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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.rest.action.cat;
import com.carrotsearch.hppc.ObjectLongHashMap;
import com.carrotsearch.hppc.ObjectLongMap;
import org.elasticsearch.action.admin.cluster.node.stats.NodeStats;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsRequest;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Table;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.action.support.RestResponseListener;
import org.elasticsearch.rest.action.support.RestTable;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import static org.elasticsearch.rest.RestRequest.Method.GET;
/**
* Cat API class to display information about the size of fielddata fields per node
*/
public class RestFielddataAction extends AbstractCatAction {
@Inject
public RestFielddataAction(Settings settings, RestController controller, Client client) {
super(settings, controller, client);
controller.registerHandler(GET, "/_cat/fielddata", this);
controller.registerHandler(GET, "/_cat/fielddata/{fields}", this);
}
@Override
protected void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
final NodesStatsRequest nodesStatsRequest = new NodesStatsRequest("data:true");
nodesStatsRequest.clear();
nodesStatsRequest.indices(true);
String[] fields = request.paramAsStringArray("fields", null);
nodesStatsRequest.indices().fieldDataFields(fields == null ? new String[] {"*"} : fields);
client.admin().cluster().nodesStats(nodesStatsRequest, new RestResponseListener<NodesStatsResponse>(channel) {
@Override
public RestResponse buildResponse(NodesStatsResponse nodeStatses) throws Exception {
return RestTable.buildResponse(buildTable(request, nodeStatses), channel);
}
});
}
@Override
protected void documentation(StringBuilder sb) {
sb.append("/_cat/fielddata\n");
sb.append("/_cat/fielddata/{fields}\n");
}
@Override
protected Table getTableWithHeader(RestRequest request) {
Table table = new Table();
table.startHeaders()
.addCell("id", "desc:node id")
.addCell("host", "alias:h;desc:host name")
.addCell("ip", "desc:ip address")
.addCell("node", "alias:n;desc:node name")
.addCell("total", "text-align:right;desc:total field data usage")
.endHeaders();
return table;
}
private Table buildTable(final RestRequest request, final NodesStatsResponse nodeStatses) {
Set<String> fieldNames = new HashSet<>();
Map<NodeStats, ObjectLongMap<String>> nodesFields = new HashMap<>();
// Collect all the field names so a new table can be built
for (NodeStats ns : nodeStatses.getNodes()) {
ObjectLongHashMap<String> fields = ns.getIndices().getFieldData().getFields();
nodesFields.put(ns, fields);
if (fields != null) {
for (String key : fields.keys().toArray(String.class)) {
fieldNames.add(key);
}
}
}
// The table must be rebuilt because it has dynamic headers based on the fields
Table table = new Table();
table.startHeaders()
.addCell("id", "desc:node id")
.addCell("host", "alias:h;desc:host name")
.addCell("ip", "desc:ip address")
.addCell("node", "alias:n;desc:node name")
.addCell("total", "text-align:right;desc:total field data usage");
// The table columns must be built dynamically since the number of fields is unknown
for (String fieldName : fieldNames) {
table.addCell(fieldName, "text-align:right;desc:" + fieldName + " field");
}
table.endHeaders();
for (Map.Entry<NodeStats, ObjectLongMap<String>> statsEntry : nodesFields.entrySet()) {
table.startRow();
// add the node info and field data total before each individual field
NodeStats ns = statsEntry.getKey();
table.addCell(ns.getNode().id());
table.addCell(ns.getNode().getHostName());
table.addCell(ns.getNode().getHostAddress());
table.addCell(ns.getNode().getName());
table.addCell(ns.getIndices().getFieldData().getMemorySize());
ObjectLongMap<String> fields = statsEntry.getValue();
for (String fieldName : fieldNames) {
table.addCell(new ByteSizeValue(fields == null ? 0L : fields.getOrDefault(fieldName, 0L)));
}
table.endRow();
}
return table;
}
}
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