Warning
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.tools.cache
import json
import logging
import os
import shutil
import sqlite3
import tempfile
import zlib
from collections import defaultdict
from threading import Lock
from typing import Dict, List, Tuple
from sqlalchemy.orm import defer
from sqlalchemy.orm.session import sessionmaker
from sqlitedict import SqliteDict
from galaxy.model.tool_shed_install import ToolShedRepository
from galaxy.tool_util.toolbox.base import ToolConfRepository
from galaxy.util import unicodify
from galaxy.util.hash_util import md5_hash_file
log = logging.getLogger(__name__)
CURRENT_TOOL_CACHE_VERSION = 0
[docs]class ToolDocumentCache:
[docs] def __init__(self, cache_dir):
self.cache_dir = cache_dir
if not os.path.exists(self.cache_dir):
os.makedirs(self.cache_dir)
self.cache_file = os.path.join(self.cache_dir, 'cache.sqlite')
self.writeable_cache_file = None
self._cache = None
self.disabled = False
self._get_cache(create_if_necessary=True)
def _get_cache(self, flag='r', create_if_necessary=False):
try:
if create_if_necessary and not os.path.exists(self.cache_file):
# Create database if necessary using 'c' flag
self._cache = SqliteDict(self.cache_file, flag='c', encode=encoder, decode=decoder, autocommit=False)
if flag == 'r':
self._cache.flag = flag
else:
cache_file = self.writeable_cache_file.name if self.writeable_cache_file else self.cache_file
self._cache = SqliteDict(cache_file, flag=flag, encode=encoder, decode=decoder, autocommit=False)
except sqlite3.OperationalError:
log.warning('Tool document cache unavailable')
self._cache = None
self.disabled = True
@property
def cache_file_is_writeable(self):
return os.access(self.cache_file, os.W_OK)
[docs] def get(self, config_file):
try:
tool_document = self._cache.get(config_file)
except sqlite3.OperationalError:
log.debug("Tool document cache unavailable")
return None
if not tool_document:
return None
if tool_document.get('tool_cache_version') != CURRENT_TOOL_CACHE_VERSION:
return None
if self.cache_file_is_writeable:
for path, modtime in tool_document['paths_and_modtimes'].items():
if os.path.getmtime(path) != modtime:
return None
return tool_document
def _make_writable(self):
if not self.writeable_cache_file:
self.writeable_cache_file = tempfile.NamedTemporaryFile(dir=self.cache_dir, suffix='cache.sqlite.tmp', delete=False)
if os.path.exists(self.cache_file):
shutil.copy(self.cache_file, self.writeable_cache_file.name)
self._get_cache(flag='c')
[docs] def persist(self):
if self.writeable_cache_file:
self._cache.commit()
os.rename(self.writeable_cache_file.name, self.cache_file)
self.reopen_ro()
[docs] def set(self, config_file, tool_source):
try:
if self.cache_file_is_writeable:
self._make_writable()
to_persist = {
'document': tool_source.to_string(),
'macro_paths': tool_source.macro_paths,
'paths_and_modtimes': tool_source.paths_and_modtimes(),
'tool_cache_version': CURRENT_TOOL_CACHE_VERSION,
}
try:
self._cache[config_file] = to_persist
except RuntimeError:
log.debug("Tool document cache not writeable")
except sqlite3.OperationalError:
log.debug("Tool document cache unavailable")
[docs] def delete(self, config_file):
if self.cache_file_is_writeable:
self._make_writable()
try:
del self._cache[config_file]
except (KeyError, RuntimeError):
pass
def __del__(self):
if self.writeable_cache_file:
try:
os.unlink(self.writeable_cache_file.name)
except Exception:
pass
[docs]class ToolCache:
"""
Cache tool definitions to allow quickly reloading the whole
toolbox.
"""
[docs] def __init__(self):
self._lock = Lock()
self._hash_by_tool_paths = {}
self._tools_by_path = {}
self._tool_paths_by_id = {}
self._macro_paths_by_id = {}
self._new_tool_ids = set()
self._removed_tool_ids = set()
self._removed_tools_by_path = {}
self._hashes_initialized = False
[docs] def assert_hashes_initialized(self):
if not self._hashes_initialized:
for tool_hash in self._hash_by_tool_paths.values():
tool_hash.hash
self._hashes_initialized = True
[docs] def cleanup(self):
"""
Remove uninstalled tools from tool cache if they are not on disk anymore or if their content has changed.
Returns list of tool_ids that have been removed.
"""
removed_tool_ids = []
try:
with self._lock:
persist_tool_document_cache = False
paths_to_cleanup = {(path, tool) for path, tool in self._tools_by_path.items() if self._should_cleanup(path)}
for config_filename, tool in paths_to_cleanup:
tool.remove_from_cache()
persist_tool_document_cache = True
del self._hash_by_tool_paths[config_filename]
if os.path.exists(config_filename):
# This tool has probably been broken while editing on disk
# We record it here, so that we can recover it
self._removed_tools_by_path[config_filename] = self._tools_by_path[config_filename]
del self._tools_by_path[config_filename]
tool_ids = tool.all_ids
for tool_id in tool_ids:
if tool_id in self._tool_paths_by_id:
del self._tool_paths_by_id[tool_id]
removed_tool_ids.extend(tool_ids)
for tool_id in removed_tool_ids:
self._removed_tool_ids.add(tool_id)
if tool_id in self._new_tool_ids:
self._new_tool_ids.remove(tool_id)
if persist_tool_document_cache:
tool.app.toolbox.persist_cache()
except Exception as e:
log.debug("Exception while checking tools to remove from cache: %s", unicodify(e))
# If by chance the file is being removed while calculating the hash or modtime
# we don't want the thread to die.
if removed_tool_ids:
log.debug(f"Removed the following tools from cache: {removed_tool_ids}")
return removed_tool_ids
def _should_cleanup(self, config_filename):
"""Return True if `config_filename` does not exist or if modtime and hash have changes, else return False."""
try:
new_mtime = os.path.getmtime(config_filename)
tool_hash = self._hash_by_tool_paths.get(config_filename)
if tool_hash.modtime < new_mtime:
if md5_hash_file(config_filename) != tool_hash.hash:
return True
tool = self._tools_by_path[config_filename]
for macro_path in tool._macro_paths:
new_mtime = os.path.getmtime(macro_path)
if self._hash_by_tool_paths.get(macro_path).modtime < new_mtime:
return True
except FileNotFoundError:
return True
return False
[docs] def get_tool(self, config_filename):
"""Get the tool at `config_filename` from the cache if the tool is up to date."""
return self._tools_by_path.get(config_filename, None)
[docs] def get_removed_tool(self, config_filename):
return self._removed_tools_by_path.get(config_filename)
[docs] def get_tool_by_id(self, tool_id):
"""Get the tool with the id `tool_id` from the cache if the tool is up to date. """
return self.get_tool(self._tool_paths_by_id.get(tool_id))
[docs] def expire_tool(self, tool_id):
with self._lock:
if tool_id in self._tool_paths_by_id:
config_filename = self._tool_paths_by_id[tool_id]
del self._hash_by_tool_paths[config_filename]
del self._tool_paths_by_id[tool_id]
del self._tools_by_path[config_filename]
if tool_id in self._new_tool_ids:
self._new_tool_ids.remove(tool_id)
[docs] def cache_tool(self, config_filename, tool):
tool_id = str(tool.id)
# We defer hashing of the config file if we haven't called assert_hashes_initialized.
# This allows startup to occur without having to read in and hash all tool and macro files
lazy_hash = not self._hashes_initialized
with self._lock:
self._hash_by_tool_paths[config_filename] = ToolHash(config_filename, lazy_hash=lazy_hash)
self._tool_paths_by_id[tool_id] = config_filename
self._tools_by_path[config_filename] = tool
self._new_tool_ids.add(tool_id)
for macro_path in tool._macro_paths:
self._hash_by_tool_paths[macro_path] = ToolHash(macro_path, lazy_hash=lazy_hash)
if tool_id not in self._macro_paths_by_id:
self._macro_paths_by_id[tool_id] = {macro_path}
else:
self._macro_paths_by_id[tool_id].add(macro_path)
[docs] def reset_status(self):
"""
Reset tracking of new and newly disabled tools.
"""
with self._lock:
self._new_tool_ids = set()
self._removed_tool_ids = set()
self._removed_tools_by_path = {}
[docs]class ToolHash:
[docs] def __init__(self, path, modtime=None, lazy_hash=False):
self.path = path
self.modtime = modtime or os.path.getmtime(path)
self._tool_hash = None
if not lazy_hash:
self.hash
@property
def hash(self):
if self._tool_hash is None:
self._tool_hash = md5_hash_file(self.path)
return self._tool_hash
[docs]class ToolShedRepositoryCache:
"""
Cache installed ToolShedRepository objects.
"""
local_repositories: List[ToolConfRepository]
repositories: List[ToolShedRepository]
repos_by_tuple: Dict[Tuple[str, str, str], List[ToolConfRepository]]
[docs] def __init__(self, session: sessionmaker):
self.session = session()
# Contains ToolConfRepository objects created from shed_tool_conf.xml entries
self.local_repositories = []
# Repositories loaded from database
self.repositories = []
self.repos_by_tuple = defaultdict(list)
self._build()
self.session.close()
[docs] def add_local_repository(self, repository):
self.local_repositories.append(repository)
self.repos_by_tuple[(repository.tool_shed, repository.owner, repository.name)].append(repository)
def _build(self):
self.repositories = self.session.query(ToolShedRepository).options(
defer(ToolShedRepository.metadata)
).all()
repos_by_tuple = defaultdict(list)
for repository in self.repositories + self.local_repositories:
repos_by_tuple[(repository.tool_shed, repository.owner, repository.name)].append(repository)
self.repos_by_tuple = repos_by_tuple
[docs] def get_installed_repository(self, tool_shed=None, name=None, owner=None, installed_changeset_revision=None, changeset_revision=None, repository_id=None):
if repository_id:
repos = [repo for repo in self.repositories if repo.id == repository_id]
if repos:
return repos[0]
else:
return None
repos = self.repos_by_tuple[(tool_shed, owner, name)]
for repo in repos:
if installed_changeset_revision and repo.installed_changeset_revision != installed_changeset_revision:
continue
if changeset_revision and repo.changeset_revision != changeset_revision:
continue
return repo
return None