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Kirill Smelkov
ZODB
Commits
8cc1fcea
Commit
8cc1fcea
authored
Jun 21, 2004
by
Tim Peters
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Regen storage doc.
parent
3d4705cb
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...
...
@@ -96,7 +96,7 @@ the following methods:
\begin{methoddesc}
{
tpc
_
begin
}{
transaction
\optional
{
, tid
\optional
{
,
status
}}}
Begin the two-phase commit for
\var
{
transaction
}
.
Begin the two-phase commit for
\var
{
transaction
}
.
This method blocks until the storage is in the not committing state,
and then places the storage in the committing state. If the storage
...
...
@@ -117,7 +117,7 @@ the following methods:
\var
{
oid
}
. A Storage need not and often will not write data
immediately. If data are written, then the storage should be
prepared to undo the write if a transaction is aborted.
The value of
\var
{
serial
}
is opaque; it should be the value returned
by the
\method
{
load()
}
call that read the object.
\var
{
version
}
is
a string that identifies the version or the empty string.
...
...
@@ -125,7 +125,7 @@ the following methods:
\class
{
ZODB.Transaction.Transaction
}
, is the current transaction.
The current transaction is the transaction passed to the most recent
\method
{
tpc
_
begin()
}
call.
There are several possible return values, depending in part on
whether the storage writes the data immediately. The return value
will be one of:
...
...
@@ -143,13 +143,13 @@ the following methods:
sequence of pairs from the exception? Barry, Jeremy, please
clarify here.
}
\end{itemize}
Several different exceptions can be raised when an error occurs.
\begin{itemize}
\item
\exception
{
ConflictError
}
is raised when
\var
{
serial
}
does not match the most recent serial number for object
\var
{
oid
}
.
\var
{
oid
}
.
\item
\exception
{
VersionLockError
}
is raised when object
\var
{
oid
}
is locked in a version and the
\var
{
version
}
...
...
@@ -157,7 +157,7 @@ the following methods:
\item
\exception
{
StorageTransactionError
}
is raised when
\var
{
transaction
}
does not match the current transaction.
\item
\exception
{
StorageError
}
or, more often, a subclass of
it, is raised when an internal error occurs while the
storage is handling the
\method
{
store()
}
call.
...
...
@@ -197,7 +197,7 @@ the following methods:
If
\var
{
transaction
}
is not the current transaction, nothing
happens.
\var
{
func
}
is called with no arguments while the storage lock is
held, but possibly before the updated date is made durable. This
argument exists to support the
\class
{
Connection
}
object's
...
...
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