reth_exex

Struct Wal

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pub struct Wal<N: NodePrimitives = EthPrimitives> { /* private fields */ }
Expand description

WAL is a write-ahead log (WAL) that stores the notifications sent to ExExes.

WAL is backed by a directory of binary files represented by Storage and a block cache represented by BlockCache. The role of the block cache is to avoid walking the WAL directory and decoding notifications every time we want to iterate or finalize the WAL.

The expected mode of operation is as follows:

  1. On every new canonical chain notification, call Wal::commit.
  2. When the chain is finalized, call Wal::finalize to prevent the infinite growth of the WAL.

Implementations§

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impl<N> Wal<N>
where N: NodePrimitives,

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pub fn new(directory: impl AsRef<Path>) -> Result<Self>

Creates a new instance of Wal.

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pub fn handle(&self) -> WalHandle<N>

Returns a read-only handle to the WAL.

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pub fn commit(&self, notification: &ExExNotification<N>) -> Result<()>

Commits the notification to WAL.

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pub fn finalize(&self, to_block: BlockNumHash) -> Result<()>

Finalizes the WAL up to the given canonical block, inclusive.

The caller should check that all ExExes are on the canonical chain and will not need any blocks from the WAL below the provided block, inclusive.

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pub fn iter_notifications( &self, ) -> Result<Box<dyn Iterator<Item = Result<ExExNotification<N>>> + '_>>

Returns an iterator over all notifications in the WAL.

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pub fn num_blocks(&self) -> usize

Returns the number of blocks in the WAL.

Trait Implementations§

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impl<N: Clone + NodePrimitives> Clone for Wal<N>

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fn clone(&self) -> Wal<N>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<N: Debug + NodePrimitives> Debug for Wal<N>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<N> Freeze for Wal<N>

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impl<N = EthPrimitives> !RefUnwindSafe for Wal<N>

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impl<N> Send for Wal<N>

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impl<N> Sync for Wal<N>

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impl<N> Unpin for Wal<N>

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impl<N = EthPrimitives> !UnwindSafe for Wal<N>

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes