83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
package main
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import (
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"encoding/binary"
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"fmt"
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"log"
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"sync"
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"time"
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)
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type CartClient struct {
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*CartTCPClient
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}
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func CartDial(address string) (*CartClient, error) {
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mux, err := NewCartTCPClient(address)
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if err != nil {
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return nil, err
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}
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client := &CartClient{
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CartTCPClient: mux,
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}
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return client, nil
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}
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func (c *Client) Close() {
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c.PersistentConnection.Close()
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}
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type CartTCPClient struct {
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PersistentConnection *PersistentConnection
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sendMux sync.Mutex
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ErrorCount int
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address string
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*CartPacketQueue
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}
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func NewCartTCPClient(address string) (*CartTCPClient, error) {
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connection, err := NewPersistentConnection(address)
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if err != nil {
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return nil, err
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}
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return &CartTCPClient{
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ErrorCount: 0,
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PersistentConnection: connection,
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address: address,
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CartPacketQueue: NewCartPacketQueue(connection),
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}, nil
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}
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func (m *CartTCPClient) SendPacket(messageType CartMessage, id CartId, data []byte) error {
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m.sendMux.Lock()
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defer m.sendMux.Unlock()
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m.PersistentConnection.Conn.Write(header[:])
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err := binary.Write(m.PersistentConnection, binary.LittleEndian, CartPacket{
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Version: CurrentPacketVersion,
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MessageType: messageType,
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DataLength: uint32(len(data)),
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Id: id,
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})
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if err != nil {
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return m.PersistentConnection.HandleConnectionError(err)
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}
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_, err = m.PersistentConnection.Write(data)
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return m.PersistentConnection.HandleConnectionError(err)
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}
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func (m *CartTCPClient) Call(messageType CartMessage, id CartId, responseType CartMessage, data []byte) (*CallResult, error) {
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packetChan := m.Expect(responseType, id)
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err := m.SendPacket(messageType, id, data)
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if err != nil {
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return nil, m.PersistentConnection.HandleConnectionError(err)
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}
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select {
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case ret := <-packetChan:
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return &ret, nil
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case <-time.After(time.Second):
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log.Printf("Timeout waiting for cart response to message type %d\n", responseType)
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return nil, m.PersistentConnection.HandleConnectionError(fmt.Errorf("timeout"))
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}
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}
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