github.com/sym3tri/etcd@v0.2.1-0.20140422215517-a563d82f95d6/store/v2/command_factory.go (about)

     1  package v2
     2  
     3  import (
     4  	"time"
     5  
     6  	"github.com/coreos/etcd/store"
     7  	"github.com/coreos/etcd/third_party/github.com/goraft/raft"
     8  )
     9  
    10  func init() {
    11  	store.RegisterCommandFactory(&CommandFactory{})
    12  }
    13  
    14  // CommandFactory provides a pluggable way to create version 2 commands.
    15  type CommandFactory struct {
    16  }
    17  
    18  // Version returns the version of this factory.
    19  func (f *CommandFactory) Version() int {
    20  	return 2
    21  }
    22  
    23  // CreateUpgradeCommand is a no-op since version 2 is the first version to support store versioning.
    24  func (f *CommandFactory) CreateUpgradeCommand() raft.Command {
    25  	return &raft.NOPCommand{}
    26  }
    27  
    28  // CreateSetCommand creates a version 2 command to set a key to a given value in the store.
    29  func (f *CommandFactory) CreateSetCommand(key string, dir bool, value string, expireTime time.Time) raft.Command {
    30  	return &SetCommand{
    31  		Key:        key,
    32  		Value:      value,
    33  		ExpireTime: expireTime,
    34  		Dir:        dir,
    35  	}
    36  }
    37  
    38  // CreateCreateCommand creates a version 2 command to create a new key in the store.
    39  func (f *CommandFactory) CreateCreateCommand(key string, dir bool, value string, expireTime time.Time, unique bool) raft.Command {
    40  	return &CreateCommand{
    41  		Key:        key,
    42  		Value:      value,
    43  		ExpireTime: expireTime,
    44  		Unique:     unique,
    45  		Dir:        dir,
    46  	}
    47  }
    48  
    49  // CreateUpdateCommand creates a version 2 command to update a key to a given value in the store.
    50  func (f *CommandFactory) CreateUpdateCommand(key string, value string, expireTime time.Time) raft.Command {
    51  	return &UpdateCommand{
    52  		Key:        key,
    53  		Value:      value,
    54  		ExpireTime: expireTime,
    55  	}
    56  }
    57  
    58  // CreateDeleteCommand creates a version 2 command to delete a key from the store.
    59  func (f *CommandFactory) CreateDeleteCommand(key string, dir, recursive bool) raft.Command {
    60  	return &DeleteCommand{
    61  		Key:       key,
    62  		Recursive: recursive,
    63  		Dir:       dir,
    64  	}
    65  }
    66  
    67  // CreateCompareAndSwapCommand creates a version 2 command to conditionally set a key in the store.
    68  func (f *CommandFactory) CreateCompareAndSwapCommand(key string, value string, prevValue string, prevIndex uint64, expireTime time.Time) raft.Command {
    69  	return &CompareAndSwapCommand{
    70  		Key:        key,
    71  		Value:      value,
    72  		PrevValue:  prevValue,
    73  		PrevIndex:  prevIndex,
    74  		ExpireTime: expireTime,
    75  	}
    76  }
    77  
    78  // CreateCompareAndDeleteCommand creates a version 2 command to conditionally delete a key from the store.
    79  func (f *CommandFactory) CreateCompareAndDeleteCommand(key string, prevValue string, prevIndex uint64) raft.Command {
    80  	return &CompareAndDeleteCommand{
    81  		Key:       key,
    82  		PrevValue: prevValue,
    83  		PrevIndex: prevIndex,
    84  	}
    85  }
    86  
    87  func (f *CommandFactory) CreateSyncCommand(now time.Time) raft.Command {
    88  	return &SyncCommand{
    89  		Time: time.Now(),
    90  	}
    91  }