gitee.com/go-spring2/spring-base@v1.1.3/atomic/time.go (about)

     1  /*
     2   * Copyright 2012-2019 the original author or authors.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *      https://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package atomic
    18  
    19  import (
    20  	"sync/atomic"
    21  	"time"
    22  
    23  	"gitee.com/go-spring2/spring-base/json"
    24  )
    25  
    26  type MarshalTime func(time.Time) ([]byte, error)
    27  
    28  // A Time is an atomic time.Time value.
    29  type Time struct {
    30  	_ nocopy
    31  	v atomic.Value
    32  
    33  	marshalJSON MarshalTime
    34  }
    35  
    36  // Load atomically loads and returns the value stored in x.
    37  func (x *Time) Load() time.Time {
    38  	if x, ok := x.v.Load().(time.Time); ok {
    39  		return x
    40  	}
    41  	return time.Time{}
    42  }
    43  
    44  // Store atomically stores val into x.
    45  func (x *Time) Store(val time.Time) {
    46  	x.v.Store(val)
    47  }
    48  
    49  // SetMarshalJSON sets the JSON encoding handler for x.
    50  func (x *Time) SetMarshalJSON(fn MarshalTime) {
    51  	x.marshalJSON = fn
    52  }
    53  
    54  // MarshalJSON returns the JSON encoding of x.
    55  func (x *Time) MarshalJSON() ([]byte, error) {
    56  	if x.marshalJSON != nil {
    57  		return x.marshalJSON(x.Load())
    58  	}
    59  	return json.Marshal(x.Load().Format(time.UnixDate))
    60  }