Commit 75114360 authored by Jim Fulton's avatar Jim Fulton

Added a collaboration for a new savepoint model.

Updated an old collaboration to reflect the change.
parent 4fc06850
...@@ -28,7 +28,7 @@ Scenario ...@@ -28,7 +28,7 @@ Scenario
# in the changed state. # in the changed state.
T.commit() T.commit()
C.beforeCompletion(T) C.beforeCompletion(T)
C.tpc_begin(T, False) C.tpc_begin(T)
S.tpc_begin(T) S.tpc_begin(T)
C.commit(T) C.commit(T)
S.store(1, ..., T) S.store(1, ..., T)
...@@ -89,3 +89,84 @@ Scenario ...@@ -89,3 +89,84 @@ Scenario
C._flush_invalidations() C._flush_invalidations()
# Processes invalidations that may have come in from other # Processes invalidations that may have come in from other
# transactions. # transactions.
Participants:
T: ITransaction
o1, o2, o3: some persistent objects
C1, C2, C3: resource managers
S1, S2: Transaction savepoint objects
s11, s21, s22: resource-manager savepoints
Scenario
"""Rollback of a savepoint"""
create T
o1.modify()
C1.regisiter(o1)
T.join(C1)
T.savepoint()
C1.savepoint()
return s11
return S1 = Savepoint(T, [r11])
o1.modify()
C1.regisiter(o1)
o2.modify()
C2.regisiter(o2)
T.join(C2)
T.savepoint()
C1.savepoint()
return s21
C2.savepoint()
return s22
return S2 = Savepoint(T, [r21, r22])
o3.modify()
C3.regisiter(o3)
T.join(C3)
S1.rollback()
S2.rollback()
T.discard()
C1.discard()
C2.discard()
C3.discard()
o3.invalidate()
S2.discard()
s21.discard() # roll back changes since previous, which is r11
C1.discard(s21)
o1.invalidate()
# truncates temporary storage to s21's position
s22.discard() # roll back changes since previous, which is r11
C1.discard(s22)
o2.invalidate()
# truncates temporary storage to beginning, because
# s22 was the first savepoint. (Perhaps conection
# savepoints record the log position before the
# data were written, which is 0 in this case.
T.commit()
C1.beforeCompletion(T)
C2.beforeCompletion(T)
C3.beforeCompletion(T)
C1.tpc_begin(T)
S1.tpc_begin(T)
C2.tpc_begin(T)
C3.tpc_begin(T)
C1.commit(T)
S1.store(1, ..., T)
C2.commit(T)
C3.commit(T)
C1.tpc_vote(T)
S1.tpc_vote(T)
C2.tpc_vote(T)
C3.tpc_vote(T)
C1.tpc_finish(T)
S1.tpc_finish(T, f) # f is a callback function, which arranges
c# to call DB.invalidate (next)
DB.invalidate(tid, {1: 1}, C)
TM.free(T)
C1.afterCompletion(T)
C1._flush_invalidations()
C2.afterCompletion(T)
C2._flush_invalidations()
C3.afterCompletion(T)
C3._flush_invalidations()
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment