Files
adler32
ahash
aho_corasick
ansi_term
antidote
anyhow
arc_swap
arrayvec
async_speed_limit
async_stream
async_stream_impl
async_trait
atty
aws
backtrace
backtrace_sys
backup
base64
batch_system
bitfield
bitflags
block_buffer
boolinator
bstr
byteorder
bytes
bzip2_sys
cargo_metadata
cdc
cfg_if
chrono
chrono_tz
clap
cloud
codec
collections
concurrency_manager
configuration
configuration_derive
const_fn
const_random
const_random_macro
coprocessor_plugin_api
cpuid_bool
crc32fast
crc64fast
crossbeam
crossbeam_channel
crossbeam_deque
crossbeam_epoch
crossbeam_queue
crossbeam_skiplist
crossbeam_utils
crypto_mac
darling
darling_core
darling_macro
dashmap
debugid
derive_more
digest
dirs
dirs_sys
doc_comment
dtoa
either
encoding_rs
encryption
encryption_export
engine_panic
engine_rocks
engine_test
engine_traits
engine_traits_tests
error_code
error_code_gen
example_plugin
external_storage
external_storage_export
fail
failure
failure_derive
farmhash
file_system
filetime
flate2
fnv
foreign_types
foreign_types_shared
fs2
futures
futures_channel
futures_core
futures_executor
futures_io
futures_macro
futures_sink
futures_task
futures_timer
futures_util
async_await
compat
future
io
lock
sink
stream
task
fuzz
fxhash
gcp
generic_array
getrandom
getset
grpcio
grpcio_health
grpcio_sys
h2
heck
hex
hmac
http
http_body
httparse
httpdate
hyper
hyper_openssl
hyper_tls
ident_case
idna
indexmap
inferno
inotify
inotify_sys
instant
into_other
iovec
ipnet
ipnetwork
itertools
itoa
keys
kvproto
lazy_static
lazycell
libc
libflate
libflate_lz77
libloading
librocksdb_sys
libtitan_sys
libz_sys
linked_hash_map
linked_hash_set
lock_api
log
log_wrappers
lz4_sys
match_template
matches
md5
memchr
memmap
memoffset
memory_trace_macros
mime
mime_guess
mio
mio_extras
mio_uds
more_asserts
murmur3
native_tls
net2
nix
nodrop
nom
notify
num
num_complex
num_cpus
num_derive
num_format
num_integer
num_iter
num_rational
num_traits
once_cell
opaque_debug
openssl
openssl_probe
openssl_sys
ordered_float
panic_hook
parking_lot
parking_lot_core
paste
paste_impl
pd_client
percent_encoding
pest
pin_project
pin_project_lite
pin_utils
pnet_base
pnet_datalink
pnet_sys
pprof
ppv_lite86
proc_macro2
proc_macro_error
proc_macro_error_attr
proc_macro_hack
proc_macro_nested
procfs
procinfo
profiler
prometheus
prometheus_static_metric
promptly
prost
prost_derive
protobuf
quick_xml
quote
raft
raft_engine
raft_log_engine
raft_proto
raftstore
rand
rand_chacha
rand_core
rand_isaac
rayon
rayon_core
regex
regex_automata
regex_syntax
remove_dir_all
reqwest
resolved_ts
rev_lines
rgb
ring
rle_decode_fast
rocksdb
rusoto_core
rusoto_credential
rusoto_kms
rusoto_s3
rusoto_signature
rusoto_sts
rustc_demangle
rustyline
ryu
safemem
same_file
scopeguard
security
semver
semver_parser
serde
serde_derive
serde_ignored
serde_json
serde_urlencoded
serde_with
serde_with_macros
server
sha2
shlex
signal
signal_hook_registry
slab
slog
slog_async
slog_derive
slog_global
slog_json
slog_term
smallvec
snappy_sys
socket2
spin
sst_importer
stable_deref_trait
standback
static_assertions
str_stack
strsim
structopt
structopt_derive
strum
strum_macros
subtle
symbolic_common
symbolic_demangle
syn
syn_mid
synstructure
sysinfo
take_mut
tame_gcs
tame_oauth
tempfile
term
test_backup
test_coprocessor
test_pd
test_raftstore
test_sst_importer
test_storage
test_util
textwrap
thiserror
thiserror_impl
thread_local
tidb_query_aggr
tidb_query_codegen
tidb_query_common
tidb_query_datatype
tidb_query_executors
tidb_query_expr
tikv
coprocessor
coprocessor_v2
import
server
storage
tikv_alloc
tikv_ctl
tikv_jemalloc_ctl
tikv_jemalloc_sys
tikv_jemallocator
tikv_kv
tikv_server
tikv_util
time
time_macros
time_macros_impl
tipb
tipb_helper
tokio
fs
future
io
loom
macros
net
park
process
runtime
signal
stream
sync
task
time
util
tokio_executor
tokio_macros
tokio_openssl
tokio_timer
tokio_tls
tokio_util
toml
tower_service
tracing
tracing_core
try_lock
twoway
twox_hash
txn_types
typenum
ucd_trie
unchecked_index
unicase
unicode_bidi
unicode_normalization
unicode_segmentation
unicode_width
unicode_xid
untrusted
url
utf8parse
uuid
vec_map
vlog
walkdir
want
xml
yatp
zeroize
zstd_sys
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
// Copyright 2021 TiKV Project Authors. Licensed under Apache-2.0.

use std::any::Any;
use std::fmt;
use std::time::Duration;

use crate::Key;

/// Result returned by operations on [`RawStorage`].
pub type PluginResult<T> = std::result::Result<T, PluginError>;

/// Error returned by operations on [`RawStorage`].
///
/// If a plugin wants to return a custom error, e.g. an error in the business logic, the plugin should
/// return an appropriately encoded error in [`RawResponse`]; in other words, plugins are responsible
/// for their error handling by themselves.
#[derive(Debug)]
pub enum PluginError {
    KeyNotInRegion {
        key: Key,
        region_id: u64,
        start_key: Key,
        end_key: Key,
    },
    Timeout(Duration),
    Canceled,

    /// Errors that can not be handled by a coprocessor plugin but should instead be returned to the
    /// client.
    ///
    /// If such an error appears, plugins can run some cleanup code and return early from the
    /// request. The error will be passed to the client and the client might retry the request.
    Other(Box<dyn Any>),
}

impl fmt::Display for PluginError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            PluginError::KeyNotInRegion { key, region_id, .. } => {
                write!(f, "Key {:?} not found in region {:?}", key, region_id)
            }
            PluginError::Timeout(d) => write!(f, "timeout after {:?}", d),
            PluginError::Canceled => write!(f, "request canceled"),
            PluginError::Other(e) => write!(f, "{:?}", e),
        }
    }
}

impl std::error::Error for PluginError {}