github.com/subuk/terraform@v0.6.14-0.20160317140351-de1567c2e732/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) Put(path, value string) error {
    46  	log.Printf(
    47  		"[DEBUG] Setting key '%s' to '%v' in %s",
    48  		path, value, c.wOpts.Datacenter,
    49  	)
    50  	pair := consulapi.KVPair{Key: path, Value: []byte(value)}
    51  	if _, err := c.client.Put(&pair, c.wOpts); err != nil {
    52  		return fmt.Errorf("Failed to write Consul key '%s': %s", path, err)
    53  	}
    54  	return nil
    55  }
    56  
    57  func (c *keyClient) Delete(path string) error {
    58  	log.Printf(
    59  		"[DEBUG] Deleting key '%s' in %s",
    60  		path, c.wOpts.Datacenter,
    61  	)
    62  	if _, err := c.client.Delete(path, c.wOpts); err != nil {
    63  		return fmt.Errorf("Failed to delete Consul key '%s': %s", path, err)
    64  	}
    65  	return nil
    66  }