github.com/angenalZZZ/gofunc@v0.0.0-20210507121333-48ff1be3917b/data/queue/example_object_test.go (about)

     1  package queue_test
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"github.com/angenalZZZ/gofunc/data/queue"
     7  )
     8  
     9  // ExampleObject demonstrates enqueuing a struct object.
    10  func Example_object() {
    11  	// Open/create a queue.
    12  	q, err := queue.OpenQueue("data_dir")
    13  	if err != nil {
    14  		fmt.Println(err)
    15  		return
    16  	}
    17  	defer q.Close()
    18  
    19  	// Define our struct.
    20  	type object struct {
    21  		X int
    22  		Y int
    23  	}
    24  
    25  	// Enqueue an object.
    26  	item, err := q.EnqueueObject(object{X: 1, Y: 2})
    27  	if err != nil {
    28  		fmt.Println(err)
    29  		return
    30  	}
    31  
    32  	fmt.Println(item.ID)  // 1
    33  	fmt.Println(item.Key) // [0 0 0 0 0 0 0 1]
    34  
    35  	// Dequeue an item.
    36  	deqItem, err := q.Dequeue()
    37  	if err != nil {
    38  		fmt.Println(err)
    39  		return
    40  	}
    41  
    42  	// Create variable to hold our object in.
    43  	var obj object
    44  
    45  	// Decode item into our struct type.
    46  	if err := deqItem.ToObject(&obj); err != nil {
    47  		fmt.Println(err)
    48  		return
    49  	}
    50  
    51  	fmt.Printf("%+v\n", obj) // {X:1 Y:2}
    52  
    53  	// Delete the queue and its database.
    54  	q.Drop()
    55  }