IRIS for UNIX 2019.2
DEFAULTCONCURRENCY is the default value for the concurrency formal argument defined for %Open, %OpenId, %Delete and %DeleteId methods. It is not the default value of the %Concurrency property of persistent classes. If the value of the actual concurrency argument passed to any of the above methods is -1 then the formal argument value will be set to the value of the DEFAULTCONCURRENCY parameter value defined for the class.
If OBJJOURNAL is true then the value of the JOURNALSTREAM parameter defines whether or not streams will be journaled. If JOURNALSTREAM is false (0) then no streams will be journaled. If JOURNALSTREAM is true (1) then streams will be journaled and if Object Synchronization tools are used to produce SyncSets (%SYNC.SyncSet) then journaled streams will be added to the sync set when the referencing object is added.
if OBJJOURNAL is TRUE then inserts, updates and deletes will be logged in ^OBJ.JournalT if OBJJOURNAL = 2 then the entire object will also be journaled in ^OBJ.Journal
%AddToSyncSet() adds an object to a sync set.
Deletes the stored version of the object with OID oid from the database. It does not remove any in-memory versions of the object that may be present. Refer to Object Concurrency Options for more details on the optional concurrency argument. If no value for the concurrency argument is passed or the value passed is -1 then it will be assigned the value of the DEFAULTCONCURRENCY parameter as defined for the class.
%Statusvalue indicating success or failure.
Deletes the stored version of the object with ID id from the database.
%DeleteIdis identical in operation to the %Deletemethod except that it uses and Id value instead of an OID value to find an object. Refer to Object Concurrency Options for more details on the optional concurrency argument. If no value for the concurrency argument is passed or the value passed is -1 then it will be assigned the value of the DEFAULTCONCURRENCY parameter as defined for the class.
%IsNull() returns true if the current object is NULL. A NULL object is one whose serialized value is NULL. This instance method predicts whether or not the serialization of the current object will be NULL and returns TRUE (1) if the serialization will be null. Persistent objects can not ever be NULL since at least the %ID is not null. Streams can return a non-NULL serialization but the stream is determined to be NULL if it has not ever been written to. This method is expected to be overridden by more specific subclasses.
Return true if pOID is a null object and false if the object is not null
Should be overridden in classes using filtering for synchronization
This callback method is invoked by the
%Openmethod to determine the classname of the object specified by oid.
This method should be implemented by the user. This method is invoked by %SYNC.SyncSet.Import when the object being imported has been modified on the local system since the last time it was synchronized with the system which produced the SyncSet. Passed to this method are the oid of the conflicting object, and oref to the SyncSet containing the version to sync to, and the pointer to this object in the SyncSet. It is the responsibility of this method to either resolve the conflict and process the resolved object or to return a failure status to the caller. The resolved object can be processed by saving, invoking the %SyncObjectIn method or by whatever means the class author deems appropriate. If a failure status is returned to %SYNC.SyncSet.Import then the object will be requeued in the SyncSet. That might result in another call at a later time to this method.
This method synchronizes an entry from a %SYNC.SyncSet with the local database. The method is generated and should not be overridden by the user and there are no callbacks from this method. The return value of this method is a %Status value that indicates success or failure. Inputs to this method include an oref to a %SYNC.SyncSet object, a pointer to the entry in the SyncSet and the type of modification represented by the SyncSet entry. Modifications are of three types - insert a new object, update to an existing object, and delete an existing object. A parameter passed by reference allows the caller to receive an oref to the affected object in the local database.
An entry in a SyncSet corresponds to one object in the local database. It contains values for properties of the object and represents some modification to an object made in another database called the 'source' database. To synchronize the modifications made to the object in the source database it is necessary to repeat those modifications in the local database. The first task is to resolve the GUID that identifies the modified object with the local database. If the object exists in the local database and the type of modification, fileop, is a delete then the object is deleted from the local database and the status is returned to the caller. If the object does not exists in the local database and the modification is a delete then nothing is done and a success status is returned to the caller. For other modification types, inserts and updates, the object is opened if it exists or a new object created if it does not exist. It is to this object that modifications contained in the SyncSet are applied by copying each value from the SyncSet entry to the corresponding property. Property values are either literals or objects. If the value is a literal it is simply copied into the object. If the property is an object then the value is either a GUID or a link to an object that exists in the SyncSet. Object links are used to resolve references to other object values that have not yet been synchronized to the local database. If the value is a GUID then the value is resolved by resolving the GUID to an OID using the local database's GUID tables. If the GUID cannot be resolved then a new SyncSet entry is added to the end of the SyncSet and the pointer to that SyncSet entry is used to link the current SyncSet entry to the newly created SyncSet entry. If the property whose value cannot be resolved is a required property then the new SyncSet entry is a complete copy of the current entry, otherwise it is simply a partial entry containing the unresolvable values. For serial objects, there is no 'partial' sync so any failure to resolve a GUID or linked object must be treated the same as a required property.
Once all values from the SyncSet entry have been processed by either synchronizing them with the local object or deferring resolution through link creation an oref to the local object is returned to the caller. If the local object is an instance of a %Persistent class then it is also saved. Any failure reported by %Save is reported to the caller.
%SyncTransport uses a JITGenerated routine to extract an object from the transporter into the current database.