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"""
Rhizi kernel, home to core operation login
"""
import json
import logging
import traceback
from db_op import DBO_diff_commit__attr, DBO_block_chain__commit, DBO_rzdoc__create, \
DBO_rzdoc__lookup_by_name, DBO_rzdoc__clone, DBO_rzdoc__delete, DBO_rzdoc__list,\
DBO_block_chain__init
from db_op import DBO_diff_commit__topo
from model.graph import Topo_Diff
from model.model import RZDoc
import neo4j_util
from neo4j_qt import QT_RZDOC_NS_Filter, QT_RZDOC_Meta_NS_Filter
log = logging.getLogger('rhizi')
class RZDoc_Exception__not_found(Exception):
def __init__(self, rzdoc_name):
super(RZDoc_Exception__not_found, self).__init__('rzdoc not found: \'%s\'' % (rzdoc_name))
class RZ_Kernel(object):
def __init__(self):
self.db_ctl = None
def exec_chain_commit_op(self, diff_obj, ctx):
# FIXME: clean
if isinstance(diff_obj, Topo_Diff):
commit_obj = diff_obj.to_json_dict()
else:
commit_obj = diff_obj
rzdoc = ctx.rzdoc
op = DBO_block_chain__commit(commit_obj, ctx)
op = QT_RZDOC_Meta_NS_Filter(rzdoc)(op)
self.db_ctl.exec_op(op)
def diff_commit__topo(self, topo_diff, ctx=None):
"""
commit a graph topology diff - this is a common pathway for:
- RESP API calls
- socket.io calls
- future interfaces
@return: a tuple containing the input diff and the result of it's commit
"""
rzdoc = ctx.rzdoc
op = DBO_diff_commit__topo(topo_diff)
op = QT_RZDOC_NS_Filter(rzdoc)(op)
try:
op_ret = self.db_ctl.exec_op(op)
self.exec_chain_commit_op(topo_diff, ctx)
return topo_diff, op_ret
except Exception as e:
log.error(e.message)
log.error(traceback.print_exc())
raise e
def diff_commit__attr(self, attr_diff, ctx=None):
"""
commit a graph attribute diff - this is a common pathway for:
- RESP API calls
- socket.io calls
- future interfaces
@return: a tuple containing the input diff and the result of it's commit
"""
rzdoc = ctx.rzdoc
op = DBO_diff_commit__attr(attr_diff)
op = QT_RZDOC_NS_Filter(rzdoc)(op)
try:
op_ret = self.db_ctl.exec_op(op)
self.exec_chain_commit_op(attr_diff, ctx)
return attr_diff, op_ret
except Exception as e:
log.error(e.message)
log.error(traceback.print_exc())
raise e
def rzdoc__clone(self, rzdoc, ctx=None):
"""
Clone entire rzdoc
@return Topo_Diff with node/link attributes
"""
op = DBO_rzdoc__clone()
op = QT_RZDOC_NS_Filter(rzdoc)(op)
try:
topo_diff = self.db_ctl.exec_op(op)
return topo_diff
except Exception as e:
log.exception(e)
log.error(traceback.print_exc())
raise e
def rzdoc__lookup_by_name(self, rzdoc_name, ctx=None):
"""
@param ctx: may be None
@return: RZDoc object or None if rzdoc was not found
"""
op = DBO_rzdoc__lookup_by_name(rzdoc_name)
try:
rzdoc = self.db_ctl.exec_op(op)
if None == rzdoc: return None
return rzdoc
except Exception as e:
log.error(e.message)
raise e
def rzdoc__create(self, rzdoc_name, ctx=None):
"""
Create & persist new RZDoc - may fail on unique name/id constraint violation
@return: RZDoc object
"""
rzdoc = RZDoc(rzdoc_name)
rzdoc.id = neo4j_util.generate_random_rzdoc_id()
op__rzdoc__create = DBO_rzdoc__create(rzdoc)
op__block_chain__init = DBO_block_chain__init(rzdoc)
try:
self.db_ctl.exec_op(op__rzdoc__create)
self.db_ctl.exec_op(op__block_chain__init)
return rzdoc
except Exception as e:
log.error(e.message)
log.error(traceback.print_exc())
raise e
def rzdoc__delete(self, rzdoc, ctx=None):
"""
Delete RZDoc
@return: RZDoc object
"""
op = DBO_rzdoc__delete(rzdoc)
try:
self.db_ctl.exec_op(op)
except Exception as e:
log.error(e.message)
log.error(traceback.print_exc())
raise e
# TODO: broadcast delete event, clear cache mapping entry
def rzdoc__list(self, rzdoc, ctx=None):
"""
List available RZDocs
@return: RZDoc object
"""
op = DBO_rzdoc__list()
try:
op_ret = self.db_ctl.exec_op(op)
return op_ret;
except Exception as e:
log.error(e.message)
log.error(traceback.print_exc())
raise e
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