Server
penvm.server.kernelmanager
All server-side kernels are registered with the manager and accessible by name.
KernelManager
Bases: BaseObject
Manage server-side kernels.
Source code in penvm/src/server/penvm/server/kernelmanager.py
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__init__(machine)
Initialize.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
machine |
Machine
|
Machine. |
required |
Source code in penvm/src/server/penvm/server/kernelmanager.py
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drop(name)
Drop kernel by name.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
name |
str
|
Kernel name. |
required |
Source code in penvm/src/server/penvm/server/kernelmanager.py
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get(name)
Get kernel by name.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
name |
str
|
Kernel name. |
required |
Source code in penvm/src/server/penvm/server/kernelmanager.py
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list()
Get list of kernel names.
Returns:
Type | Description |
---|---|
List[str]
|
Kernel names. |
Source code in penvm/src/server/penvm/server/kernelmanager.py
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set(name, kernel)
Register kernel by name.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
name |
str
|
Kernel name. |
required |
kernel |
Kernel
|
Kernel. |
required |
Source code in penvm/src/server/penvm/server/kernelmanager.py
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start()
Start.
No background threads.
Source code in penvm/src/server/penvm/server/kernelmanager.py
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state()
Get object state.
Returns:
Type | Description |
---|---|
State
|
|
Source code in penvm/src/server/penvm/server/kernelmanager.py
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penvm.server.machine
Machine
Bases: BaseObject
Server-side machine.
Provides access to all "managers" (e.g, connection, kernel, session, store), main incoming and outgoing message queues, and state/control to support debug mode.
Source code in penvm/src/server/penvm/server/machine.py
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__init__(host, port, sslprofile=None, machineid=None)
Set up server-side machine.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
host |
str
|
Host address. |
required |
port |
int
|
Port. |
required |
sslprofile |
Union[str, None]
|
SSL profile for SSL context. |
None
|
machineid |
Union[str, None]
|
Machine id. Generated if not provided. |
None
|
Source code in penvm/src/server/penvm/server/machine.py
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features()
Get a dictionary of features.
Returns:
Type | Description |
---|---|
Dict
|
Dictionary of features. |
Source code in penvm/src/server/penvm/server/machine.py
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get_addr_port()
Get machine listener address and port.
Returns:
Type | Description |
---|---|
Tuple[str, int]
|
Tuple of listener host and port. |
Source code in penvm/src/server/penvm/server/machine.py
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get_session(sessionid='default')
Get/create session.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
str
|
Session id (optional). |
'default'
|
Returns:
Type | Description |
---|---|
Session
|
Session. |
Source code in penvm/src/server/penvm/server/machine.py
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get_sslcontext(sslprofile)
Load server-side SSLContext based on named ssl profile.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sslprofile |
Union[str, None]
|
SSL profile name. |
required |
Returns:
Type | Description |
---|---|
Union[SSLContext, None]
|
SSLContext. |
Source code in penvm/src/server/penvm/server/machine.py
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imq_put(msg)
Triage message and put on proper session incoming message queue.
Note: This is where incoming requests result in session creation, then request processing!
Parameters:
Name | Type | Description | Default |
---|---|---|---|
msg |
Message
|
Message to enqueue. |
required |
Source code in penvm/src/server/penvm/server/machine.py
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omq_put(msg)
Triage message and put on proper connection outgoing message queue.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
msg |
Message
|
Message to enqueue. |
required |
Source code in penvm/src/server/penvm/server/machine.py
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pop_session(sessionid='default')
Pop session.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
str
|
Session id. |
'default'
|
Returns:
Type | Description |
---|---|
Session
|
Session. |
Source code in penvm/src/server/penvm/server/machine.py
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run()
Run "runnable" managers.
Source code in penvm/src/server/penvm/server/machine.py
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set_debug(enabled)
Set debug mode
Parameters:
Name | Type | Description | Default |
---|---|---|---|
enabled |
bool
|
New state for debug mode. |
required |
Source code in penvm/src/server/penvm/server/machine.py
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shutdown(now=False)
Shutdown machine.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
now |
bool
|
To shut down "now". |
False
|
Source code in penvm/src/server/penvm/server/machine.py
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start()
Start machine.
Source code in penvm/src/server/penvm/server/machine.py
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state()
Get object state.
Returns:
Type | Description |
---|---|
State
|
|
Source code in penvm/src/server/penvm/server/machine.py
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step_debug()
Allow a step if in debug mode.
Source code in penvm/src/server/penvm/server/machine.py
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stop()
Step machine.
Source code in penvm/src/server/penvm/server/machine.py
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wait()
Wait (indefinitely) for machine to exit.
Source code in penvm/src/server/penvm/server/machine.py
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penvm.server.processor
Processor
Bases: BaseObject
Runs kernel operations.
Kernel operations are scheduled by the session and run on the
processor. Operations are run on a selected kernel. Up to
max_threads
messages can be processsed at a time.
The number of running "threads" can be adjusted dynamically with
max_threads
limiting the number of running thread. Scheduling of
new threads resumes when the number of running threads goes below
max_threads
.
Source code in penvm/src/server/penvm/server/processor.py
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__init__(session, kernelname='default')
Initialize.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
session |
Session
|
Owning session. |
required |
kernelname |
str
|
Kernel name. |
'default'
|
Source code in penvm/src/server/penvm/server/processor.py
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active_count()
Get number of running threads.
Returns:
Type | Description |
---|---|
int
|
Number of running threads. |
Source code in penvm/src/server/penvm/server/processor.py
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get_thread_reqids()
Get list of request ids for each running thread.
Returns:
Type | Description |
---|---|
List[str]
|
List of request ids. |
Source code in penvm/src/server/penvm/server/processor.py
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run_thread(fn, fargs)
Runs a thread (to handle a request).
Machinery manages creating a context, starting a thread,
adhering to the thread limit, ThreadInterrupt
handling,
tracking information, and runsem
semaphore.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
fn |
Callable
|
Function to call. |
required |
fargs |
List
|
Arguments to pass to function. |
required |
Source code in penvm/src/server/penvm/server/processor.py
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schedule(ctxt, req)
Schedule thread to run the requested kernel operation.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
ctxt |
OpContext
|
Context in which to run operation. |
required |
req |
Message
|
Request message. |
required |
Source code in penvm/src/server/penvm/server/processor.py
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set_max_threads(n)
Set the upper limit of the number of threads to run.
Updates the runsem
semaphore to allow acquisition, if
possible.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
n |
int
|
Maximum number of threads. |
required |
Source code in penvm/src/server/penvm/server/processor.py
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start()
Start main processor thread.
Source code in penvm/src/server/penvm/server/processor.py
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state()
Get object state.
Returns:
Type | Description |
---|---|
State
|
|
Source code in penvm/src/server/penvm/server/processor.py
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terminate_thread(reqid)
Forcefully terminate a running thread.
A ThreadInterrupt
exception is raised for the thread.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
reqid |
str
|
Request id. |
required |
Source code in penvm/src/server/penvm/server/processor.py
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penvm.server.session
A (server-side) session isolates communication, operations, and processing. Except for special kernel operations which allow for one session to affect another, there are no inter-session dependencies.
Each session has its own incoming and outgoing message queues.
Each session has and manages its own Processor
which performs all
session-related processing.
Concurrency is supported by the Processor
(dynamically adjustable
number of threads) and between sessions. Which means that while
one/some session(s) may be blocked, others may not be.
Session
Bases: BaseObject
Server-side session.
Source code in penvm/src/server/penvm/server/session.py
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__init__(machine, sessionid, kernelname='default')
Initialize.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
machine |
Machine
|
Owning machine. |
required |
sessionid |
str
|
Session id. |
required |
kernelname |
str
|
Kernel name. |
'default'
|
Source code in penvm/src/server/penvm/server/session.py
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is_empty()
Return if session is "empty", and therefore deletable.
Returns:
Type | Description |
---|---|
bool
|
"Emptiness" status. |
Source code in penvm/src/server/penvm/server/session.py
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is_running()
Return running status.
Returns:
Type | Description |
---|---|
bool
|
Running status. |
Source code in penvm/src/server/penvm/server/session.py
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run()
Run session.
Loops until self.exit
is False
.
Source code in penvm/src/server/penvm/server/session.py
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set_kernel(kernel)
Set the kernel to use.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
kernel |
Kernel
|
Kernel. |
required |
Source code in penvm/src/server/penvm/server/session.py
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start()
Start the main session thread.
Source code in penvm/src/server/penvm/server/session.py
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state()
Get object state.
Returns:
Type | Description |
---|---|
State
|
|
Source code in penvm/src/server/penvm/server/session.py
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stop()
Stop the run
method running in a thread.
Source code in penvm/src/server/penvm/server/session.py
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penvm.server.sessionmanager
All sessions are managed by SessionManager
. Creation, removal,
cleanup, and lookups are centrally handled by the SessionManager
.
SessionManager
Bases: BaseObject
Manages server-side sessions.
All sessions are managed by a SessionManager owned by the machine.
Source code in penvm/src/server/penvm/server/sessionmanager.py
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__init__(machine)
Initialize.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
machine |
Machine
|
Owning machine. |
required |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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cleanup(sessionid)
Clean up session (if "empty").
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
str
|
Session id. |
required |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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delete(sessionid)
Delete (forced) a session by session id.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
str
|
Session id. |
required |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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get(sessionid)
Get a session by session id.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
str
|
Session id. |
required |
Returns:
Type | Description |
---|---|
Session
|
Session. |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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list()
List sessions by session id.
Returns:
Type | Description |
---|---|
List[str]
|
Session ids. |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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pop(sessionid)
Pop a session by session id.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
str
|
Session id. |
required |
Returns:
Type | Description |
---|---|
Session
|
Session. |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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setdefault(sessionid, default=None)
Get a session (or create new one if not present) by session id.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
sessionid |
Union[str, None]
|
Session id. |
required |
default |
Union[Session, None]
|
Session if session not found. |
None
|
Returns:
Type | Description |
---|---|
Session
|
Session. |
Source code in penvm/src/server/penvm/server/sessionmanager.py
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start()
Start.
NOOP. No background threads.
Source code in penvm/src/server/penvm/server/sessionmanager.py
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state()
Get object state.
Returns:
Type | Description |
---|---|
State
|
|
Source code in penvm/src/server/penvm/server/sessionmanager.py
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penvm.server.storage
StorageManager
Bases: BaseObject
Storage manager.
NIY.
Source code in penvm/src/server/penvm/server/storage.py
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__init__(machine)
Initialize.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
machine |
Machine
|
Owning machine. |
required |
Source code in penvm/src/server/penvm/server/storage.py
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delete(storeid)
Delete by id.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
storeid |
str
|
Store id. |
required |
Source code in penvm/src/server/penvm/server/storage.py
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get(storeid)
Get object by id.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
storeid |
str
|
Store id. |
required |
Returns:
Type | Description |
---|---|
Any
|
Store. |
Source code in penvm/src/server/penvm/server/storage.py
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list()
List store ids.
Returns:
Type | Description |
---|---|
List[str]
|
Store ids. |
Source code in penvm/src/server/penvm/server/storage.py
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|