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
|
/*
* SPDX-FileCopyrightText: 2014 Christian Mollekopf <mollekopf@kolabsys.com>
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
*/
#include "batchfetcher.h"
#include "imapresource_debug.h"
#include <KIMAP/Session>
BatchFetcher::BatchFetcher(MessageHelper::Ptr messageHelper,
const KIMAP::ImapSet &set,
const KIMAP::FetchJob::FetchScope &scope,
int batchSize,
KIMAP::Session *session)
: KJob(session)
, m_currentSet(set)
, m_scope(scope)
, m_session(session)
, m_batchSize(batchSize)
, m_messageHelper(messageHelper)
{
}
BatchFetcher::~BatchFetcher() = default;
void BatchFetcher::setUidBased(bool uidBased)
{
m_uidBased = uidBased;
}
void BatchFetcher::setSearchUids(const KIMAP::ImapInterval &interval)
{
m_searchUidInterval = interval;
// We look up the UIDs ourselves
m_currentSet = KIMAP::ImapSet();
// MS Exchange can't handle big results so we have to split the search into small chunks
m_searchInChunks = m_session->serverGreeting().contains("Microsoft Exchange");
}
void BatchFetcher::setGmailExtensionsEnabled(bool enable)
{
m_gmailEnabled = enable;
}
static const int maxAmountOfUidToSearchInOneTime = 2000;
void BatchFetcher::start()
{
if (m_searchUidInterval.size()) {
// Search in chunks also Exchange can handle
const KIMAP::ImapInterval::Id firstUidToSearch = m_searchUidInterval.begin();
const KIMAP::ImapInterval::Id lastUidToSearch =
m_searchInChunks ? qMin(firstUidToSearch + maxAmountOfUidToSearchInOneTime - 1, m_searchUidInterval.end()) : m_searchUidInterval.end();
// Prepare next chunk
const KIMAP::ImapInterval::Id intervalBegin = lastUidToSearch + 1;
// Or are we already done?
if (intervalBegin > m_searchUidInterval.end()) {
m_searchUidInterval = KIMAP::ImapInterval();
} else {
m_searchUidInterval.setBegin(intervalBegin);
}
// Resolve the uid to sequence numbers
auto search = new KIMAP::SearchJob(m_session);
search->setUidBased(true);
search->setTerm(KIMAP::Term(KIMAP::Term::Uid, KIMAP::ImapSet(firstUidToSearch, lastUidToSearch)));
connect(search, &KIMAP::SearchJob::result, this, &BatchFetcher::onUidSearchDone);
search->start();
} else {
fetchNextBatch();
}
}
void BatchFetcher::onUidSearchDone(KJob *job)
{
if (job->error()) {
qCWarning(IMAPRESOURCE_LOG) << "Search job failed: " << job->errorString();
setError(KJob::UserDefinedError);
emitResult();
return;
}
auto search = static_cast<KIMAP::SearchJob *>(job);
m_uidBased = search->isUidBased();
m_currentSet.add(search->results());
// More to search?
start();
}
void BatchFetcher::fetchNextBatch()
{
if (m_fetchInProgress) {
m_continuationRequested = true;
return;
}
m_continuationRequested = false;
Q_ASSERT(m_batchSize > 0);
if (m_currentSet.isEmpty()) {
qCDebug(IMAPRESOURCE_LOG) << "fetch complete";
emitResult();
return;
}
auto fetch = new KIMAP::FetchJob(m_session);
if (m_scope.changedSince != 0) {
qCDebug(IMAPRESOURCE_LOG) << "Fetching all messages in one batch.";
fetch->setSequenceSet(m_currentSet);
m_currentSet = KIMAP::ImapSet();
} else {
KIMAP::ImapSet toFetch;
qint64 counter = 0;
KIMAP::ImapSet newSet;
// Take a chunk from the set
const auto intervals{m_currentSet.intervals()};
for (const KIMAP::ImapInterval &interval : intervals) {
if (!interval.hasDefinedEnd()) {
// If we get an interval without a defined end we simply fetch everything
qCDebug(IMAPRESOURCE_LOG) << "Received interval without defined end, fetching everything in one batch";
toFetch.add(interval);
newSet = KIMAP::ImapSet();
break;
}
const qint64 wantedItems = m_batchSize - counter;
if (counter < m_batchSize) {
if (interval.size() <= wantedItems) {
counter += interval.size();
toFetch.add(interval);
} else {
counter += wantedItems;
toFetch.add(KIMAP::ImapInterval(interval.begin(), interval.begin() + wantedItems - 1));
newSet.add(KIMAP::ImapInterval(interval.begin() + wantedItems, interval.end()));
}
} else {
newSet.add(interval);
}
}
qCDebug(IMAPRESOURCE_LOG) << "Fetching " << toFetch.intervals().size() << " intervals";
fetch->setSequenceSet(toFetch);
m_currentSet = newSet;
}
fetch->setUidBased(m_uidBased);
fetch->setScope(m_scope);
fetch->setGmailExtensionsEnabled(m_gmailEnabled);
connect(fetch, &KIMAP::FetchJob::messagesAvailable, this, &BatchFetcher::onMessagesAvailable);
connect(fetch, &KJob::result, this, &BatchFetcher::onHeadersFetchDone);
m_fetchInProgress = true;
fetch->start();
}
void BatchFetcher::onMessagesAvailable(const QMap<qint64, KIMAP::Message> &messages)
{
auto fetch = static_cast<KIMAP::FetchJob *>(sender());
Akonadi::Item::List addedItems;
for (auto msg = messages.cbegin(), end = messages.cend(); msg != end; ++msg) {
// qDebug( 5327 ) << "Flags: " << i.flags();
bool ok;
const auto item = m_messageHelper->createItemFromMessage(msg->message, msg->uid, msg->size, msg->attributes, msg->flags, fetch->scope(), ok);
if (ok) {
m_fetchedItemsInCurrentBatch++;
addedItems << item;
}
}
// qCDebug(IMAPRESOURCE_LOG) << addedItems.size();
if (!addedItems.isEmpty()) {
Q_EMIT itemsRetrieved(addedItems);
}
}
void BatchFetcher::onHeadersFetchDone(KJob *job)
{
m_fetchInProgress = false;
if (job->error()) {
qCWarning(IMAPRESOURCE_LOG) << "Fetch job failed " << job->errorString();
setError(KJob::UserDefinedError);
emitResult();
return;
}
if (m_currentSet.isEmpty()) {
emitResult();
return;
}
// Fetch more if we didn't deliver enough yet.
// This can happen because no message is in the fetched uid range, or if the translation failed
if (m_fetchedItemsInCurrentBatch < m_batchSize) {
fetchNextBatch();
} else {
m_fetchedItemsInCurrentBatch = 0;
// Also fetch more if we already got a continuation request during the fetch.
// This can happen if we deliver too many items during a previous batch (after using )
// Note that m_fetchedItemsInCurrentBatch will be off by the items that we delivered already.
if (m_continuationRequested) {
fetchNextBatch();
}
}
}
#include "moc_batchfetcher.cpp"
|
