infrastructure-cache

Caching layer with pluggable backends (Redis, memory, PostgreSQL)

Tier	infrastructure
Role	unclassified (baselined)
Path	`crates/infrastructure/cache`
Edition	2021
Targets	infrastructure_cache
Public items	12 across 1 module
Tests	8

What it is for

Caching layer with pluggable backends (Redis, memory).

Capabilities

`crate root`

Caching layer with pluggable backends (Redis, memory).

Item
`pub const DEFAULT_TTL: Duration`

`MemoryCache`

In-memory cache backend using DashMap.

Item
`pub struct MemoryCache`
`MemoryCache :: fn default() -> Self`
`MemoryCache :: fn new() -> Self`
`MemoryCache :: fn len(& self) -> usize`
`MemoryCache :: fn is_empty(& self) -> bool`
`MemoryCache :: async fn get <T : DeserializeOwned + Send>(& self, key : & str) -> Result <Option <T>, CacheError>`
`MemoryCache :: async fn set <T : Serialize + Send + Sync>(& self, key : & str, value : & T, ttl : Option <Duration>,) -> Result <(), CacheError>`
`MemoryCache :: async fn delete(& self, key : & str) -> Result <(), CacheError>`
`MemoryCache :: async fn exists(& self, key : & str) -> Result <bool, CacheError>`
`MemoryCache :: async fn clear(& self) -> Result <(), CacheError>`
`MemoryCache :: async fn get_or_set <T, F, Fut>(& self, key : & str, ttl : Option <Duration>, f : F,) -> Result <T, CacheError> where T : Serialize + DeserializeOwned + Send + Sync, F : FnOnce() -> Fut + Send, Fut : Future <Output = Result <T, CacheError>> + Send,`

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

infrastructure_cache

memory

Public surface

`crate root`

Item	What it is
`pub const DEFAULT_TTL: Duration`	Default TTL for cache entries (1 hour).

`memory`

Item	What it is
`pub struct MemoryCache`	In-memory cache backed by `DashMap`
`MemoryCache :: fn default() -> Self`	—
`MemoryCache :: fn new() -> Self`	Creates a new empty memory cache.
`MemoryCache :: fn len(& self) -> usize`	Returns the number of entries in the cache
`MemoryCache :: fn is_empty(& self) -> bool`	Returns true if the cache is empty.
`MemoryCache :: async fn get <T : DeserializeOwned + Send>(& self, key : & str) -> Result <Option <T>, CacheError>`	—
`MemoryCache :: async fn set <T : Serialize + Send + Sync>(& self, key : & str, value : & T, ttl : Option <Duration>,) -> Result <(), CacheError>`	—
`MemoryCache :: async fn delete(& self, key : & str) -> Result <(), CacheError>`	—
`MemoryCache :: async fn exists(& self, key : & str) -> Result <bool, CacheError>`	—
`MemoryCache :: async fn clear(& self) -> Result <(), CacheError>`	—
`MemoryCache :: async fn get_or_set <T, F, Fut>(& self, key : & str, ttl : Option <Duration>, f : F,) -> Result <T, CacheError> where T : Serialize + DeserializeOwned + Send + Sync, F : FnOnce() -> Fut + Send, Fut : Future <Output = Result <T, CacheError>> + Send,`	—

Re-exports. Exported here, defined elsewhere.

Export	Defined in
`CacheBackend`	`backend::CacheBackend`
`CacheError`	`error::CacheError`
`MemoryCache`	`memory::MemoryCache`

Boundary

Reaches into foundation.

Shares tier infrastructure with 82 other crates: infrastructure-acquire, infrastructure-adapters-google-calendar, infrastructure-adapters-google-gmail, infrastructure-adapters-google-places, infrastructure-adapters-google-trends, infrastructure-adapters-shodan, infrastructure-adapters-yelp, infrastructure-agent, … (82 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`infrastructure`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/infrastructure/cache`
Vocabulary in force (lexicon)	`current`

Tier flow. Which tiers this crate's own edges cross.

flowchart LR
  n_infrastructure["infrastructure"] --> n_foundation["foundation"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`foundation-basemodels`	foundation	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`async-trait`	`^0.1`	—	no	always
`chrono`	`^0.4`	`serde`	no	always
`dashmap`	`^6`	—	no	always
`redis`	`^0.27`	`tokio-comp`	yes	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`sqlx`	`^0.8`	`runtime-tokio`, `postgres`, `chrono`, `uuid`, `json`	no	always
`thiserror`	`^2`	—	no	always
`tokio`	`^1`	`full`	no	always
`uuid`	`^1`	`v4`, `v7`, `serde`, `js`	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`tokio-test`	`^0.4`	—	no	always

Build. None.

Depended on by. 1 workspace crate.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  n_application_cache["application-cache"] -->|uses| SELF
  SELF["infrastructure-cache"]
  SELF -->|runtime| n_foundation_basemodels["foundation-basemodels"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

Feature	Enables	On by default
`default`	—	yes
`redis`	`dep:redis`	no

flowchart LR
  n_default["default"]
  n_redis["redis"] --> n_dep_redis["dep:redis"]

Targets

Kind	Name	Source
lib	`infrastructure_cache`	`src/lib.rs`

Error model

No public error type was detected: no public item declares a type named *Error, and no public signature returns one.

Operational characteristics

Property	Evidence
async public surface	yes
async runtime	yes
database access	yes
network I/O	none detected
unsafe code	none detected
environment variables	none detected

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

1 workspace crate depends on this one: application-cache.

Verification

Kind	Count
Unit tests	8
Integration tests	0
Examples	0
Doctests	0

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`crate root`	1	0	0
`memory`	1	0	1

What the tests establish, by name:

test_memory_cache_clear — src/lib.rs
test_memory_cache_complex_types — src/lib.rs
test_memory_cache_delete — src/lib.rs
test_memory_cache_exists — src/lib.rs
test_memory_cache_get_missing_key — src/lib.rs
test_memory_cache_get_or_set — src/lib.rs
test_memory_cache_get_set — src/lib.rs
test_memory_cache_ttl_expiration — src/lib.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	5	12
Public modules with a `//!` block	1	1

pie showData
    title Public items with rustdoc
    "Documented" : 5
    "No rustdoc detected" : 7

Metrics

Metric	Value
Rust source files	4
Source lines	420
Code lines	272
Public API items	12
Public modules	1
Tests	8
Examples	0
Cargo features	2
Direct runtime dependencies	11
Workspace reverse dependencies	1

pie showData
    title Public API by kind
    "constant" : 1
    "method" : 10
    "struct" : 1

pie showData
    title Rust source composition
    "Code" : 272
    "Blank or comment" : 148

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.