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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 org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse;
import org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.Table;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.time.DateFormatter;
import org.elasticsearch.common.time.DateFormatters;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.action.RestResponseListener;
import org.elasticsearch.tasks.TaskInfo;
import java.time.Instant;
import java.time.ZoneOffset;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Supplier;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.action.admin.cluster.RestListTasksAction.generateListTasksRequest;
public class RestTasksAction extends AbstractCatAction {
private final Supplier nodesInCluster;
public RestTasksAction(Settings settings, RestController controller, Supplier nodesInCluster) {
super(settings);
controller.registerHandler(GET, "/_cat/tasks", this);
this.nodesInCluster = nodesInCluster;
}
@Override
public String getName() {
return "cat_tasks_action";
}
@Override
protected void documentation(StringBuilder sb) {
sb.append("/_cat/tasks\n");
}
@Override
public RestChannelConsumer doCatRequest(final RestRequest request, final NodeClient client) {
return channel ->
client.admin().cluster().listTasks(generateListTasksRequest(request), new RestResponseListener(channel) {
@Override
public RestResponse buildResponse(ListTasksResponse listTasksResponse) throws Exception {
return RestTable.buildResponse(buildTable(request, listTasksResponse), channel);
}
});
}
private static final Set RESPONSE_PARAMS;
static {
final Set responseParams = new HashSet<>();
responseParams.add("detailed");
responseParams.addAll(AbstractCatAction.RESPONSE_PARAMS);
RESPONSE_PARAMS = Collections.unmodifiableSet(responseParams);
}
@Override
protected Set responseParams() {
return RESPONSE_PARAMS;
}
@Override
protected Table getTableWithHeader(final RestRequest request) {
boolean detailed = request.paramAsBoolean("detailed", false);
Table table = new Table();
table.startHeaders();
// Task main info
table.addCell("id", "default:false;desc:id of the task with the node");
table.addCell("action", "alias:ac;desc:task action");
table.addCell("task_id", "alias:ti;desc:unique task id");
table.addCell("parent_task_id", "alias:pti;desc:parent task id");
table.addCell("type", "alias:ty;desc:task type");
table.addCell("start_time", "alias:start;desc:start time in ms");
table.addCell("timestamp", "alias:ts,hms,hhmmss;desc:start time in HH:MM:SS");
table.addCell("running_time_ns", "default:false;alias:time;desc:running time ns");
table.addCell("running_time", "default:true;alias:time;desc:running time");
// Node info
table.addCell("node_id", "default:false;alias:ni;desc:unique node id");
table.addCell("ip", "default:true;alias:i;desc:ip address");
table.addCell("port", "default:false;alias:po;desc:bound transport port");
table.addCell("node", "default:true;alias:n;desc:node name");
table.addCell("version", "default:false;alias:v;desc:es version");
// Task detailed info
if (detailed) {
table.addCell("description", "default:true;alias:desc;desc:task action");
}
table.endHeaders();
return table;
}
private static final DateFormatter FORMATTER = DateFormatters.forPattern("HH:mm:ss").withZone(ZoneOffset.UTC);
private void buildRow(Table table, boolean fullId, boolean detailed, DiscoveryNodes discoveryNodes, TaskInfo taskInfo) {
table.startRow();
String nodeId = taskInfo.getTaskId().getNodeId();
DiscoveryNode node = discoveryNodes.get(nodeId);
table.addCell(taskInfo.getId());
table.addCell(taskInfo.getAction());
table.addCell(taskInfo.getTaskId().toString());
if (taskInfo.getParentTaskId().isSet()) {
table.addCell(taskInfo.getParentTaskId().toString());
} else {
table.addCell("-");
}
table.addCell(taskInfo.getType());
table.addCell(taskInfo.getStartTime());
table.addCell(FORMATTER.format(Instant.ofEpochMilli(taskInfo.getStartTime())));
table.addCell(taskInfo.getRunningTimeNanos());
table.addCell(TimeValue.timeValueNanos(taskInfo.getRunningTimeNanos()).toString());
// Node information. Note that the node may be null because it has left the cluster between when we got this response and now.
table.addCell(fullId ? nodeId : Strings.substring(nodeId, 0, 4));
table.addCell(node == null ? "-" : node.getHostAddress());
table.addCell(node.getAddress().address().getPort());
table.addCell(node == null ? "-" : node.getName());
table.addCell(node == null ? "-" : node.getVersion().toString());
if (detailed) {
table.addCell(taskInfo.getDescription());
}
table.endRow();
}
private void buildGroups(Table table, boolean fullId, boolean detailed, List taskGroups) {
DiscoveryNodes discoveryNodes = nodesInCluster.get();
List sortedGroups = new ArrayList<>(taskGroups);
sortedGroups.sort((o1, o2) -> Long.compare(o1.getTaskInfo().getStartTime(), o2.getTaskInfo().getStartTime()));
for (TaskGroup taskGroup : sortedGroups) {
buildRow(table, fullId, detailed, discoveryNodes, taskGroup.getTaskInfo());
buildGroups(table, fullId, detailed, taskGroup.getChildTasks());
}
}
private Table buildTable(RestRequest request, ListTasksResponse listTasksResponse) {
boolean fullId = request.paramAsBoolean("full_id", false);
boolean detailed = request.paramAsBoolean("detailed", false);
Table table = getTableWithHeader(request);
buildGroups(table, fullId, detailed, listTasksResponse.getTaskGroups());
return table;
}
}