mirror of https://github.com/jackc/pgx.git
62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package pgproto3
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import (
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"encoding/json"
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"errors"
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)
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type ReadyForQuery struct {
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TxStatus byte
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}
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// Backend identifies this message as sendable by the PostgreSQL backend.
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func (*ReadyForQuery) Backend() {}
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// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
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// type identifier and 4 byte message length.
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func (dst *ReadyForQuery) Decode(src []byte) error {
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if len(src) != 1 {
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return &invalidMessageLenErr{messageType: "ReadyForQuery", expectedLen: 1, actualLen: len(src)}
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}
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dst.TxStatus = src[0]
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return nil
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}
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// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
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func (src *ReadyForQuery) Encode(dst []byte) ([]byte, error) {
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return append(dst, 'Z', 0, 0, 0, 5, src.TxStatus), nil
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}
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// MarshalJSON implements encoding/json.Marshaler.
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func (src ReadyForQuery) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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TxStatus string
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}{
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Type: "ReadyForQuery",
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TxStatus: string(src.TxStatus),
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})
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}
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// UnmarshalJSON implements encoding/json.Unmarshaler.
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func (dst *ReadyForQuery) UnmarshalJSON(data []byte) error {
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// Ignore null, like in the main JSON package.
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if string(data) == "null" {
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return nil
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}
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var msg struct {
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TxStatus string
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}
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if err := json.Unmarshal(data, &msg); err != nil {
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return err
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}
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if len(msg.TxStatus) != 1 {
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return errors.New("invalid length for ReadyForQuery.TxStatus")
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}
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dst.TxStatus = msg.TxStatus[0]
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return nil
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}
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