1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "DatabaseTracker.h"
33
34#if ENABLE(DATABASE)
35
36#include "AbstractDatabase.h"
37#include "DatabaseObserver.h"
38#include "QuotaTracker.h"
39#include "PlatformString.h"
40#include "ScriptExecutionContext.h"
41#include "SecurityOrigin.h"
42#include "SecurityOriginHash.h"
43#include "SQLiteFileSystem.h"
44#include <wtf/StdLibExtras.h>
45
46namespace WebCore {
47
48DatabaseTracker& DatabaseTracker::tracker()
49{
50    DEFINE_STATIC_LOCAL(DatabaseTracker, tracker, (""));
51    return tracker;
52}
53
54DatabaseTracker::DatabaseTracker(const String&)
55{
56    SQLiteFileSystem::registerSQLiteVFS();
57}
58
59bool DatabaseTracker::canEstablishDatabase(ScriptExecutionContext* scriptExecutionContext, const String& name, const String& displayName, unsigned long estimatedSize)
60{
61    return DatabaseObserver::canEstablishDatabase(scriptExecutionContext, name, displayName, estimatedSize);
62}
63
64void DatabaseTracker::setDatabaseDetails(SecurityOrigin*, const String&, const String&, unsigned long)
65{
66    // Chromium sets the database details when the database is opened
67}
68
69String DatabaseTracker::fullPathForDatabase(SecurityOrigin* origin, const String& name, bool)
70{
71    return origin->databaseIdentifier() + "/" + name + "#";
72}
73
74void DatabaseTracker::addOpenDatabase(AbstractDatabase* database)
75{
76    ASSERT(database->scriptExecutionContext()->isContextThread());
77    MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
78    if (!m_openDatabaseMap)
79        m_openDatabaseMap.set(new DatabaseOriginMap());
80
81    DatabaseNameMap* nameMap = m_openDatabaseMap->get(database->securityOrigin());
82    if (!nameMap) {
83        nameMap = new DatabaseNameMap();
84        m_openDatabaseMap->set(database->securityOrigin(), nameMap);
85    }
86
87    String name(database->stringIdentifier());
88    DatabaseSet* databaseSet = nameMap->get(name);
89    if (!databaseSet) {
90        databaseSet = new DatabaseSet();
91        nameMap->set(name, databaseSet);
92    }
93
94    databaseSet->add(database);
95
96    DatabaseObserver::databaseOpened(database);
97}
98
99class TrackerRemoveOpenDatabaseTask : public ScriptExecutionContext::Task {
100public:
101    static PassOwnPtr<TrackerRemoveOpenDatabaseTask> create(PassRefPtr<AbstractDatabase> database)
102    {
103        return new TrackerRemoveOpenDatabaseTask(database);
104    }
105
106    virtual void performTask(ScriptExecutionContext* context)
107    {
108        DatabaseTracker::tracker().removeOpenDatabase(m_database.get());
109    }
110
111private:
112    TrackerRemoveOpenDatabaseTask(PassRefPtr<AbstractDatabase> database)
113        : m_database(database)
114    {
115    }
116
117    RefPtr<AbstractDatabase> m_database;
118};
119
120void DatabaseTracker::removeOpenDatabase(AbstractDatabase* database)
121{
122    if (!database->scriptExecutionContext()->isContextThread()) {
123        database->scriptExecutionContext()->postTask(TrackerRemoveOpenDatabaseTask::create(database));
124        return;
125    }
126
127    MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
128    ASSERT(m_openDatabaseMap);
129    DatabaseNameMap* nameMap = m_openDatabaseMap->get(database->securityOrigin());
130    ASSERT(nameMap);
131    String name(database->stringIdentifier());
132    DatabaseSet* databaseSet = nameMap->get(name);
133    ASSERT(databaseSet);
134    databaseSet->remove(database);
135
136    if (databaseSet->isEmpty()) {
137        nameMap->remove(name);
138        delete databaseSet;
139        if (nameMap->isEmpty()) {
140            m_openDatabaseMap->remove(database->securityOrigin());
141            delete nameMap;
142        }
143    }
144
145    DatabaseObserver::databaseClosed(database);
146}
147
148
149void DatabaseTracker::getOpenDatabases(SecurityOrigin* origin, const String& name, HashSet<RefPtr<AbstractDatabase> >* databases)
150{
151    MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
152    if (!m_openDatabaseMap)
153        return;
154
155    DatabaseNameMap* nameMap = m_openDatabaseMap->get(origin);
156    if (!nameMap)
157        return;
158
159    DatabaseSet* databaseSet = nameMap->get(name);
160    if (!databaseSet)
161        return;
162
163    for (DatabaseSet::iterator it = databaseSet->begin(); it != databaseSet->end(); ++it)
164        databases->add(*it);
165}
166
167unsigned long long DatabaseTracker::getMaxSizeForDatabase(const AbstractDatabase* database)
168{
169    unsigned long long spaceAvailable = 0;
170    unsigned long long databaseSize = 0;
171    QuotaTracker::instance().getDatabaseSizeAndSpaceAvailableToOrigin(
172        database->securityOrigin()->databaseIdentifier(),
173        database->stringIdentifier(), &databaseSize, &spaceAvailable);
174    return databaseSize + spaceAvailable;
175}
176
177void DatabaseTracker::interruptAllDatabasesForContext(const ScriptExecutionContext* context)
178{
179    Vector<RefPtr<AbstractDatabase> > openDatabases;
180    {
181        MutexLocker openDatabaseMapLock(m_openDatabaseMapGuard);
182
183        if (!m_openDatabaseMap)
184            return;
185
186        DatabaseNameMap* nameMap = m_openDatabaseMap->get(context->securityOrigin());
187        if (!nameMap)
188            return;
189
190        DatabaseNameMap::const_iterator dbNameMapEndIt = nameMap->end();
191        for (DatabaseNameMap::const_iterator dbNameMapIt = nameMap->begin(); dbNameMapIt != dbNameMapEndIt; ++dbNameMapIt) {
192            DatabaseSet* databaseSet = dbNameMapIt->second;
193            DatabaseSet::const_iterator dbSetEndIt = databaseSet->end();
194            for (DatabaseSet::const_iterator dbSetIt = databaseSet->begin(); dbSetIt != dbSetEndIt; ++dbSetIt) {
195                if ((*dbSetIt)->scriptExecutionContext() == context)
196                    openDatabases.append(*dbSetIt);
197            }
198        }
199    }
200
201    Vector<RefPtr<AbstractDatabase> >::const_iterator openDatabasesEndIt = openDatabases.end();
202    for (Vector<RefPtr<AbstractDatabase> >::const_iterator openDatabasesIt = openDatabases.begin(); openDatabasesIt != openDatabasesEndIt; ++openDatabasesIt)
203        (*openDatabasesIt)->interrupt();
204}
205
206}
207
208#endif // ENABLE(DATABASE)
209