github.com/hack0072008/kafka-go@v1.0.1/createpartitions.go (about)

     1  package kafka
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  	"net"
     7  	"time"
     8  
     9  	"github.com/hack0072008/kafka-go/protocol/createpartitions"
    10  )
    11  
    12  // CreatePartitionsRequest represents a request sent to a kafka broker to create
    13  // and update topic parititions.
    14  type CreatePartitionsRequest struct {
    15  	// Address of the kafka broker to send the request to.
    16  	Addr net.Addr
    17  
    18  	// List of topics to create and their configuration.
    19  	Topics []TopicPartitionsConfig
    20  
    21  	// When set to true, topics are not created but the configuration is
    22  	// validated as if they were.
    23  	ValidateOnly bool
    24  }
    25  
    26  // CreatePartitionsResponse represents a response from a kafka broker to a partition
    27  // creation request.
    28  type CreatePartitionsResponse struct {
    29  	// The amount of time that the broker throttled the request.
    30  	Throttle time.Duration
    31  
    32  	// Mapping of topic names to errors that occurred while attempting to create
    33  	// the topics.
    34  	//
    35  	// The errors contain the kafka error code. Programs may use the standard
    36  	// errors.Is function to test the error against kafka error codes.
    37  	Errors map[string]error
    38  }
    39  
    40  // CreatePartitions sends a partitions creation request to a kafka broker and returns the
    41  // response.
    42  func (c *Client) CreatePartitions(ctx context.Context, req *CreatePartitionsRequest) (*CreatePartitionsResponse, error) {
    43  	topics := make([]createpartitions.RequestTopic, len(req.Topics))
    44  
    45  	for i, t := range req.Topics {
    46  		topics[i] = createpartitions.RequestTopic{
    47  			Name:        t.Name,
    48  			Count:       t.Count,
    49  			Assignments: t.assignments(),
    50  		}
    51  	}
    52  
    53  	m, err := c.roundTrip(ctx, req.Addr, &createpartitions.Request{
    54  		Topics:       topics,
    55  		TimeoutMs:    c.timeoutMs(ctx, defaultCreatePartitionsTimeout),
    56  		ValidateOnly: req.ValidateOnly,
    57  	})
    58  
    59  	if err != nil {
    60  		return nil, fmt.Errorf("kafka.(*Client).CreatePartitions: %w", err)
    61  	}
    62  
    63  	res := m.(*createpartitions.Response)
    64  	ret := &CreatePartitionsResponse{
    65  		Throttle: makeDuration(res.ThrottleTimeMs),
    66  		Errors:   make(map[string]error, len(res.Results)),
    67  	}
    68  
    69  	for _, t := range res.Results {
    70  		ret.Errors[t.Name] = makeError(t.ErrorCode, t.ErrorMessage)
    71  	}
    72  
    73  	return ret, nil
    74  }
    75  
    76  type TopicPartitionsConfig struct {
    77  	// Topic name
    78  	Name string
    79  
    80  	// Topic partition's count.
    81  	Count int32
    82  
    83  	// TopicPartitionAssignments among kafka brokers for this topic partitions.
    84  	TopicPartitionAssignments []TopicPartitionAssignment
    85  }
    86  
    87  func (t *TopicPartitionsConfig) assignments() []createpartitions.RequestAssignment {
    88  	if len(t.TopicPartitionAssignments) == 0 {
    89  		return nil
    90  	}
    91  	assignments := make([]createpartitions.RequestAssignment, len(t.TopicPartitionAssignments))
    92  	for i, a := range t.TopicPartitionAssignments {
    93  		assignments[i] = createpartitions.RequestAssignment{
    94  			BrokerIDs: a.BrokerIDs,
    95  		}
    96  	}
    97  	return assignments
    98  }
    99  
   100  type TopicPartitionAssignment struct {
   101  	// Broker IDs
   102  	BrokerIDs []int32
   103  }