1/* Copyright 2016 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#include "tensorflow/core/distributed_runtime/server_lib.h"
17
18#include <unordered_map>
19
20#include "tensorflow/core/lib/core/errors.h"
21#include "tensorflow/core/platform/mutex.h"
22
23namespace tensorflow {
24
25namespace {
26mutex* get_server_factory_lock() {
27 static mutex server_factory_lock(LINKER_INITIALIZED);
28 return &server_factory_lock;
29}
30
31typedef std::unordered_map<string, ServerFactory*> ServerFactories;
32ServerFactories* server_factories() {
33 static ServerFactories* factories = new ServerFactories;
34 return factories;
35}
36} // namespace
37
38/* static */
39void ServerFactory::Register(const string& server_type,
40 ServerFactory* factory) {
41 mutex_lock l(*get_server_factory_lock());
42 if (!server_factories()->insert({server_type, factory}).second) {
43 LOG(ERROR) << "Two server factories are being registered under "
44 << server_type;
45 }
46}
47
48/* static */
49Status ServerFactory::GetFactory(const ServerDef& server_def,
50 ServerFactory** out_factory) {
51 mutex_lock l(*get_server_factory_lock());
52 for (const auto& server_factory : *server_factories()) {
53 if (server_factory.second->AcceptsOptions(server_def)) {
54 *out_factory = server_factory.second;
55 return OkStatus();
56 }
57 }
58
59 std::vector<string> server_names;
60 for (const auto& server_factory : *server_factories()) {
61 server_names.push_back(server_factory.first);
62 }
63
64 return errors::NotFound(
65 "No server factory registered for the given ServerDef: ",
66 server_def.DebugString(), "\nThe available server factories are: [ ",
67 absl::StrJoin(server_names, ", "), " ]");
68}
69
70// Creates a server based on the given `server_def`, and stores it in
71// `*out_server`. Returns OK on success, otherwise returns an error.
72Status NewServer(const ServerDef& server_def,
73 std::unique_ptr<ServerInterface>* out_server) {
74 ServerFactory* factory;
75 TF_RETURN_IF_ERROR(ServerFactory::GetFactory(server_def, &factory));
76 return factory->NewServer(server_def, ServerFactory::Options(), out_server);
77}
78
79// Creates a server based on the given `server_def`, and stores it in
80// `*out_server`. Returns OK on success, otherwise returns an error.
81Status NewServerWithOptions(const ServerDef& server_def,
82 const ServerFactory::Options& options,
83 std::unique_ptr<ServerInterface>* out_server) {
84 ServerFactory* factory;
85 TF_RETURN_IF_ERROR(ServerFactory::GetFactory(server_def, &factory));
86 return factory->NewServer(server_def, options, out_server);
87}
88
89} // namespace tensorflow
90