github.com/pingcap/ticdc@v0.0.0-20220526033649-485a10ef2652/tests/dailytest/data.go (about)

     1  // Copyright 2020 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package dailytest
    15  
    16  import (
    17  	"fmt"
    18  	"sync"
    19  	"time"
    20  )
    21  
    22  var defaultStep int64 = 1
    23  
    24  type datum struct {
    25  	sync.Mutex
    26  
    27  	intValue    int64
    28  	minIntValue int64
    29  	maxIntValue int64
    30  	timeValue   time.Time
    31  	step        int64
    32  
    33  	init     bool
    34  	useRange bool
    35  }
    36  
    37  func newDatum() *datum {
    38  	return &datum{intValue: -1, step: 1}
    39  }
    40  
    41  func (d *datum) setInitInt64Value(step int64, min int64, max int64) {
    42  	d.Lock()
    43  	defer d.Unlock()
    44  
    45  	if d.init {
    46  		return
    47  	}
    48  
    49  	d.step = step
    50  
    51  	if min != -1 {
    52  		d.minIntValue = min
    53  		d.intValue = min
    54  	}
    55  
    56  	if min < max {
    57  		d.maxIntValue = max
    58  		d.useRange = true
    59  	}
    60  
    61  	d.init = true
    62  }
    63  
    64  func (d *datum) uniqInt64() int64 {
    65  	d.Lock()
    66  	defer d.Unlock()
    67  
    68  	data := d.intValue
    69  	if d.useRange {
    70  		if d.intValue+d.step > d.maxIntValue {
    71  			return data
    72  		}
    73  	}
    74  
    75  	d.intValue += d.step
    76  	return data
    77  }
    78  
    79  func (d *datum) uniqString(n int) string {
    80  	d.Lock()
    81  	d.intValue++
    82  	data := d.intValue
    83  	d.Unlock()
    84  
    85  	var value []byte
    86  	for ; ; n-- {
    87  		if n == 0 {
    88  			break
    89  		}
    90  
    91  		idx := data % int64(len(alphabet))
    92  		data = data / int64(len(alphabet))
    93  
    94  		value = append(value, alphabet[idx])
    95  
    96  		if data == 0 {
    97  			break
    98  		}
    99  	}
   100  
   101  	for i, j := 0, len(value)-1; i < j; i, j = i+1, j-1 {
   102  		value[i], value[j] = value[j], value[i]
   103  	}
   104  
   105  	return string(value)
   106  }
   107  
   108  func (d *datum) uniqTime() string {
   109  	d.Lock()
   110  	defer d.Unlock()
   111  
   112  	if d.timeValue.IsZero() {
   113  		d.timeValue = time.Now()
   114  	} else {
   115  		d.timeValue = d.timeValue.Add(time.Duration(d.step) * time.Second)
   116  	}
   117  
   118  	return fmt.Sprintf("%02d:%02d:%02d", d.timeValue.Hour(), d.timeValue.Minute(), d.timeValue.Second())
   119  }
   120  
   121  func (d *datum) uniqDate() string {
   122  	d.Lock()
   123  	defer d.Unlock()
   124  
   125  	if d.timeValue.IsZero() {
   126  		d.timeValue = time.Now()
   127  	} else {
   128  		d.timeValue = d.timeValue.AddDate(0, 0, int(d.step))
   129  	}
   130  
   131  	return fmt.Sprintf("%04d-%02d-%02d", d.timeValue.Year(), d.timeValue.Month(), d.timeValue.Day())
   132  }
   133  
   134  func (d *datum) uniqTimestamp() string {
   135  	d.Lock()
   136  	defer d.Unlock()
   137  
   138  	if d.timeValue.IsZero() {
   139  		d.timeValue = time.Now()
   140  	} else {
   141  		d.timeValue = d.timeValue.Add(time.Duration(d.step) * time.Second)
   142  	}
   143  
   144  	return fmt.Sprintf("%04d-%02d-%02d %02d:%02d:%02d",
   145  		d.timeValue.Year(), d.timeValue.Month(), d.timeValue.Day(),
   146  		d.timeValue.Hour(), d.timeValue.Minute(), d.timeValue.Second())
   147  }
   148  
   149  func (d *datum) uniqYear() string {
   150  	d.Lock()
   151  	defer d.Unlock()
   152  
   153  	if d.timeValue.IsZero() {
   154  		d.timeValue = time.Now()
   155  	} else {
   156  		d.timeValue = d.timeValue.AddDate(int(d.step), 0, 0)
   157  	}
   158  
   159  	return fmt.Sprintf("%04d", d.timeValue.Year())
   160  }