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Get Settings API: Allow to retrieve (just) a specific index / indices…
… settings, closes #810.
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...main/java/org/elasticsearch/rest/action/admin/indices/settings/RestGetSettingsAction.java
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/* | ||
* Licensed to Elastic Search and Shay Banon under one | ||
* or more contributor license agreements. See the NOTICE file | ||
* distributed with this work for additional information | ||
* regarding copyright ownership. Elastic Search licenses this | ||
* file to you 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. | ||
*/ | ||
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package org.elasticsearch.rest.action.admin.indices.settings; | ||
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import org.elasticsearch.action.ActionListener; | ||
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest; | ||
import org.elasticsearch.action.admin.cluster.state.ClusterStateResponse; | ||
import org.elasticsearch.client.Client; | ||
import org.elasticsearch.client.Requests; | ||
import org.elasticsearch.cluster.metadata.IndexMetaData; | ||
import org.elasticsearch.cluster.metadata.MetaData; | ||
import org.elasticsearch.common.inject.Inject; | ||
import org.elasticsearch.common.settings.Settings; | ||
import org.elasticsearch.common.settings.SettingsFilter; | ||
import org.elasticsearch.common.xcontent.XContentBuilder; | ||
import org.elasticsearch.rest.*; | ||
import org.elasticsearch.rest.action.support.RestXContentBuilder; | ||
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import java.io.IOException; | ||
import java.util.Map; | ||
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import static org.elasticsearch.rest.RestRequest.Method.*; | ||
import static org.elasticsearch.rest.RestStatus.*; | ||
import static org.elasticsearch.rest.action.support.RestActions.*; | ||
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public class RestGetSettingsAction extends BaseRestHandler { | ||
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private final SettingsFilter settingsFilter; | ||
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@Inject public RestGetSettingsAction(Settings settings, Client client, RestController controller, SettingsFilter settingsFilter) { | ||
super(settings, client); | ||
controller.registerHandler(GET, "/_settings", this); | ||
controller.registerHandler(GET, "/{index}/_settings", this); | ||
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this.settingsFilter = settingsFilter; | ||
} | ||
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@Override public void handleRequest(final RestRequest request, final RestChannel channel) { | ||
final String[] indices = splitIndices(request.param("index")); | ||
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ClusterStateRequest clusterStateRequest = Requests.clusterStateRequest() | ||
.filterRoutingTable(true) | ||
.filterNodes(true) | ||
.filteredIndices(indices); | ||
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client.admin().cluster().state(clusterStateRequest, new ActionListener<ClusterStateResponse>() { | ||
@Override public void onResponse(ClusterStateResponse response) { | ||
try { | ||
MetaData metaData = response.state().metaData(); | ||
XContentBuilder builder = RestXContentBuilder.restContentBuilder(request); | ||
builder.startObject(); | ||
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for (IndexMetaData indexMetaData : metaData) { | ||
builder.startObject(indexMetaData.index()); | ||
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builder.startObject("settings"); | ||
Settings settings = settingsFilter.filterSettings(indexMetaData.settings()); | ||
for (Map.Entry<String, String> entry : settings.getAsMap().entrySet()) { | ||
builder.field(entry.getKey(), entry.getValue()); | ||
} | ||
builder.endObject(); | ||
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builder.endObject(); | ||
} | ||
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builder.endObject(); | ||
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channel.sendResponse(new XContentRestResponse(request, OK, builder)); | ||
} catch (Exception e) { | ||
onFailure(e); | ||
} | ||
} | ||
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@Override public void onFailure(Throwable e) { | ||
try { | ||
channel.sendResponse(new XContentThrowableRestResponse(request, e)); | ||
} catch (IOException e1) { | ||
logger.error("Failed to send failure response", e1); | ||
} | ||
} | ||
}); | ||
} | ||
} |