Any progress on the time-based history implementation? It seems like some
years have passed since this discussion started and I wonder what are the
recommended ways on achieving this with OrientDB?
Am Donnerstag, 23. Mai 2013 03:44:00 UTC+7 schrieb Lvc@:
>
> Hi Shaohua,
> this isn't supported out of the box, but I don't know if any user did it.
>
> Lvc@
>
>
> On 22 May 2013 19:07, Shaohua Ma <mas...@gmail.com <javascript:>> wrote:
>
>> Hi,
>>
>> I am new to the OrientDB. But the history concept is really cool. Is it
>> working yet? thanks.
>>
>> Shaohua
>>
>>
>> On Wednesday, July 11, 2012 3:16:11 AM UTC-7, Thomas wrote:
>>>
>>> Hi,
>>>
>>> Using orientdb-graphed-1.0.1-SNAPSHOT I'm trying to create a history
>>> solution using Hooks.
>>>
>>> From inside the hooks (ONLY onRecordBeforeUpdate and
>>> onRecordBeforeDelete) I want to do the
>>> following which work except for the final save operation :-(
>>>
>>> 1. Copy a document that is about to be saved or deleted. The copy will
>>> be used to create a history document.
>>> 2. Get all dirty fields from the document that is about to be updated
>>> and then
>>> 3. Copy the original values from the ODocument (if any exist) and
>>> finally
>>> 4. save the document to a History cluster.
>>>
>>> @Override
>>> public boolean onRecordBeforeUpdate(ORecord<?> iRecord) {
>>> if( iRecord instanceof ODocument ){
>>> ODocument doc = (ODocument) iRecord;
>>> if(validateClusterId(doc)) {
>>> ODocument copy = doc.copy(); // Contains dirty fields
>>> that we need to update with the old values before we can save the document
>>> to History.
>>> String[] dirtyFields = doc.getDirtyFields();
>>> for(int i=0;i<dirtyFields.length;i++){
>>> if(doc.getOriginalValue(dirtyFields[i]) == null)
>>> System.out.println("Field [ " + dirtyFields[i] + " ] did not exist in
>>> previous version");
>>> else {
>>> System.out.println("Original Value of dirty
>>> field [ " + dirtyFields[i] +
>>> " ] will be copied to History version.
>>> Original value to be copied to the History version is [ " +
>>> doc.getOriginalValue(dirtyFields[i]) +
>>> " ] New value is [ " + doc.field(dirtyFields[i]) + " ]");
>>> copy.field(dirtyFields[i], doc.getOriginalValue(
>>> dirtyFields[i]));
>>> }
>>> }
>>> copy.save("History");
>>> }
>>> }
>>> return true;
>>> }
>>>
>>>
>>> The problem is the final save operation which give the following
>>> exception:
>>>
>>> com.orientechnologies.orient.core.exception.
>>> OConcurrentModificationException:
>>> Cannot update record #8:0 in storage 'orientdb' because the version is
>>> not the latest.
>>> Probably you are updating an old record or it has been modified by
>>> another user (db=v1 your=v0)
>>>
>>> I have also tried to use doc.getDatabase() and then create a new Vertex
>>> or Edge, but this is not possible.
>>>
>>>
>>> Any suggestions on how to save from inside the Hook?
>>>
>>>
>>> Thanks
>>>
>>>
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>
>
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