
import org.elasticsearch.client.Response;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Singleton
class ElasticIndexVersionDiscovery {
private static final Logger log = LoggerFactory.getLogger(ElasticIndexVersionDiscovery.class);
private final ElasticRestClientProvider client;
@Inject
ElasticIndexVersionDiscovery(ElasticRestClientProvider client) {
this.client = client;
}
List<String> discover(String prefix, String indexName) throws IOException {
String name = prefix + indexName + "_";
Request request = new Request("GET", client.adapter().getVersionDiscoveryUrl(name));
Response response = client.get().performRequest(request);
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() != HttpStatus.SC_OK) {
String message =
String.format(
"Failed to discover index versions for %s: %d: %s",
name, statusLine.getStatusCode(), statusLine.getReasonPhrase());
log.error(message);
throw new IOException(message);
}
return new JsonParser()
.parse(AbstractElasticIndex.getContent(response)).getAsJsonObject().entrySet().stream()
.map(e -> e.getKey().replace(name, ""))
.collect(toList());
}
}
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