go.temporal.io/server@v1.23.0/common/tasks/priority.go (about)

     1  // The MIT License
     2  //
     3  // Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
     4  //
     5  // Copyright (c) 2020 Uber Technologies, Inc.
     6  //
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     8  // of this software and associated documentation files (the "Software"), to deal
     9  // in the Software without restriction, including without limitation the rights
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    11  // copies of the Software, and to permit persons to whom the Software is
    12  // furnished to do so, subject to the following conditions:
    13  //
    14  // The above copyright notice and this permission notice shall be included in
    15  // all copies or substantial portions of the Software.
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    17  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    18  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    19  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    20  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    21  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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    23  // THE SOFTWARE.
    24  
    25  package tasks
    26  
    27  import "strconv"
    28  
    29  type (
    30  	Priority int
    31  )
    32  
    33  const (
    34  	numBitsPerLevel = 3
    35  )
    36  
    37  const (
    38  	highPriorityClass Priority = iota << numBitsPerLevel
    39  	mediumPriorityClass
    40  	lowPriorityClass
    41  )
    42  
    43  const (
    44  	highPrioritySubclass Priority = iota
    45  	mediumPrioritySubclass
    46  	lowPrioritySubclass
    47  )
    48  
    49  var (
    50  	PriorityHigh = getPriority(highPriorityClass, mediumPrioritySubclass)
    51  	PriorityLow  = getPriority(lowPriorityClass, mediumPrioritySubclass)
    52  )
    53  
    54  var (
    55  	PriorityName = map[Priority]string{
    56  		PriorityHigh: "high",
    57  		PriorityLow:  "low",
    58  	}
    59  
    60  	PriorityValue = map[string]Priority{
    61  		"high": PriorityHigh,
    62  		"low":  PriorityLow,
    63  	}
    64  )
    65  
    66  func (p Priority) String() string {
    67  	s, ok := PriorityName[p]
    68  	if ok {
    69  		return s
    70  	}
    71  	return strconv.Itoa(int(p))
    72  }
    73  
    74  func getPriority(
    75  	class, subClass Priority,
    76  ) Priority {
    77  	return class | subClass
    78  }