mon 0.2.2

Rust driver for MongoDB
Documentation 
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use std::fmt::{Display, Error, Formatter};

use bson::Document;
use error::Error as MongoError;
use util::separator::Separatable;

/// Contains the information about a given command that started.
pub struct CommandStarted {
    pub command: Document,
    pub database_name: String,
    pub command_name: String,
    pub request_id: i64,
    pub connection_string: String,
}

impl Display for CommandStarted {
    fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
        fmt.write_fmt(
            format_args!(
                "COMMAND.{} {} STARTED: {}",
                self.command_name,
                self.connection_string,
                self.command
            )
        )
    }
}

/// Contains the information about a given command that completed.
pub enum CommandResult<'a> {
    Success {
        duration: u64,
        reply: Document,
        command_name: String,
        request_id: i64,
        connection_string: String,
    },
    Failure {
        duration: u64,
        command_name: String,
        failure: &'a MongoError,
        request_id: i64,
        connection_string: String,
    },
}

impl<'a> Display for CommandResult<'a> {
    fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
        match *self {
            CommandResult::Success {
                duration,
                ref reply,
                ref command_name,
                ref connection_string,
                ..
            } => {
                fmt.write_fmt(
                    format_args!(
                        "COMMAND.{} {} COMPLETED: {} ({} ns)",
                        command_name,
                        connection_string,
                        reply,
                        duration.separated_string()
                    )
                )
            }
            CommandResult::Failure {
                duration,
                ref command_name,
                failure,
                ref connection_string,
                ..
            } => {
                fmt.write_fmt(
                    format_args!(
                        "COMMAND.{} {} FAILURE: {} ({} ns)",
                        command_name,
                        connection_string,
                        failure,
                        duration.separated_string()
                    )
                )
            }
        }
    }
}