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"""Synchronization manager module."""
import
logging
import
time
from
threading
import
Thread
from
queue
import
Queue
from
splitio
.
optional
.
loaders
import
asyncio
from
splitio
.
push
.
manager
import
PushManager
,
PushManagerAsync
,
Status
from
splitio
.
api
import
APIException
from
splitio
.
util
.
backoff
import
Backoff
from
splitio
.
util
.
time
import
get_current_epoch_time_ms
from
splitio
.
models
.
telemetry
import
SSESyncMode
,
StreamingEventTypes
from
splitio
.
sync
.
synchronizer
import
_SYNC_ALL_NO_RETRIES
_LOGGER
=
logging
.
getLogger
(
__name__
)
class
Manager
(
object
):
# pylint:disable=too-many-instance-attributes
"""Manager Class."""
_CENTINEL_EVENT
=
object
()
def
__init__
(
self
,
ready_flag
,
synchronizer
,
auth_api
,
streaming_enabled
,
sdk_metadata
,
telemetry_runtime_producer
,
sse_url
=
None
,
client_key
=
None
):
# pylint:disable=too-many-arguments
"""
Construct Manager.
:param ready_flag: Flag to set when splits initial sync is complete.
:type ready_flag: threading.Event
:param split_synchronizers: synchronizers for performing start/stop logic
:type split_synchronizers: splitio.sync.synchronizer.Synchronizer
:param auth_api: Authentication api client
:type auth_api: splitio.api.auth.AuthAPI
:param sdk_metadata: SDK version & machine name & IP.
:type sdk_metadata: splitio.client.util.SdkMetadata
:param streaming_enabled: whether to use streaming or not
:type streaming_enabled: bool
:param sse_url: streaming base url.
:type sse_url: str
:param client_key: client key.
:type client_key: str
"""
self
.
_streaming_enabled
=
streaming_enabled
self
.
_ready_flag
=
ready_flag
self
.
_synchronizer
=
synchronizer
self
.
_telemetry_runtime_producer
=
telemetry_runtime_producer
if
self
.
_streaming_enabled
:
self
.
_push_status_handler_active
=
True
self
.
_backoff
=
Backoff
()
self
.
_queue
=
Queue
()
self
.
_push
=
PushManager
(
auth_api
,
synchronizer
,
self
.
_queue
,
sdk_metadata
,
telemetry_runtime_producer
,
sse_url
,
client_key
)
self
.
_push_status_handler
=
Thread
(
target
=
self
.
_streaming_feedback_handler
,
name
=
'PushStatusHandler'
,
daemon
=
True
)
def
recreate
(
self
):
"""Recreate poolers for forked processes."""
self
.
_synchronizer
.
_split_synchronizers
.
_segment_sync
.
recreate
()
def
start
(
self
,
max_retry_attempts
=
_SYNC_ALL_NO_RETRIES
):
"""Start the SDK synchronization tasks."""
try
:
self
.
_synchronizer
.
sync_all
(
max_retry_attempts
)
self
.
_ready_flag
.
set
()
self
.
_synchronizer
.
start_periodic_data_recording
()
if
self
.
_streaming_enabled
:
self
.
_push_status_handler
.
start
()
self
.
_push
.
start
()
else
:
self
.
_synchronizer
.
start_periodic_fetching
()
except
(
APIException
,
RuntimeError
):
_LOGGER
.
error
(
'Exception raised starting Split Manager'
)
_LOGGER
.
debug
(
'Exception information: '
,
exc_info
=
True
)
raise
def
stop
(
self
,
blocking
):
"""
Stop manager logic.
:param blocking: flag to wait until tasks are stopped
:type blocking: bool
"""
_LOGGER
.
info
(
'Stopping manager tasks'
)
if
self
.
_streaming_enabled
:
self
.
_push_status_handler_active
=
False
self
.
_queue
.
put
(
self
.
_CENTINEL_EVENT
)
self
.
_push
.
stop
()
self
.
_synchronizer
.
shutdown
(
blocking
)
def
_streaming_feedback_handler
(
self
):
"""
Handle status updates from the streaming subsystem.
:param status: current status of the streaming pipeline.
:type status: splitio.push.status_stracker.Status
"""
while
self
.
_push_status_handler_active
:
status
=
self
.
_queue
.
get
()
if
status
==
self
.
_CENTINEL_EVENT
:
continue
if
status
==
Status
.
PUSH_SUBSYSTEM_UP
:
self
.
_synchronizer
.
stop_periodic_fetching
()
self
.
_synchronizer
.
sync_all
()
self
.
_push
.
update_workers_status
(
True
)
self
.
_backoff
.
reset
()
_LOGGER
.
info
(
'streaming up and running. disabling periodic fetching.'
)
self
.
_telemetry_runtime_producer
.
record_streaming_event
((
StreamingEventTypes
.
SYNC_MODE_UPDATE
,
SSESyncMode
.
STREAMING
.
value
,
get_current_epoch_time_ms
()))
elif
status
==
Status
.
PUSH_SUBSYSTEM_DOWN
:
self
.
_push
.
update_workers_status
(
False
)
self
.
_synchronizer
.
sync_all
()
self
.
_synchronizer
.
start_periodic_fetching
()
_LOGGER
.
info
(
'streaming temporarily down. starting periodic fetching'
)
self
.
_telemetry_runtime_producer
.
record_streaming_event
((
StreamingEventTypes
.
SYNC_MODE_UPDATE
,
SSESyncMode
.
POLLING
.
value
,
get_current_epoch_time_ms
()))
elif
status
==
Status
.
PUSH_RETRYABLE_ERROR
:
self
.
_push
.
update_workers_status
(
False
)
self
.
_push
.
stop
(
True
)
self
.
_synchronizer
.
sync_all
()
self
.
_synchronizer
.
start_periodic_fetching
()
how_long
=
self
.
_backoff
.
get
()
_LOGGER
.
info
(
'error in streaming. restarting flow in %d seconds'
,
how_long
)
time
.
sleep
(
how_long
)
self
.
_push
.
start
()
elif
status
==
Status
.
PUSH_NONRETRYABLE_ERROR
:
self
.
_push
.
update_workers_status
(
False
)
self
.
_push
.
stop
(
False
)
self
.
_synchronizer
.
sync_all
()
self
.
_synchronizer
.
start_periodic_fetching
()
_LOGGER
.
info
(
'non-recoverable error in streaming. switching to polling.'
)
self
.
_telemetry_runtime_producer
.
record_streaming_event
((
StreamingEventTypes
.
SYNC_MODE_UPDATE
,
SSESyncMode
.
POLLING
.
value
,
get_current_epoch_time_ms
()))
return
class
ManagerAsync
(
object
):
# pylint:disable=too-many-instance-attributes
"""Manager Class."""
_CENTINEL_EVENT
=
object
()
def
__init__
(
self
,
synchronizer
,
auth_api
,
streaming_enabled
,
sdk_metadata
,
telemetry_runtime_producer
,
sse_url
=
None
,
client_key
=
None
):
# pylint:disable=too-many-arguments
"""
Construct Manager.
:param split_synchronizers: synchronizers for performing start/stop logic
:type split_synchronizers: splitio.sync.synchronizer.Synchronizer
:param auth_api: Authentication api client
:type auth_api: splitio.api.auth.AuthAPI
:param sdk_metadata: SDK version & machine name & IP.
:type sdk_metadata: splitio.client.util.SdkMetadata
:param streaming_enabled: whether to use streaming or not
:type streaming_enabled: bool
:param sse_url: streaming base url.
:type sse_url: str
:param client_key: client key.
:type client_key: str
"""
self
.
_streaming_enabled
=
streaming_enabled
self
.
_synchronizer
=
synchronizer
self
.
_telemetry_runtime_producer
=
telemetry_runtime_producer
if
self
.
_streaming_enabled
:
self
.
_push_status_handler_active
=
True
self
.
_backoff
=
Backoff
()
self
.
_queue
=
asyncio
.
Queue
()
self
.
_push
=
PushManagerAsync
(
auth_api
,
synchronizer
,
self
.
_queue
,
sdk_metadata
,
telemetry_runtime_producer
,
sse_url
,
client_key
)
self
.
_stopped
=
False
async
def
start
(
self
,
max_retry_attempts
=
_SYNC_ALL_NO_RETRIES
):
"""Start the SDK synchronization tasks."""
self
.
_stopped
=
False
try
:
await
self
.
_synchronizer
.
sync_all
(
max_retry_attempts
)
if
not
self
.
_stopped
:
self
.
_synchronizer
.
start_periodic_data_recording
()
if
self
.
_streaming_enabled
:
asyncio
.
get_running_loop
().
create_task
(
self
.
_streaming_feedback_handler
())
self
.
_push
.
start
()
else
:
self
.
_synchronizer
.
start_periodic_fetching
()
except
(
APIException
,
RuntimeError
):
_LOGGER
.
error
(
'Exception raised starting Split Manager'
)
_LOGGER
.
debug
(
'Exception information: '
,
exc_info
=
True
)
raise
async
def
stop
(
self
,
blocking
):
"""
Stop manager logic.
:param blocking: flag to wait until tasks are stopped
:type blocking: bool
"""
_LOGGER
.
info
(
'Stopping manager tasks'
)
if
self
.
_streaming_enabled
:
self
.
_push_status_handler_active
=
False
await
self
.
_queue
.
put
(
self
.
_CENTINEL_EVENT
)
await
self
.
_push
.
stop
(
blocking
)
await
self
.
_push
.
close_sse_http_client
()
await
self
.
_synchronizer
.
shutdown
(
blocking
)
self
.
_stopped
=
True
async
def
_streaming_feedback_handler
(
self
):
"""
Handle status updates from the streaming subsystem.
:param status: current status of the streaming pipeline.
:type status: splitio.push.status_stracker.Status
"""
while
self
.
_push_status_handler_active
:
status
=
await
self
.
_queue
.
get
()
if
status
==
self
.
_CENTINEL_EVENT
:
continue
if
status
==
Status
.
PUSH_SUBSYSTEM_UP
:
await
self
.
_synchronizer
.
stop_periodic_fetching
()
await
self
.
_synchronizer
.
sync_all
()
await
self
.
_push
.
update_workers_status
(
True
)
self
.
_backoff
.
reset
()
_LOGGER
.
info
(
'streaming up and running. disabling periodic fetching.'
)
await
self
.
_telemetry_runtime_producer
.
record_streaming_event
((
StreamingEventTypes
.
SYNC_MODE_UPDATE
,
SSESyncMode
.
STREAMING
.
value
,
get_current_epoch_time_ms
()))
elif
status
==
Status
.
PUSH_SUBSYSTEM_DOWN
:
await
self
.
_push
.
update_workers_status
(
False
)
await
self
.
_synchronizer
.
sync_all
()
self
.
_synchronizer
.
start_periodic_fetching
()
_LOGGER
.
info
(
'streaming temporarily down. starting periodic fetching'
)
await
self
.
_telemetry_runtime_producer
.
record_streaming_event
((
StreamingEventTypes
.
SYNC_MODE_UPDATE
,
SSESyncMode
.
POLLING
.
value
,
get_current_epoch_time_ms
()))
elif
status
==
Status
.
PUSH_RETRYABLE_ERROR
:
await
self
.
_push
.
update_workers_status
(
False
)
await
self
.
_push
.
stop
(
True
)
await
self
.
_synchronizer
.
sync_all
()
self
.
_synchronizer
.
start_periodic_fetching
()
how_long
=
self
.
_backoff
.
get
()
_LOGGER
.
info
(
'error in streaming. restarting flow in %d seconds'
,
how_long
)
await
asyncio
.
sleep
(
how_long
)
self
.
_push
.
start
()
elif
status
==
Status
.
PUSH_NONRETRYABLE_ERROR
:
await
self
.
_push
.
update_workers_status
(
False
)
await
self
.
_push
.
stop
(
False
)
await
self
.
_synchronizer
.
sync_all
()
self
.
_synchronizer
.
start_periodic_fetching
()
_LOGGER
.
info
(
'non-recoverable error in streaming. switching to polling.'
)
await
self
.
_telemetry_runtime_producer
.
record_streaming_event
((
StreamingEventTypes
.
SYNC_MODE_UPDATE
,
SSESyncMode
.
POLLING
.
value
,
get_current_epoch_time_ms
()))
return
class
RedisManagerBase
(
object
):
# pylint:disable=too-many-instance-attributes
"""Manager base Class."""
def
__init__
(
self
,
synchronizer
):
# pylint:disable=too-many-arguments
"""
Construct Manager.
:param synchronizer: synchronizers for performing start/stop logic
:type synchronizer: splitio.sync.synchronizer.Synchronizer
"""
self
.
_ready_flag
=
True
self
.
_synchronizer
=
synchronizer
def
recreate
(
self
):
"""Not implemented"""
return
def
start
(
self
):
"""Start the SDK synchronization tasks."""
try
:
self
.
_synchronizer
.
start_periodic_data_recording
()
except
(
APIException
,
RuntimeError
):
_LOGGER
.
error
(
'Exception raised starting Split Manager'
)
_LOGGER
.
debug
(
'Exception information: '
,
exc_info
=
True
)
raise
class
RedisManager
(
RedisManagerBase
):
# pylint:disable=too-many-instance-attributes
"""Manager Class."""
def
__init__
(
self
,
synchronizer
):
# pylint:disable=too-many-arguments
"""
Construct Manager.
:param synchronizer: synchronizers for performing start/stop logic
:type synchronizer: splitio.sync.synchronizer.Synchronizer
"""
RedisManagerBase
.
__init__
(
self
,
synchronizer
)
def
stop
(
self
,
blocking
):
"""
Stop manager logic.
:param blocking: flag to wait until tasks are stopped
:type blocking: bool
"""
_LOGGER
.
info
(
'Stopping manager tasks'
)
self
.
_synchronizer
.
shutdown
(
blocking
)
class
RedisManagerAsync
(
RedisManagerBase
):
# pylint:disable=too-many-instance-attributes
"""Manager async Class."""
def
__init__
(
self
,
synchronizer
):
# pylint:disable=too-many-arguments
"""
Construct Manager.
:param synchronizer: synchronizers for performing start/stop logic
:type synchronizer: splitio.sync.synchronizer.Synchronizer
"""
RedisManagerBase
.
__init__
(
self
,
synchronizer
)
async
def
stop
(
self
,
blocking
):
"""
Stop manager logic.
:param blocking: flag to wait until tasks are stopped
:type blocking: bool
"""
_LOGGER
.
info
(
'Stopping manager tasks'
)
await
self
.
_synchronizer
.
shutdown
(
blocking
)
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