Beispiel #1
0
    def test_add_known_peer(self):
        key_id = EllipticalKeysAuth(self.path, "TESTPRIV", "TESTPUB").get_key_id()
        nominal_seeds = len(self.service.seeds)

        node = Node(
            'super_node', key_id,
            pub_addr='1.2.3.4',
            prv_addr='1.2.3.4',
            pub_port=10000,
            prv_port=10000
        )
        node.prv_addresses = [node.prv_addr, '172.1.2.3']

        assert Node.is_super_node(node)

        KnownHosts.delete().execute()
        len_start = len(KnownHosts.select())

        # insert one
        self.service.add_known_peer(node, node.pub_addr, node.pub_port)
        select_1 = KnownHosts.select()
        len_1 = len(select_1)
        last_conn_1 = select_1[0].last_connected
        assert len_1 > len_start

        # advance time
        time.sleep(0.1)

        # insert duplicate
        self.service.add_known_peer(node, node.pub_addr, node.pub_port)
        select_2 = KnownHosts.select()
        len_2 = len(select_2)
        assert len_2 == len_1
        assert select_2[0].last_connected > last_conn_1

        assert len(self.service.seeds) > nominal_seeds

        # try to add more than max, we already have at least 1
        pub_prefix = '2.2.3.'
        prv_prefix = '172.1.2.'
        for i in xrange(1, MAX_STORED_HOSTS + 6):
            i_str = str(i)
            pub = pub_prefix + i_str
            prv = prv_prefix + i_str
            n = Node(
                i_str, key_id + i_str,
                pub_addr=pub,
                prv_addr=prv,
                pub_port=10000,
                prv_port=10000
            )
            self.service.add_known_peer(n, pub, n.prv_port)

        assert len(KnownHosts.select()) == MAX_STORED_HOSTS
        assert len(self.service.seeds) == nominal_seeds
Beispiel #2
0
    def test_add_known_peer(self):
        key_id = encode_hex(urandom(64))[2:]
        nominal_seeds = len(self.service.seeds)

        node = Node(node_name='super_node',
                    key=str(key_id),
                    pub_addr='1.2.3.4',
                    prv_addr='1.2.3.4',
                    pub_port=10000,
                    prv_port=10000)
        node.prv_addresses = [node.prv_addr, '172.1.2.3']

        assert Node.is_super_node(node)

        KnownHosts.delete().execute()
        len_start = len(KnownHosts.select())

        # insert one
        self.service.add_known_peer(node, node.pub_addr, node.pub_port)
        select_1 = KnownHosts.select()
        len_1 = len(select_1)
        last_conn_1 = select_1[0].last_connected
        assert len_1 > len_start

        # advance time
        time.sleep(0.1)

        # insert duplicate
        self.service.add_known_peer(node, node.pub_addr, node.pub_port)
        select_2 = KnownHosts.select()
        len_2 = len(select_2)
        assert len_2 == len_1
        assert select_2[0].last_connected > last_conn_1

        assert len(self.service.seeds) > nominal_seeds

        # try to add more than max, we already have at least 1
        pub_prefix = '2.2.3.'
        prv_prefix = '172.1.2.'
        key_id_str = key_id
        for i in range(1, MAX_STORED_HOSTS + 6):
            i_str = str(i)
            pub = pub_prefix + i_str
            prv = prv_prefix + i_str
            n = Node(node_name=i_str,
                     key=key_id_str + i_str,
                     pub_addr=pub,
                     prv_addr=prv,
                     pub_port=10000,
                     prv_port=10000)
            self.service.add_known_peer(n, pub, n.prv_port)

        assert len(KnownHosts.select()) == MAX_STORED_HOSTS
        assert len(self.service.seeds) == nominal_seeds
Beispiel #3
0
class Client(HardwarePresetsMixin):
    def __init__(self,
                 datadir=None,
                 transaction_system=False,
                 connect_to_known_hosts=True,
                 use_docker_machine_manager=True,
                 use_monitor=True,
                 **config_overrides):

        if not datadir:
            datadir = get_local_datadir('default')

        self.datadir = datadir
        self.__lock_datadir()
        self.lock = Lock()
        self.task_tester = None

        # Read and validate configuration
        config = AppConfig.load_config(datadir)
        self.config_desc = ClientConfigDescriptor()
        self.config_desc.init_from_app_config(config)

        for key, val in config_overrides.iteritems():
            if not hasattr(self.config_desc, key):
                self.quit()  # quit only closes underlying services (for now)
                raise AttributeError(
                    "Can't override nonexistent config entry '{}'".format(key))
            setattr(self.config_desc, key, val)

        self.config_approver = ConfigApprover(self.config_desc)

        log.info('Client "%s", datadir: %s', self.config_desc.node_name,
                 datadir)

        # Initialize database
        self.db = Database(datadir)

        # Hardware configuration
        HardwarePresets.initialize(self.datadir)
        HardwarePresets.update_config(self.config_desc.hardware_preset_name,
                                      self.config_desc)

        self.keys_auth = EllipticalKeysAuth(self.datadir)

        # NETWORK
        self.node = Node(node_name=self.config_desc.node_name,
                         prv_addr=self.config_desc.node_address,
                         key=self.keys_auth.get_key_id())

        self.p2pservice = None
        self.diag_service = None

        self.task_server = None
        self.last_nss_time = time.time()
        self.last_net_check_time = time.time()
        self.last_balance_time = time.time()
        self.last_tasks_time = time.time()

        self.last_node_state_snapshot = None

        self.nodes_manager_client = None

        self.do_work_task = task.LoopingCall(self.__do_work)
        self.publish_task = task.LoopingCall(self.__publish_events)

        self.cfg = config
        self.send_snapshot = False
        self.snapshot_lock = Lock()

        self.ranking = Ranking(self)

        if transaction_system:
            # Bootstrap transaction system if enabled.
            # TODO: Transaction system (and possible other modules) should be
            #       modeled as a Service that run independently.
            #       The Client/Application should be a collection of services.
            self.transaction_system = EthereumTransactionSystem(
                datadir, self.keys_auth._private_key)
        else:
            self.transaction_system = None

        self.use_docker_machine_manager = use_docker_machine_manager
        self.connect_to_known_hosts = connect_to_known_hosts
        self.environments_manager = EnvironmentsManager()
        self.daemon_manager = None

        self.rpc_publisher = None

        self.ipfs_manager = None
        self.resource_server = None
        self.resource_port = 0
        self.last_get_resource_peers_time = time.time()
        self.get_resource_peers_interval = 5.0
        self.use_monitor = use_monitor
        self.monitor = None
        self.session_id = uuid.uuid4().get_hex()
        dispatcher.connect(self.p2p_listener, signal='golem.p2p')
        dispatcher.connect(self.taskmanager_listener,
                           signal='golem.taskmanager')

        atexit.register(self.quit)

    def configure_rpc(self, rpc_session):
        self.rpc_publisher = Publisher(rpc_session)

    def p2p_listener(self, sender, signal, event='default', **kwargs):
        if event != 'unreachable':
            return
        self.node.port_status = kwargs.get('description', u'')

    def taskmanager_listener(self, sender, signal, event='default', **kwargs):
        if event != 'task_status_updated':
            return
        self._publish(Task.evt_task_status, kwargs['task_id'])

    # TODO: re-enable
    def sync(self):
        pass

    def start(self):
        if self.use_monitor:
            self.init_monitor()
        try:
            self.start_network()
        except SystemExit:
            raise
        except Exception:
            log.critical('Can\'t start network. Giving up.', exc_info=True)
            sys.exit(1)

        self.do_work_task.start(1, False)
        self.publish_task.start(1, True)

    def start_network(self):
        log.info("Starting network ...")
        self.node.collect_network_info(self.config_desc.seed_host,
                                       use_ipv6=self.config_desc.use_ipv6)
        log.debug("Is super node? %s", self.node.is_super_node())

        # self.ipfs_manager = IPFSDaemonManager(
        #    connect_to_bootstrap_nodes=self.connect_to_known_hosts)
        # self.ipfs_manager.store_client_info()

        self.p2pservice = P2PService(
            self.node,
            self.config_desc,
            self.keys_auth,
            connect_to_known_hosts=self.connect_to_known_hosts)
        self.task_server = TaskServer(
            self.node,
            self.config_desc,
            self.keys_auth,
            self,
            use_ipv6=self.config_desc.use_ipv6,
            use_docker_machine_manager=self.use_docker_machine_manager)

        dir_manager = self.task_server.task_computer.dir_manager

        log.info("Starting resource server ...")
        self.daemon_manager = HyperdriveDaemonManager(self.datadir)
        hyperdrive_ports = self.daemon_manager.start()

        resource_manager = HyperdriveResourceManager(dir_manager)
        self.resource_server = BaseResourceServer(resource_manager,
                                                  dir_manager, self.keys_auth,
                                                  self)

        def connect((p2p_port, task_port)):
            log.info('P2P server is listening on port %s', p2p_port)
            log.info('Task server is listening on port %s', task_port)

            dispatcher.send(signal='golem.p2p',
                            event='listening',
                            port=[p2p_port, task_port] +
                            list(hyperdrive_ports))

            listener = ClientTaskComputerEventListener(self)
            self.task_server.task_computer.register_listener(listener)
            self.p2pservice.connect_to_network()

            if self.monitor:
                self.diag_service.register(self.p2pservice,
                                           self.monitor.on_peer_snapshot)
                self.monitor.on_login()

        def terminate(*exceptions):
            log.error("Golem cannot listen on ports: %s", exceptions)
            self.quit()

        task = Deferred()
        p2p = Deferred()

        gatherResults([p2p, task],
                      consumeErrors=True).addCallbacks(connect, terminate)
        log.info("Starting p2p server ...")
        self.p2pservice.task_server = self.task_server
        self.p2pservice.set_resource_server(self.resource_server)
        self.p2pservice.set_metadata_manager(self)
        self.p2pservice.start_accepting(listening_established=p2p.callback,
                                        listening_failure=p2p.errback)

        log.info("Starting task server ...")
        self.task_server.start_accepting(listening_established=task.callback,
                                         listening_failure=task.errback)

    def init_monitor(self):
        metadata = self.__get_nodemetadatamodel()
        self.monitor = SystemMonitor(metadata, MONITOR_CONFIG)
        self.monitor.start()
        self.diag_service = DiagnosticsService(DiagnosticsOutputFormat.data)
        self.diag_service.register(VMDiagnosticsProvider(),
                                   self.monitor.on_vm_snapshot)
        self.diag_service.start_looping_call()

    def connect(self, socket_address):
        if isinstance(socket_address, Iterable):
            socket_address = SocketAddress(socket_address[0],
                                           int(socket_address[1]))

        log.debug("P2pservice connecting to %s on port %s",
                  socket_address.address, socket_address.port)
        self.p2pservice.connect(socket_address)

    def quit(self):
        if self.do_work_task.running:
            self.do_work_task.stop()
        if self.publish_task.running:
            self.publish_task.stop()
        if self.task_server:
            self.task_server.quit()
        if self.transaction_system:
            self.transaction_system.stop()
        if self.diag_service:
            self.diag_service.unregister_all()
        if self.daemon_manager:
            self.daemon_manager.stop()
        dispatcher.send(signal='golem.monitor', event='shutdown')
        if self.db:
            self.db.close()
        self._unlock_datadir()

    def key_changed(self):
        self.node.key = self.keys_auth.get_key_id()
        self.task_server.key_changed()
        self.p2pservice.key_changed()

    def stop_network(self):
        # FIXME: Implement this method properly - send disconnect package,
        # close connections etc.
        self.p2pservice = None
        self.task_server = None
        self.nodes_manager_client = None

    def enqueue_new_task(self, task):
        # FIXME: remove after the new interface has been integrated with
        if isinstance(task, dict):
            task = self.task_server.task_manager.create_task(task)
        else:
            task.header.max_price = int(task.header.max_price)

        resource_manager = self.resource_server.resource_manager
        task_manager = self.task_server.task_manager

        task_id = task.header.task_id
        key_id = self.keys_auth.key_id

        options = resource_manager.build_client_options(key_id)
        files = task.get_resources(None, resource_types["hashes"])

        deferred = self.resource_server.add_task(files, task_id, options)
        deferred.addCallback(lambda _: task_manager.add_new_task(task))

        return task

    def task_resource_send(self, task_id):
        self.task_server.task_manager.resources_send(task_id)

    def task_resource_collected(self, task_id, unpack_delta=True):
        self.task_server.task_computer.task_resource_collected(
            task_id, unpack_delta)

    def task_resource_failure(self, task_id, reason):
        self.task_server.task_computer.task_resource_failure(task_id, reason)

    def set_resource_port(self, resource_port):
        self.resource_port = resource_port
        self.p2pservice.set_resource_peer(self.node.prv_addr,
                                          self.resource_port)

    def run_test_task(self, t_dict):
        if self.task_tester is None:
            request = AsyncRequest(self._run_test_task, t_dict)
            async_run(request)
            return True

        if self.rpc_publisher:
            self.rpc_publisher.publish(Task.evt_task_test_status,
                                       TaskTestStatus.error,
                                       u"Another test is running")
        return False

    def _run_test_task(self, t_dict):
        def on_success(*args, **kwargs):
            self.task_tester = None
            self._publish(Task.evt_task_test_status, TaskTestStatus.success,
                          *args, **kwargs)

        def on_error(*args, **kwargs):
            self.task_tester = None
            self._publish(Task.evt_task_test_status, TaskTestStatus.error,
                          *args, **kwargs)

        t = DictSerializer.load(t_dict)
        self.task_tester = TaskTester(t, self.datadir, on_success, on_error)
        self.task_tester.run()
        self._publish(Task.evt_task_test_status, TaskTestStatus.started, True)

    def abort_test_task(self):
        with self.lock:
            if self.task_tester is not None:
                self.task_tester.end_comp()
                return True
            return False

    def create_task(self, t_dict):
        try:
            task = DictSerializer.load(t_dict)
            new_task = self.enqueue_new_task(task)
            return unicode(new_task.header.task_id)
        except Exception:
            log.exception("Cannot create task {}".format(t_dict))

    def abort_task(self, task_id):
        self.task_server.task_manager.abort_task(task_id)

    def restart_task(self, task_id):
        self.task_server.task_manager.restart_task(task_id)

    def restart_subtask(self, subtask_id):
        self.task_server.task_manager.restart_subtask(subtask_id)

    def pause_task(self, task_id):
        self.task_server.task_manager.pause_task(task_id)

    def resume_task(self, task_id):
        self.task_server.task_manager.resume_task(task_id)

    def delete_task(self, task_id):
        self.remove_task_header(task_id)
        self.remove_task(task_id)
        self.task_server.task_manager.delete_task(task_id)

    def get_node(self):
        return DictSerializer.dump(self.node)

    def get_node_name(self):
        name = self.config_desc.node_name
        return unicode(name) if name else u''

    def get_neighbours_degree(self):
        return self.p2pservice.get_peers_degree()

    def get_suggested_addr(self, key_id):
        return self.p2pservice.suggested_address.get(key_id)

    def get_suggested_conn_reverse(self, key_id):
        return self.p2pservice.get_suggested_conn_reverse(key_id)

    def get_resource_peers(self):
        self.p2pservice.send_get_resource_peers()

    def get_peers(self):
        return self.p2pservice.peers.values()

    def get_known_peers(self):
        peers = self.p2pservice.free_peers or []
        return [
            DictSerializer.dump(PeerSessionInfo(p), typed=False) for p in peers
        ]

    def get_connected_peers(self):
        peers = self.get_peers() or []
        return [
            DictSerializer.dump(PeerSessionInfo(p), typed=False) for p in peers
        ]

    def get_public_key(self):
        return self.keys_auth.public_key

    def get_dir_manager(self):
        if self.task_server:
            return self.task_server.task_computer.dir_manager

    def load_keys_from_file(self, file_name):
        if file_name != "":
            return self.keys_auth.load_from_file(file_name)
        return False

    def save_keys_to_files(self, private_key_path, public_key_path):
        return self.keys_auth.save_to_files(private_key_path, public_key_path)

    def get_key_id(self):
        return self.get_client_id()

    def get_difficulty(self):
        return self.keys_auth.get_difficulty()

    def get_client_id(self):
        key_id = self.keys_auth.get_key_id()
        return unicode(key_id) if key_id else None

    def get_node_key(self):
        key = self.node.key
        return unicode(key) if key else None

    def get_settings(self):
        return DictSerializer.dump(self.config_desc)

    def get_setting(self, key):
        if not hasattr(self.config_desc, key):
            raise KeyError(u"Unknown setting: {}".format(key))

        value = getattr(self.config_desc, key)
        if key in ConfigApprover.numeric_opt:
            return unicode(value)
        return value

    def update_setting(self, key, value):
        if not hasattr(self.config_desc, key):
            raise KeyError(u"Unknown setting: {}".format(key))
        setattr(self.config_desc, key, value)
        self.change_config(self.config_desc)

    def update_settings(self, settings_dict, run_benchmarks=False):
        cfg_desc = DictSerializer.load(settings_dict)
        self.change_config(cfg_desc, run_benchmarks)

    def get_datadir(self):
        return unicode(self.datadir)

    def get_p2p_port(self):
        return self.p2pservice.cur_port

    def get_task_server_port(self):
        return self.task_server.cur_port

    def get_task_count(self):
        return len(self.task_server.task_keeper.get_all_tasks())

    def get_task(self, task_id):
        return self.task_server.task_manager.get_task_dict(task_id)

    def get_tasks(self, task_id=None):
        if task_id:
            return self.task_server.task_manager.get_task_dict(task_id)
        return self.task_server.task_manager.get_tasks_dict()

    def get_subtasks(self, task_id):
        return self.task_server.task_manager.get_subtasks_dict(task_id)

    def get_subtasks_borders(self, task_id):
        return self.task_server.task_manager.get_subtasks_borders(task_id)

    def get_subtask(self, subtask_id):
        return self.task_server.task_manager.get_subtask_dict(subtask_id)

    def get_task_preview(self, task_id, single=False):
        return self.task_server.task_manager.get_task_preview(task_id,
                                                              single=single)

    def get_task_stats(self):
        return {
            u'in_network': self.get_task_count(),
            u'supported': self.get_supported_task_count(),
            u'subtasks_computed': self.get_computed_task_count(),
            u'subtasks_with_errors': self.get_error_task_count(),
            u'subtasks_with_timeout': self.get_timeout_task_count()
        }

    def get_supported_task_count(self):
        return len(self.task_server.task_keeper.supported_tasks)

    def get_computed_task_count(self):
        return self.task_server.task_computer.stats.get_stats('computed_tasks')

    def get_timeout_task_count(self):
        return self.task_server\
            .task_computer.stats.get_stats('tasks_with_timeout')

    def get_error_task_count(self):
        return self.task_server\
            .task_computer.stats.get_stats('tasks_with_errors')

    def get_payment_address(self):
        address = self.transaction_system.get_payment_address()
        return unicode(address) if address else None

    @inlineCallbacks
    def get_balance(self):
        if self.use_transaction_system():
            req = AsyncRequest(self.transaction_system.get_balance)
            b, ab, d = yield async_run(req)
            if b is not None:
                returnValue((unicode(b), unicode(ab), unicode(d)))
        returnValue((None, None, None))

    def get_payments_list(self):
        if self.use_transaction_system():
            payments = self.transaction_system.get_payments_list()
            return map(self._map_payment, payments)
        return ()

    def get_incomes_list(self):
        # Will be implemented in incomes_core
        return []

    @classmethod
    def _map_payment(cls, obj):
        obj["payee"] = to_unicode(obj["payee"])
        obj["value"] = to_unicode(obj["value"])
        obj["fee"] = to_unicode(obj["fee"])
        return obj

    def get_task_cost(self, task_id):
        """
        Get current cost of the task defined by @task_id
        :param task_id: Task ID
        :return: Cost of the task
        """
        cost = self.task_server.task_manager.get_payment_for_task_id(task_id)
        if cost is None:
            return 0.0
        return cost

    def use_transaction_system(self):
        return bool(self.transaction_system)

    def get_computing_trust(self, node_id):
        if self.use_ranking():
            return self.ranking.get_computing_trust(node_id)
        return None

    def get_requesting_trust(self, node_id):
        if self.use_ranking():
            return self.ranking.get_requesting_trust(node_id)
        return None

    def get_description(self):
        try:
            account, _ = Account.get_or_create(node_id=self.get_client_id())
            return account.description
        except Exception as e:
            return u"An error has occurred {}".format(e)

    def change_description(self, description):
        self.get_description()
        q = Account.update(description=description)\
            .where(Account.node_id == self.get_client_id())
        q.execute()

    def use_ranking(self):
        return bool(self.ranking)

    def want_to_start_task_session(self, key_id, node_id, conn_id):
        self.p2pservice.want_to_start_task_session(key_id, node_id, conn_id)

    def inform_about_task_nat_hole(self, key_id, rv_key_id, addr, port,
                                   ans_conn_id):
        self.p2pservice.inform_about_task_nat_hole(key_id, rv_key_id, addr,
                                                   port, ans_conn_id)

    def inform_about_nat_traverse_failure(self, key_id, res_key_id, conn_id):
        self.p2pservice.inform_about_nat_traverse_failure(
            key_id, res_key_id, conn_id)

    # CLIENT CONFIGURATION
    def set_rpc_server(self, rpc_server):
        self.rpc_server = rpc_server
        return self.rpc_server.add_service(self)

    def change_config(self, new_config_desc, run_benchmarks=False):
        self.config_desc = self.config_approver.change_config(new_config_desc)
        self.cfg.change_config(self.config_desc)
        self.p2pservice.change_config(self.config_desc)
        self.upsert_hw_preset(HardwarePresets.from_config(self.config_desc))
        if self.task_server:
            self.task_server.change_config(self.config_desc,
                                           run_benchmarks=run_benchmarks)
        dispatcher.send(signal='golem.monitor',
                        event='config_update',
                        meta_data=self.__get_nodemetadatamodel())

    def register_nodes_manager_client(self, nodes_manager_client):
        self.nodes_manager_client = nodes_manager_client

    def change_timeouts(self, task_id, full_task_timeout, subtask_timeout):
        self.task_server.change_timeouts(task_id, full_task_timeout,
                                         subtask_timeout)

    def query_task_state(self, task_id):
        state = self.task_server.task_manager.query_task_state(task_id)
        if state:
            return DictSerializer.dump(state)

    def pull_resources(self, task_id, resources, client_options=None):
        self.resource_server.download_resources(resources,
                                                task_id,
                                                client_options=client_options)

    def add_resource_peer(self, node_name, addr, port, key_id, node_info):
        self.resource_server.add_resource_peer(node_name, addr, port, key_id,
                                               node_info)

    def get_res_dirs(self):
        return {
            u"computing": self.get_computed_files_dir(),
            u"received": self.get_received_files_dir(),
            u"distributed": self.get_distributed_files_dir()
        }

    def get_res_dirs_sizes(self):
        return {
            unicode(name): unicode(du(d))
            for name, d in self.get_res_dirs().iteritems()
        }

    def get_res_dir(self, dir_type):
        if dir_type == DirectoryType.COMPUTED:
            return self.get_computed_files_dir()
        elif dir_type == DirectoryType.DISTRIBUTED:
            return self.get_distributed_files_dir()
        elif dir_type == DirectoryType.RECEIVED:
            return self.get_received_files_dir()
        raise Exception(u"Unknown dir type: {}".format(dir_type))

    def get_computed_files_dir(self):
        return unicode(self.task_server.get_task_computer_root())

    def get_received_files_dir(self):
        return unicode(self.task_server.task_manager.get_task_manager_root())

    def get_distributed_files_dir(self):
        return unicode(self.resource_server.get_distributed_resource_root())

    def clear_dir(self, dir_type):
        if dir_type == DirectoryType.COMPUTED:
            return self.remove_computed_files()
        elif dir_type == DirectoryType.DISTRIBUTED:
            return self.remove_distributed_files()
        elif dir_type == DirectoryType.RECEIVED:
            return self.remove_received_files()
        raise Exception(u"Unknown dir type: {}".format(dir_type))

    def remove_computed_files(self):
        dir_manager = DirManager(self.datadir)
        dir_manager.clear_dir(self.get_computed_files_dir())

    def remove_distributed_files(self):
        dir_manager = DirManager(self.datadir)
        dir_manager.clear_dir(self.get_distributed_files_dir())

    def remove_received_files(self):
        dir_manager = DirManager(self.datadir)
        dir_manager.clear_dir(self.get_received_files_dir())

    def remove_task(self, task_id):
        self.p2pservice.remove_task(task_id)

    def remove_task_header(self, task_id):
        self.task_server.remove_task_header(task_id)

    def get_known_tasks(self):
        headers = {}
        for key, header in self.task_server.task_keeper.task_headers.iteritems(
        ):  # noqa
            headers[unicode(key)] = DictSerializer.dump(header)
        return headers

    def get_environments(self):
        envs = copy(self.environments_manager.get_environments())
        return [{
            u'id': unicode(env.get_id()),
            u'supported': env.supported(),
            u'accepted': env.is_accepted(),
            u'performance': env.get_performance(self.config_desc),
            u'description': unicode(env.short_description)
        } for env in envs]

    @inlineCallbacks
    def run_benchmark(self, env_id):
        # TODO: move benchmarks to environments
        from apps.blender.blenderenvironment import BlenderEnvironment
        from apps.lux.luxenvironment import LuxRenderEnvironment

        deferred = Deferred()

        if env_id == BlenderEnvironment.get_id():
            self.task_server.task_computer.run_blender_benchmark(
                deferred.callback, deferred.errback)
        elif env_id == LuxRenderEnvironment.get_id():
            self.task_server.task_computer.run_lux_benchmark(
                deferred.callback, deferred.errback)
        else:
            raise Exception("Unknown environment: {}".format(env_id))

        result = yield deferred
        returnValue(result)

    def enable_environment(self, env_id):
        self.environments_manager.change_accept_tasks(env_id, True)

    def disable_environment(self, env_id):
        self.environments_manager.change_accept_tasks(env_id, False)

    def send_gossip(self, gossip, send_to):
        return self.p2pservice.send_gossip(gossip, send_to)

    def send_stop_gossip(self):
        return self.p2pservice.send_stop_gossip()

    def collect_gossip(self):
        return self.p2pservice.pop_gossips()

    def collect_stopped_peers(self):
        return self.p2pservice.pop_stop_gossip_form_peers()

    def collect_neighbours_loc_ranks(self):
        return self.p2pservice.pop_neighbours_loc_ranks()

    def push_local_rank(self, node_id, loc_rank):
        self.p2pservice.push_local_rank(node_id, loc_rank)

    def check_payments(self):
        if not self.transaction_system:
            return
        after_deadline_nodes = self.transaction_system.check_payments()
        for node_id in after_deadline_nodes:
            Trust.PAYMENT.decrease(node_id)

    @staticmethod
    def save_task_preset(preset_name, task_type, data):
        taskpreset.save_task_preset(preset_name, task_type, data)

    @staticmethod
    def get_task_presets(task_type):
        log.info("Loading presets for {}".format(task_type))
        return taskpreset.get_task_presets(task_type)

    @staticmethod
    def delete_task_preset(task_type, preset_name):
        taskpreset.delete_task_preset(task_type, preset_name)

    def _publish(self, event_name, *args, **kwargs):
        if self.rpc_publisher:
            self.rpc_publisher.publish(event_name, *args, **kwargs)

    def lock_config(self, on=True):
        self._publish(UI.evt_lock_config, on)

    def config_changed(self):
        self._publish(Environment.evt_opts_changed)

    def __get_nodemetadatamodel(self):
        return NodeMetadataModel(self.get_client_id(), self.session_id,
                                 sys.platform, APP_VERSION,
                                 self.get_description(), self.config_desc)

    def __try_to_change_to_number(self,
                                  old_value,
                                  new_value,
                                  to_int=False,
                                  to_float=False,
                                  name="Config"):
        try:
            if to_int:
                new_value = int(new_value)
            elif to_float:
                new_value = float(new_value)
        except ValueError:
            log.warning("%s value '%s' is not a number", name, new_value)
            new_value = old_value
        return new_value

    def __do_work(self):
        if not self.p2pservice:
            return

        if self.config_desc.send_pings:
            self.p2pservice.ping_peers(self.config_desc.pings_interval)

        try:
            self.p2pservice.sync_network()
        except Exception:
            log.exception("p2pservice.sync_network failed")
        try:
            self.task_server.sync_network()
        except Exception:
            log.exception("task_server.sync_network failed")
        try:
            self.resource_server.sync_network()
        except Exception:
            log.exception("resource_server.sync_network failed")
        try:
            self.ranking.sync_network()
        except Exception:
            log.exception("ranking.sync_network failed")
        try:
            self.check_payments()
        except Exception:
            log.exception("check_payments failed")

    @inlineCallbacks
    def __publish_events(self):
        now = time.time()
        delta = now - self.last_nss_time

        if delta > max(self.config_desc.node_snapshot_interval, 1):
            dispatcher.send(
                signal='golem.monitor',
                event='stats_snapshot',
                known_tasks=self.get_task_count(),
                supported_tasks=self.get_supported_task_count(),
                stats=self.task_server.task_computer.stats,
            )
            dispatcher.send(
                signal='golem.monitor',
                event='task_computer_snapshot',
                task_computer=self.task_server.task_computer,
            )
            # with self.snapshot_lock:
            #     self.__make_node_state_snapshot()
            #     self.manager_server.sendStateMessage(self.last_node_state_snapshot)
            self.last_nss_time = time.time()

        delta = now - self.last_net_check_time
        if delta >= self.config_desc.network_check_interval:
            self.last_net_check_time = time.time()
            self._publish(Network.evt_connection, self.connection_status())

        if now - self.last_tasks_time >= PUBLISH_TASKS_INTERVAL:
            self._publish(Task.evt_task_list, self.get_tasks())

        if now - self.last_balance_time >= PUBLISH_BALANCE_INTERVAL:
            try:
                gnt, av_gnt, eth = yield self.get_balance()
            except Exception as exc:
                log.debug('Error retrieving balance: {}'.format(exc))
            else:
                self._publish(
                    Payments.evt_balance, {
                        u'GNT': unicode(gnt),
                        u'GNT_available': unicode(av_gnt),
                        u'ETH': unicode(eth)
                    })

    def __make_node_state_snapshot(self, is_running=True):
        peers_num = len(self.p2pservice.peers)
        last_network_messages = self.p2pservice.get_last_messages()

        if self.task_server:
            tasks_num = len(self.task_server.task_keeper.task_headers)
            r_tasks_progs = self.task_server.task_computer.get_progresses()
            l_tasks_progs = self.task_server.task_manager.get_progresses()
            last_task_messages = self.task_server.get_last_messages()
            self.last_node_state_snapshot = NodeStateSnapshot(
                is_running, self.config_desc.node_name, peers_num, tasks_num,
                self.p2pservice.node.pub_addr, self.p2pservice.node.pub_port,
                last_network_messages, last_task_messages, r_tasks_progs,
                l_tasks_progs)
        else:
            self.last_node_state_snapshot = NodeStateSnapshot(
                self.config_desc.node_name, peers_num)

        if self.nodes_manager_client:
            self.nodes_manager_client.send_client_state_snapshot(
                self.last_node_state_snapshot)

    def connection_status(self):
        listen_port = self.get_p2p_port()
        task_server_port = self.get_task_server_port()

        if listen_port == 0 or task_server_port == 0:
            return u"Application not listening, check config file."

        messages = []

        if self.node.port_status:
            statuses = self.node.port_status.split('\n')
            failures = filter(lambda e: e.find('open') == -1, statuses)
            messages.append(u"Port " + u", ".join(failures) + u".")

        if self.get_connected_peers():
            messages.append(u"Connected")
        else:
            messages.append(u"Not connected to Golem Network, "
                            u"check seed parameters.")

        return u' '.join(messages)

    def get_metadata(self):
        metadata = dict()
        # if self.ipfs_manager:
        #     metadata.update(self.ipfs_manager.get_metadata())
        return metadata

    def interpret_metadata(self, metadata, address, port, node_info):
        pass
        # if self.config_desc and node_info and metadata:
        #     seed_addresses = self.p2pservice.get_seeds()
        #     node_addresses = [
        #         (address, port),
        #         (node_info.pub_addr, node_info.pub_port)
        #     ]
        #     self.ipfs_manager.interpret_metadata(metadata,
        #                                          seed_addresses,
        #                                          node_addresses)

    def get_status(self):
        progress = self.task_server.task_computer.get_progresses()
        if len(progress) > 0:
            msg = u"Computing {} subtask(s):".format(len(progress))
            for k, v in progress.iteritems():
                msg = u"{} \n {} ({}%)\n".format(msg, k,
                                                 v.get_progress() * 100)
        elif self.config_desc.accept_tasks:
            msg = u"Waiting for tasks...\n"
        else:
            msg = u"Not accepting tasks\n"

        peers = self.p2pservice.get_peers()

        msg += u"Active peers in network: {}\n".format(len(peers))
        return msg

    def activate_hw_preset(self, name, run_benchmarks=False):
        HardwarePresets.update_config(name, self.config_desc)
        if hasattr(self, 'task_server') and self.task_server:
            self.task_server.change_config(self.config_desc,
                                           run_benchmarks=run_benchmarks)

    def __lock_datadir(self):
        if not path.exists(self.datadir):
            # Create datadir if not exists yet.
            # TODO: It looks we have the same code in many places
            makedirs(self.datadir)
        self.__datadir_lock = open(path.join(self.datadir, "LOCK"), 'w')
        flags = filelock.LOCK_EX | filelock.LOCK_NB
        try:
            filelock.lock(self.__datadir_lock, flags)
        except IOError:
            raise IOError("Data dir {} used by other Golem instance".format(
                self.datadir))

    def _unlock_datadir(self):
        # solves locking issues on OS X
        try:
            filelock.unlock(self.__datadir_lock)
        except Exception:
            pass
        self.__datadir_lock.close()