org.elasticsearch.action.admin.cluster.node.tasks.list.TransportListTasksAction Maven / Gradle / Ivy

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/*
 * 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.action.admin.cluster.node.tasks.list;

import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.FailedNodeException;
import org.elasticsearch.action.TaskOperationFailure;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.tasks.TransportTasksAction;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.tasks.TaskInfo;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import java.util.List;
import java.util.function.Consumer;

import static org.elasticsearch.common.unit.TimeValue.timeValueSeconds;

public class TransportListTasksAction extends TransportTasksAction {
    public static long waitForCompletionTimeout(TimeValue timeout) {
        if (timeout == null) {
            timeout = DEFAULT_WAIT_FOR_COMPLETION_TIMEOUT;
        }
        return System.nanoTime() + timeout.nanos();
    }

    private static final TimeValue DEFAULT_WAIT_FOR_COMPLETION_TIMEOUT = timeValueSeconds(30);

    @Inject
    public TransportListTasksAction(ClusterService clusterService, TransportService transportService, ActionFilters actionFilters) {
        super(ListTasksAction.NAME, clusterService, transportService, actionFilters,
            ListTasksRequest::new, ListTasksResponse::new, TaskInfo::new, ThreadPool.Names.MANAGEMENT);
    }

    @Override
    protected ListTasksResponse newResponse(ListTasksRequest request, List tasks,
            List taskOperationFailures, List failedNodeExceptions) {
        return new ListTasksResponse(tasks, taskOperationFailures, failedNodeExceptions);
    }

    @Override
    protected void taskOperation(ListTasksRequest request, Task task, ActionListener listener) {
        listener.onResponse(task.taskInfo(clusterService.localNode().getId(), request.getDetailed()));
    }

    @Override
    protected void processTasks(ListTasksRequest request, Consumer operation) {
        if (request.getWaitForCompletion()) {
            long timeoutNanos = waitForCompletionTimeout(request.getTimeout());
            operation = operation.andThen(task -> {
                if (task.getAction().startsWith(ListTasksAction.NAME)) {
                    // It doesn't make sense to wait for List Tasks and it can cause an infinite loop of the task waiting
                    // for itself or one of its child tasks
                    return;
                }
                taskManager.waitForTaskCompletion(task, timeoutNanos);
            });
        }
        super.processTasks(request, operation);
    }

}