Auto-update: Tue Jul 30 10:14:37 PDT 2024
This commit is contained in:
sanj
parent
f707aa7529
commit
a1c31a7c58
2 changed files with 217 additions and 116 deletions
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@ -83,6 +83,7 @@ async def lifespan(app: FastAPI):
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app = FastAPI(lifespan=lifespan)
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app.add_middleware(
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@ -5,6 +5,7 @@ import yaml
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import math
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import os
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import re
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import uuid
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import aiofiles
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import aiohttp
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import asyncpg
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@ -315,60 +316,59 @@ class APIConfig(BaseModel):
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err(f"Error: {str(e)}")
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raise
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async def initialize_sync(self):
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for pool_entry in self.POOL:
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async with self.get_connection(pool_entry) as conn:
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tables = await conn.fetch("""
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SELECT tablename FROM pg_tables
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WHERE schemaname = 'public'
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""")
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for table in tables:
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table_name = table['tablename']
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# Add version and server_id columns if they don't exist
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await conn.execute(f"""
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DO $$
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BEGIN
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BEGIN
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ALTER TABLE "{table_name}"
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ADD COLUMN IF NOT EXISTS version INTEGER DEFAULT 1,
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ADD COLUMN IF NOT EXISTS server_id TEXT DEFAULT '{os.environ.get('TS_ID')}';
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EXCEPTION
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WHEN duplicate_column THEN
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-- Do nothing, column already exists
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END;
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END $$;
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try:
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async with self.get_connection(pool_entry) as conn:
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tables = await conn.fetch("""
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SELECT tablename FROM pg_tables
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WHERE schemaname = 'public'
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""")
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for table in tables:
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table_name = table['tablename']
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await self.ensure_sync_columns(conn, table_name)
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await self.create_sync_trigger(conn, table_name)
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# Create or replace the trigger function
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await conn.execute(f"""
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CREATE OR REPLACE FUNCTION update_version_and_server_id()
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RETURNS TRIGGER AS $$
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BEGIN
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NEW.version = COALESCE(OLD.version, 0) + 1;
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NEW.server_id = '{os.environ.get('TS_ID')}';
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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""")
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# Create the trigger if it doesn't exist
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await conn.execute(f"""
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DO $$
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BEGIN
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IF NOT EXISTS (SELECT 1 FROM pg_trigger WHERE tgname = 'update_version_and_server_id_trigger' AND tgrelid = '{table_name}'::regclass) THEN
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CREATE TRIGGER update_version_and_server_id_trigger
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BEFORE INSERT OR UPDATE ON "{table_name}"
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FOR EACH ROW EXECUTE FUNCTION update_version_and_server_id();
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END IF;
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END $$;
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""")
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info(f"Sync initialization complete for {pool_entry['ts_ip']}. All tables now have version and server_id columns with appropriate triggers.")
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info(f"Sync initialization complete for {pool_entry['ts_ip']}. All tables now have version and server_id columns with appropriate triggers.")
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except Exception as e:
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err(f"Error initializing sync for {pool_entry['ts_ip']}: {str(e)}")
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async def ensure_sync_columns(self, conn, table_name):
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await conn.execute(f"""
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DO $$
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BEGIN
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BEGIN
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ALTER TABLE "{table_name}"
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ADD COLUMN IF NOT EXISTS version INTEGER DEFAULT 1,
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ADD COLUMN IF NOT EXISTS server_id TEXT DEFAULT '{os.environ.get('TS_ID')}';
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EXCEPTION
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WHEN duplicate_column THEN
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-- Do nothing, column already exists
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END;
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END $$;
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""")
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async def create_sync_trigger(self, conn, table_name):
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await conn.execute(f"""
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CREATE OR REPLACE FUNCTION update_version_and_server_id()
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RETURNS TRIGGER AS $$
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BEGIN
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NEW.version = COALESCE(OLD.version, 0) + 1;
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NEW.server_id = '{os.environ.get('TS_ID')}';
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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DO $$
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BEGIN
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IF NOT EXISTS (SELECT 1 FROM pg_trigger WHERE tgname = 'update_version_and_server_id_trigger' AND tgrelid = '{table_name}'::regclass) THEN
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CREATE TRIGGER update_version_and_server_id_trigger
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BEFORE INSERT OR UPDATE ON "{table_name}"
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FOR EACH ROW EXECUTE FUNCTION update_version_and_server_id();
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END IF;
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END $$;
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""")
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async def get_most_recent_source(self):
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most_recent_source = None
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@ -394,27 +394,26 @@ class APIConfig(BaseModel):
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return most_recent_source
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async def pull_changes(self, source_pool_entry):
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async def pull_changes(self, source_pool_entry, batch_size=10000):
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if source_pool_entry['ts_id'] == os.environ.get('TS_ID'):
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info("Skipping self-sync")
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return 0
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total_inserts = 0
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total_updates = 0
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table_changes = {}
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total_changes = 0
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source_id = source_pool_entry['ts_id']
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source_ip = source_pool_entry['ts_ip']
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dest_id = os.environ.get('TS_ID')
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dest_ip = self.local_db['ts_ip']
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info(f"Starting comprehensive sync from source {source_id} ({source_ip}) to destination {dest_id} ({dest_ip})")
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info(f"Starting sync from source {source_id} ({source_ip}) to destination {dest_id} ({dest_ip})")
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try:
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async with self.get_connection(source_pool_entry) as source_conn:
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async with self.get_connection(self.local_db) as dest_conn:
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# Sync schema first
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schema_changes = await self.detect_schema_changes(source_conn, dest_conn)
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await self.apply_schema_changes(dest_conn, schema_changes)
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tables = await source_conn.fetch("""
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SELECT tablename FROM pg_tables
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WHERE schemaname = 'public'
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@ -424,62 +423,92 @@ class APIConfig(BaseModel):
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table_name = table['tablename']
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last_synced_version = await self.get_last_synced_version(dest_conn, table_name, source_id)
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changes = await source_conn.fetch(f"""
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SELECT * FROM "{table_name}"
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WHERE version > $1 AND server_id = $2
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ORDER BY version ASC
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""", last_synced_version, source_id)
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inserts = 0
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updates = 0
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for change in changes:
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columns = list(change.keys())
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values = [change[col] for col in columns]
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placeholders = [f'${i+1}' for i in range(len(columns))]
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while True:
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changes = await source_conn.fetch(f"""
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SELECT * FROM "{table_name}"
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WHERE version > $1 AND server_id = $2
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ORDER BY version ASC
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LIMIT $3
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""", last_synced_version, source_id, batch_size)
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insert_query = f"""
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INSERT INTO "{table_name}" ({', '.join(columns)})
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VALUES ({', '.join(placeholders)})
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ON CONFLICT (id) DO UPDATE SET
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{', '.join(f"{col} = EXCLUDED.{col}" for col in columns if col != 'id')}
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"""
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result = await dest_conn.execute(insert_query, *values)
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if 'UPDATE' in result:
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updates += 1
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else:
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inserts += 1
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if changes:
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await self.update_last_synced_version(dest_conn, table_name, source_id, changes[-1]['version'])
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total_inserts += inserts
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total_updates += updates
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table_changes[table_name] = {'inserts': inserts, 'updates': updates}
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info(f"Synced {table_name} from {source_id} to {dest_id}: {inserts} inserts, {updates} updates")
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if not changes:
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break
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info(f"Comprehensive sync complete from {source_id} ({source_ip}) to {dest_id} ({dest_ip})")
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info(f"Total changes: {total_inserts} inserts, {total_updates} updates")
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info("Changes by table:")
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for table, changes in table_changes.items():
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info(f" {table}: {changes['inserts']} inserts, {changes['updates']} updates")
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changes_count = await self.apply_batch_changes(dest_conn, table_name, changes)
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total_changes += changes_count
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last_synced_version = changes[-1]['version']
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await self.update_last_synced_version(dest_conn, table_name, source_id, last_synced_version)
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info(f"Synced batch for {table_name}: {changes_count} changes. Total so far: {total_changes}")
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info(f"Sync complete from {source_id} ({source_ip}) to {dest_id} ({dest_ip}). Total changes: {total_changes}")
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except Exception as e:
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err(f"Error during sync process: {str(e)}")
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err(f"Traceback: {traceback.format_exc()}")
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return total_inserts + total_updates
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return total_changes
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async def apply_batch_changes(self, conn, table_name, changes):
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if not changes:
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return 0
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temp_table_name = f"temp_{table_name}_{uuid.uuid4().hex[:8]}"
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try:
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# Create temporary table
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await conn.execute(f"""
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CREATE TEMPORARY TABLE {temp_table_name} (LIKE "{table_name}" INCLUDING ALL)
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ON COMMIT DROP
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""")
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# Bulk insert changes into temporary table
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columns = changes[0].keys()
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await conn.copy_records_to_table(temp_table_name, records=[tuple(change[col] for col in columns) for change in changes])
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# Perform upsert with spatial awareness
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result = await conn.execute(f"""
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INSERT INTO "{table_name}"
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SELECT tc.*
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FROM {temp_table_name} tc
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LEFT JOIN "{table_name}" t ON t.id = tc.id
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WHERE t.id IS NULL
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ON CONFLICT (id) DO UPDATE SET
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{', '.join(f"{col} = EXCLUDED.{col}" for col in columns if col != 'id')}
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WHERE (
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CASE
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WHEN "{table_name}".geometry IS NOT NULL AND EXCLUDED.geometry IS NOT NULL
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THEN NOT ST_Equals("{table_name}".geometry, EXCLUDED.geometry)
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ELSE FALSE
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END
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) OR {' OR '.join(f"COALESCE({col} <> EXCLUDED.{col}, TRUE)" for col in columns if col not in ['id', 'geometry'])}
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""")
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# Parse the result to get the number of affected rows
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affected_rows = int(result.split()[-1])
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return affected_rows
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finally:
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# Ensure temporary table is dropped
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await conn.execute(f"DROP TABLE IF EXISTS {temp_table_name}")
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async def push_changes_to_all(self):
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for pool_entry in self.POOL:
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if pool_entry['ts_id'] != os.environ.get('TS_ID'):
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await self.push_changes_to_one(pool_entry)
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try:
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await self.push_changes_to_one(pool_entry)
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except Exception as e:
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err(f"Error pushing changes to {pool_entry['ts_id']}: {str(e)}")
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async def push_changes_to_one(self, pool_entry):
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async def push_changes_to_one(self, pool_entry, batch_size=10000):
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try:
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async with self.get_connection() as local_conn:
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async with self.get_connection(pool_entry) as remote_conn:
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# Sync schema first
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schema_changes = await self.detect_schema_changes(local_conn, remote_conn)
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await self.apply_schema_changes(remote_conn, schema_changes)
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tables = await local_conn.fetch("""
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SELECT tablename FROM pg_tables
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WHERE schemaname = 'public'
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@ -489,28 +518,23 @@ class APIConfig(BaseModel):
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table_name = table['tablename']
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last_synced_version = await self.get_last_synced_version(remote_conn, table_name, os.environ.get('TS_ID'))
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changes = await local_conn.fetch(f"""
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SELECT * FROM "{table_name}"
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WHERE version > $1 AND server_id = $2
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ORDER BY version ASC
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""", last_synced_version, os.environ.get('TS_ID'))
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for change in changes:
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columns = list(change.keys())
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values = [change[col] for col in columns]
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placeholders = [f'${i+1}' for i in range(len(columns))]
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while True:
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changes = await local_conn.fetch(f"""
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SELECT * FROM "{table_name}"
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WHERE version > $1 AND server_id = $2
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ORDER BY version ASC
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LIMIT $3
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""", last_synced_version, os.environ.get('TS_ID'), batch_size)
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insert_query = f"""
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INSERT INTO "{table_name}" ({', '.join(columns)})
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VALUES ({', '.join(placeholders)})
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ON CONFLICT (id) DO UPDATE SET
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{', '.join(f"{col} = EXCLUDED.{col}" for col in columns if col != 'id')}
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"""
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if not changes:
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break
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changes_count = await self.apply_batch_changes(remote_conn, table_name, changes)
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await remote_conn.execute(insert_query, *values)
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if changes:
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await self.update_last_synced_version(remote_conn, table_name, os.environ.get('TS_ID'), changes[-1]['version'])
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last_synced_version = changes[-1]['version']
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await self.update_last_synced_version(remote_conn, table_name, os.environ.get('TS_ID'), last_synced_version)
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info(f"Pushed batch for {table_name}: {changes_count} changes to {pool_entry['ts_id']}")
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info(f"Successfully pushed changes to {pool_entry['ts_id']}")
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except Exception as e:
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@ -552,6 +576,82 @@ class APIConfig(BaseModel):
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END $$;
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""")
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async def detect_schema_changes(self, source_conn, dest_conn):
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schema_changes = {
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'new_tables': [],
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'new_columns': {}
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}
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# Detect new tables
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source_tables = await source_conn.fetch("SELECT tablename FROM pg_tables WHERE schemaname = 'public'")
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dest_tables = await dest_conn.fetch("SELECT tablename FROM pg_tables WHERE schemaname = 'public'")
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source_table_names = set(table['tablename'] for table in source_tables)
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dest_table_names = set(table['tablename'] for table in dest_tables)
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new_tables = source_table_names - dest_table_names
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schema_changes['new_tables'] = list(new_tables)
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# Detect new columns
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for table_name in source_table_names:
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if table_name in dest_table_names:
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source_columns = await source_conn.fetch(f"SELECT column_name, data_type FROM information_schema.columns WHERE table_name = '{table_name}'")
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dest_columns = await dest_conn.fetch(f"SELECT column_name, data_type FROM information_schema.columns WHERE table_name = '{table_name}'")
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source_column_names = set(column['column_name'] for column in source_columns)
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dest_column_names = set(column['column_name'] for column in dest_columns)
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new_columns = source_column_names - dest_column_names
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if new_columns:
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schema_changes['new_columns'][table_name] = [
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{'name': column['column_name'], 'type': column['data_type']}
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for column in source_columns if column['column_name'] in new_columns
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]
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return schema_changes
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async def apply_schema_changes(self, conn, schema_changes):
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for table_name in schema_changes['new_tables']:
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create_table_sql = await self.get_table_creation_sql(conn, table_name)
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await conn.execute(create_table_sql)
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info(f"Created new table: {table_name}")
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for table_name, columns in schema_changes['new_columns'].items():
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for column in columns:
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await conn.execute(f"""
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ALTER TABLE "{table_name}"
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ADD COLUMN IF NOT EXISTS {column['name']} {column['type']}
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""")
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info(f"Added new column {column['name']} to table {table_name}")
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async def get_table_creation_sql(self, conn, table_name):
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create_table_sql = await conn.fetchval(f"""
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SELECT pg_get_tabledef('{table_name}'::regclass::oid)
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""")
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return create_table_sql
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async def table_exists(self, conn, table_name):
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exists = await conn.fetchval(f"""
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SELECT EXISTS (
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SELECT FROM information_schema.tables
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WHERE table_schema = 'public'
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AND table_name = $1
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)
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""", table_name)
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return exists
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async def column_exists(self, conn, table_name, column_name):
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exists = await conn.fetchval(f"""
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SELECT EXISTS (
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SELECT FROM information_schema.columns
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WHERE table_schema = 'public'
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AND table_name = $1
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AND column_name = $2
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)
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""", table_name, column_name)
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return exists
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