| 1 | from sqlalchemy import * |
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| 2 | |
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| 3 | from sqlalchemy.ext.sessioncontext import SessionContext |
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| 4 | from sqlalchemy.ext.assignmapper import assign_mapper |
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| 5 | |
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| 6 | __all__ = ['meta', |
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| 7 | 'ctx', |
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| 8 | 'clear_cache', |
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| 9 | 'machine_table', |
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| 10 | 'machine_access_table', |
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| 11 | 'nic_table', |
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| 12 | 'disk_table', |
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| 13 | 'types_table', |
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| 14 | 'cdroms_table', |
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| 15 | 'Machine', |
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| 16 | 'MachineAccess', |
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| 17 | 'NIC', |
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| 18 | 'Disk', |
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| 19 | 'Type', |
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| 20 | 'CDROM'] |
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| 21 | |
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| 22 | meta = DynamicMetaData() |
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| 23 | ctx = SessionContext(create_session) |
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| 24 | |
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| 25 | machine_table = Table('machines', meta, |
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| 26 | Column('machine_id', Integer, primary_key=True, nullable=False), |
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| 27 | Column('name', String, nullable=False), |
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| 28 | Column('memory', Integer, nullable=False), |
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| 29 | Column('owner', String, nullable=False), |
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| 30 | Column('contact', String, nullable=False), |
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| 31 | Column('uuid', String, nullable=False), |
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| 32 | Column('administrator', String, nullable=False, default=False), |
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| 33 | Column('type_id', String, ForeignKey('types.type_id'), nullable=False), |
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| 34 | Column('autorestart', Boolean, nullable=False, default=False), |
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| 35 | Column('cpus', Integer, nullable=False, default=1)) |
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| 36 | |
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| 37 | nic_table = Table('nics', meta, |
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| 38 | Column('machine_id', Integer, ForeignKey('machines.machine_id'), nullable=True), |
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| 39 | Column('mac_addr', String, nullable=False, primary_key=True), |
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| 40 | Column('ip', String, nullable=False, unique=True), |
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| 41 | Column('hostname', String, nullable=True)) |
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| 42 | |
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| 43 | disk_table = Table('disks', meta, |
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| 44 | Column('machine_id', Integer, ForeignKey('machines.machine_id'), nullable=False), |
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| 45 | Column('guest_device_name', String, nullable=False), |
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| 46 | Column('size', Integer, nullable=False), |
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| 47 | PrimaryKeyConstraint('machine_id', 'guest_device_name')) |
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| 48 | |
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| 49 | types_table = Table('types', meta, |
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| 50 | Column('type_id', String, primary_key=True, nullable=False), |
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| 51 | Column('description', String, nullable=False), |
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| 52 | Column('hvm', Boolean, nullable=False), |
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| 53 | Column('apic', Boolean, nullable=False), |
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| 54 | Column('acpi', Boolean, nullable=False), |
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| 55 | Column('pae', Boolean, nullable=False)) |
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| 56 | |
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| 57 | cdroms_table = Table('cdroms', meta, |
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| 58 | Column('cdrom_id', String, primary_key=True, nullable=False), |
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| 59 | Column('description', String, nullable=False)) |
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| 60 | |
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| 61 | machine_access_table = Table('machine_access', meta, |
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| 62 | Column('machine_id', Integer, ForeignKey('machines.machine_id'), nullable=False, index=True), |
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| 63 | Column('user', String, nullable=False, index=True), |
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| 64 | PrimaryKeyConstraint('machine_id', 'user')) |
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| 65 | |
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| 66 | class Machine(object): |
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| 67 | def __repr__(self): |
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| 68 | return "<Machine %s: name='%s' owner='%s'>" % (self.machine_id, self.name, self.owner) |
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| 69 | |
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| 70 | class MachineAccess(object): |
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| 71 | def __repr__(self): |
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| 72 | return "<MachineAccess machine='%s' user='%s'>" % (self.machine, self.user) |
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| 73 | |
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| 74 | class NIC(object): |
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| 75 | def __repr__(self): |
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| 76 | return "<NIC: mac='%s' machine='%s' ip='%s' hostname='%s'>" % (self.mac_addr, self.machine_id, self.ip, self.hostname) |
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| 77 | |
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| 78 | class Disk(object): |
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| 79 | def __repr__(self): |
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| 80 | return "<Disk: machine=%s device=%s size=%s>" % (self.machine_id, self.guest_device_name, self.size) |
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| 81 | |
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| 82 | class Type(object): |
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| 83 | def __repr__(self): |
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| 84 | return "<Type %s: %s>" % (self.type_id, self.description) |
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| 85 | |
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| 86 | class CDROM(object): |
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| 87 | def __repr__(self): |
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| 88 | return "<CDROM %s: %s>" % (self.cdrom_id, self.description) |
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| 89 | |
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| 90 | assign_mapper(ctx, Machine, machine_table, |
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| 91 | properties={'nics': relation(NIC, backref="machine"), |
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| 92 | 'disks': relation(Disk, backref="machine"), |
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| 93 | 'type': relation(Type), |
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| 94 | 'acl': relation(MachineAccess, backref="machine")}); |
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| 95 | assign_mapper(ctx, MachineAccess, machine_access_table) |
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| 96 | assign_mapper(ctx, NIC, nic_table) |
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| 97 | assign_mapper(ctx, Disk, disk_table) |
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| 98 | assign_mapper(ctx, Type, types_table) |
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| 99 | assign_mapper(ctx, CDROM, cdroms_table) |
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| 100 | |
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| 101 | def clear_cache(): |
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| 102 | """Clear sqlalchemy's cache. |
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| 103 | |
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| 104 | This _seems_ to be the way; it works, but the docs don't mention |
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| 105 | it. Why is this so obscure?""" |
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| 106 | |
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| 107 | ctx.registry.clear() |
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