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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.rest.action.cat;
import org.elasticsearch.action.admin.indices.alias.get.GetAliasesRequest;
import org.elasticsearch.action.admin.indices.alias.get.GetAliasesResponse;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.internal.node.NodeClient;
import org.elasticsearch.cluster.metadata.AliasMetadata;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.Table;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.action.RestResponseListener;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestAliasAction extends AbstractCatAction {
@Override
public List routes() {
return List.of(new Route(GET, "/_cat/aliases"), new Route(GET, "/_cat/aliases/{alias}"));
}
@Override
public String getName() {
return "cat_alias_action";
}
@Override
public boolean allowSystemIndexAccessByDefault() {
return true;
}
@Override
protected RestChannelConsumer doCatRequest(final RestRequest request, final NodeClient client) {
final GetAliasesRequest getAliasesRequest = request.hasParam("alias")
? new GetAliasesRequest(Strings.commaDelimitedListToStringArray(request.param("alias")))
: new GetAliasesRequest();
getAliasesRequest.indicesOptions(IndicesOptions.fromRequest(request, getAliasesRequest.indicesOptions()));
getAliasesRequest.local(request.paramAsBoolean("local", getAliasesRequest.local()));
return channel -> client.admin().indices().getAliases(getAliasesRequest, new RestResponseListener(channel) {
@Override
public RestResponse buildResponse(GetAliasesResponse response) throws Exception {
Table tab = buildTable(request, response);
return RestTable.buildResponse(tab, channel);
}
});
}
@Override
protected void documentation(StringBuilder sb) {
sb.append("/_cat/aliases\n");
sb.append("/_cat/aliases/{alias}\n");
}
@Override
protected Table getTableWithHeader(RestRequest request) {
final Table table = new Table();
table.startHeaders();
table.addCell("alias", "alias:a;desc:alias name");
table.addCell("index", "alias:i,idx;desc:index alias points to");
table.addCell("filter", "alias:f,fi;desc:filter");
table.addCell("routing.index", "alias:ri,routingIndex;desc:index routing");
table.addCell("routing.search", "alias:rs,routingSearch;desc:search routing");
table.addCell("is_write_index", "alias:w,isWriteIndex;desc:write index");
table.endHeaders();
return table;
}
private Table buildTable(RestRequest request, GetAliasesResponse response) {
Table table = getTableWithHeader(request);
for (Map.Entry> cursor : response.getAliases().entrySet()) {
String indexName = cursor.getKey();
for (AliasMetadata aliasMetadata : cursor.getValue()) {
table.startRow();
table.addCell(aliasMetadata.alias());
table.addCell(indexName);
table.addCell(aliasMetadata.filteringRequired() ? "*" : "-");
String indexRouting = Strings.hasLength(aliasMetadata.indexRouting()) ? aliasMetadata.indexRouting() : "-";
table.addCell(indexRouting);
String searchRouting = Strings.hasLength(aliasMetadata.searchRouting()) ? aliasMetadata.searchRouting() : "-";
table.addCell(searchRouting);
String isWriteIndex = aliasMetadata.writeIndex() == null ? "-" : aliasMetadata.writeIndex().toString();
table.addCell(isWriteIndex);
table.endRow();
}
}
return table;
}
}