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refs #600, turned CUrlList into a plain vanilla list

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* bundled all load balancing in CFailoverUrlList. "Obtain" functions are non-const, no need of mutable members
This commit is contained in:
Klaus Basan
2016-03-13 00:40:11 +00:00
committed by Mathew Sutcliffe
parent 89d9b3ad39
commit 1a1e4681fe
5 changed files with 56 additions and 77 deletions
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91
src/blackmisc/network/urllist.cpp
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@@ -20,22 +20,11 @@ namespace BlackMisc
CUrlList::CUrlList() { }
CUrlList::CUrlList(const CUrlList &other) : CSequence<CUrl>(other)
{
*this = other;
}
{ }
CUrlList &CUrlList::operator =(const CUrlList &other)
{
if (this == &other) { return *this; }
QReadLocker readLock(&other.m_lock);
int index = other.m_currentIndexDistributedLoad;
readLock.unlock(); // avoid deadlock
QWriteLocker writeLock(&this->m_lock);
this->m_currentIndexDistributedLoad = index;
return *this;
}
CUrlList::CUrlList(const CSequence<CUrl> &other) :
CSequence<CUrl>(other)
{ }
CUrlList::CUrlList(const QStringList &listOfUrls, bool removeDuplicates)
{
@@ -47,10 +36,6 @@ namespace BlackMisc
}
}
CUrlList::CUrlList(const CSequence<CUrl> &other) :
CSequence<CUrl>(other)
{ }
CUrl CUrlList::getRandomUrl() const
{
if (this->isEmpty()) { return CUrl(); }
@@ -83,36 +68,6 @@ namespace BlackMisc
return copy.getRandomUrl();
}
CUrl CUrlList::getNextUrl(bool randomStart) const
{
if (this->isEmpty()) { return CUrl(); }
if (this->size() == 1) { return this->front();}
if (m_currentIndexDistributedLoad < 0)
{
// random start point
m_currentIndexDistributedLoad = randomStart ?
CMathUtils::randomInteger(0, this->size() - 1) :
0;
}
else
{
m_currentIndexDistributedLoad++;
if (m_currentIndexDistributedLoad >= this->size())
{
m_currentIndexDistributedLoad = 0;
}
}
return (*this)[m_currentIndexDistributedLoad];
}
CUrl CUrlList::getNextUrlWithout(const CUrlList &exclude, bool randomStart) const
{
CUrlList copy(*this);
copy.removeIfIn(exclude);
if (copy.isEmpty()) { return CUrl(); }
return copy.getNextUrl(randomStart);
}
CUrlList CUrlList::appendPath(const QString &path) const
{
if (path.isEmpty() || this->isEmpty()) { return (*this); }
@@ -144,7 +99,7 @@ namespace BlackMisc
int CUrlList::removeDuplicates()
{
if (this->size() < 2) { return 0; }
CUrlList withoutDuplicates(getWithoutDuplicates());
const CUrlList withoutDuplicates(getWithoutDuplicates());
if (this->size() == withoutDuplicates.size()) { return 0; }
int r = this->size() - withoutDuplicates.size();
(*this) = withoutDuplicates;
@@ -187,16 +142,46 @@ namespace BlackMisc
return (m_failedUrls.size() < this->size() && m_failedUrls.size() < m_maxTrials);
}
CUrl CFailoverUrlList::getNextWorkingUrl(const CUrl &failedUrl, bool random)
CUrl CFailoverUrlList::obtainNextWorkingUrl(bool random, const CUrl &failedUrl)
{
if (!failedUrl.isEmpty()) { this->addFailedUrl(failedUrl); }
if (!hasMoreUrlsToTry()) { return CUrl(); }
CUrl url(this->getNextUrlWithout(this->m_failedUrls, random));
const CUrl url(this->obtainNextUrlWithout(random, this->m_failedUrls));
if (CNetworkUtils::canConnect(url)) { return url; }
if (addFailedUrl(url)) { return getNextWorkingUrl(); }
if (addFailedUrl(url)) { return obtainNextWorkingUrl(); }
return CUrl();
}
CUrl CFailoverUrlList::obtainNextUrl(bool randomStart)
{
if (this->isEmpty()) { return CUrl(); }
if (this->size() == 1) { return this->front();}
if (m_currentIndexDistributedLoad < 0)
{
// random start point
m_currentIndexDistributedLoad = randomStart ?
CMathUtils::randomInteger(0, this->size() - 1) :
0;
}
else
{
m_currentIndexDistributedLoad++;
if (m_currentIndexDistributedLoad >= this->size())
{
m_currentIndexDistributedLoad = 0;
}
}
return (*this)[m_currentIndexDistributedLoad];
}
CUrl CFailoverUrlList::obtainNextUrlWithout(bool randomStart, const CUrlList &exclude) const
{
CFailoverUrlList copy(*this);
copy.removeIfIn(exclude);
if (copy.isEmpty()) { return CUrl(); }
return copy.obtainNextUrl(randomStart);
}
void CFailoverUrlList::reset(int maxTrials)
{
this->m_failedUrls.clear();