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#! /usr/bin/env python
# -*- mode: python; indent-tabs-mode: nil; -*-
# vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
#
# Copyright (C) 2010,2011 Patrick Crews
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
""" server.py: generic server object used by the server
manager. This contains the generic methods for all
servers. Specific types (Drizzle, MySQL, etc) should
inherit from this guy
"""
# imports
import os
class Server(object):
""" the server class from which other servers
will inherit - contains generic methods
certain methods will be overridden by more
specific ones
"""
def __init__(self
, name
, server_manager
, code_tree
, default_storage_engine
, server_options
, requester
, workdir_root):
self.skip_keys = [ 'server_manager'
, 'system_manager'
, 'dirset'
, 'preferred_base_port'
, 'no_secure_file_priv'
, 'secure_file_string'
, 'port_block'
]
self.debug = server_manager.debug
self.verbose = server_manager.verbose
self.initial_run = 1
self.owner = requester
self.server_options = server_options
self.default_storage_engine = default_storage_engine
self.server_manager = server_manager
# We register with server_manager asap
self.server_manager.log_server(self, requester)
self.system_manager = self.server_manager.system_manager
self.code_tree = code_tree
self.valgrind = self.system_manager.valgrind
self.gdb = self.system_manager.gdb
if self.valgrind:
self.valgrind_time_buffer = 10
else:
self.valgrind_time_buffer = 1
self.cmd_prefix = self.system_manager.cmd_prefix
self.logging = self.system_manager.logging
self.no_secure_file_priv = self.server_manager.no_secure_file_priv
self.name = name
self.status = 0 # stopped, 1 = running
self.tried_start = 0
self.failed_test = 0 # was the last test a failure? our state is suspect
self.server_start_timeout = 60 * self.valgrind_time_buffer
self.pid = None
self.need_reset = False
def initialize_databases(self):
""" Call schemawriter to make db.opt files """
databases = [ 'test'
, 'mysql'
]
for database in databases:
db_path = os.path.join(self.datadir,'local',database,'db.opt')
cmd = "%s %s %s" %(self.schemawriter, database, db_path)
self.system_manager.execute_cmd(cmd)
def process_server_options(self):
"""Consume the list of options we have been passed.
Return a string with them joined
"""
return " ".join(self.server_options)
def take_db_snapshot(self):
""" Take a snapshot of our vardir for quick restores """
self.logging.info("Taking clean db snapshot...")
if os.path.exists(self.snapshot_path):
# We need to remove an existing path as python shutil
# doesn't want an existing target
self.system_manager.remove_dir(self.snapshot_path)
self.system_manager.copy_dir(self.datadir, self.snapshot_path)
def restore_snapshot(self):
""" Restore from a stored snapshot """
self.logging.verbose("Restoring from db snapshot")
if not os.path.exists(self.snapshot_path):
self.logging.error("Could not find snapshot: %s" %(self.snapshot_path))
self.system_manager.remove_dir(self.datadir)
self.system_manager.copy_dir(self.snapshot_path, self.datadir)
def is_started(self):
""" Is the server running? Particulars are server-dependent """
return "You need to implement is_started"
def get_start_cmd(self):
""" Return the command the server_manager can use to start me """
return "You need to implement get_start_cmd"
def get_stop_cmd(self):
""" Return the command the server_manager can use to stop me """
return "You need to implement get_stop_cmd"
def get_ping_cmd(self):
""" Return the command that can be used to 'ping' me
Very similar to is_started, but different
Determining if a server is still running (ping)
may differ from the method used to determine
server startup
"""
return "You need to implement get_ping_cmd"
def cleanup(self):
""" Cleanup - just free ports for now..."""
self.system_manager.port_manager.free_ports(self.port_block)
def set_server_options(self, server_options):
""" We update our server_options to the new set """
self.server_options = server_options
def reset(self):
""" Voodoo to reset ourselves """
self.failed_test = 0
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