anan character v0 and perfecly long lasting deployment

self_hosted_env/docker-compose.yml

 version: "3.8"
 services:
   postgres:
-    # Use the new custom image from Docker Hub
-    image: salmamohammedhamedmustafa/postgres:latest
+    build: ./postgres
     environment:
       POSTGRES_USER: ${POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
@@ -35,7 +34,7 @@ services:
       retries: 3
 
   voice-agent:
-    image: salmamohammedhamedmustafa/voice-agent:latest
+    build: ./voice_agent
     ports:
       - "8000:8000"
     environment:
@@ -48,6 +47,8 @@ services:
       POSTGRES_USER: "${POSTGRES_USER}"
       POSTGRES_PASSWORD: "${POSTGRES_PASSWORD}"
       POSTGRES_DB: "${POSTGRES_DB}"
+      DB_PORT: "${DB_PORT}"
+      DB_HOST: "${DB_HOST}"
     depends_on:
       - minio
       - postgres

self_hosted_env/minio/Dockerfile

+# Start from the official MinIO image
+FROM minio/minio:latest
+
+# Set the command to run MinIO with the console address
+CMD ["server", "/data", "--console-address", ":9001"]
\ No newline at end of file

self_hosted_env/minio/captain-definition

+{
+  "schemaVersion": 2,
+  "dockerfilePath": "./Dockerfile",
+  "containerHttpPort": "9001",
+  "ports": [
+    "9000:9000",
+    "9001:9001"
+  ],
+  "volumes": [
+    "/data"
+  ]
+}

self_hosted_env/postgres/captain-definition

+{
+  "schemaVersion": 2,
+  "dockerfilePath": "./Dockerfile",
+  "containerHttpPort": "5432",
+  "ports": [
+    "5432:5432"
+  ],
+  "volumes": [
+    "/var/lib/postgresql/data"
+  ]
+}

self_hosted_env/postgres/init.sql

+-- Create the main database
+DO
+$$
+BEGIN
+    IF NOT EXISTS (
+        SELECT FROM pg_database WHERE datname = 'embeddings_db'
+    ) THEN
+        PERFORM dblink_exec('dbname=' || current_database(), 'CREATE DATABASE embeddings_db');
+    END IF;
+END
+$$;
+
+-- Connect to the newly created database
+\c embeddings_db
 CREATE EXTENSION IF NOT EXISTS vector;
\ No newline at end of file

self_hosted_env/voice_agent/main.py

@@ -14,7 +14,7 @@ from repositories import StorageRepository, MinIOStorageRepository
 from handlers import AudioMessageHandler, TextMessageHandler
 from services import (
     AudioService, ChatService, HealthService, ResponseService, 
-    ResponseManager, OpenAIService, AgentService
+    ResponseManager, OpenAIService, AgentService, ConnectionPool, PGVectorService, ChatDatabaseService
 )
 
 class DIContainer:
@@ -25,8 +25,17 @@ class DIContainer:
         
         # Initialize OpenAI and Agent services
         self.openai_service = OpenAIService()
-        self.agent_service = AgentService()
-        
+
+        self.pool_handler = ConnectionPool(
+            dbname=os.getenv("POSTGRES_DB"),
+            user=os.getenv("POSTGRES_USER"),
+            password=os.getenv("POSTGRES_PASSWORD"),
+            host=os.getenv("DB_HOST"), # This is the crucial part
+            port=int(os.getenv("DB_PORT"))
+        )
+        print(os.getenv("DB_HOST"), os.getenv("POSTGRES_DB"), os.getenv("POSTGRES_USER"))
+        self.agent_service = AgentService(pool_handler=self.pool_handler)
+
         # Initialize services
         self.audio_service = AudioService(self.storage_repo, self.config.minio_bucket)
         self.chat_service = ChatService(

self_hosted_env/voice_agent/services/__init__.py

@@ -5,4 +5,7 @@ from .response_service import ResponseService
 from .response_manager import ResponseManager
 from .openai_service import OpenAIService
 from .agent_service import AgentService
-from .pgvector_service import PGVectorService
\ No newline at end of file
+from .pgvector_service import PGVectorService
+from .chat_database_service import ChatDatabaseService
+from .connection_pool import ConnectionPool
+from .pedagogy_service import PedagogyService

self_hosted_env/voice_agent/services/chat_database_service.py

 import os
 import psycopg2
 from psycopg2.extras import RealDictCursor
-from psycopg2.pool import ThreadedConnectionPool
 from typing import List, Dict, Optional, Tuple
 import logging
+from services.connection_pool import ConnectionPool
+
 
 logger = logging.getLogger(__name__)
 
 
 class ChatDatabaseService:
-    """Simple service for managing chat history in PostgreSQL with connection pooling"""
+    """Service for managing chat history using a shared, robust connection pool"""
 
-    def __init__(self):
-        self.pool = ThreadedConnectionPool(
-            minconn=1,
-            maxconn=20,
-            host=os.getenv("POSTGRES_HOST", "postgres"),
-            user=os.getenv("POSTGRES_USER"),
-            password=os.getenv("POSTGRES_PASSWORD"),
-            dbname=os.getenv("POSTGRES_DB"),
-        )
+    def __init__(self, pool_handler: 'ConnectionPoolHandler'):
+        self.pool_handler = pool_handler
 
     def get_student_nationality(self, student_id: str) -> Optional[str]:
         """Get student nationality from database"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     "SELECT nationality FROM students WHERE student_id = %s",
@@ -32,13 +25,10 @@ class ChatDatabaseService:
                 )
                 result = cur.fetchone()
                 return result["nationality"] if result else None
-        finally:
-            self.pool.putconn(conn)
 
     def get_student_info(self, student_id: str) -> Optional[Dict]:
         """Get complete student information from database"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     """
@@ -53,18 +43,15 @@ class ChatDatabaseService:
                     return {
                         'student_id': result['student_id'],
                         'student_name': result['student_name'],
-                        'grade': result['grade'],  # This is now an integer
-                        'is_arabic': result['language'],  # Convert language boolean to is_arabic
+                        'grade': result['grade'],
+                        'is_arabic': result['language'],
                         'nationality': result['nationality']
                     }
                 return None
-        finally:
-            self.pool.putconn(conn)
 
     def get_student_grade_and_language(self, student_id: str) -> Optional[Tuple[int, bool]]:
         """Get student grade and language preference"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     "SELECT grade, language FROM students WHERE student_id = %s",
@@ -74,13 +61,10 @@ class ChatDatabaseService:
                 if result:
                     return (result["grade"], result["language"])
                 return None
-        finally:
-            self.pool.putconn(conn)
 
     def get_chat_history(self, student_id: str, limit: int = 20) -> List[Dict[str, str]]:
         """Get chat history for a student, returns in chronological order"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     """
@@ -93,15 +77,11 @@ class ChatDatabaseService:
                     (student_id, limit)
                 )
                 results = cur.fetchall()
-                # Return in chronological order (oldest first)
                 return [{"role": row["role"], "content": row["content"]} for row in reversed(results)]
-        finally:
-            self.pool.putconn(conn)
 
     def add_message(self, student_id: str, role: str, content: str):
         """Add a message to chat history"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor() as cur:
                 cur.execute(
                     """
@@ -111,26 +91,20 @@ class ChatDatabaseService:
                     (student_id, role, content)
                 )
                 conn.commit()
-        finally:
-            self.pool.putconn(conn)
 
     def clear_history(self, student_id: str):
         """Clear chat history for a student"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor() as cur:
                 cur.execute(
                     "DELETE FROM chat_history WHERE student_id = %s",
                     (student_id,)
                 )
                 conn.commit()
-        finally:
-            self.pool.putconn(conn)
 
     def limit_history(self, student_id: str, max_messages: int = 40):
         """Keep only recent messages for a student"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor() as cur:
                 cur.execute(
                     """
@@ -147,8 +121,6 @@ class ChatDatabaseService:
                     (student_id, student_id, max_messages)
                 )
                 conn.commit()
-        finally:
-            self.pool.putconn(conn)
 
     def update_student_info(self, student_id: str, grade: Optional[int] = None, 
                            language: Optional[bool] = None, nationality: Optional[str] = None):
@@ -170,8 +142,7 @@ class ChatDatabaseService:
         
         if updates:
             params.append(student_id)
-            conn = self.pool.getconn()
-            try:
+            with self.pool_handler.get_connection() as conn:
                 with conn.cursor() as cur:
                     cur.execute(
                         f"""
@@ -182,14 +153,11 @@ class ChatDatabaseService:
                         params
                     )
                     conn.commit()
-            finally:
-                self.pool.putconn(conn)
 
     def create_student(self, student_id: str, student_name: str, grade: int, 
                       language: bool, nationality: str = 'EGYPTIAN'):
         """Create a new student record"""
-        conn = self.pool.getconn()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor() as cur:
                 cur.execute(
                     """
@@ -200,9 +168,3 @@ class ChatDatabaseService:
                     (student_id, student_name, grade, language, nationality)
                 )
                 conn.commit()
-        finally:
-            self.pool.putconn(conn)
-
-    def close_pool(self):
-        if self.pool:
-            self.pool.closeall()
\ No newline at end of file

self_hosted_env/voice_agent/services/connection_pool.py

+import os
+import psycopg2
+from psycopg2.pool import ThreadedConnectionPool
+import logging
+import time
+import threading
+from contextlib import contextmanager
+
+logger = logging.getLogger(__name__)
+
+
+class ConnectionPool:
+    """connection pool with health monitoring and automatic recovery"""
+    
+    def __init__(self, minconn=2, maxconn=20, **db_params):
+        self.db_params = db_params
+        self.minconn = minconn
+        self.maxconn = maxconn
+        self.pool = None
+        self._pool_lock = threading.RLock()
+        self._last_health_check = 0
+        self._health_check_interval = 300  # 5 minutes
+        self._connection_timeout = 30
+        self._idle_timeout = 7200  # 2 hours
+        
+        self._initialize_pool()
+        
+    def _initialize_pool(self):
+        """Initialize the connection pool with proper parameters"""
+        try:
+            # Add connection parameters to handle idle connections
+            pool_params = {
+                **self.db_params,
+                'connect_timeout': self._connection_timeout,
+                # These parameters help with connection management
+                'keepalives_idle': 600,      # Start keepalives after 10 min idle
+                'keepalives_interval': 30,   # Send keepalive every 30 seconds  
+                'keepalives_count': 3,       # Close connection after 3 failed keepalives
+            }
+            
+            self.pool = ThreadedConnectionPool(
+                minconn=self.minconn,
+                maxconn=self.maxconn,
+                **pool_params
+            )
+            logger.info(f"Connection pool initialized with {self.minconn}-{self.maxconn} connections")
+            
+        except Exception as e:
+            logger.error(f"Failed to initialize connection pool: {e}")
+            raise
+    
+    def _recreate_pool(self):
+        """Recreate the connection pool in case of catastrophic failure"""
+        with self._pool_lock:
+            if self.pool:
+                try:
+                    self.pool.closeall()
+                except:
+                    pass
+            
+            logger.warning("Recreating connection pool...")
+            self._initialize_pool()
+    
+    def _validate_connection(self, conn):
+        """Validate a connection with comprehensive checks"""
+        try:
+            # Check if connection is alive
+            with conn.cursor() as cur:
+                cur.execute("SELECT 1")
+                cur.fetchone()
+                
+            # Check connection status
+            if conn.closed != 0:
+                return False
+                
+            # Check for any pending transactions
+            if conn.info.transaction_status != psycopg2.extensions.TRANSACTION_STATUS_IDLE:
+                try:
+                    conn.rollback()
+                except:
+                    return False
+                    
+            return True
+            
+        except (psycopg2.OperationalError, psycopg2.InterfaceError, 
+                psycopg2.DatabaseError) as e:
+            logger.debug(f"Connection validation failed: {e}")
+            return False
+        except Exception as e:
+            logger.warning(f"Unexpected error during connection validation: {e}")
+            return False
+    
+    def _health_check(self):
+        """Perform periodic health check on the pool"""
+        current_time = time.time()
+        if current_time - self._last_health_check < self._health_check_interval:
+            return
+            
+        try:
+            with self._pool_lock:
+                if self.pool:
+                    # Try to get a connection to test pool health
+                    test_conn = self.pool.getconn()
+                    if test_conn and self._validate_connection(test_conn):
+                        self.pool.putconn(test_conn)
+                        self._last_health_check = current_time
+                        return
+                    else:
+                        # Connection is bad, try to close it
+                        if test_conn:
+                            try:
+                                test_conn.close()
+                            except:
+                                pass
+                
+                # Pool seems unhealthy, recreate it
+                logger.warning("Pool health check failed, recreating pool")
+                self._recreate_pool()
+                self._last_health_check = current_time
+                
+        except Exception as e:
+            logger.error(f"Health check failed: {e}")
+            try:
+                self._recreate_pool()
+            except Exception as recreate_error:
+                logger.error(f"Failed to recreate pool during health check: {recreate_error}")
+    
+    @contextmanager
+    def get_connection(self, max_retries=3):
+        """Get a validated connection with automatic retry and recovery"""
+        self._health_check()
+        
+        conn = None
+        for attempt in range(max_retries):
+            try:
+                with self._pool_lock:
+                    if not self.pool:
+                        self._initialize_pool()
+                    conn = self.pool.getconn()
+                
+                if conn and self._validate_connection(conn):
+                    try:
+                        yield conn
+                        return
+                    finally:
+                        if conn:
+                            try:
+                                # Ensure connection is in a clean state
+                                if conn.info.transaction_status != psycopg2.extensions.TRANSACTION_STATUS_IDLE:
+                                    conn.rollback()
+                                self.pool.putconn(conn)
+                            except Exception as e:
+                                logger.warning(f"Error returning connection to pool: {e}")
+                                try:
+                                    conn.close()
+                                except:
+                                    pass
+                else:
+                    # Bad connection, close it
+                    if conn:
+                        try:
+                            conn.close()
+                        except:
+                            pass
+                    conn = None
+                    
+            except Exception as e:
+                logger.warning(f"Connection attempt {attempt + 1} failed: {e}")
+                if conn:
+                    try:
+                        conn.close()
+                    except:
+                        pass
+                    conn = None
+                
+                if attempt == max_retries - 1:
+                    # Last attempt, try to recreate pool
+                    try:
+                        self._recreate_pool()
+                    except Exception as recreate_error:
+                        logger.error(f"Failed to recreate pool: {recreate_error}")
+                    raise ConnectionError(f"Failed to get valid connection after {max_retries} attempts")
+                
+                # Wait before retry with exponential backoff
+                time.sleep(min(2 ** attempt, 10))
+    
+    def get_valid_conn(self):
+        """Legacy method for backward compatibility - get a validated connection"""
+        max_retries = 3
+        for attempt in range(max_retries):
+            try:
+                with self._pool_lock:
+                    if not self.pool:
+                        self._initialize_pool()
+                    conn = self.pool.getconn()
+                
+                if conn and self._validate_connection(conn):
+                    return conn
+                else:
+                    # Bad connection, close it
+                    if conn:
+                        try:
+                            conn.close()
+                        except:
+                            pass
+                    conn = None
+                    
+            except Exception as e:
+                logger.warning(f"Connection attempt {attempt + 1} failed: {e}")
+                if conn:
+                    try:
+                        conn.close()
+                    except:
+                        pass
+                    conn = None
+                
+                if attempt == max_retries - 1:
+                    # Last attempt, try to recreate pool
+                    try:
+                        self._recreate_pool()
+                    except Exception as recreate_error:
+                        logger.error(f"Failed to recreate pool: {recreate_error}")
+                    raise ConnectionError(f"Failed to get valid connection after {max_retries} attempts")
+                
+                # Wait before retry with exponential backoff
+                time.sleep(min(2 ** attempt, 10))
+    
+    def put_conn(self, conn):
+        """Return connection to pool - legacy method for backward compatibility"""
+        try:
+            if conn:
+                # Ensure connection is in a clean state
+                if conn.info.transaction_status != psycopg2.extensions.TRANSACTION_STATUS_IDLE:
+                    conn.rollback()
+                self.pool.putconn(conn)
+        except Exception as e:
+            logger.warning(f"Error returning connection to pool: {e}")
+            try:
+                conn.close()
+            except:
+                pass
+    
+    def close_all(self):
+        """Close all connections in the pool"""
+        with self._pool_lock:
+            if self.pool:
+                try:
+                    self.pool.closeall()
+                finally:
+                    self.pool = None
\ No newline at end of file

self_hosted_env/voice_agent/services/pgvector_service.py

 import os
 import psycopg2
 from psycopg2.extras import RealDictCursor
-from psycopg2.pool import ThreadedConnectionPool
 from typing import List, Optional
-# Import the pgvector adapter
+import logging
 from pgvector.psycopg2 import register_vector
+from services.connection_pool import ConnectionPool
+
+logger = logging.getLogger(__name__)
 
 
 class PGVectorService:
-    """Service for managing embeddings with PostgreSQL pgvector using connection pooling"""
+    """Service for managing embeddings with PostgreSQL pgvector using a shared, robust connection pool"""
 
-    def __init__(self):
-        self.pool = ThreadedConnectionPool(
-            minconn=1,
-            maxconn=20,
-            host=os.getenv("POSTGRES_HOST", "postgres"),
-            user=os.getenv("POSTGRES_USER"),
-            password=os.getenv("POSTGRES_PASSWORD"),
-            dbname=os.getenv("POSTGRES_DB"),
-        )
-        # Test connection and register vector type to ensure the pool works
-        conn = self.pool.getconn()
-        try:
+    def __init__(self, pool_handler: 'ConnectionPool'):
+        self.pool_handler = pool_handler
+        # Test connection and register vector type
+        with self.pool_handler.get_connection() as conn:
             register_vector(conn)
-        finally:
-            self.pool.putconn(conn)
-
-    def _get_conn_with_vector(self):
-        """Get a connection from the pool and register vector type"""
-        conn = self.pool.getconn()
-        register_vector(conn)
-        return conn
 
     def insert_embedding(self, id: int, embedding: list):
         """Insert or update an embedding"""
-        conn = self._get_conn_with_vector()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor() as cur:
                 cur.execute(
                     """
@@ -46,13 +31,10 @@ class PGVectorService:
                     (id, embedding),
                 )
                 conn.commit()
-        finally:
-            self.pool.putconn(conn)
 
     def search_nearest(self, query_embedding: list, limit: int = 3):
         """Search nearest embeddings using cosine distance (<-> operator)"""
-        conn = self._get_conn_with_vector()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     """
@@ -64,8 +46,6 @@ class PGVectorService:
                     (query_embedding, query_embedding, limit),
                 )
                 return cur.fetchall()
-        finally:
-            self.pool.putconn(conn)
 
     def search_filtered_nearest(
         self, 
@@ -76,8 +56,7 @@ class PGVectorService:
         limit: int = 3
     ):
         """Search nearest embeddings with filtering by grade, subject, and language"""
-        conn = self._get_conn_with_vector()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     """
@@ -93,8 +72,6 @@ class PGVectorService:
                     (query_embedding, grade, f"%{subject}%", is_arabic, query_embedding, limit),
                 )
                 return cur.fetchall()
-        finally:
-            self.pool.putconn(conn)
 
     def search_flexible_filtered_nearest(
         self, 
@@ -128,8 +105,7 @@ class PGVectorService:
         params.append(query_embedding)
         params.append(limit)
         
-        conn = self._get_conn_with_vector()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     f"""
@@ -143,13 +119,10 @@ class PGVectorService:
                     params
                 )
                 return cur.fetchall()
-        finally:
-            self.pool.putconn(conn)
 
     def get_subjects_by_grade_and_language(self, grade: int, is_arabic: bool) -> List[str]:
         """Get available subjects for a specific grade and language"""
-        conn = self._get_conn_with_vector()
-        try:
+        with self.pool_handler.get_connection() as conn:
             with conn.cursor(cursor_factory=RealDictCursor) as cur:
                 cur.execute(
                     """
@@ -161,9 +134,3 @@ class PGVectorService:
                     (grade, is_arabic)
                 )
                 return [row['subject'] for row in cur.fetchall()]
-        finally:
-            self.pool.putconn(conn)
-
-    def close_pool(self):
-        if self.pool:
-            self.pool.closeall()
\ No newline at end of file