Struct FileChunkId 

pub struct FileChunkId(/* private fields */);

File chunk identifier value object for type-safe chunk management

This value object provides type-safe file chunk identification with temporal ordering, processing sequence management, and comprehensive validation capabilities. It implements Domain-Driven Design (DDD) value object patterns with immutable semantics.

Key Features

• Type Safety: Strongly-typed chunk identifiers that cannot be confused with other IDs
• Temporal Ordering: ULID-based time-ordered creation sequence for chunk processing
• Processing Sequence: Natural chronological ordering for deterministic processing
• Traceability: Complete chunk lifecycle tracking and debugging support
• Validation: Comprehensive chunk-specific validation and business rules
• Serialization: Consistent serialization across storage backends and APIs

Temporal Ordering Benefits

The ULID-based approach provides several advantages for chunk processing:

• Processing Order: Natural time ordering ensures chunks are processed in sequence
• Deterministic Behavior: Consistent processing order across system restarts
• Debugging Support: Easy identification of chunk creation times and sequences
• Audit Trail: Complete chronological history of chunk processing

Usage Examples

Cross-Platform Compatibility

• Rust: FileChunkId newtype wrapper with full validation
• Go: FileChunkID struct with equivalent interface
• JSON: String representation of ULID for API compatibility
• Database: TEXT column with ULID string storage

Implementations

impl FileChunkId

pub fn new() -> Self

Creates a new file chunk ID with current timestamp

Purpose

Generates a unique, time-ordered file chunk identifier using ULID. Each chunk ID captures the exact moment of chunk creation for processing order.

Why

Time-ordered chunk IDs provide:

• Natural chronological processing order
• Deterministic chunk sequence across restarts
• Built-in creation timestamp for monitoring
• Debugging support with temporal information

Returns

New FileChunkId with current millisecond timestamp

Examples

pub fn from_ulid(ulid: Ulid) -> Result<Self, PipelineError>

Creates a file chunk ID from an existing ULID

pub fn from_string(s: &str) -> Result<Self, PipelineError>

Creates a file chunk ID from a string representation

pub fn from_timestamp_ms(timestamp_ms: u64) -> Self

Creates a file chunk ID from a timestamp

pub fn as_ulid(&self) -> Ulid

Gets the underlying ULID value

pub fn timestamp_ms(&self) -> u64

Gets the timestamp component

pub fn datetime(&self) -> DateTime<Utc>

Gets the creation time as a DateTime

pub fn validate(&self) -> Result<(), PipelineError>

Validates the file chunk ID

pub fn is_nil(&self) -> bool

Checks if this is a nil file chunk ID

Trait Implementations

impl AsRef<Ulid> for FileChunkId

fn as_ref(&self) -> &Ulid

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for FileChunkId

fn clone(&self) -> FileChunkId

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FileChunkId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FileChunkId

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for FileChunkId

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for FileChunkId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<FileChunkId> for Ulid

fn from(id: FileChunkId) -> Self

Converts to this type from the input type.

impl From<Ulid> for FileChunkId

fn from(ulid: Ulid) -> Self

Converts to this type from the input type.

impl FromStr for FileChunkId

type Err = PipelineError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for FileChunkId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for FileChunkId

fn cmp(&self, other: &FileChunkId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for FileChunkId

fn eq(&self, other: &FileChunkId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for FileChunkId

fn partial_cmp(&self, other: &FileChunkId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for FileChunkId

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for FileChunkId

impl StructuralPartialEq for FileChunkId