| // 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 com.google.gson.JsonElement; |
| import com.google.gson.JsonObject; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import io.searchbox.client.JestResult; |
| import io.searchbox.client.http.JestHttpClient; |
| import io.searchbox.indices.aliases.GetAliases; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map.Entry; |
| |
| @Singleton |
| class ElasticIndexVersionDiscovery { |
| private final JestHttpClient client; |
| |
| @Inject |
| ElasticIndexVersionDiscovery(JestClientBuilder clientBuilder) { |
| this.client = clientBuilder.build(); |
| } |
| |
| List<String> discover(String prefix, String indexName) throws IOException { |
| String name = prefix + indexName + "_"; |
| JestResult result = client.execute(new GetAliases.Builder().addIndex(name + "*").build()); |
| if (result.isSucceeded()) { |
| JsonObject object = result.getJsonObject().getAsJsonObject(); |
| List<String> versions = new ArrayList<>(object.size()); |
| for (Entry<String, JsonElement> entry : object.entrySet()) { |
| versions.add(entry.getKey().replace(name, "")); |
| } |
| return versions; |
| } |
| return Collections.emptyList(); |
| } |
| } |