There, I fixed it!It's not random, I looked through Alfresco sources and the actual transformation needs to be done in it's own transaction. I don't know why it needs it and the exception we get is not very hintful -but here's a working example:
ContentService contentService = serviceRegistry.getContentService();
NodeService nodeService = serviceRegistry.getNodeService();
MimetypeService mimetypeService = serviceRegistry.getMimetypeService();
String newName = transformName(mimetypeService, document.getName(), targetMimeType, true);
NodeRef parentNodeRef = (nodeService.getPrimaryParent(sourceNodeRef)).getParentRef();
NodeRef targetNodeRef = serviceRegistry.getCopyService().copy(
sourceNodeRef,
parentNodeRef,
ContentModel.ASSOC_CONTAINS,
QName.createQName(NamespaceService.CONTENT_MODEL_1_0_URI, "copy"),
false);
nodeService.setProperty(targetNodeRef, ContentModel.PROP_NAME, newName);
ContentReader reader = contentService.getReader(sourceNodeRef, ContentModel.PROP_CONTENT);
String sourceMimeType = reader.getMimetype();
if (null == reader || !reader.exists()) {
throw new ContentException("Could not aqcuire reader");
}
ContentWriter writer = contentService.getWriter(targetNodeRef, ContentModel.PROP_CONTENT, true);
writer.setMimetype(targetMimeType);
writer.setEncoding(reader.getEncoding());
if (null != contentService.getTransformer(sourceMimeType, targetMimeType)) {
serviceRegistry.getTransactionService().getRetryingTransactionHelper().doInTransaction(doTransformationCallback(sourceNodeRef, targetNodeRef, reader, writer), false, true);
}
}
protected RetryingTransactionHelper.RetryingTransactionCallback doTransformationCallback(final NodeRef sourceNodeRef, final NodeRef targetNodeRef, final ContentReader reader, final ContentWriter writer) {
return new RetryingTransactionHelper.RetryingTransactionCallback() {
@Override
public Object execute() throws Throwable {
TransformationOptions options = new TransformationOptions(
sourceNodeRef, ContentModel.PROP_NAME, targetNodeRef, ContentModel.PROP_NAME);
serviceRegistry.getContentService().transform(reader,writer,options);
return null;
}
};
}
