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76 lines
2.5 KiB
76 lines
2.5 KiB
package memcache
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import (
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"errors"
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"fmt"
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"strings"
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pkgerr "github.com/pkg/errors"
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)
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var (
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// ErrNotFound not found
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ErrNotFound = errors.New("memcache: key not found")
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// ErrExists exists
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ErrExists = errors.New("memcache: key exists")
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// ErrNotStored not stored
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ErrNotStored = errors.New("memcache: key not stored")
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// ErrCASConflict means that a CompareAndSwap call failed due to the
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// cached value being modified between the Get and the CompareAndSwap.
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// If the cached value was simply evicted rather than replaced,
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// ErrNotStored will be returned instead.
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ErrCASConflict = errors.New("memcache: compare-and-swap conflict")
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// ErrPoolExhausted is returned from a pool connection method (Store, Get,
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// Delete, IncrDecr, Err) when the maximum number of database connections
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// in the pool has been reached.
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ErrPoolExhausted = errors.New("memcache: connection pool exhausted")
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// ErrPoolClosed pool closed
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ErrPoolClosed = errors.New("memcache: connection pool closed")
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// ErrConnClosed conn closed
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ErrConnClosed = errors.New("memcache: connection closed")
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// ErrMalformedKey is returned when an invalid key is used.
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// Keys must be at maximum 250 bytes long and not
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// contain whitespace or control characters.
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ErrMalformedKey = errors.New("memcache: malformed key is too long or contains invalid characters")
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// ErrValueSize item value size must less than 1mb
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ErrValueSize = errors.New("memcache: item value size must not greater than 1mb")
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// ErrStat stat error for monitor
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ErrStat = errors.New("memcache unexpected errors")
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// ErrItem item nil.
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ErrItem = errors.New("memcache: item object nil")
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// ErrItemObject object type Assertion failed
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ErrItemObject = errors.New("memcache: item object protobuf type assertion failed")
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)
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type protocolError string
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func (pe protocolError) Error() string {
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return fmt.Sprintf("memcache: %s (possible server error or unsupported concurrent read by application)", string(pe))
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}
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func formatErr(err error) string {
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e := pkgerr.Cause(err)
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switch e {
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case ErrNotFound, ErrExists, ErrNotStored, nil:
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return ""
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default:
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es := e.Error()
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switch {
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case strings.HasPrefix(es, "read"):
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return "read timeout"
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case strings.HasPrefix(es, "dial"):
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return "dial timeout"
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case strings.HasPrefix(es, "write"):
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return "write timeout"
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case strings.Contains(es, "EOF"):
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return "eof"
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case strings.Contains(es, "reset"):
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return "reset"
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case strings.Contains(es, "broken"):
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return "broken pipe"
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default:
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return "unexpected err"
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}
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}
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}
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