frostfs-s3-gw/internal/frostfs/services/client/client.go

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package client
import (
"context"
"fmt"
"sync"
grpcService "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/services/tree"
"google.golang.org/grpc"
)
type TreeClient struct {
mu sync.RWMutex
address string
opts []grpc.DialOption
conn *grpc.ClientConn
service grpcService.TreeServiceClient
dialed bool
}
// NewTreeClient creates new tree client with auto dial.
func NewTreeClient(addr string, opts ...grpc.DialOption) *TreeClient {
return &TreeClient{
address: addr,
opts: opts,
}
}
func (c *TreeClient) dial(ctx context.Context) error {
c.mu.Lock()
defer c.mu.Unlock()
if c.dialed {
return fmt.Errorf("couldn't dial '%s': connection already established", c.address)
}
conn, err := grpc.Dial(c.address, c.opts...)
if err != nil {
return fmt.Errorf("grpc dial node tree service: %w", err)
}
serviceClient := grpcService.NewTreeServiceClient(conn)
if _, err = serviceClient.Healthcheck(ctx, &grpcService.HealthcheckRequest{}); err != nil {
return fmt.Errorf("healthcheck tree service: %w", err)
}
c.conn = conn
c.service = serviceClient
c.dialed = true
return nil
}
func (c *TreeClient) TreeClient(ctx context.Context) (grpcService.TreeServiceClient, error) {
c.mu.RLock()
dialed := c.dialed
c.mu.RUnlock()
if !dialed {
if err := c.dial(ctx); err != nil {
return nil, err
}
}
return c.service, nil
}
func (c *TreeClient) Address() string {
return c.address
}