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minio/pkg/tasker/commands.go

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2.0 KiB

/*
* Minio Cloud Storage, (C) 2015 Minio, Inc.
*
* Licensed 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 tasker
// Command is number that uniquely identifies a command function.
type Command uint8
// Enumerate the task commands.
const (
// CmdNOOP does nothing. It is a default placeholder. Uninitialized variable of this type will point to NOOP command by default.
CmdNOOP Command = iota
// CmdSignalEnd gracefully ends current task. Never ending tasks (loop over) or Batched jobs will not take the next iteration,
// but may finish the current state to completion.
CmdSignalEnd
// CmdSignalAbort ends the current task at hand immediately. It may still cleanup dangling issues quickly.
CmdSignalAbort
// CmdSignalSuspend suspends the current task.
CmdSignalSuspend
// CmdSignalResume resumes a suspended task.
CmdSignalResume
// CmdPriorityLow is optimized to conserve resources and complete the task at a slow pace. This option is ideal for batch processed tasks.
CmdPriorityLow
// CmdPriorityMedium is the default priority. It is a balanced option between resources and speed.
CmdPriorityMedium
// CmdPriorityHigh is optimized for speed. This option is ideal for short lived tasks (like meta-data related) that are latency sensitive. Use this option wisely.
CmdPriorityHigh
// CmdPrioritySuper is an exclusive priority. All tasks with priority lower than Super (including High) are paused
// temporarily until this task completes. Anytime you consider using this priority level, please seek for approval.
CmdPrioritySuper
)