osaf/services/saf/immsv/README | 24 +++++++++++++++++++++---
osaf/services/saf/immsv/immnd/ImmModel.cc | 2 +-
2 files changed, 22 insertions(+), 4 deletions(-)
This enhancement removes the restriction of not allowing a class schema change
to add a default to an attribute definition. (Note: Removing a default is still
not allowed as it is inherrently not backwards compatible.)
Only new instances of the class will get the default assigned when no value is
provided for the attribute at object-create time.
Old instances with a null-value for the attribute will still have a null-value
for that attribute even after the schema change. A general rule for schema
changes is that the immsv never alters the value of existing attributes as
part of a schema change. Doing so would require the OI to be notified, which is
not realistic since the shcema change is not performed as a CCB.
This feature is only functional after an upgrade to 4.5 has completed.
diff --git a/osaf/services/saf/immsv/README b/osaf/services/saf/immsv/README
--- a/osaf/services/saf/immsv/README
+++ b/osaf/services/saf/immsv/README
@@ -484,6 +484,10 @@ CHANGE of an existing attribute if it is
New instances of the class will get the new default,
old instances retain the old value.
+ * Adding default-value for an attribute (config or runtime).
+ New instances of the class will get the new default,
+ old instances retain the null value.
+
* Adding 'multivalued' flag for an attribute (config or runtime).
* Adding 'writable' flag for an attribute (config).
@@ -494,7 +498,7 @@ CHANGE of an existing attribute if it is
All other changes, such as change of attribute type, removal of default,
-addition of default, etc are not allowed.
+etc are not allowed.
There is no API change. The existing saImmOmClassCreate_2 call is used
to insert the new class version. The standard behavior is to reject
@@ -1842,7 +1846,6 @@ not to create deadlock cycles between th
be resolved by the timeout of the synchronous admin-ops, so the problem would
be lack
of progress on some task, not a permanently hung set of processes.
-
Attribute 'longDnsAllowed' added to class 'OpensafImm' (4.5)
===========================================================
https://sourceforge.net/p/opensaf/tickets/897
@@ -1869,10 +1872,25 @@ The xml file should be used for upgradin
upgraded to OpenSAF 4.5 and that system must be capable of supporting long DNs.
+Allow schema change to add attribute default (4.5)
+==================================================
+https://sourceforge.net/p/opensaf/tickets/895
+
+The restriction of not allowing a default value to be added to an attribute
that
+previously had no default, has been removed. Only new instances of the class
will
+get the default assigned when no value is provided for the attribute at
object-create
+time. Old instances with a null-value for the attribute will still have a
null-value
+for that attribute even after the schema change. A general rule for schema
changes
+is that the immsv never alters the value of existing attributes as part of a
schema
+change. Doing so would require the OI to be notified, which is not realistic
since
+the shcema change is not performed as a CCB.
+This new feature is only available after an upgrade to OpensAF 4.5 has
completed.
+
+
Notes on upgrading from OpenSAF 4.[1,2,3,4] to OpenSAF 4.5
==========================================================
Several enhancements in OpenSAF4.5 add new message types or add new imm server
states
-for ccb handling (#798, #799, #16). During a rolling upgrade from an earlier
OpenSAF
+for ccb handling (#798, #799, #16, #895). During a rolling upgrade from an
earlier OpenSAF
release to the 4.5 release there will be nodes executing the older release
concurrently
with nodes executing OpenSAF 4.5. Nodes executing the earlier release will not
recognize new message types originating from nodes executing 4.5 and messages
from
diff --git a/osaf/services/saf/immsv/immnd/ImmModel.cc
b/osaf/services/saf/immsv/immnd/ImmModel.cc
--- a/osaf/services/saf/immsv/immnd/ImmModel.cc
+++ b/osaf/services/saf/immsv/immnd/ImmModel.cc
@@ -3727,7 +3727,7 @@ ImmModel::notCompatibleAtt(const std::st
}
}
- if(oldAttr->mDefaultValue.empty() && !newAttr->mDefaultValue.empty()) {
+ if(oldAttr->mDefaultValue.empty() && !newAttr->mDefaultValue.empty()
&& !protocol45Allowed()) {
LOG_NO("Impossible upgrade, attribute %s:%s adds default value",
className.c_str(), attName.c_str());
return true;
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