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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/*
* Copyright (C) 2016 Christian Mollekopf <mollekopf@kolabsys.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "entityreader.h"
#include "resultset.h"
#include "storage.h"
#include "query.h"
#include "datastorequery.h"
SINK_DEBUG_AREA("entityreader")
using namespace Sink;
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> EntityReaderUtils::getLatest(const Sink::Storage::NamedDatabase &db, const QByteArray &uid, DomainTypeAdaptorFactoryInterface &adaptorFactory, qint64 &retrievedRevision)
{
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> current;
db.findLatest(uid,
[¤t, &adaptorFactory, &retrievedRevision](const QByteArray &key, const QByteArray &data) -> bool {
Sink::EntityBuffer buffer(const_cast<const char *>(data.data()), data.size());
if (!buffer.isValid()) {
SinkWarning() << "Read invalid buffer from disk";
} else {
SinkTrace() << "Found value " << key;
current = adaptorFactory.createAdaptor(buffer.entity());
retrievedRevision = Sink::Storage::revisionFromKey(key);
}
return false;
},
[](const Sink::Storage::Error &error) { SinkWarning() << "Failed to read current value from storage: " << error.message; });
return current;
}
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> EntityReaderUtils::get(const Sink::Storage::NamedDatabase &db, const QByteArray &key, DomainTypeAdaptorFactoryInterface &adaptorFactory, qint64 &retrievedRevision)
{
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> current;
db.scan(key,
[¤t, &adaptorFactory, &retrievedRevision](const QByteArray &key, const QByteArray &data) -> bool {
Sink::EntityBuffer buffer(const_cast<const char *>(data.data()), data.size());
if (!buffer.isValid()) {
SinkWarning() << "Read invalid buffer from disk";
} else {
current = adaptorFactory.createAdaptor(buffer.entity());
retrievedRevision = Sink::Storage::revisionFromKey(key);
}
return false;
},
[](const Sink::Storage::Error &error) { SinkWarning() << "Failed to read current value from storage: " << error.message; });
return current;
}
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> EntityReaderUtils::getPrevious(const Sink::Storage::NamedDatabase &db, const QByteArray &uid, qint64 revision, DomainTypeAdaptorFactoryInterface &adaptorFactory, qint64 &retrievedRevision)
{
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> current;
qint64 latestRevision = 0;
db.scan(uid,
[¤t, &latestRevision, revision](const QByteArray &key, const QByteArray &) -> bool {
auto foundRevision = Sink::Storage::revisionFromKey(key);
if (foundRevision < revision && foundRevision > latestRevision) {
latestRevision = foundRevision;
}
return true;
},
[](const Sink::Storage::Error &error) { SinkWarning() << "Failed to read current value from storage: " << error.message; }, true);
return get(db, Sink::Storage::assembleKey(uid, latestRevision), adaptorFactory, retrievedRevision);
}
template <class DomainType>
EntityReader<DomainType>::EntityReader(const QByteArray &resourceType, const QByteArray &resourceInstanceIdentifier, Sink::Storage::Transaction &transaction)
: mResourceInstanceIdentifier(resourceInstanceIdentifier),
mTransaction(transaction),
mDomainTypeAdaptorFactoryPtr(Sink::AdaptorFactoryRegistry::instance().getFactory<DomainType>(resourceType)),
mDomainTypeAdaptorFactory(*mDomainTypeAdaptorFactoryPtr)
{
Q_ASSERT(!resourceType.isEmpty());
Q_ASSERT(mDomainTypeAdaptorFactoryPtr);
}
template <class DomainType>
EntityReader<DomainType>::EntityReader(DomainTypeAdaptorFactoryInterface &domainTypeAdaptorFactory, const QByteArray &resourceInstanceIdentifier, Sink::Storage::Transaction &transaction)
: mResourceInstanceIdentifier(resourceInstanceIdentifier),
mTransaction(transaction),
mDomainTypeAdaptorFactory(domainTypeAdaptorFactory)
{
}
template <class DomainType>
DomainType EntityReader<DomainType>::read(const QByteArray &identifier) const
{
auto typeName = ApplicationDomain::getTypeName<DomainType>();
auto mainDatabase = Storage::mainDatabase(mTransaction, typeName);
qint64 retrievedRevision = 0;
auto bufferAdaptor = EntityReaderUtils::getLatest(mainDatabase, identifier, mDomainTypeAdaptorFactory, retrievedRevision);
if (!bufferAdaptor) {
return DomainType();
}
return DomainType(mResourceInstanceIdentifier, identifier, retrievedRevision, bufferAdaptor);
}
template <class DomainType>
DomainType EntityReader<DomainType>::readFromKey(const QByteArray &key) const
{
auto typeName = ApplicationDomain::getTypeName<DomainType>();
auto mainDatabase = Storage::mainDatabase(mTransaction, typeName);
qint64 retrievedRevision = 0;
auto bufferAdaptor = EntityReaderUtils::get(mainDatabase, key, mDomainTypeAdaptorFactory, retrievedRevision);
const auto identifier = Storage::uidFromKey(key);
if (!bufferAdaptor) {
return DomainType();
}
return DomainType(mResourceInstanceIdentifier, identifier, retrievedRevision, bufferAdaptor);
}
template <class DomainType>
DomainType EntityReader<DomainType>::readPrevious(const QByteArray &uid, qint64 revision) const
{
auto typeName = ApplicationDomain::getTypeName<DomainType>();
auto mainDatabase = Storage::mainDatabase(mTransaction, typeName);
qint64 retrievedRevision = 0;
auto bufferAdaptor = EntityReaderUtils::getPrevious(mainDatabase, uid, revision, mDomainTypeAdaptorFactory, retrievedRevision);
if (!bufferAdaptor) {
return DomainType();
}
return DomainType(mResourceInstanceIdentifier, uid, retrievedRevision, bufferAdaptor);
}
template <class DomainType>
void EntityReader<DomainType>::query(const Sink::Query &query, const std::function<bool(const DomainType &)> &callback)
{
executeInitialQuery(query, 0, 0,
[&callback](const typename DomainType::Ptr &value, Sink::Operation operation) -> bool {
Q_ASSERT(operation == Sink::Operation_Creation);
return callback(*value);
});
}
template <class DomainType>
QPair<qint64, qint64> EntityReader<DomainType>::executeInitialQuery(const Sink::Query &query, int offset, int batchsize, const std::function<bool(const typename DomainType::Ptr &value, Sink::Operation operation)> &callback)
{
QTime time;
time.start();
auto preparedQuery = ApplicationDomain::TypeImplementation<DomainType>::prepareQuery(query, mTransaction);
auto resultSet = preparedQuery->execute();
SinkTrace() << "Filtered set retrieved. " << Log::TraceTime(time.elapsed());
auto replayedEntities = replaySet(resultSet, offset, batchsize, callback);
SinkTrace() << "Initial query took: " << Log::TraceTime(time.elapsed());
return qMakePair(Sink::Storage::maxRevision(mTransaction), replayedEntities);
}
template <class DomainType>
QPair<qint64, qint64> EntityReader<DomainType>::executeIncrementalQuery(const Sink::Query &query, qint64 lastRevision, const std::function<bool(const typename DomainType::Ptr &value, Sink::Operation operation)> &callback)
{
QTime time;
time.start();
const qint64 baseRevision = lastRevision + 1;
auto preparedQuery = ApplicationDomain::TypeImplementation<DomainType>::prepareQuery(query, mTransaction);
auto resultSet = preparedQuery->update(baseRevision);
SinkTrace() << "Filtered set retrieved. " << Log::TraceTime(time.elapsed());
auto replayedEntities = replaySet(resultSet, 0, 0, callback);
SinkTrace() << "Incremental query took: " << Log::TraceTime(time.elapsed());
return qMakePair(Sink::Storage::maxRevision(mTransaction), replayedEntities);
}
template <class DomainType>
qint64 EntityReader<DomainType>::replaySet(ResultSet &resultSet, int offset, int batchSize, const std::function<bool(const typename DomainType::Ptr &value, Sink::Operation operation)> &callback)
{
SinkTrace() << "Skipping over " << offset << " results";
resultSet.skip(offset);
int counter = 0;
while (!batchSize || (counter < batchSize)) {
const bool ret =
resultSet.next([this, &counter, callback](const QByteArray &uid, const Sink::EntityBuffer &value, Sink::Operation operation) -> bool {
counter++;
auto adaptor = mDomainTypeAdaptorFactory.createAdaptor(value.entity());
Q_ASSERT(adaptor);
return callback(QSharedPointer<DomainType>::create(mResourceInstanceIdentifier, uid, value.revision(), adaptor), operation);
});
if (!ret) {
break;
}
};
SinkTrace() << "Replayed " << counter << " results."
<< "Limit " << batchSize;
return counter;
}
template class Sink::EntityReader<Sink::ApplicationDomain::Folder>;
template class Sink::EntityReader<Sink::ApplicationDomain::Mail>;
template class Sink::EntityReader<Sink::ApplicationDomain::Event>;
|
