forked from TrueCloudLab/frostfs-sdk-go
50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
package transformer
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import (
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"context"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"github.com/nspcc-dev/neo-go/pkg/util/slice"
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)
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type chanTarget struct {
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header *objectSDK.Object
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payload []byte
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ch chan<- *objectSDK.Object
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}
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// NewChannelTarget returns ObjectTarget which writes
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// object parts to a provided channel.
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func NewChannelTarget(ch chan<- *objectSDK.Object) ObjectTarget {
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return &chanTarget{
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ch: ch,
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}
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}
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// WriteHeader implements the ObjectTarget interface.
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func (c *chanTarget) WriteHeader(_ context.Context, object *objectSDK.Object) error {
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c.header = object
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return nil
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}
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// Write implements the ObjectTarget interface.
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func (c *chanTarget) Write(_ context.Context, p []byte) (n int, err error) {
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c.payload = append(c.payload, p...)
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return len(p), nil
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}
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// Close implements the ObjectTarget interface.
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func (c *chanTarget) Close(ctx context.Context) (*AccessIdentifiers, error) {
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if len(c.payload) != 0 {
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c.header.SetPayload(slice.Copy(c.payload))
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}
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select {
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case c.ch <- c.header:
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case <-ctx.Done():
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return nil, ctx.Err()
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}
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c.header = nil
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c.payload = nil
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return new(AccessIdentifiers), nil
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}
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