github.com/danp/terraform@v0.9.5-0.20170426144147-39d740081351/builtin/providers/consul/key_client.go (about)

     1  package consul
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  
     7  	consulapi "github.com/hashicorp/consul/api"
     8  )
     9  
    10  // keyClient is a wrapper around the upstream Consul client that is
    11  // specialized for Terraform's manipulations of the key/value store.
    12  type keyClient struct {
    13  	client *consulapi.KV
    14  	qOpts  *consulapi.QueryOptions
    15  	wOpts  *consulapi.WriteOptions
    16  }
    17  
    18  func newKeyClient(realClient *consulapi.KV, dc, token string) *keyClient {
    19  	qOpts := &consulapi.QueryOptions{Datacenter: dc, Token: token}
    20  	wOpts := &consulapi.WriteOptions{Datacenter: dc, Token: token}
    21  
    22  	return &keyClient{
    23  		client: realClient,
    24  		qOpts:  qOpts,
    25  		wOpts:  wOpts,
    26  	}
    27  }
    28  
    29  func (c *keyClient) Get(path string) (string, error) {
    30  	log.Printf(
    31  		"[DEBUG] Reading key '%s' in %s",
    32  		path, c.qOpts.Datacenter,
    33  	)
    34  	pair, _, err := c.client.Get(path, c.qOpts)
    35  	if err != nil {
    36  		return "", fmt.Errorf("Failed to read Consul key '%s': %s", path, err)
    37  	}
    38  	value := ""
    39  	if pair != nil {
    40  		value = string(pair.Value)
    41  	}
    42  	return value, nil
    43  }
    44  
    45  func (c *keyClient) GetUnderPrefix(pathPrefix string) (map[string]string, error) {
    46  	log.Printf(
    47  		"[DEBUG] Listing keys under '%s' in %s",
    48  		pathPrefix, c.qOpts.Datacenter,
    49  	)
    50  	pairs, _, err := c.client.List(pathPrefix, c.qOpts)
    51  	if err != nil {
    52  		return nil, fmt.Errorf(
    53  			"Failed to list Consul keys under prefix '%s': %s", pathPrefix, err,
    54  		)
    55  	}
    56  	value := map[string]string{}
    57  	for _, pair := range pairs {
    58  		subKey := pair.Key[len(pathPrefix):]
    59  		value[subKey] = string(pair.Value)
    60  	}
    61  	return value, nil
    62  }
    63  
    64  func (c *keyClient) Put(path, value string) error {
    65  	log.Printf(
    66  		"[DEBUG] Setting key '%s' to '%v' in %s",
    67  		path, value, c.wOpts.Datacenter,
    68  	)
    69  	pair := consulapi.KVPair{Key: path, Value: []byte(value)}
    70  	if _, err := c.client.Put(&pair, c.wOpts); err != nil {
    71  		return fmt.Errorf("Failed to write Consul key '%s': %s", path, err)
    72  	}
    73  	return nil
    74  }
    75  
    76  func (c *keyClient) Delete(path string) error {
    77  	log.Printf(
    78  		"[DEBUG] Deleting key '%s' in %s",
    79  		path, c.wOpts.Datacenter,
    80  	)
    81  	if _, err := c.client.Delete(path, c.wOpts); err != nil {
    82  		return fmt.Errorf("Failed to delete Consul key '%s': %s", path, err)
    83  	}
    84  	return nil
    85  }
    86  
    87  func (c *keyClient) DeleteUnderPrefix(pathPrefix string) error {
    88  	log.Printf(
    89  		"[DEBUG] Deleting all keys under prefix '%s' in %s",
    90  		pathPrefix, c.wOpts.Datacenter,
    91  	)
    92  	if _, err := c.client.DeleteTree(pathPrefix, c.wOpts); err != nil {
    93  		return fmt.Errorf("Failed to delete Consul keys under '%s': %s", pathPrefix, err)
    94  	}
    95  	return nil
    96  }