omnigraph-engine 0.2.2

Runtime engine for the Omnigraph graph database.
Documentation 
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use thiserror::Error;

pub type Result<T> = std::result::Result<T, OmniError>;

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ManifestErrorKind {
    BadRequest,
    NotFound,
    Conflict,
    Internal,
}

#[derive(Debug, Clone, Error)]
#[error("{message}")]
pub struct ManifestError {
    pub kind: ManifestErrorKind,
    pub message: String,
}

impl ManifestError {
    pub fn new(kind: ManifestErrorKind, message: impl Into<String>) -> Self {
        Self {
            kind,
            message: message.into(),
        }
    }
}

#[derive(Debug, Clone)]
pub struct MergeConflict {
    pub table_key: String,
    pub row_id: Option<String>,
    pub kind: MergeConflictKind,
    pub message: String,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MergeConflictKind {
    DivergentInsert,
    DivergentUpdate,
    DeleteVsUpdate,
    OrphanEdge,
    UniqueViolation,
    CardinalityViolation,
    ValueConstraintViolation,
}

#[derive(Debug, Error)]
pub enum OmniError {
    #[error("{0}")]
    Compiler(#[from] omnigraph_compiler::error::NanoError),
    #[error("storage: {0}")]
    Lance(String),
    #[error("query: {0}")]
    DataFusion(String),
    #[error("io: {0}")]
    Io(#[from] std::io::Error),
    #[error("{0}")]
    Manifest(ManifestError),
    #[error("merge conflicts: {0:?}")]
    MergeConflicts(Vec<MergeConflict>),
}

impl OmniError {
    pub fn manifest(message: impl Into<String>) -> Self {
        Self::Manifest(ManifestError::new(ManifestErrorKind::BadRequest, message))
    }

    pub fn manifest_not_found(message: impl Into<String>) -> Self {
        Self::Manifest(ManifestError::new(ManifestErrorKind::NotFound, message))
    }

    pub fn manifest_conflict(message: impl Into<String>) -> Self {
        Self::Manifest(ManifestError::new(ManifestErrorKind::Conflict, message))
    }

    pub fn manifest_internal(message: impl Into<String>) -> Self {
        Self::Manifest(ManifestError::new(ManifestErrorKind::Internal, message))
    }
}