"""
Pattern 277: Release Management

Purpose: Release coordination, orchestration, and automated rollback
"""

from typing import Dict, Any, List, Optional, Set
from dataclasses import dataclass, field
from datetime import datetime
from enum import Enum
from collections import defaultdict


class ReleaseStage(Enum):
    """Stage of release lifecycle."""
    PLANNING = "planning"
    TESTING = "testing"
    STAGING = "staging"
    DEPLOYMENT = "deployment"
    VERIFICATION = "verification"
    COMPLETED = "completed"
    ROLLED_BACK = "rolled_back"
    FAILED = "failed"


class ReleaseType(Enum):
    """Type of release."""
    MAJOR = "major"
    MINOR = "minor"
    PATCH = "patch"
    HOTFIX = "hotfix"
    EMERGENCY = "emergency"


class ComponentStatus(Enum):
    """Status of release component."""
    PENDING = "pending"
    DEPLOYING = "deploying"
    DEPLOYED = "deployed"
    FAILED = "failed"
    ROLLED_BACK = "rolled_back"


@dataclass
class ReleaseComponent:
    """Component in a release."""
    name: str
    version: str
    status: ComponentStatus
    deployment_order: int
    dependencies: List[str] = field(default_factory=list)
    deployed_at: Optional[datetime] = None
    error_message: Optional[str] = None


@dataclass
class ReleaseCheckpoint:
    """Checkpoint during release."""
    stage: ReleaseStage
    timestamp: datetime
    status: str
    details: str
    can_rollback: bool = True


@dataclass
class Release:
    """Represents a release."""
    release_id: str
    version: str
    release_type: ReleaseType
    stage: ReleaseStage
    components: Dict[str, ReleaseComponent]
    created_at: datetime = field(default_factory=datetime.now)
    started_at: Optional[datetime] = None
    completed_at: Optional[datetime] = None
    checkpoints: List[ReleaseCheckpoint] = field(default_factory=list)
    metadata: Dict[str, Any] = field(default_factory=dict)


class ReleaseManagement:
    """
    Implements release management pattern.
    
    Features:
    - Multi-component coordination
    - Staged deployment process
    - Dependency management
    - Automated verification
    - Rollback capability
    - Release history tracking
    - Checkpoint management
    """
    
    def __init__(self):
        self.releases: Dict[str, Release] = {}
        self.active_release: Optional[str] = None
        self.release_history: List[str] = []
        
        # Statistics
        self.statistics = {
            "total_releases": 0,
            "successful_releases": 0,
            "failed_releases": 0,
            "rolled_back_releases": 0,
            "total_components_deployed": 0
        }
    
    def create_release(
        self,
        release_id: str,
        version: str,
        release_type: ReleaseType,
        components: List[Dict[str, Any]],
        metadata: Optional[Dict[str, Any]] = None
    ) -> Dict[str, Any]:
        """
        Create a new release.
        
        Args:
            release_id: Unique release identifier
            version: Release version
            release_type: Type of release
            components: List of components with name, version, order, dependencies
            metadata: Additional metadata
            
        Returns:
            Status of release creation
        """
        if release_id in self.releases:
            return {
                "success": False,
                "message": f"Release {release_id} already exists"
            }
        
        # Create components
        release_components = {}
        for comp in components:
            component = ReleaseComponent(
                name=comp["name"],
                version=comp["version"],
                status=ComponentStatus.PENDING,
                deployment_order=comp.get("order", 0),
                dependencies=comp.get("dependencies", [])
            )
            release_components[comp["name"]] = component
        
        # Validate dependencies
        for comp_name, component in release_components.items():
            for dep in component.dependencies:
                if dep not in release_components:
                    return {
                        "success": False,
                        "message": f"Component {comp_name} depends on {dep} which is not in release"
                    }
        
        release = Release(
            release_id=release_id,
            version=version,
            release_type=release_type,
            stage=ReleaseStage.PLANNING,
            components=release_components,
            metadata=metadata or {}
        )
        
        self.releases[release_id] = release
        self.statistics["total_releases"] += 1
        
        # Add checkpoint
        checkpoint = ReleaseCheckpoint(
            stage=ReleaseStage.PLANNING,
            timestamp=datetime.now(),
            status="created",
            details=f"Release {release_id} created with {len(components)} components"
        )
        release.checkpoints.append(checkpoint)
        
        return {
            "success": True,
            "release_id": release_id,
            "version": version,
            "components": len(components),
            "message": f"Release {release_id} created successfully"
        }
    
    def start_release(self, release_id: str) -> Dict[str, Any]:
        """
        Start a release deployment.
        
        Args:
            release_id: Release identifier
            
        Returns:
            Status of release start
        """
        if release_id not in self.releases:
            return {
                "success": False,
                "message": f"Release {release_id} not found"
            }
        
        if self.active_release:
            return {
                "success": False,
                "message": f"Another release {self.active_release} is already active"
            }
        
        release = self.releases[release_id]
        
        if release.stage != ReleaseStage.PLANNING:
            return {
                "success": False,
                "message": f"Release is in {release.stage.value} stage, cannot start"
            }
        
        self.active_release = release_id
        release.started_at = datetime.now()
        release.stage = ReleaseStage.TESTING
        
        # Add checkpoint
        checkpoint = ReleaseCheckpoint(
            stage=ReleaseStage.TESTING,
            timestamp=datetime.now(),
            status="started",
            details=f"Release {release_id} started"
        )
        release.checkpoints.append(checkpoint)
        
        return {
            "success": True,
            "release_id": release_id,
            "stage": release.stage.value,
            "message": f"Release {release_id} started"
        }
    
    def advance_stage(self, release_id: str) -> Dict[str, Any]:
        """
        Advance release to next stage.
        
        Args:
            release_id: Release identifier
            
        Returns:
            Status of stage advancement
        """
        if release_id not in self.releases:
            return {
                "success": False,
                "message": f"Release {release_id} not found"
            }
        
        release = self.releases[release_id]
        current_stage = release.stage
        
        # Define stage progression
        stage_progression = {
            ReleaseStage.TESTING: ReleaseStage.STAGING,
            ReleaseStage.STAGING: ReleaseStage.DEPLOYMENT,
            ReleaseStage.DEPLOYMENT: ReleaseStage.VERIFICATION,
            ReleaseStage.VERIFICATION: ReleaseStage.COMPLETED
        }
        
        if current_stage not in stage_progression:
            return {
                "success": False,
                "message": f"Cannot advance from {current_stage.value} stage"
            }
        
        next_stage = stage_progression[current_stage]
        release.stage = next_stage
        
        # Add checkpoint
        checkpoint = ReleaseCheckpoint(
            stage=next_stage,
            timestamp=datetime.now(),
            status="advanced",
            details=f"Advanced from {current_stage.value} to {next_stage.value}"
        )
        release.checkpoints.append(checkpoint)
        
        # If deployment stage, deploy components
        if next_stage == ReleaseStage.DEPLOYMENT:
            self._deploy_components(release)
        
        # If completed, finalize
        if next_stage == ReleaseStage.COMPLETED:
            release.completed_at = datetime.now()
            self.active_release = None
            self.release_history.append(release_id)
            self.statistics["successful_releases"] += 1
        
        return {
            "success": True,
            "release_id": release_id,
            "previous_stage": current_stage.value,
            "current_stage": next_stage.value,
            "message": f"Advanced to {next_stage.value} stage"
        }
    
    def _deploy_components(self, release: Release) -> None:
        """Deploy components in order respecting dependencies."""
        # Sort components by deployment order
        components_by_order = sorted(
            release.components.items(),
            key=lambda x: x[1].deployment_order
        )
        
        deployed = set()
        
        for comp_name, component in components_by_order:
            # Check dependencies
            can_deploy = all(dep in deployed for dep in component.dependencies)
            
            if can_deploy:
                component.status = ComponentStatus.DEPLOYING
                
                # Simulate deployment (90% success rate)
                import random
                if random.random()  Dict[str, Any]:
        """
        Rollback a release.
        
        Args:
            release_id: Release identifier
            
        Returns:
            Status of rollback
        """
        if release_id not in self.releases:
            return {
                "success": False,
                "message": f"Release {release_id} not found"
            }
        
        release = self.releases[release_id]
        
        # Check if can rollback
        if not release.checkpoints:
            return {
                "success": False,
                "message": "No checkpoints available for rollback"
            }
        
        last_checkpoint = release.checkpoints[-1]
        if not last_checkpoint.can_rollback:
            return {
                "success": False,
                "message": f"Cannot rollback from {last_checkpoint.stage.value} stage"
            }
        
        # Rollback deployed components
        rollback_count = 0
        for component in release.components.values():
            if component.status == ComponentStatus.DEPLOYED:
                component.status = ComponentStatus.ROLLED_BACK
                rollback_count += 1
        
        release.stage = ReleaseStage.ROLLED_BACK
        release.completed_at = datetime.now()
        
        if self.active_release == release_id:
            self.active_release = None
        
        self.statistics["rolled_back_releases"] += 1
        
        # Add checkpoint
        checkpoint = ReleaseCheckpoint(
            stage=ReleaseStage.ROLLED_BACK,
            timestamp=datetime.now(),
            status="rolled_back",
            details=f"Release rolled back, {rollback_count} components reverted",
            can_rollback=False
        )
        release.checkpoints.append(checkpoint)
        
        return {
            "success": True,
            "release_id": release_id,
            "components_rolled_back": rollback_count,
            "message": f"Release {release_id} rolled back successfully"
        }
    
    def get_release_status(self, release_id: str) -> Dict[str, Any]:
        """Get status of a release."""
        if release_id not in self.releases:
            return {
                "success": False,
                "message": f"Release {release_id} not found"
            }
        
        release = self.releases[release_id]
        
        # Component status summary
        component_summary = {
            "total": len(release.components),
            "pending": sum(1 for c in release.components.values() if c.status == ComponentStatus.PENDING),
            "deploying": sum(1 for c in release.components.values() if c.status == ComponentStatus.DEPLOYING),
            "deployed": sum(1 for c in release.components.values() if c.status == ComponentStatus.DEPLOYED),
            "failed": sum(1 for c in release.components.values() if c.status == ComponentStatus.FAILED),
        }
        
        components_list = []
        for name, comp in sorted(release.components.items(), key=lambda x: x[1].deployment_order):
            components_list.append({
                "name": name,
                "version": comp.version,
                "status": comp.status.value,
                "order": comp.deployment_order,
                "deployed_at": comp.deployed_at.isoformat() if comp.deployed_at else None,
                "error": comp.error_message
            })
        
        return {
            "success": True,
            "release_id": release_id,
            "version": release.version,
            "type": release.release_type.value,
            "stage": release.stage.value,
            "is_active": self.active_release == release_id,
            "created_at": release.created_at.isoformat(),
            "started_at": release.started_at.isoformat() if release.started_at else None,
            "completed_at": release.completed_at.isoformat() if release.completed_at else None,
            "components": components_list,
            "component_summary": component_summary,
            "checkpoints": len(release.checkpoints)
        }
    
    def list_releases(self) -> Dict[str, Any]:
        """List all releases."""
        releases_list = []
        for release_id, release in self.releases.items():
            releases_list.append({
                "release_id": release_id,
                "version": release.version,
                "type": release.release_type.value,
                "stage": release.stage.value,
                "components": len(release.components),
                "is_active": self.active_release == release_id
            })
        
        return {
            "total": len(releases_list),
            "active_release": self.active_release,
            "releases": releases_list
        }
    
    def get_statistics(self) -> Dict[str, Any]:
        """Get release management statistics."""
        return {
            "total_releases": self.statistics["total_releases"],
            "successful_releases": self.statistics["successful_releases"],
            "failed_releases": self.statistics["failed_releases"],
            "rolled_back_releases": self.statistics["rolled_back_releases"],
            "total_components_deployed": self.statistics["total_components_deployed"],
            "active_release": self.active_release
        }


class ReleaseManagementPattern:
    """
    Coordinator for release management.
    
    Manages release lifecycle with multi-component coordination.
    """
    
    def __init__(self):
        self.management = ReleaseManagement()
    
    def create_release(self, release_id: str, version: str, release_type: ReleaseType, components: List[Dict[str, Any]]) -> Dict[str, Any]:
        """Create a new release."""
        return self.management.create_release(release_id, version, release_type, components)
    
    def start_release(self, release_id: str) -> Dict[str, Any]:
        """Start a release."""
        return self.management.start_release(release_id)
    
    def advance_stage(self, release_id: str) -> Dict[str, Any]:
        """Advance release stage."""
        return self.management.advance_stage(release_id)
    
    def rollback_release(self, release_id: str) -> Dict[str, Any]:
        """Rollback a release."""
        return self.management.rollback_release(release_id)
    
    def get_release_status(self, release_id: str) -> Dict[str, Any]:
        """Get release status."""
        return self.management.get_release_status(release_id)
    
    def list_releases(self) -> Dict[str, Any]:
        """List releases."""
        return self.management.list_releases()
    
    def get_statistics(self) -> Dict[str, Any]:
        """Get statistics."""
        return self.management.get_statistics()


# Example usage
if __name__ == "__main__":
    print("=== Release Management Demo ===\n")
    
    # Create release management
    pattern = ReleaseManagementPattern()
    
    print("1. Creating release...")
    components = [
        {"name": "database", "version": "2.0.0", "order": 1, "dependencies": []},
        {"name": "backend", "version": "2.0.0", "order": 2, "dependencies": ["database"]},
        {"name": "frontend", "version": "2.0.0", "order": 3, "dependencies": ["backend"]},
        {"name": "api-gateway", "version": "2.0.0", "order": 4, "dependencies": ["backend"]}
    ]
    
    result = pattern.create_release(
        "release-2.0.0",
        "2.0.0",
        ReleaseType.MAJOR,
        components
    )
    print(f"  {result['message']}")
    print(f"  Components: {result['components']}")
    
    # Start release
    print("\n2. Starting release...")
    result = pattern.start_release("release-2.0.0")
    print(f"  {result['message']}")
    print(f"  Current stage: {result['stage']}")
    
    # Advance through stages
    print("\n3. Advancing through stages...")
    stages = ["staging", "deployment", "verification", "completed"]
    for stage in stages:
        result = pattern.advance_stage("release-2.0.0")
        if result['success']:
            print(f"  ✓ Advanced to {result['current_stage']}")
        else:
            print(f"  ✗ Failed: {result['message']}")
            break
    
    # Get release status
    print("\n4. Release status:")
    status = pattern.get_release_status("release-2.0.0")
    if status['success']:
        print(f"  Release: {status['release_id']}")
        print(f"  Version: {status['version']}")
        print(f"  Stage: {status['stage']}")
        print(f"  Components deployed: {status['component_summary']['deployed']}/{status['component_summary']['total']}")
        print(f"\n  Components:")
        for comp in status['components']:
            print(f"    - {comp['name']} v{comp['version']}: {comp['status']}")
    
    # Statistics
    print("\n5. Release statistics:")
    stats = pattern.get_statistics()
    print(f"  Total releases: {stats['total_releases']}")
    print(f"  Successful: {stats['successful_releases']}")
    print(f"  Failed: {stats['failed_releases']}")
    print(f"  Rolled back: {stats['rolled_back_releases']}")
    print(f"  Total components deployed: {stats['total_components_deployed']}")
    
    print("\n✓ Comprehensive release management with coordination complete!")

    

Agentic Architecture Pattern: Release Management

Pattern 277: 277 Release Management – Line-by-Line Explanation

Overview

Pattern 277: Release Management

Purpose: Release coordination, orchestration, and automated rollback

Code Structure Analysis

File Information

• Pattern Number: 277
• Pattern Name: 277 Release Management
• File Path: patterns\deployment\277_release_management.py
• Total Lines: 579

Detailed Code Explanation

Module Docstring

"""
Pattern 277: Release Management

Purpose: Release coordination, orchestration, and automated rollback
"""

Explanation: This module docstring describes the purpose and key features of the 277 Release Management pattern.

Imports Section

from typing import Dict, Any, List, Optional, Set
from dataclasses import dataclass, field
from datetime import datetime
from enum import Enum
from collections import defaultdict
                import random  # First 20 imports shown

Explanation: The module imports necessary dependencies: – from typing import Dict, Any, List, Optional, Set: Type hints for better code documentation – from dataclasses import dataclass, field: Data class decorators for clean data structures – from datetime import datetime: Date and time utilities – from enum import Enum: Enumeration support for fixed sets of values

Enumerations

ReleaseStage (Line 14)

class ReleaseStage(Enum):
    PLANNING
    TESTING
    STAGING
    DEPLOYMENT
    VERIFICATION
    COMPLETED
    ROLLED_BACK
    FAILED

Purpose: Stage of release lifecycle.

Values: – PLANNING: Represents planning – TESTING: Represents testing – STAGING: Represents staging – DEPLOYMENT: Represents deployment – VERIFICATION: Represents verification – COMPLETED: Successfully finished – ROLLED_BACK: Represents rolled back – FAILED: Execution failed

ReleaseType (Line 26)

class ReleaseType(Enum):
    MAJOR
    MINOR
    PATCH
    HOTFIX
    EMERGENCY

Purpose: Type of release.

Values: – MAJOR: Represents major – MINOR: Represents minor – PATCH: Represents patch – HOTFIX: Represents hotfix – EMERGENCY: Represents emergency

ComponentStatus (Line 35)

class ComponentStatus(Enum):
    PENDING
    DEPLOYING
    DEPLOYED
    FAILED
    ROLLED_BACK

Purpose: Status of release component.

Values: – PENDING: Initial state, not yet processed – DEPLOYING: Represents deploying – DEPLOYED: Represents deployed – FAILED: Execution failed – ROLLED_BACK: Represents rolled back

Classes

ReleaseStage (Line 14)

Description: Stage of release lifecycle.

ReleaseType (Line 26)

Description: Type of release.

ComponentStatus (Line 35)

Description: Status of release component.

ReleaseComponent (Line 45)

Description: Component in a release.

ReleaseCheckpoint (Line 57)

Description: Checkpoint during release.

Release (Line 67)

Description: Represents a release.

ReleaseManagement (Line 81)

Description: Implements release management pattern.

Features: – Multi-component coordination – Staged deployment process – Dependency management – Automated verification – Rollback capability – Release history tracking – Checkpoint management

Methods:

__init__ (Line 95)

def __init__(self):
    """No method docstring."""

Purpose: No method docstring.

Parameters: – self: Instance reference

create_release (Line 109)

def create_release(self, release_id, version, release_type, components, metadata):
    """Create a new release.

Args:
    release_id: Unique release identifier
    version: Release version
    release_type: Type of release
    components: List of components with name, version, order, dependencies
    metadata: Additional metadata

Returns:
    Status of release creation"""

Purpose: Create a new release.

Args: release_id: Unique release identifier version: Release version release_type: Type of release components: List of components with name, version, order, dependencies metadata: Additional metadata

Returns: Status of release creation

Parameters: – self: Instance reference – release_id: Parameter for release_id – version: Parameter for version – release_type: Parameter for release_type – components: Parameter for components – metadata: Parameter for metadata

start_release (Line 186)

def start_release(self, release_id):
    """Start a release deployment.

Args:
    release_id: Release identifier

Returns:
    Status of release start"""

Purpose: Start a release deployment.

Args: release_id: Release identifier

Returns: Status of release start

Parameters: – self: Instance reference – release_id: Parameter for release_id

advance_stage (Line 236)

def advance_stage(self, release_id):
    """Advance release to next stage.

Args:
    release_id: Release identifier

Returns:
    Status of stage advancement"""

Purpose: Advance release to next stage.

Args: release_id: Release identifier

Returns: Status of stage advancement

Parameters: – self: Instance reference – release_id: Parameter for release_id

_deploy_components (Line 300)

def _deploy_components(self, release):
    """Deploy components in order respecting dependencies."""

Purpose: Deploy components in order respecting dependencies.

Parameters: – self: Instance reference – release: Parameter for release

rollback_release (Line 337)

def rollback_release(self, release_id):
    """Rollback a release.

Args:
    release_id: Release identifier

Returns:
    Status of rollback"""

Purpose: Rollback a release.

Args: release_id: Release identifier

Returns: Status of rollback

Parameters: – self: Instance reference – release_id: Parameter for release_id

get_release_status (Line 401)

def get_release_status(self, release_id):
    """Get status of a release."""

Purpose: Get status of a release.

Parameters: – self: Instance reference – release_id: Parameter for release_id

list_releases (Line 446)

def list_releases(self):
    """List all releases."""

Purpose: List all releases.

Parameters: – self: Instance reference

get_statistics (Line 465)

def get_statistics(self):
    """Get release management statistics."""

Purpose: Get release management statistics.

Parameters: – self: Instance reference

ReleaseManagementPattern (Line 477)

Description: Coordinator for release management.

Manages release lifecycle with multi-component coordination.

Methods:

__init__ (Line 484)

def __init__(self):
    """No method docstring."""

Purpose: No method docstring.

Parameters: – self: Instance reference

create_release (Line 487)

def create_release(self, release_id, version, release_type, components):
    """Create a new release."""

Purpose: Create a new release.

Parameters: – self: Instance reference – release_id: Parameter for release_id – version: Parameter for version – release_type: Parameter for release_type – components: Parameter for components

start_release (Line 491)

def start_release(self, release_id):
    """Start a release."""

Purpose: Start a release.

Parameters: – self: Instance reference – release_id: Parameter for release_id

advance_stage (Line 495)

def advance_stage(self, release_id):
    """Advance release stage."""

Purpose: Advance release stage.

Parameters: – self: Instance reference – release_id: Parameter for release_id

rollback_release (Line 499)

def rollback_release(self, release_id):
    """Rollback a release."""

Purpose: Rollback a release.

Parameters: – self: Instance reference – release_id: Parameter for release_id

get_release_status (Line 503)

def get_release_status(self, release_id):
    """Get release status."""

Purpose: Get release status.

Parameters: – self: Instance reference – release_id: Parameter for release_id

list_releases (Line 507)

def list_releases(self):
    """List releases."""

Purpose: List releases.

Parameters: – self: Instance reference

get_statistics (Line 511)

def get_statistics(self):
    """Get statistics."""

Purpose: Get statistics.

Parameters: – self: Instance reference

Design Patterns Used

• Strategy Pattern: Different execution strategies for various scenarios
• State Pattern: Managing different states in the workflow
• Chain of Responsibility: Sequential processing through workflow nodes
• Observer Pattern: Tracking and monitoring pattern execution
• Factory Pattern: Creating instances with proper configuration

Usage Example

# Initialize the pattern
pattern = ReleaseStage(name="example", model_name="gpt-4")

# Configure and execute
result = pattern.execute(data={"key": "value"})

# Check results
print(result)

Key Concepts

• LLM Integration: Uses LangChain/OpenAI for intelligent decision-making
• Workflow Orchestration: LangGraph manages execution flow through nodes
• State Management: TypedDict defines workflow state structure
• Error Handling: Comprehensive error handling and fallback mechanisms
• Extensibility: Designed for easy customization and extension

Extension Points

This pattern can be extended by: 1. Adding custom workflow nodes 2. Implementing additional validation logic 3. Integrating with external services 4. Customizing LLM prompts and responses 5. Adding monitoring and logging capabilities