diff options
Diffstat (limited to 'runtime/solvers/mzn/mzn_solver.py')
| -rw-r--r-- | runtime/solvers/mzn/mzn_solver.py | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/runtime/solvers/mzn/mzn_solver.py b/runtime/solvers/mzn/mzn_solver.py index cf002e7..f3daa2b 100644 --- a/runtime/solvers/mzn/mzn_solver.py +++ b/runtime/solvers/mzn/mzn_solver.py @@ -16,10 +16,15 @@ # ------------------------------------------------------------------------- # -import json from datetime import datetime +import json -from pymzn import Status, minizinc, cbc, gecode, chuffed, or_tools +from pymzn import cbc +from pymzn import chuffed +from pymzn import gecode +from pymzn import minizinc +from pymzn import or_tools +from pymzn import Status from osdf.utils.file_utils import delete_file_folder @@ -47,6 +52,10 @@ def map_status(status): def solve(request_json, mzn_content): + """Given the request and minizinc content. Translates the json request to the format minizinc understands + + return: returns the optimized solution. + """ req_info = request_json['requestInfo'] opt_info = request_json['optimInfo'] try: @@ -71,6 +80,9 @@ def solve(request_json, mzn_content): def mzn_solver(mzn_content, opt_info): + """Calls the minizinc optimizer. + + """ args = opt_info['solverArgs'] solver = get_mzn_solver(args.pop('solver')) mzn_opts = dict() @@ -85,18 +97,36 @@ def mzn_solver(mzn_content, opt_info): def persist_opt_data(opt_info): + """Persist the opt data, if included as part of the request. + + return: file_name path of the optim_data + returns None if no optData is part of the request + """ + file_name = None + if 'optData' in opt_info: + if opt_info['optData'].get('json'): + data_content = json.dumps(opt_info['optData']['json']) + file_name = '/tmp/optim_engine_{}.json'.format(datetime.timestamp(datetime.now())) + persist_data(data_content, file_name) + elif opt_info['optData'].get('text'): + data_content = opt_info['optData']['text'] + file_name = '/tmp/optim_engine_{}.dzn'.format(datetime.timestamp(datetime.now())) + persist_data(data_content, file_name) + return file_name + - if opt_info['optData'].get('json'): - data_content = json.dumps(opt_info['optData']['json']) - file_name = '/tmp/optim_engine_{}.json'.format(datetime.timestamp(datetime.now())) - elif opt_info['optData'].get('text'): - data_content = opt_info['optData']['text'] - file_name = '/tmp/optim_engine_{}.dzn'.format(datetime.timestamp(datetime.now())) +def persist_data(data_content, file_name): + """Save the dzn data into a file + """ with open(file_name, "wt") as data: data.write(data_content) - return file_name def get_mzn_solver(solver): + """Returns a solver type object for minizinc optimizers + + solver: solver that is part of the request + return: solver mapped object + """ return solver_dict.get(solver) |