1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/policy/policy_service_impl.h"
#include "base/observer_list.h"
#include "base/stl_util.h"
namespace policy {
struct PolicyServiceImpl::Entry {
PolicyMap policies;
ObserverList<PolicyService::Observer, true> observers;
};
struct PolicyServiceImpl::ProviderData {
ConfigurationPolicyProvider* provider;
ConfigurationPolicyObserverRegistrar registrar;
PolicyMap policies;
};
PolicyServiceImpl::PolicyServiceImpl(const Providers& providers) {
for (size_t i = 0; i < providers.size(); ++i) {
ConfigurationPolicyProvider* provider = providers[i];
ProviderData* data = new ProviderData;
data->provider = provider;
data->registrar.Init(provider, this);
if (provider->IsInitializationComplete())
provider->Provide(&data->policies);
providers_.push_back(data);
}
// There are no observers yet, but calls to GetPolicies() should already get
// the processed policy values.
MergeAndTriggerUpdates();
}
PolicyServiceImpl::~PolicyServiceImpl() {
STLDeleteElements(&providers_);
STLDeleteValues(&entries_);
}
void PolicyServiceImpl::AddObserver(PolicyDomain domain,
const std::string& component_id,
PolicyService::Observer* observer) {
PolicyNamespace ns = std::make_pair(domain, component_id);
GetOrCreate(ns)->observers.AddObserver(observer);
}
void PolicyServiceImpl::RemoveObserver(PolicyDomain domain,
const std::string& component_id,
PolicyService::Observer* observer) {
PolicyNamespace ns = std::make_pair(domain, component_id);
EntryMap::const_iterator it = entries_.find(ns);
if (it == entries_.end()) {
NOTREACHED();
return;
}
it->second->observers.RemoveObserver(observer);
MaybeCleanup(ns);
}
const PolicyMap* PolicyServiceImpl::GetPolicies(
PolicyDomain domain,
const std::string& component_id) const {
PolicyNamespace ns = std::make_pair(domain, component_id);
EntryMap::const_iterator it = entries_.find(ns);
return it == entries_.end() ? NULL : &it->second->policies;
}
void PolicyServiceImpl::OnUpdatePolicy(ConfigurationPolicyProvider* provider) {
ProviderList::iterator it = GetProviderData(provider);
if (it == providers_.end())
return;
provider->Provide(&(*it)->policies);
MergeAndTriggerUpdates();
}
void PolicyServiceImpl::OnProviderGoingAway(
ConfigurationPolicyProvider* provider) {
ProviderList::iterator it = GetProviderData(provider);
if (it == providers_.end())
return;
delete *it;
providers_.erase(it);
MergeAndTriggerUpdates();
}
PolicyServiceImpl::Entry* PolicyServiceImpl::GetOrCreate(
const PolicyNamespace& ns) {
Entry*& entry = entries_[ns];
if (!entry)
entry = new Entry;
return entry;
}
PolicyServiceImpl::ProviderList::iterator PolicyServiceImpl::GetProviderData(
ConfigurationPolicyProvider* provider) {
for (ProviderList::iterator it = providers_.begin();
it != providers_.end(); ++it) {
if ((*it)->provider == provider)
return it;
}
NOTREACHED();
return providers_.end();
}
void PolicyServiceImpl::MaybeCleanup(const PolicyNamespace& ns) {
EntryMap::iterator it = entries_.find(ns);
if (it != entries_.end() &&
it->second->policies.empty() &&
it->second->observers.size() == 0) {
delete it->second;
entries_.erase(it);
}
}
void PolicyServiceImpl::MergeAndTriggerUpdates() {
// TODO(joaodasilva): do this for each namespace once the providers also
// provide policy for more namespaces.
PolicyMap new_policies;
for (ProviderList::iterator it = providers_.begin();
it != providers_.end(); ++it) {
new_policies.MergeFrom((*it)->policies);
}
Entry* entry = GetOrCreate(std::make_pair(POLICY_DOMAIN_CHROME, ""));
if (!new_policies.Equals(entry->policies)) {
entry->policies.Swap(&new_policies);
FOR_EACH_OBSERVER(PolicyService::Observer,
entry->observers,
OnPolicyUpdated(POLICY_DOMAIN_CHROME, ""));
}
}
} // namespace policy
|
