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Revert "Add experimental support for sharding event persister. (#8170)" (#8242)

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* Revert "Add experimental support for sharding event persister. (#8170)"

This reverts commit 82c1ee1c22.

* Changelog
This commit is contained in:
Brendan Abolivier 2020-09-04 10:19:42 +01:00 • committed by GitHub
parent be16ee59a8
commit 9f8abdcc38
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19 changed files with 78 additions and 206 deletions
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21
synapse/config/_base.py
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@ -832,26 +832,11 @@ class ShardedWorkerHandlingConfig:
def should_handle(self, instance_name: str, key: str) -> bool:
"""Whether this instance is responsible for handling the given key.
"""
# If multiple instances are not defined we always return true
# If multiple instances are not defined we always return true.
if not self.instances or len(self.instances) == 1:
return True
return self.get_instance(key) == instance_name
def get_instance(self, key: str) -> str:
"""Get the instance responsible for handling the given key.
Note: For things like federation sending the config for which instance
is sending is known only to the sender instance if there is only one.
Therefore `should_handle` should be used where possible.
"""
if not self.instances:
return "master"
if len(self.instances) == 1:
return self.instances[0]
# We shard by taking the hash, modulo it by the number of instances and
# then checking whether this instance matches the instance at that
# index.
@ -861,7 +846,7 @@ class ShardedWorkerHandlingConfig:
dest_hash = sha256(key.encode("utf8")).digest()
dest_int = int.from_bytes(dest_hash, byteorder="little")
remainder = dest_int % (len(self.instances))
return self.instances[remainder]
return self.instances[remainder] == instance_name
__all__ = ["Config", "RootConfig", "ShardedWorkerHandlingConfig"]