mirror of https://github.com/tidwall/tile38.git
83 lines
1.5 KiB
Go
83 lines
1.5 KiB
Go
package endpoint
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import (
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/tidwall/tile38/internal/hservice"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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)
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const grpcExpiresAfter = time.Second * 30
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// GRPCConn is an endpoint connection
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type GRPCConn struct {
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mu sync.Mutex
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ep Endpoint
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ex bool
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t time.Time
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conn *grpc.ClientConn
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sconn hservice.HookServiceClient
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}
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func newGRPCConn(ep Endpoint) *GRPCConn {
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return &GRPCConn{
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ep: ep,
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t: time.Now(),
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}
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}
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// Expired returns true if the connection has expired
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func (conn *GRPCConn) Expired() bool {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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if !conn.ex {
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if time.Now().Sub(conn.t) > grpcExpiresAfter {
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if conn.conn != nil {
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conn.close()
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}
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conn.ex = true
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}
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}
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return conn.ex
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}
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func (conn *GRPCConn) close() {
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if conn.conn != nil {
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conn.conn.Close()
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conn.conn = nil
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}
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}
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// Send sends a message
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func (conn *GRPCConn) Send(msg string) error {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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if conn.ex {
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return errExpired
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}
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conn.t = time.Now()
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if conn.conn == nil {
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addr := fmt.Sprintf("%s:%d", conn.ep.GRPC.Host, conn.ep.GRPC.Port)
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var err error
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conn.conn, err = grpc.Dial(addr, grpc.WithInsecure())
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if err != nil {
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conn.close()
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return err
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}
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conn.sconn = hservice.NewHookServiceClient(conn.conn)
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}
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r, err := conn.sconn.Send(context.Background(), &hservice.MessageRequest{Value: msg})
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if err != nil {
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conn.close()
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return err
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}
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if !r.Ok {
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conn.close()
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return errors.New("invalid grpc reply")
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}
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return nil
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}
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