Show More
@@ -1,135 +1,139 b'' | |||||
1 | """Base class for a Comm""" |
|
1 | """Base class for a Comm""" | |
2 |
|
2 | |||
3 | # Copyright (c) IPython Development Team. |
|
3 | # Copyright (c) IPython Development Team. | |
4 | # Distributed under the terms of the Modified BSD License. |
|
4 | # Distributed under the terms of the Modified BSD License. | |
5 |
|
5 | |||
6 | import uuid |
|
6 | import uuid | |
7 |
|
7 | |||
8 | from IPython.config import LoggingConfigurable |
|
8 | from IPython.config import LoggingConfigurable | |
9 | from IPython.core.getipython import get_ipython |
|
9 | from IPython.core.getipython import get_ipython | |
10 |
|
10 | |||
11 | from IPython.utils.jsonutil import json_clean |
|
11 | from IPython.utils.jsonutil import json_clean | |
12 | from IPython.utils.traitlets import Instance, Unicode, Bytes, Bool, Dict, Any |
|
12 | from IPython.utils.traitlets import Instance, Unicode, Bytes, Bool, Dict, Any | |
13 |
|
13 | |||
14 |
|
14 | |||
15 | class Comm(LoggingConfigurable): |
|
15 | class Comm(LoggingConfigurable): | |
16 |
|
16 | |||
17 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
|
17 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') | |
18 | def _shell_default(self): |
|
18 | def _shell_default(self): | |
19 | return get_ipython() |
|
19 | return get_ipython() | |
20 |
|
20 | |||
21 | iopub_socket = Any() |
|
21 | iopub_socket = Any() | |
22 | def _iopub_socket_default(self): |
|
22 | def _iopub_socket_default(self): | |
23 | return self.shell.kernel.iopub_socket |
|
23 | return self.shell.kernel.iopub_socket | |
24 | session = Instance('IPython.kernel.zmq.session.Session') |
|
24 | session = Instance('IPython.kernel.zmq.session.Session') | |
25 | def _session_default(self): |
|
25 | def _session_default(self): | |
26 | if self.shell is None: |
|
26 | if self.shell is None: | |
27 | return |
|
27 | return | |
28 | return self.shell.kernel.session |
|
28 | return self.shell.kernel.session | |
29 |
|
29 | |||
30 | target_name = Unicode('comm') |
|
30 | target_name = Unicode('comm') | |
31 |
|
31 | |||
32 | topic = Bytes() |
|
32 | topic = Bytes() | |
33 | def _topic_default(self): |
|
33 | def _topic_default(self): | |
34 | return ('comm-%s' % self.comm_id).encode('ascii') |
|
34 | return ('comm-%s' % self.comm_id).encode('ascii') | |
35 |
|
35 | |||
36 | _open_data = Dict(help="data dict, if any, to be included in comm_open") |
|
36 | _open_data = Dict(help="data dict, if any, to be included in comm_open") | |
37 | _close_data = Dict(help="data dict, if any, to be included in comm_close") |
|
37 | _close_data = Dict(help="data dict, if any, to be included in comm_close") | |
38 |
|
38 | |||
39 | _msg_callback = Any() |
|
39 | _msg_callback = Any() | |
40 | _close_callback = Any() |
|
40 | _close_callback = Any() | |
41 |
|
41 | |||
42 | _closed = Bool(False) |
|
42 | _closed = Bool(False) | |
43 | comm_id = Unicode() |
|
43 | comm_id = Unicode() | |
44 | def _comm_id_default(self): |
|
44 | def _comm_id_default(self): | |
45 | return uuid.uuid4().hex |
|
45 | return uuid.uuid4().hex | |
46 |
|
46 | |||
47 | primary = Bool(True, help="Am I the primary or secondary Comm?") |
|
47 | primary = Bool(True, help="Am I the primary or secondary Comm?") | |
48 |
|
48 | |||
49 | def __init__(self, target_name='', data=None, **kwargs): |
|
49 | def __init__(self, target_name='', data=None, **kwargs): | |
50 | if target_name: |
|
50 | if target_name: | |
51 | kwargs['target_name'] = target_name |
|
51 | kwargs['target_name'] = target_name | |
52 | super(Comm, self).__init__(**kwargs) |
|
52 | super(Comm, self).__init__(**kwargs) | |
53 | if self.primary: |
|
53 | if self.primary: | |
54 | # I am primary, open my peer. |
|
54 | # I am primary, open my peer. | |
55 | self.open(data) |
|
55 | self.open(data) | |
56 |
|
56 | |||
57 | def _publish_msg(self, msg_type, data=None, metadata=None, **keys): |
|
57 | def _publish_msg(self, msg_type, data=None, metadata=None, **keys): | |
58 | """Helper for sending a comm message on IOPub""" |
|
58 | """Helper for sending a comm message on IOPub""" | |
59 | data = {} if data is None else data |
|
59 | data = {} if data is None else data | |
60 | metadata = {} if metadata is None else metadata |
|
60 | metadata = {} if metadata is None else metadata | |
61 | content = json_clean(dict(data=data, comm_id=self.comm_id, **keys)) |
|
61 | content = json_clean(dict(data=data, comm_id=self.comm_id, **keys)) | |
62 | self.session.send(self.iopub_socket, msg_type, |
|
62 | self.session.send(self.iopub_socket, msg_type, | |
63 | content, |
|
63 | content, | |
64 | metadata=json_clean(metadata), |
|
64 | metadata=json_clean(metadata), | |
65 | parent=self.shell.get_parent(), |
|
65 | parent=self.shell.get_parent(), | |
66 | ident=self.topic, |
|
66 | ident=self.topic, | |
67 | ) |
|
67 | ) | |
68 |
|
68 | |||
69 | def __del__(self): |
|
69 | def __del__(self): | |
70 | """trigger close on gc""" |
|
70 | """trigger close on gc""" | |
71 | self.close() |
|
71 | self.close() | |
72 |
|
72 | |||
73 | # publishing messages |
|
73 | # publishing messages | |
74 |
|
74 | |||
75 | def open(self, data=None, metadata=None): |
|
75 | def open(self, data=None, metadata=None): | |
76 | """Open the frontend-side version of this comm""" |
|
76 | """Open the frontend-side version of this comm""" | |
77 | if data is None: |
|
77 | if data is None: | |
78 | data = self._open_data |
|
78 | data = self._open_data | |
79 | self._closed = False |
|
79 | self._closed = False | |
80 | get_ipython().comm_manager.register_comm(self) |
|
80 | ip = get_ipython() | |
|
81 | if hasattr(ip, 'comm_manager'): | |||
|
82 | ip.comm_manager.register_comm(self) | |||
81 | self._publish_msg('comm_open', data, metadata, target_name=self.target_name) |
|
83 | self._publish_msg('comm_open', data, metadata, target_name=self.target_name) | |
82 |
|
84 | |||
83 | def close(self, data=None, metadata=None): |
|
85 | def close(self, data=None, metadata=None): | |
84 | """Close the frontend-side version of this comm""" |
|
86 | """Close the frontend-side version of this comm""" | |
85 | if self._closed: |
|
87 | if self._closed: | |
86 | # only close once |
|
88 | # only close once | |
87 | return |
|
89 | return | |
88 | if data is None: |
|
90 | if data is None: | |
89 | data = self._close_data |
|
91 | data = self._close_data | |
90 | self._publish_msg('comm_close', data, metadata) |
|
92 | self._publish_msg('comm_close', data, metadata) | |
91 | get_ipython().comm_manager.unregister_comm(self) |
|
93 | ip = get_ipython() | |
|
94 | if hasattr(ip, 'comm_manager'): | |||
|
95 | ip.comm_manager.unregister_comm(self) | |||
92 | self._closed = True |
|
96 | self._closed = True | |
93 |
|
97 | |||
94 | def send(self, data=None, metadata=None): |
|
98 | def send(self, data=None, metadata=None): | |
95 | """Send a message to the frontend-side version of this comm""" |
|
99 | """Send a message to the frontend-side version of this comm""" | |
96 | self._publish_msg('comm_msg', data, metadata) |
|
100 | self._publish_msg('comm_msg', data, metadata) | |
97 |
|
101 | |||
98 | # registering callbacks |
|
102 | # registering callbacks | |
99 |
|
103 | |||
100 | def on_close(self, callback): |
|
104 | def on_close(self, callback): | |
101 | """Register a callback for comm_close |
|
105 | """Register a callback for comm_close | |
102 |
|
106 | |||
103 | Will be called with the `data` of the close message. |
|
107 | Will be called with the `data` of the close message. | |
104 |
|
108 | |||
105 | Call `on_close(None)` to disable an existing callback. |
|
109 | Call `on_close(None)` to disable an existing callback. | |
106 | """ |
|
110 | """ | |
107 | self._close_callback = callback |
|
111 | self._close_callback = callback | |
108 |
|
112 | |||
109 | def on_msg(self, callback): |
|
113 | def on_msg(self, callback): | |
110 | """Register a callback for comm_msg |
|
114 | """Register a callback for comm_msg | |
111 |
|
115 | |||
112 | Will be called with the `data` of any comm_msg messages. |
|
116 | Will be called with the `data` of any comm_msg messages. | |
113 |
|
117 | |||
114 | Call `on_msg(None)` to disable an existing callback. |
|
118 | Call `on_msg(None)` to disable an existing callback. | |
115 | """ |
|
119 | """ | |
116 | self._msg_callback = callback |
|
120 | self._msg_callback = callback | |
117 |
|
121 | |||
118 | # handling of incoming messages |
|
122 | # handling of incoming messages | |
119 |
|
123 | |||
120 | def handle_close(self, msg): |
|
124 | def handle_close(self, msg): | |
121 | """Handle a comm_close message""" |
|
125 | """Handle a comm_close message""" | |
122 | self.log.debug("handle_close[%s](%s)", self.comm_id, msg) |
|
126 | self.log.debug("handle_close[%s](%s)", self.comm_id, msg) | |
123 | if self._close_callback: |
|
127 | if self._close_callback: | |
124 | self._close_callback(msg) |
|
128 | self._close_callback(msg) | |
125 |
|
129 | |||
126 | def handle_msg(self, msg): |
|
130 | def handle_msg(self, msg): | |
127 | """Handle a comm_msg message""" |
|
131 | """Handle a comm_msg message""" | |
128 | self.log.debug("handle_msg[%s](%s)", self.comm_id, msg) |
|
132 | self.log.debug("handle_msg[%s](%s)", self.comm_id, msg) | |
129 | if self._msg_callback: |
|
133 | if self._msg_callback: | |
130 | self.shell.events.trigger('pre_execute') |
|
134 | self.shell.events.trigger('pre_execute') | |
131 | self._msg_callback(msg) |
|
135 | self._msg_callback(msg) | |
132 | self.shell.events.trigger('post_execute') |
|
136 | self.shell.events.trigger('post_execute') | |
133 |
|
137 | |||
134 |
|
138 | |||
135 | __all__ = ['Comm'] |
|
139 | __all__ = ['Comm'] |
General Comments 0
You need to be logged in to leave comments.
Login now