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"b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa" diff --git a/tools/arbitrary-fuzzing/Cargo.toml b/tools/arbitrary-fuzzing/Cargo.toml new file mode 100644 index 0000000..153e63a --- /dev/null +++ b/tools/arbitrary-fuzzing/Cargo.toml @@ -0,0 +1,10 @@ +[package] +name = "pg-walstream-arbitrary-fuzzing" +version = "0.1.0" +edition = "2021" +publish = false +description = "Demonstrates external arbitrary generation for pg_walstream types (no internal changes needed)" + +[dependencies] +pg_walstream = { path = "../.." } +arbitrary = { version = "1", features = ["derive"] } diff --git a/tools/arbitrary-fuzzing/src/lib.rs b/tools/arbitrary-fuzzing/src/lib.rs new file mode 100644 index 0000000..bce0493 --- /dev/null +++ b/tools/arbitrary-fuzzing/src/lib.rs @@ -0,0 +1,289 @@ +//! # External Arbitrary Generators for pg_walstream +//! +//! Construct arbitrary `pg_walstream` types for fuzzing without modifying the library. This crate provides standalone generator functions that produce random instances of `pg_walstream` types using the `arbitrary` crate. +//! +//! ## How to use with `cargo-fuzz` +//! +//! ```ignore +//! use arbitrary::Unstructured; +//! use pg_walstream_arbitrary_fuzzing::generators; +//! +//! libfuzzer_sys::fuzz_target!(|data: &[u8]| { +//! let mut u = Unstructured::new(data); +//! if let Ok(msg) = generators::arbitrary_logical_replication_message(&mut u) { +//! // exercise your code with `msg` +//! } +//! }); +//! ``` + +pub mod generators { + use arbitrary::{self, Unstructured}; + use pg_walstream::protocol::{ + ColumnData, ColumnInfo, LogicalReplicationMessage, MessageType, RelationInfo, TupleData, + }; + use pg_walstream::types::{CachePadded, ReplicaIdentity}; + + /// All `MessageType` variants in a static slice for uniform selection. + const ALL_MESSAGE_TYPES: &[MessageType] = &[ + MessageType::Begin, + MessageType::Commit, + MessageType::Origin, + MessageType::Relation, + MessageType::Type, + MessageType::Insert, + MessageType::Update, + MessageType::Delete, + MessageType::Truncate, + MessageType::Message, + MessageType::StreamStart, + MessageType::StreamStop, + MessageType::StreamCommit, + MessageType::StreamAbort, + MessageType::BeginPrepare, + MessageType::Prepare, + MessageType::CommitPrepared, + MessageType::RollbackPrepared, + MessageType::StreamPrepare, + ]; + + /// Generate an arbitrary `MessageType`. + pub fn arbitrary_message_type(u: &mut Unstructured) -> arbitrary::Result { + u.choose(ALL_MESSAGE_TYPES).copied() + } + + /// Generate an arbitrary `ReplicaIdentity`. + pub fn arbitrary_replica_identity( + u: &mut Unstructured, + ) -> arbitrary::Result { + const VARIANTS: &[ReplicaIdentity] = &[ + ReplicaIdentity::Default, + ReplicaIdentity::Nothing, + ReplicaIdentity::Full, + ReplicaIdentity::Index, + ]; + u.choose(VARIANTS).cloned() + } + + /// Generate an arbitrary `CachePadded` wrapping a `u64`. + pub fn arbitrary_cache_padded_u64(u: &mut Unstructured) -> arbitrary::Result> { + let val: u64 = u.arbitrary()?; + Ok(CachePadded::new(val)) + } + + /// Generate an arbitrary `ColumnData`. + pub fn arbitrary_column_data(u: &mut Unstructured) -> arbitrary::Result { + let variant: u8 = u.int_in_range(0..=3)?; + Ok(match variant { + 0 => ColumnData::null(), + 1 => ColumnData::unchanged(), + 2 => { + let data: Vec = u.arbitrary()?; + ColumnData::text(data) + } + _ => { + let data: Vec = u.arbitrary()?; + ColumnData::binary(data) + } + }) + } + + /// Generate an arbitrary `ColumnInfo`. + pub fn arbitrary_column_info(u: &mut Unstructured) -> arbitrary::Result { + let flags: u8 = u.arbitrary()?; + let name: String = u.arbitrary()?; + let type_id: u32 = u.arbitrary()?; + let type_modifier: i32 = u.arbitrary()?; + Ok(ColumnInfo::new(flags, name, type_id, type_modifier)) + } + + /// Generate an arbitrary `TupleData`. + pub fn arbitrary_tuple_data(u: &mut Unstructured) -> arbitrary::Result { + let len = u.int_in_range(0..=10)?; + let mut columns = Vec::with_capacity(len); + for _ in 0..len { + columns.push(arbitrary_column_data(u)?); + } + Ok(TupleData::new(columns)) + } + + /// Generate an arbitrary `RelationInfo`. + pub fn arbitrary_relation_info(u: &mut Unstructured) -> arbitrary::Result { + let relation_id: u32 = u.arbitrary()?; + let namespace: String = u.arbitrary()?; + let relation_name: String = u.arbitrary()?; + let replica_identity: u8 = u.arbitrary()?; + + let col_count = u.int_in_range(0..=8)?; + let mut columns = Vec::with_capacity(col_count); + for _ in 0..col_count { + columns.push(arbitrary_column_info(u)?); + } + Ok(RelationInfo::new( + relation_id, + namespace, + relation_name, + replica_identity, + columns, + )) + } + + /// Generate an arbitrary `LogicalReplicationMessage`. + /// + /// Covers all 19 enum variants including streaming (v2) and two-phase commit (v3). + pub fn arbitrary_logical_replication_message( + u: &mut Unstructured, + ) -> arbitrary::Result { + let variant: u8 = u.int_in_range(0..=18)?; + Ok(match variant { + 0 => LogicalReplicationMessage::Begin { + final_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + xid: u.arbitrary()?, + }, + 1 => LogicalReplicationMessage::Commit { + flags: u.arbitrary()?, + commit_lsn: u.arbitrary()?, + end_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + }, + 2 => { + let col_count: usize = u.int_in_range(0..=8)?; + let mut columns = Vec::with_capacity(col_count); + for _ in 0..col_count { + columns.push(arbitrary_column_info(u)?); + } + LogicalReplicationMessage::Relation { + relation_id: u.arbitrary()?, + namespace: u.arbitrary()?, + relation_name: u.arbitrary()?, + replica_identity: u.arbitrary()?, + columns, + } + } + 3 => LogicalReplicationMessage::Insert { + relation_id: u.arbitrary()?, + tuple: arbitrary_tuple_data(u)?, + }, + 4 => { + let has_old: bool = u.arbitrary()?; + LogicalReplicationMessage::Update { + relation_id: u.arbitrary()?, + old_tuple: if has_old { + Some(arbitrary_tuple_data(u)?) + } else { + None + }, + new_tuple: arbitrary_tuple_data(u)?, + key_type: if has_old { + Some(u.arbitrary()?) + } else { + None + }, + } + } + 5 => LogicalReplicationMessage::Delete { + relation_id: u.arbitrary()?, + old_tuple: arbitrary_tuple_data(u)?, + key_type: u.arbitrary()?, + }, + 6 => { + let id_count: usize = u.int_in_range(0..=5)?; + let mut relation_ids = Vec::with_capacity(id_count); + for _ in 0..id_count { + relation_ids.push(u.arbitrary()?); + } + LogicalReplicationMessage::Truncate { + relation_ids, + flags: u.arbitrary()?, + } + } + 7 => LogicalReplicationMessage::Type { + type_id: u.arbitrary()?, + namespace: u.arbitrary()?, + type_name: u.arbitrary()?, + }, + 8 => LogicalReplicationMessage::Origin { + origin_lsn: u.arbitrary()?, + origin_name: u.arbitrary()?, + }, + 9 => { + let content: Vec = u.arbitrary()?; + LogicalReplicationMessage::Message { + flags: u.arbitrary()?, + lsn: u.arbitrary()?, + prefix: u.arbitrary()?, + content, + } + } + 10 => LogicalReplicationMessage::StreamStart { + xid: u.arbitrary()?, + first_segment: u.arbitrary()?, + }, + 11 => LogicalReplicationMessage::StreamStop, + 12 => LogicalReplicationMessage::StreamCommit { + xid: u.arbitrary()?, + flags: u.arbitrary()?, + commit_lsn: u.arbitrary()?, + end_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + }, + 13 => { + let has_v4: bool = u.arbitrary()?; + LogicalReplicationMessage::StreamAbort { + xid: u.arbitrary()?, + subtransaction_xid: u.arbitrary()?, + abort_lsn: if has_v4 { + Some(u.arbitrary()?) + } else { + None + }, + abort_timestamp: if has_v4 { + Some(u.arbitrary()?) + } else { + None + }, + } + } + 14 => LogicalReplicationMessage::BeginPrepare { + prepare_lsn: u.arbitrary()?, + end_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + xid: u.arbitrary()?, + gid: u.arbitrary()?, + }, + 15 => LogicalReplicationMessage::Prepare { + flags: u.arbitrary()?, + prepare_lsn: u.arbitrary()?, + end_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + xid: u.arbitrary()?, + gid: u.arbitrary()?, + }, + 16 => LogicalReplicationMessage::CommitPrepared { + flags: u.arbitrary()?, + commit_lsn: u.arbitrary()?, + end_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + xid: u.arbitrary()?, + gid: u.arbitrary()?, + }, + 17 => LogicalReplicationMessage::RollbackPrepared { + flags: u.arbitrary()?, + prepare_end_lsn: u.arbitrary()?, + rollback_end_lsn: u.arbitrary()?, + prepare_timestamp: u.arbitrary()?, + rollback_timestamp: u.arbitrary()?, + xid: u.arbitrary()?, + gid: u.arbitrary()?, + }, + _ => LogicalReplicationMessage::StreamPrepare { + flags: u.arbitrary()?, + prepare_lsn: u.arbitrary()?, + end_lsn: u.arbitrary()?, + timestamp: u.arbitrary()?, + xid: u.arbitrary()?, + gid: u.arbitrary()?, + }, + }) + } +} diff --git a/tools/arbitrary-fuzzing/src/main.rs b/tools/arbitrary-fuzzing/src/main.rs new file mode 100644 index 0000000..e813dc3 --- /dev/null +++ b/tools/arbitrary-fuzzing/src/main.rs @@ -0,0 +1,192 @@ +//! # pg_walstream External Arbitrary / Fuzzing Demo +//! +//! ## Run +//! +//! ```bash +//! cd tools/arbitrary-fuzzing +//! cargo run +//! ``` + +use arbitrary::Unstructured; +use pg_walstream::protocol::LogicalReplicationMessage; +use pg_walstream_arbitrary_fuzzing::generators; + +fn main() { + println!("=== pg_walstream External Arbitrary / Fuzzing Demo ===\n"); + println!("This is an INDEPENDENT binary project. The `arbitrary` crate"); + println!("is NOT a dependency of pg_walstream — only of this tool.\n"); + + // Deterministic LCG-based entropy for reproducible output. + let entropy: Vec = { + let mut v = Vec::with_capacity(65536); + let mut state: u64 = 0xDEAD_BEEF_CAFE_BABE; + for _ in 0..65536 { + state = state.wrapping_mul(6364136223846793005).wrapping_add(1); + v.push((state >> 33) as u8); + } + v + }; + let mut u = Unstructured::new(&entropy); + + // --- MessageType --- + println!("--- MessageType ---"); + let mut seen_types = std::collections::HashSet::new(); + for _ in 0..50 { + if let Ok(mt) = generators::arbitrary_message_type(&mut u) { + seen_types.insert(mt as u8); + } + } + println!( + "Generated {} distinct MessageType variants out of 19", + seen_types.len() + ); + + // --- ReplicaIdentity --- + println!("\n--- ReplicaIdentity ---"); + let mut seen_ri = std::collections::HashSet::new(); + for _ in 0..20 { + if let Ok(ri) = generators::arbitrary_replica_identity(&mut u) { + let byte = ri.to_byte(); + assert!( + byte == b'd' || byte == b'n' || byte == b'f' || byte == b'i', + "Invalid ReplicaIdentity byte: {}", + byte + ); + seen_ri.insert(byte); + } + } + println!( + "Generated {} distinct ReplicaIdentity variants out of 4", + seen_ri.len() + ); + + // --- CachePadded --- + println!("\n--- CachePadded ---"); + for i in 0..3 { + if let Ok(padded) = generators::arbitrary_cache_padded_u64(&mut u) { + println!(" [{i}] CachePadded value = {}", *padded); + } + } + + // --- ColumnData --- + println!("\n--- ColumnData ---"); + let mut saw_null = false; + let mut saw_text = false; + let mut saw_binary = false; + let mut saw_unchanged = false; + for _ in 0..30 { + if let Ok(cd) = generators::arbitrary_column_data(&mut u) { + if cd.is_null() { + saw_null = true; + } + if cd.is_text() { + saw_text = true; + } + if cd.is_binary() { + saw_binary = true; + } + if cd.is_unchanged() { + saw_unchanged = true; + } + let _bytes = cd.as_bytes(); + if cd.is_text() || cd.is_binary() { + let _s = cd.as_str(); + } + } + } + println!( + " null={saw_null} text={saw_text} binary={saw_binary} unchanged={saw_unchanged}" + ); + assert!( + saw_null || saw_text || saw_binary || saw_unchanged, + "Should produce at least one ColumnData variant" + ); + + // --- ColumnInfo --- + println!("\n--- ColumnInfo ---"); + for i in 0..3 { + if let Ok(ci) = generators::arbitrary_column_info(&mut u) { + println!( + " [{i}] name={:?} type_id={} is_key={}", + ci.name, + ci.type_id, + ci.is_key() + ); + } + } + + // --- TupleData --- + println!("\n--- TupleData ---"); + for i in 0..3 { + if let Ok(td) = generators::arbitrary_tuple_data(&mut u) { + println!(" [{i}] column_count={}", td.column_count()); + for j in 0..td.column_count() { + let _col = td.get_column(j); + } + } + } + + // --- RelationInfo --- + println!("\n--- RelationInfo ---"); + for i in 0..3 { + if let Ok(ri) = generators::arbitrary_relation_info(&mut u) { + println!( + " [{i}] full_name={:?} cols={} key_cols={}", + ri.full_name(), + ri.columns.len(), + ri.get_key_columns().len() + ); + } + } + + // --- LogicalReplicationMessage --- + println!("\n--- LogicalReplicationMessage ---"); + let mut variant_names = std::collections::HashSet::new(); + for _ in 0..100 { + if let Ok(msg) = generators::arbitrary_logical_replication_message(&mut u) { + let name = match msg { + LogicalReplicationMessage::Begin { .. } => "Begin", + LogicalReplicationMessage::Commit { .. } => "Commit", + LogicalReplicationMessage::Relation { .. } => "Relation", + LogicalReplicationMessage::Insert { .. } => "Insert", + LogicalReplicationMessage::Update { .. } => "Update", + LogicalReplicationMessage::Delete { .. } => "Delete", + LogicalReplicationMessage::Truncate { .. } => "Truncate", + LogicalReplicationMessage::Type { .. } => "Type", + LogicalReplicationMessage::Origin { .. } => "Origin", + LogicalReplicationMessage::Message { .. } => "Message", + LogicalReplicationMessage::StreamStart { .. } => "StreamStart", + LogicalReplicationMessage::StreamStop => "StreamStop", + LogicalReplicationMessage::StreamCommit { .. } => "StreamCommit", + LogicalReplicationMessage::StreamAbort { .. } => "StreamAbort", + LogicalReplicationMessage::BeginPrepare { .. } => "BeginPrepare", + LogicalReplicationMessage::Prepare { .. } => "Prepare", + LogicalReplicationMessage::CommitPrepared { .. } => "CommitPrepared", + LogicalReplicationMessage::RollbackPrepared { .. } => "RollbackPrepared", + LogicalReplicationMessage::StreamPrepare { .. } => "StreamPrepare", + }; + variant_names.insert(name); + } + } + println!( + "Generated {} distinct message variants out of 19: {:?}", + variant_names.len(), + variant_names + ); + assert!( + variant_names.len() > 1, + "Should produce diverse LogicalReplicationMessage variants" + ); + + // --- TupleData.to_hash_map roundtrip --- + println!("\n--- TupleData.to_hash_map roundtrip ---"); + if let (Ok(ri), Ok(td)) = ( + generators::arbitrary_relation_info(&mut u), + generators::arbitrary_tuple_data(&mut u), + ) { + let map = td.to_hash_map(&ri); + println!(" HashMap entries: {}", map.len()); + } + + println!("All pg_walstream types can be fuzz-generated externally."); +} From f169a56e05804332de1cf2a2b66e9654e8c845eb Mon Sep 17 00:00:00 2001 From: Danielshih Date: Sun, 15 Feb 2026 05:28:40 +0000 Subject: [PATCH 2/4] - Example refactor into independent bin folder. - Introduced a new example for safely consuming PostgreSQL replication messages. --- Cargo.lock | 131 +- Cargo.toml | 5 +- examples/README.md | 56 +- .../arbitrary-fuzzing/Cargo.lock | 0 .../arbitrary-fuzzing/Cargo.toml | 2 +- .../arbitrary-fuzzing/src/lib.rs | 0 .../arbitrary-fuzzing/src/main.rs | 0 examples/basic-streaming/Cargo.lock | 1127 ++++++++++++++++ examples/basic-streaming/Cargo.toml | 13 + .../src/main.rs} | 0 examples/pg-basebackup/Cargo.lock | 1086 ++++++++++++++++ examples/pg-basebackup/Cargo.toml | 14 + .../config/pg_hba.conf | 0 .../config/postgresql.conf | 0 .../src}/backup_flow.rs | 0 .../src/main.rs} | 2 - .../src}/tar.rs | 0 examples/polling/Cargo.lock | 1043 +++++++++++++++ examples/polling/Cargo.toml | 13 + .../src/main.rs} | 0 examples/rate-limited-streaming/Cargo.lock | 1139 +++++++++++++++++ examples/rate-limited-streaming/Cargo.toml | 13 + .../src/main.rs} | 0 examples/safe-transaction-consumer/Cargo.lock | 1043 +++++++++++++++ examples/safe-transaction-consumer/Cargo.toml | 12 + .../src/main.rs} | 0 26 files changed, 5548 insertions(+), 151 deletions(-) rename {tools => examples}/arbitrary-fuzzing/Cargo.lock (100%) rename {tools => examples}/arbitrary-fuzzing/Cargo.toml (82%) rename {tools => examples}/arbitrary-fuzzing/src/lib.rs (100%) rename {tools => examples}/arbitrary-fuzzing/src/main.rs (100%) create mode 100644 examples/basic-streaming/Cargo.lock create mode 100644 examples/basic-streaming/Cargo.toml rename examples/{basic_streaming.rs => basic-streaming/src/main.rs} (100%) create mode 100644 examples/pg-basebackup/Cargo.lock create mode 100644 examples/pg-basebackup/Cargo.toml rename examples/{pg_basebackup => pg-basebackup}/config/pg_hba.conf (100%) rename examples/{pg_basebackup => pg-basebackup}/config/postgresql.conf (100%) rename examples/{pg_basebackup => pg-basebackup/src}/backup_flow.rs (100%) rename examples/{pg_basebackup.rs => pg-basebackup/src/main.rs} (98%) rename examples/{pg_basebackup => pg-basebackup/src}/tar.rs (100%) create mode 100644 examples/polling/Cargo.lock create mode 100644 examples/polling/Cargo.toml rename examples/{polling_example.rs => polling/src/main.rs} (100%) create mode 100644 examples/rate-limited-streaming/Cargo.lock create mode 100644 examples/rate-limited-streaming/Cargo.toml rename examples/{rate_limited_streaming.rs => rate-limited-streaming/src/main.rs} (100%) create mode 100644 examples/safe-transaction-consumer/Cargo.lock create mode 100644 examples/safe-transaction-consumer/Cargo.toml rename examples/{safe_transaction_consumer.rs => safe-transaction-consumer/src/main.rs} (100%) diff --git a/Cargo.lock b/Cargo.lock index cf93b05..c37e77a 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -2,12 +2,6 @@ # It is not intended for manual editing. version = 4 -[[package]] -name = "adler2" -version = "2.0.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa" - [[package]] name = "aho-corasick" version = "1.1.4" @@ -134,15 +128,6 @@ version = "0.8.7" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b" -[[package]] -name = "crc32fast" -version = "1.5.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511" -dependencies = [ - "cfg-if", -] - [[package]] name = "either" version = "1.15.0" @@ -165,16 +150,6 @@ version = "0.1.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "3a3076410a55c90011c298b04d0cfa770b00fa04e1e3c97d3f6c9de105a03844" -[[package]] -name = "flate2" -version = "1.1.9" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "843fba2746e448b37e26a819579957415c8cef339bf08564fe8b7ddbd959573c" -dependencies = [ - "crc32fast", - "miniz_oxide", -] - [[package]] name = "futures" version = "0.3.31" @@ -379,15 +354,6 @@ version = "0.4.29" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897" -[[package]] -name = "matchers" -version = "0.2.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9" -dependencies = [ - "regex-automata", -] - [[package]] name = "memchr" version = "2.7.6" @@ -400,16 +366,6 @@ version = "0.2.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a" -[[package]] -name = "miniz_oxide" -version = "0.8.9" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316" -dependencies = [ - "adler2", - "simd-adler32", -] - [[package]] name = "mio" version = "1.1.1" @@ -431,15 +387,6 @@ dependencies = [ "minimal-lexical", ] -[[package]] -name = "nu-ansi-term" -version = "0.50.3" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5" -dependencies = [ - "windows-sys 0.61.2", -] - [[package]] name = "num-traits" version = "0.2.19" @@ -490,17 +437,14 @@ version = "0.3.0" dependencies = [ "bytes", "chrono", - "flate2", "futures", "libpq-sys", "serde", "serde_json", "thiserror", "tokio", - "tokio-stream", "tokio-util", "tracing", - "tracing-subscriber", ] [[package]] @@ -651,15 +595,6 @@ dependencies = [ "zmij", ] -[[package]] -name = "sharded-slab" -version = "0.1.7" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6" -dependencies = [ - "lazy_static", -] - [[package]] name = "shlex" version = "1.3.0" @@ -676,17 +611,11 @@ dependencies = [ "libc", ] -[[package]] -name = "simd-adler32" -version = "0.3.8" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "e320a6c5ad31d271ad523dcf3ad13e2767ad8b1cb8f047f75a8aeaf8da139da2" - [[package]] name = "slab" -version = "0.4.11" +version = "0.4.12" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "7a2ae44ef20feb57a68b23d846850f861394c2e02dc425a50098ae8c90267589" +checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5" [[package]] name = "smallvec" @@ -746,15 +675,6 @@ dependencies = [ "syn 2.0.111", ] -[[package]] -name = "thread_local" -version = "1.1.9" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185" -dependencies = [ - "cfg-if", -] - [[package]] name = "tokio" version = "1.49.0" @@ -783,17 +703,6 @@ dependencies = [ "syn 2.0.111", ] -[[package]] -name = "tokio-stream" -version = "0.1.18" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "32da49809aab5c3bc678af03902d4ccddea2a87d028d86392a4b1560c6906c70" -dependencies = [ - "futures-core", - "pin-project-lite", - "tokio", -] - [[package]] name = "tokio-util" version = "0.7.18" @@ -837,36 +746,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a" dependencies = [ "once_cell", - "valuable", -] - -[[package]] -name = "tracing-log" -version = "0.2.0" -source = "registry+https://github.com/rust-lang/crates.io-index" 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b/Cargo.toml index ef19659..6247d4a 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -27,8 +27,5 @@ thiserror = "2.0.18" default = [] [dev-dependencies] -tracing-subscriber = { version = "0.3", features = ["env-filter"] } -tokio = { version = "1.47.2", features = ["full"] } futures = "0.3.31" -tokio-stream = { version = "0.1.18", features = ["time"] } -flate2 = "1.1.9" \ No newline at end of file +tokio = { version = "1.47.2", features = ["full"] } diff --git a/examples/README.md b/examples/README.md index 6eccd40..30d3e6a 100644 --- a/examples/README.md +++ b/examples/README.md @@ -2,9 +2,18 @@ This directory contains examples demonstrating how to use the `pg_walstream` library to stream PostgreSQL Write-Ahead Log (WAL) changes. +Each example is an **independent binary project** with its own `Cargo.toml`, so example-specific dependencies (e.g. `futures`, `flate2`, `tokio-stream`) do not pollute `pg_walstream`'s `[dev-dependencies]`. + +## Running an Example + +```bash +cd examples/ +cargo run +``` + ## Examples -### 1. basic_streaming.rs +### 1. basic-streaming Demonstrates the high-level Stream API wrapped with `futures::stream::unfold` for Stream trait compatibility. @@ -17,12 +26,13 @@ Demonstrates the high-level Stream API wrapped with `futures::stream::unfold` fo **Run:** ```bash -cargo run --example basic_streaming +cd examples/basic-streaming +cargo run ``` -### 2. rate_limited_streaming.rs +### 2. rate-limited-streaming -**NEW**: Demonstrates rate limiting and flow control using futures::Stream combinators. +Demonstrates rate limiting and flow control using futures::Stream combinators. **Features:** - Rate limiting to prevent overwhelming downstream systems @@ -34,11 +44,11 @@ cargo run --example basic_streaming **Run:** ```bash -# Default: 10 events per second -cargo run --example rate_limited_streaming +cd examples/rate-limited-streaming +cargo run # Custom rate limit -MAX_EVENTS_PER_SECOND=50 cargo run --example rate_limited_streaming +MAX_EVENTS_PER_SECOND=50 cargo run ``` **Use Cases:** @@ -48,7 +58,7 @@ MAX_EVENTS_PER_SECOND=50 cargo run --example rate_limited_streaming - Controlled batch processing - Testing with realistic production loads -### 3. polling_example.rs +### 3. polling Shows the lower-level polling API for manual event retrieval. @@ -59,12 +69,13 @@ Shows the lower-level polling API for manual event retrieval. **Run:** ```bash -cargo run --example polling_example +cd examples/polling +cargo run ``` -### 4. safe_transaction_consumer.rs +### 4. safe-transaction-consumer -**NEW**: Advanced example demonstrating safe transaction processing with ordered commits. +Advanced example demonstrating safe transaction processing with ordered commits. **Features:** - Transaction buffering until commit @@ -77,7 +88,8 @@ cargo run --example polling_example **Run:** ```bash -cargo run --example safe_transaction_consumer +cd examples/safe-transaction-consumer +cargo run ``` **Use Cases:** @@ -86,9 +98,9 @@ cargo run --example safe_transaction_consumer - Implementing exactly-once processing semantics - Safe CDC (Change Data Capture) pipelines -### 5. pg_basebackup.rs +### 5. pg-basebackup -**NEW**: Complete implementation of pg_basebackup functionality for creating physical database backups. +Complete implementation of pg_basebackup functionality for creating physical database backups. **Features:** - Full physical backup of PostgreSQL cluster @@ -101,7 +113,11 @@ cargo run --example safe_transaction_consumer **Run:** ```bash -cargo run --example pg_basebackup +cd examples/pg-basebackup +cargo run + +# Or with custom backup directory: +BACKUP_DIR="/tmp/pg_basebackup" cargo run ``` **What It Does:** @@ -118,6 +134,16 @@ cargo run --example pg_basebackup - Database migrations and cloning - Automated backup solutions +### 6. arbitrary-fuzzing + +Demonstrates generating arbitrary `pg_walstream` types for fuzzing **without** modifying the library. + +**Run:** +```bash +cd examples/arbitrary-fuzzing +cargo run +``` + ## Prerequisites ### For Logical Replication Examples (basic_streaming, polling_example, safe_transaction_consumer) diff --git a/tools/arbitrary-fuzzing/Cargo.lock b/examples/arbitrary-fuzzing/Cargo.lock similarity index 100% rename from tools/arbitrary-fuzzing/Cargo.lock rename to examples/arbitrary-fuzzing/Cargo.lock diff --git a/tools/arbitrary-fuzzing/Cargo.toml b/examples/arbitrary-fuzzing/Cargo.toml similarity index 82% rename from tools/arbitrary-fuzzing/Cargo.toml rename to examples/arbitrary-fuzzing/Cargo.toml index 153e63a..3cdc0dc 100644 --- a/tools/arbitrary-fuzzing/Cargo.toml +++ b/examples/arbitrary-fuzzing/Cargo.toml @@ -7,4 +7,4 @@ description = "Demonstrates external arbitrary generation for pg_walstream types [dependencies] pg_walstream = { path = "../.." } -arbitrary = { version = "1", features = ["derive"] } +arbitrary = { version = "1.4.2", features = ["derive"] } \ No newline at end of file diff --git a/tools/arbitrary-fuzzing/src/lib.rs 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a/examples/pg_basebackup/config/postgresql.conf b/examples/pg-basebackup/config/postgresql.conf similarity index 100% rename from examples/pg_basebackup/config/postgresql.conf rename to examples/pg-basebackup/config/postgresql.conf diff --git a/examples/pg_basebackup/backup_flow.rs b/examples/pg-basebackup/src/backup_flow.rs similarity index 100% rename from examples/pg_basebackup/backup_flow.rs rename to examples/pg-basebackup/src/backup_flow.rs diff --git a/examples/pg_basebackup.rs b/examples/pg-basebackup/src/main.rs similarity index 98% rename from examples/pg_basebackup.rs rename to examples/pg-basebackup/src/main.rs index a4817b9..84f6b07 100644 --- a/examples/pg_basebackup.rs +++ b/examples/pg-basebackup/src/main.rs @@ -60,9 +60,7 @@ //! └── tablespaces/ # Additional tablespace tar files (if any) //! ``` -#[path = "pg_basebackup/backup_flow.rs"] mod backup_flow; -#[path = "pg_basebackup/tar.rs"] mod tar; use backup_flow::process_backup_stream; diff --git 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similarity index 100% rename from examples/safe_transaction_consumer.rs rename to examples/safe-transaction-consumer/src/main.rs From f08511fba4f55c17bf4195eb55419102da803c9e Mon Sep 17 00:00:00 2001 From: Danielshih Date: Sun, 15 Feb 2026 05:34:37 +0000 Subject: [PATCH 3/4] Add _typos.toml to extend words with legitimate Rust crate names --- _typos.toml | 3 +++ 1 file changed, 3 insertions(+) create mode 100644 _typos.toml diff --git a/_typos.toml b/_typos.toml new file mode 100644 index 0000000..711a587 --- /dev/null +++ b/_typos.toml @@ -0,0 +1,3 @@ +[default.extend-words] +# "flate2" is a legitimate Rust crate name +flate = "flate" \ No newline at end of file From de1d82ae8ef7e34b48e2ee62f59f22f28139f1bc Mon Sep 17 00:00:00 2001 From: Danielshih Date: Sun, 15 Feb 2026 05:46:46 +0000 Subject: [PATCH 4/4] Remove futures dependency and update stream documentation to ignore code block --- Cargo.lock | 84 --------------------------------------------------- Cargo.toml | 1 - src/stream.rs | 2 +- 3 files changed, 1 insertion(+), 86 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index c37e77a..3c1ebb8 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -150,95 +150,24 @@ version = "0.1.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "3a3076410a55c90011c298b04d0cfa770b00fa04e1e3c97d3f6c9de105a03844" -[[package]] -name = "futures" -version = "0.3.31" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "65bc07b1a8bc7c85c5f2e110c476c7389b4554ba72af57d8445ea63a576b0876" -dependencies = [ - "futures-channel", - "futures-core", - "futures-executor", - "futures-io", - "futures-sink", - "futures-task", - "futures-util", -] - -[[package]] -name = "futures-channel" -version = "0.3.31" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "2dff15bf788c671c1934e366d07e30c1814a8ef514e1af724a602e8a2fbe1b10" -dependencies = [ - "futures-core", - "futures-sink", -] - [[package]] name = "futures-core" version = 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a/src/stream.rs +++ b/src/stream.rs @@ -1431,7 +1431,7 @@ impl LogicalReplicationStream { /// If you need to use stream combinators from the `futures` crate, you can easily /// wrap this with `futures::stream::unfold`: /// -/// ```no_run +/// ```ignore /// use pg_walstream::{LogicalReplicationStream, ReplicationStreamConfig, RetryConfig, StreamingMode}; /// use tokio_util::sync::CancellationToken; /// use futures::stream::{self, StreamExt};