Struct LogRecord

pub struct LogRecord {
    pub seq_no: u64,
    pub epoch: u64,
    pub timestamp: Timestamp,
    pub local_worker: Worker,
    pub activity_type: ActivityType,
    pub event_type: EventType,
    pub remote_worker: Option<Worker>,
    pub operator_id: Option<OperatorId>,
    pub channel_id: Option<ChannelId>,
    pub correlator_id: Option<u64>,
    pub length: Option<usize>,
}

A LogRecord constitutes the unified struct representation of log messages from various stream processors.

It is the underlying structure from which the PAG construction starts. If necessary, it can also be serialized e.g. into a msgpack representation.

Fields

seq_no: u64

worker-unique identifier of a message, given in order the events are logged in the computation.

epoch: u64

epoch of the computation this record belongs to

timestamp: Timestamp

Event time in nanoseconds since the Epoch (midnight, January 1, 1970 UTC).

local_worker: Worker

Context this event occured in; denotes which of the parallel timelines it belongs to.

activity_type: ActivityType

Describes the instrumentation point which triggered this event.

event_type: EventType

Identifies which end of an edge this program event belongs to.

remote_worker: Option<Worker>

Similar to local_worker but specifies the worker ID for the other end of a sent/received message.

operator_id: Option<OperatorId>

Unique id for the operator in the dataflow. This only applies for some event types, e.g. scheduling or processing.

channel_id: Option<ChannelId>

Unique id for the channel in the dataflow. This only applies for some event types, e.g. data / control messages.

correlator_id: Option<u64>

correlates remote events belonging together

length: Option<usize>

Number of records to detect skew

Trait Implementations

impl Abomonation for LogRecord

unsafe fn entomb<W: Write>(&self, _write: &mut W) -> Result<()>

Write any additional information about &self beyond its binary representation.

fn extent(&self) -> usize

Reports the number of further bytes required to entomb self.

unsafe fn exhume<'a, 'b>( &'a mut self, bytes: &'b mut [u8], ) -> Option<&'b mut [u8]>

Recover any information for &mut self not evident from its binary representation.

impl Clone for LogRecord

fn clone(&self) -> LogRecord

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LogRecord

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

Formats the value using the given formatter.

impl Hash for LogRecord

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 LogRecord

fn cmp(&self, other: &LogRecord) -> 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 LogRecord

fn eq(&self, other: &LogRecord) -> 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 LogRecord

fn partial_cmp(&self, other: &LogRecord) -> 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 Eq for LogRecord

impl StructuralPartialEq for LogRecord