4f756bf121
Shard's mode was not used in the Node, so added only two modes whose roles are clear. More modes will be added in the future. Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
47 lines
1 KiB
Go
47 lines
1 KiB
Go
package shard
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import "errors"
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// Mode represents enumeration of Shard work modes.
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type Mode uint32
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// ErrReadOnlyMode is returned when it is impossible to apply operation
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// that changes shard's memory due to the "read-only" shard's mode.
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var ErrReadOnlyMode = errors.New("shard is in read-only mode")
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// TODO: more detailed description of shard modes.
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const (
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// ModeReadWrite is a Mode value for shard that is available
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// for read and write operations. Default shard mode.
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ModeReadWrite Mode = iota
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// ModeReadOnly is a Mode value for shard that does not
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// accept write operation but is readable.
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ModeReadOnly
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)
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func (m Mode) String() string {
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switch m {
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default:
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return "UNDEFINED"
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case ModeReadWrite:
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return "READ_WRITE"
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case ModeReadOnly:
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return "READ_ONLY"
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}
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}
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// SetMode sets mode of the shard.
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//
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// Returns any error encountered that did not allow
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// setting shard mode.
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func (s *Shard) SetMode(m Mode) error {
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s.mode.Store(uint32(m))
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return nil
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}
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func (s *Shard) getMode() Mode {
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return Mode(s.mode.Load())
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}
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