hammerwork 1.4.0

A high-performance, database-driven job queue for Rust with PostgreSQL and MySQL support, featuring job prioritization, cron scheduling, timeouts, rate limiting, Prometheus metrics, alerting, and comprehensive statistics collection
Documentation
# Hammerwork Roadmap

This roadmap outlines planned features for Hammerwork, prioritized by impact level and implementation complexity. Features are organized into phases based on their value proposition to users and estimated development effort.

## Phase 2: Medium Impact, Variable Complexity
*Valuable features for specific use cases or operational efficiency*

### 🔌 Webhook & Event Streaming
**Impact: Medium** | **Complexity: Medium** | **Priority: Medium**

Important for integration with external systems and real-time notifications.

```rust
// Real-time job events via webhooks
let webhook_config = WebhookConfig::new()
    .url("https://api.example.com/job-events")
    .events(vec![JobEvent::Completed, JobEvent::Failed])
    .with_retry_policy(RetryPolicy::exponential());

// Event streaming to external systems
let event_stream = EventStream::new()
    .to_kafka("job-events")
    .to_kinesis("job-stream")
    .with_filtering(|event| event.priority >= JobPriority::High);
```

### 📡 Real-time Archive WebSocket Events
**Impact: Low-Medium** | **Complexity: Low** | **Priority: Low**

Enhance the web dashboard with real-time updates for archive operations.

```rust
// WebSocket events for archive operations
#[derive(Serialize)]
enum ArchiveEvent {
    JobArchived { job_id: JobId, queue: String, reason: ArchivalReason },
    JobRestored { job_id: JobId, queue: String, restored_by: Option<String> },
    BulkArchiveStarted { operation_id: String, estimated_jobs: u64 },
    BulkArchiveProgress { operation_id: String, jobs_processed: u64, total: u64 },
    BulkArchiveCompleted { operation_id: String, stats: ArchivalStats },
    JobsPurged { count: u64, older_than: DateTime<Utc> },
}

// Real-time dashboard updates
websocket.send_event(ArchiveEvent::JobArchived {
    job_id: job.id,
    queue: job.queue_name.clone(),
    reason: ArchivalReason::Automatic,
});
```

**Benefits:**
- Live archive operation progress tracking
- Instant UI updates when jobs are archived/restored
- Real-time compression ratio and storage statistics
- Enhanced user experience during bulk operations

## Phase 3: Specialized Features
*Features for specific enterprise or compliance requirements*

### 🔐 Job Encryption & PII Protection
**Impact: Medium** | **Complexity: High** | **Priority: Low-Medium**

Critical for organizations with strict data protection requirements.

```rust
// Encrypt sensitive job payloads
let job = Job::new("process_payment".to_string(), payment_data)
    .with_encryption(EncryptionConfig::AES256)
    .with_pii_fields(vec!["credit_card", "ssn"])
    .with_retention_policy(RetentionPolicy::DeleteAfter(Duration::from_days(7)));
```

### 🛡️ Access Control & Auditing
**Impact: Medium** | **Complexity: High** | **Priority: Low-Medium**

Required for enterprise environments with compliance requirements.

```rust
// Role-based access control
let worker = Worker::new(queue, "sensitive_queue".to_string(), handler)
    .with_required_permissions(vec!["process_payments", "read_user_data"])
    .with_audit_logging(true);

// Audit trail
let audit_log = queue.get_audit_log(&job_id).await?;
```

### 🔗 Message Queue Integration
**Impact: Medium** | **Complexity: Medium** | **Priority: Low-Medium**

Valuable for organizations migrating from other queue systems.

```rust
// Integration with external message queues
let bridge = MessageBridge::new()
    .from_rabbitmq("amqp://localhost")
    .to_hammerwork_queue("external_jobs")
    .with_transform(|msg| Job::from_message(msg));
```

## Phase 4: Advanced Scaling Features
*Complex features primarily for large-scale deployments*

### 🚀 Zero-downtime Deployments
**Impact: High** | **Complexity: Very High** | **Priority: Low**

Critical for large-scale production systems but complex to implement correctly.

```rust
// Graceful job migration during deployments
let migration = JobMigration::new()
    .drain_workers(Duration::from_minutes(5))
    .migrate_pending_jobs("old_queue", "new_queue")
    .with_rollback_capability();
```

### 🗂️ Queue Partitioning & Sharding
**Impact: High** | **Complexity: Very High** | **Priority: Low**

Essential for massive scale but adds significant complexity.

```rust
// Partition jobs across multiple databases
let queue = PartitionedQueue::new()
    .add_partition("shard1", postgres_pool1)
    .add_partition("shard2", postgres_pool2)
    .with_partitioning_strategy(PartitionStrategy::Hash("user_id"));
```

### 🌍 Multi-region Support
**Impact: Medium** | **Complexity: Very High** | **Priority: Low**

Important for global deployments but extremely complex to implement reliably.

```rust
// Cross-region job replication
let geo_config = GeoReplicationConfig::new()
    .primary_region("us-east-1")
    .replica_regions(vec!["us-west-2", "eu-west-1"])
    .with_failover_policy(FailoverPolicy::Automatic);
```

## Implementation Priority

Features are ordered within each phase by priority and should generally be implemented in the following sequence:

**Phase 1 (Operational Features)**
2. Webhook & Event Streaming

**Phase 2 (Enterprise Features)**
1. Job Encryption & PII Protection
2. Access Control & Auditing
3. Message Queue Integration

**Phase 3 (Scaling Features)**
1. Zero-downtime Deployments
2. Queue Partitioning & Sharding
3. Multi-region Support

## Contributing

We welcome contributions to any of these roadmap items! Please:

1. Open an issue to discuss the feature before implementation
2. Review the [CONTRIBUTING.md]CONTRIBUTING.md guidelines
3. Consider starting with Phase 1 (Advanced Features) for maximum impact
4. Ensure comprehensive tests and documentation for new features

## Feedback

This roadmap is based on anticipated user needs and common job queue patterns. If you have specific requirements or would like to prioritize certain features, please:

- Open a GitHub issue with the `enhancement` label
- Join our community discussions
- Share your use case and requirements

The roadmap will be updated based on user feedback and changing requirements.