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package topology
import (
"fmt"
"go.mongodb.org/mongo-driver/mongo/description"
)
// ConnectionError represents a connection error.
type ConnectionError struct {
ConnectionID string
Wrapped error
// init will be set to true if this error occured during connection initialization or
// during a connection handshake.
init bool
message string
}
// Error implements the error interface.
func (e ConnectionError) Error() string {
message := e.message
if e.init {
fullMsg := "error occured during connection handshake"
if message != "" {
fullMsg = fmt.Sprintf("%s: %s", fullMsg, message)
}
message = fullMsg
}
if e.Wrapped != nil && message != "" {
return fmt.Sprintf("connection(%s) %s: %s", e.ConnectionID, message, e.Wrapped.Error())
}
if e.Wrapped != nil {
return fmt.Sprintf("connection(%s) %s", e.ConnectionID, e.Wrapped.Error())
}
return fmt.Sprintf("connection(%s) %s", e.ConnectionID, message)
}
// Unwrap returns the underlying error.
func (e ConnectionError) Unwrap() error {
return e.Wrapped
}
// ServerSelectionError represents a Server Selection error.
type ServerSelectionError struct {
Desc description.Topology
Wrapped error
}
// Error implements the error interface.
func (e ServerSelectionError) Error() string {
if e.Wrapped != nil {
return fmt.Sprintf("server selection error: %s, current topology: { %s }", e.Wrapped.Error(), e.Desc.String())
}
return fmt.Sprintf("server selection error: current topology: { %s }", e.Desc.String())
}
// Unwrap returns the underlying error.
func (e ServerSelectionError) Unwrap() error {
return e.Wrapped
}
// WaitQueueTimeoutError represents a timeout when requesting a connection from the pool
type WaitQueueTimeoutError struct {
Wrapped error
PinnedCursorConnections uint64
PinnedTransactionConnections uint64
maxPoolSize uint64
totalConnectionCount int
}
// Error implements the error interface.
func (w WaitQueueTimeoutError) Error() string {
errorMsg := "timed out while checking out a connection from connection pool"
if w.Wrapped != nil {
errorMsg = fmt.Sprintf("%s: %s", errorMsg, w.Wrapped.Error())
}
return fmt.Sprintf(
"%s; maxPoolSize: %d, connections in use by cursors: %d"+
", connections in use by transactions: %d, connections in use by other operations: %d",
errorMsg,
w.maxPoolSize,
w.PinnedCursorConnections,
w.PinnedTransactionConnections,
uint64(w.totalConnectionCount)-w.PinnedCursorConnections-w.PinnedTransactionConnections)
}
// Unwrap returns the underlying error.
func (w WaitQueueTimeoutError) Unwrap() error {
return w.Wrapped
}
|
