Layer 2 — application architecture · 1,820 documents
| ID | Document | Source |
|---|---|---|
| app_invariants__4417beb1f9b5385a | INVARIANT: Schema versions must maintain strict monotonic increase. SHADOW: The system requires that newer schemas possess a version integer greater than the predecessor. This absolute ordering… | — |
| app_invariants__cd82f86ae1539039 | INVARIANT: Schema projection is restricted to widening primitive promotions or exact metadata matches. SHADOW: The SchemaProjector forbids any operation that would lose precision or mismatch… | — |
| app_invariants__05551623b991978f | INVARIANT: Error reporting to the Dead Letter Queue must complete before consumer offset commitment. SHADOW: The ErrantRecordReporter creates an unbreakable gate: a sink task cannot acknowledge the… | — |
| app_invariants__b6a66c36a1f163aa | INVARIANT: Replication hops must be finite and cyclic-detected to prevent infinite message loops. SHADOW: MirrorClient tracks 'visited' cluster aliases during hop counting. This is the primary… | — |
| app_invariants__726017b794ad5fea | INVARIANT: Memory buffers for stream ingestion must be elastic and doubling to prevent data loss. SHADOW: When a single record exceeds the current buffer capacity (e.g., in FileStreamSourceTask),… | — |
| app_invariants__d556986f90c5c813 | INVARIANT: External offset overrides must be deterministic and side-effect free. SHADOW: The SinkConnector.alterOffsets API is architecturally defined as idempotent. This ensures that administrative… | — |
| app_invariants__bc73a73ba96fe371 | INVARIANT: Transformation logic must be deterministic and repeatable across record batches. SHADOW: Ensures that applying the same transformation to the same record multiple times yields the same… | — |
| app_invariants__6d2bc1ca5d928342 | INVARIANT: Schema metadata and transformation state must be cached and synchronized. SHADOW: Caching schema structures prevents redundant computation and ensures consistency during record… | — |
| app_invariants__593c7da21a609a6d | INVARIANT: Configuration validation must occur at the boundary of transformation initialization. SHADOW: Prevents invalid configurations from propagating into the processing pipeline, protecting… | — |
| app_invariants__cbac1d3388b49de6 | INVARIANT: Record transformation must treat the record as an immutable unit, producing a new record instance. SHADOW: Preserves the integrity of the original record stream while allowing for safe,… | — |
| app_invariants__3d5df7c436439a8f | INVARIANT: Generation-Fenced State Transitions SHADOW: Every member of a consumer group is bound to a monotonic generation ID. Any action (commit, assignment, heartbeat) performed against a stale… | — |
| app_invariants__645b5d3b3c83b026 | INVARIANT: Subscription Mode Mutual Exclusion SHADOW: The SubscriptionState enforces a strict hierarchy where AUTO_TOPICS, AUTO_PATTERN, and USER_ASSIGNED modes are mutually exclusive. This prevents… | — |
| app_invariants__72cc00a5992e5d6b | INVARIANT: Decoupled Event-Loop Orchestration SHADOW: The AsyncKafkaConsumer architecture separates the application thread (user logic) from the network thread (I/O) via a dual-queue system… | — |
| app_invariants__ab5a5cd0111e777c | INVARIANT: Epoch-Aware Offset Validation SHADOW: Offsets are not just numbers; they are validated against Leader Epochs. If a partition leader changes, the consumer must verify that its current… | — |
| app_invariants__32fb056dd959e73c | INVARIANT: Share-Group Acknowledgement Lifecycle SHADOW: In Share Groups, record delivery is treated as a stateful transaction (Acquired -> Acknowledged/Released). The AcknowledgementBatch ensures… | — |
| app_invariants__6ecef01df8ddc2a3 | INVARIANT: Atomic Wakeup Signaling SHADOW: The WakeupTrigger provides a thread-safe mechanism to interrupt blocking I/O or wait states. It ensures that a 'wakeup' signal is either immediately acted… | — |
| app_invariants__c6874af62527b2a2 | INVARIANT: Sticky Persistence of Partition Ownership SHADOW: The StickyAssignor and CooperativeStickyAssignor prioritize 'stickiness' by encoding previous assignments into member metadata. This… | — |
| app_invariants__8fa8598e53167ee5 | INVARIANT: Durable Metadata Refresh Constraints SHADOW: Metadata is treated as a transient but authoritative cache. The ConsumerMetadata class enforces refresh intervals and 'transient topic'… | — |
| app_invariants__a38c523e90218839 | INVARIANT: Resource consumption is bounded by Token Bucket algorithms and explicit throttle times embedded in all protocol responses. SHADOW: Prevents broker exhaustion and ensures fair multi-tenant… | — |
| app_invariants__d08f265425722830 | INVARIANT: Cluster state transitions require quorum acknowledgment through explicit voting and epoch bumping (e.g., VoteRequest, BeginQuorumEpochRequest). SHADOW: Guarantees a single source of truth… | — |
| app_invariants__a5775730c43fe587 | INVARIANT: Multi-partition writes are finalized via explicit transaction markers that atomically commit or abort the pending state across all involved partitions. SHADOW: Ensures that downstream… | — |
| app_invariants__d03a02a2e60952b9 | INVARIANT: Producers are assigned unique identifiers and sequence numbers to deduplicate retried requests at the partition level. SHADOW: Provides exactly-once semantics (EOS) by allowing the broker… | — |
| app_invariants__1d29556d453d1306 | INVARIANT: Data is persisted and transferred in immutable, checksummed batches with strict memory, offset, and epoch boundaries. SHADOW: Maximizes I/O efficiency through zero-copy transfers and… | — |
| app_invariants__ca57f0e46927f217 | INVARIANT: Direct memory buffers must be deterministically unmapped via internal Unsafe APIs to prevent off-heap OOM. SHADOW: Relying on the JVM garbage collector to clean up direct ByteBuffers… | — |
| app_invariants__6ada25cc07612302 | INVARIANT: Memory pools must track allocations using WeakReferences and a ReferenceQueue to reclaim leaked buffers. SHADOW: If a consumer of the memory pool forgets to release a buffer, the pool's… | — |
| app_invariants__9ff1bd0aac61bb60 | INVARIANT: Retry intervals must scale exponentially and incorporate randomized jitter within a defined boundary. SHADOW: Strict exponential backoff synchronizes retries across distributed clients,… | — |
| app_invariants__59b29efcf991b8a4 | INVARIANT: Hash collections for high-throughput paths must embed linked-list pointers directly within the elements. SHADOW: Standard Java collections allocate wrapper objects (like Map.Entry) for… | — |
| app_invariants__87938efd06fc82d9 | INVARIANT: Concurrent maps optimized for read-heavy workloads must duplicate the underlying state on mutation. SHADOW: Locking a map for reads creates contention. By replacing the entire map… | — |
| app_invariants__e62b19ae5aa0a62c | INVARIANT: Integer serialization must use variable-length encoding (Base-128) to minimize network payload size. SHADOW: Fixed-size integers waste bytes for small values. Varint encoding uses the MSB… | — |
| app_invariants__39eaa0e144285734 | INVARIANT: A topic, if present, is consistently identifiable by its name and its unique identifier (UUID), maintaining a strict one-to-one bidirectional mapping. Operations that modify or retrieve… | — |
| app_invariants__5e070f6c4bcc9f25 | INVARIANT: All simulated topological entities (controller, partition leaders, replica sets, in-sync replica sets) must be valid references to active broker nodes within the system's defined broker… | — |
| app_invariants__ae902f75c7abe20b | INVARIANT: All operations that modify the internal, shared state of the system must execute under exclusive access, preventing concurrent modifications that could lead to data corruption or… | — |
| app_invariants__619042fdfdb2fd18 | INVARIANT: Every topic registered within the system must possess a unique name, ensuring unambiguous identification and preventing naming collisions for client operations. SHADOW: Prevents logical… | — |
| app_invariants__b059b9fdb57be0e3 | INVARIANT: Topics may transition through a 'marked for deletion' state or exhibit delayed visibility after creation, reflecting eventual consistency or soft-delete semantics in a distributed system,… | — |
| app_invariants__54f3444c2e0417aa | INVARIANT: Incremental configuration alterations for a given resource (broker, topic, client metrics, group) must be applied as a single, atomic replacement of the entire configuration set for that… | — |
| app_invariants__40477618041d9e9d | INVARIANT: A bounded memory pool must strictly account for allocated versus unallocated bytes, blocking or rejecting requests that exceed available capacity until prior allocations are… | — |
| app_invariants__c47c12c193ce1571 | INVARIANT: Liveness is proven through periodic heartbeat signals; failure to renew the lease within the strict session timeout boundary results in deterministic eviction. SHADOW: Ensures that dead,… | — |
| app_invariants__e881e2bba9e68e8a | INVARIANT: Asynchronous operations must be bound by a strict temporal deadline, after which uncompleted operations are deterministically reaped to prevent resource exhaustion. SHADOW: Prevents… | — |
| app_invariants__cfc8b944f7e06148 | INVARIANT: Stateless distribution algorithms must yield a uniform spread across available nodes, while stateful (sticky) algorithms must maintain affinity until a deterministic threshold forces a… | — |
| app_invariants__9af296724d51726d | INVARIANT: Transactional state must be uniquely identifiable by a monotonically increasing epoch and producer ID, ensuring strict isolation and fencing of zombie writers. SHADOW: Guarantees… | — |
| app_invariants__4fd9198f8268cd43 | INVARIANT: A producer batch must transition to a terminal state (completed or aborted) exactly once to guarantee that every record's outcome is resolved without ambiguity. SHADOW: This ensures that… | — |
| app_invariants__14f165946ea3470a | INVARIANT: Internal state collections, such as cluster topology or security extensions, must be exposed externally only as unmodifiable views to protect against uncontrolled concurrent… | — |
| app_invariants__f447593b26e9e595 | INVARIANT: A mandatory, configurable delay must be enforced after a failed authentication attempt to mitigate brute-force and denial-of-service attacks by rate-limiting login requests. SHADOW: This… | — |
| app_invariants__028f2da2b8cb9e70 | INVARIANT: A resource's closure operation must be idempotent, ensuring that the underlying resource-release logic is executed exactly once, regardless of how many times the close method is… | — |
| app_invariants__9d8400fe43f37c70 | INVARIANT: For any given data object, the process of serialization followed by deserialization must yield an object that is equal to the original, ensuring perfect data fidelity. SHADOW: This… | — |
| app_invariants__08d0031a5813dd2a | INVARIANT: Transient I/O failures must trigger a retry mechanism governed by an exponential backoff strategy, bounded by a maximum wait time, to gracefully handle temporary network… | — |
| app_invariants__05db1a36fff37f01 | INVARIANT: Sensor hierarchy must be a directed acyclic graph (DAG) where child removal cascades correctly. SHADOW: The architectural requirement ensures that hierarchical monitoring state does not… | — |
| app_invariants__45100409da2fa604 | INVARIANT: Sensor expiration tasks must be idempotent regarding sensor removal. SHADOW: Periodic background tasks prune inactive sensors to prevent unbounded state growth in the heap. The design… | — |
| app_invariants__89b755745bad640d | INVARIANT: Metric registration is protected against race conditions in concurrent registration environments. SHADOW: The system uses atomic or thread-safe primitives to manage the registry of… | — |
| app_invariants__fd6e91417ff8c32b | INVARIANT: Quota enforcement must trigger synchronous exceptions upon threshold violation during recording. SHADOW: When a metric recorded via a sensor exceeds a defined quota, the system must… | — |