This document is for an old release of Galaxy. You can alternatively view this page in the latest release if it exists or view the top of the latest release's documentation.

Source code for galaxy.model.orm.engine_factory

import logging
import threading
import time

from sqlalchemy import create_engine, event
from sqlalchemy.engine import Engine

log = logging.getLogger(__name__)

QUERY_COUNT_LOCAL = threading.local()

[docs]def reset_request_query_counts(): QUERY_COUNT_LOCAL.times = []
[docs]def log_request_query_counts(req_id): try: times = QUERY_COUNT_LOCAL.times if times: log.info("Executed [%s] SQL requests in for web request [%s] (%f(s)ms)" % (len(times), req_id, sum(times) * 1000.)) except AttributeError: # Didn't record anything so don't worry. pass
[docs]def build_engine(url, engine_options, database_query_profiling_proxy=False, trace_logger=None, slow_query_log_threshold=0, thread_local_log=None, log_query_counts=False): # Should we use the logging proxy? if database_query_profiling_proxy: import galaxy.model.orm.logging_connection_proxy as logging_connection_proxy proxy = logging_connection_proxy.LoggingProxy() # If metlog is enabled, do micrologging elif trace_logger: import galaxy.model.orm.logging_connection_proxy as logging_connection_proxy proxy = logging_connection_proxy.TraceLoggerProxy(trace_logger) else: proxy = None if slow_query_log_threshold or thread_local_log or log_query_counts: @event.listens_for(Engine, "before_execute") def before_execute(conn, clauseelement, multiparams, params): conn.info.setdefault('query_start_time', []).append(time.time()) @event.listens_for(Engine, "after_cursor_execute") def after_cursor_execute(conn, cursor, statement, parameters, context, executemany): total = time.time() - conn.info['query_start_time'].pop(-1) if total > slow_query_log_threshold: log.debug("Slow query: %f(s)\n%s\nParameters: %s" % (total, statement, parameters)) if log_query_counts: try: QUERY_COUNT_LOCAL.times.append(total) except AttributeError: # Not a web thread. pass if thread_local_log is not None: try: if thread_local_log.log: log.debug("Request query: %f(s)\n%s\nParameters: %s" % (total, statement, parameters)) except AttributeError: pass # Create the database engine engine = create_engine(url, proxy=proxy, **engine_options) return engine