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
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112

//! Errors that can be returned by the library
use actix::MailboxError;
use failure::Fail;
use std::io;
use tokio::timer;

/// Enum wrapping all possible errors that can be generated by the library
#[derive(Debug, Fail)]
pub enum Error {
    /// Wraps actix's `MailboxError` error
    #[fail(display = "internal gWasm API error: {}", _0)]
    MailboxError(MailboxError),

    /// Wraps tokio's `timer::Error` error
    #[fail(display = "internal gWasm API error: {}", _0)]
    TimerError(timer::Error),

    /// Wraps libstd's `std::io::Error` error
    #[fail(display = "internal gWasm API error: {}", _0)]
    IOError(io::Error),

    /// Wraps Golem's `actix_wamp::Error` error
    #[fail(display = "internal Golem error: {}", _0)]
    WampError(actix_wamp::Error),

    /// Wraps Golem RPC's `golem_rpc_api::Error` error
    #[fail(display = "internal Golem error: {}", _0)]
    GolemRPCError(golem_rpc_api::Error),

    /// Wraps `tokio_ctrlc_error::KeyboardInterrupt` which is used to handle
    /// Ctrl-C interrupt event for the lib's client
    #[fail(display = "received Ctrl-C interrupt")]
    KeyboardInterrupt(tokio_ctrlc_error::KeyboardInterrupt),

    /// Wraps other `tokio_ctrlc_error::IoError` type errors
    #[fail(display = "internal gWasm API error: {}", _0)]
    CtrlcError(tokio_ctrlc_error::IoError),

    /// Wraps `chrono::ParseError` error
    #[fail(display = "error parsing Timeout value: {}", _0)]
    ChronoError(chrono::ParseError),

    /// Error generated when trying to create a zero [`Timeout`](../timeout/struct.Timeout.html)
    /// value for a Golem Task
    #[fail(display = "zero timeout \"00:00:00\" is forbidden")]
    ZeroTimeoutError,

    /// Error when no TaskInfo is received when polling for task progress
    /// in [`poll_task_progress`](../golem/fn.poll_task_progress.html)
    #[fail(display = "empty TaskInfo received from Golem")]
    EmptyTaskInfo,

    /// Error when no progress can be extracted from TaskInfo
    #[fail(display = "empty progress in TaskInfo")]
    EmptyProgress,

    /// Error when gWasm task was aborted externally
    #[fail(display = "task aborted externally")]
    TaskAborted,

    /// Error when gWasm task timed out
    #[fail(display = "task timed out")]
    TaskTimedOut,
}

impl From<io::Error> for Error {
    fn from(err: io::Error) -> Self {
        Error::IOError(err)
    }
}

impl From<MailboxError> for Error {
    fn from(err: MailboxError) -> Self {
        Error::MailboxError(err)
    }
}

impl From<timer::Error> for Error {
    fn from(err: timer::Error) -> Self {
        Error::TimerError(err)
    }
}

impl From<actix_wamp::Error> for Error {
    fn from(err: actix_wamp::Error) -> Self {
        Error::WampError(err)
    }
}

impl From<golem_rpc_api::Error> for Error {
    fn from(err: golem_rpc_api::Error) -> Self {
        Error::GolemRPCError(err)
    }
}

impl From<tokio_ctrlc_error::IoError> for Error {
    fn from(err: tokio_ctrlc_error::IoError) -> Self {
        Error::CtrlcError(err)
    }
}

impl From<tokio_ctrlc_error::KeyboardInterrupt> for Error {
    fn from(err: tokio_ctrlc_error::KeyboardInterrupt) -> Self {
        Error::KeyboardInterrupt(err)
    }
}

impl From<chrono::ParseError> for Error {
    fn from(err: chrono::ParseError) -> Self {
        Error::ChronoError(err)
    }
}