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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
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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.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.settings.Settings;
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.io.IOException;
import java.util.List;
import java.util.function.Consumer;
import static org.elasticsearch.common.unit.TimeValue.timeValueSeconds;
public class TransportListTasksAction extends TransportTasksAction<Task, ListTasksRequest, ListTasksResponse, TaskInfo> {
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(Settings settings, ThreadPool threadPool, ClusterService clusterService,
TransportService transportService, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, ListTasksAction.NAME, threadPool, clusterService, transportService, actionFilters, indexNameExpressionResolver,
ListTasksRequest::new, ListTasksResponse::new, ThreadPool.Names.MANAGEMENT);
}
@Override
protected ListTasksResponse newResponse(ListTasksRequest request, List<TaskInfo> tasks,
List<TaskOperationFailure> taskOperationFailures, List<FailedNodeException> failedNodeExceptions) {
return new ListTasksResponse(tasks, taskOperationFailures, failedNodeExceptions);
}
@Override
protected TaskInfo readTaskResponse(StreamInput in) throws IOException {
return new TaskInfo(in);
}
@Override
protected void taskOperation(ListTasksRequest request, Task task, ActionListener<TaskInfo> listener) {
listener.onResponse(task.taskInfo(clusterService.localNode().getId(), request.getDetailed()));
}
@Override
protected void processTasks(ListTasksRequest request, Consumer<Task> 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);
}
@Override
protected boolean accumulateExceptions() {
return true;
}
}