Remove old terraysnc backend methods.

Only in-process HTTP access is supported now, SVN and rsync
and removed. This is to allow changes for better use of the
HTTP API.
This commit is contained in:
James Turner 2016-05-25 20:27:24 +01:00
parent 2b15b6b8ad
commit 9d2df12ab8
2 changed files with 64 additions and 321 deletions

View File

@ -59,23 +59,14 @@
#include <simgear/debug/BufferedLogCallback.hxx>
#include <simgear/props/props_io.hxx>
#include <simgear/io/HTTPClient.hxx>
#include <simgear/io/SVNRepository.hxx>
#include <simgear/io/HTTPRepository.hxx>
#include <simgear/io/DNSClient.hxx>
#include <simgear/structure/exception.hxx>
#include <simgear/math/sg_random.h>
static const bool svn_built_in_available = true;
using namespace simgear;
using namespace std;
const char* rsync_cmd =
"rsync --verbose --archive --delete --perms --owner --group";
const char* svn_options =
"checkout -q";
namespace UpdateInterval
{
// interval in seconds to allow an update to repeat after a successful update (=daily)
@ -89,6 +80,7 @@ typedef map<string,time_t> TileAgeCache;
///////////////////////////////////////////////////////////////////////////////
// helper functions ///////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
string stripPath(string path)
{
// svn doesn't like trailing white-spaces or path separators - strip them!
@ -199,52 +191,15 @@ static unsigned int syncSlotForType(SyncItem::Type ty)
}
}
///////////////////////////////////////////////////////////////////////////////
// Base server query
///////////////////////////////////////////////////////////////////////////////
class ServerSelectQuery : public HTTP::Request
///////////////////////////////////////////////////////////////////////////////
// SGTerraSync::WorkerThread //////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
class SGTerraSync::WorkerThread : public SGThread
{
public:
ServerSelectQuery() :
HTTP::Request("http://scenery.flightgear.org/svn-server", "GET")
{
}
std::string svnUrl() const
{
std::string s = simgear::strutils::strip(m_url);
if (s.at(s.length() - 1) == '/') {
s = s.substr(0, s.length() - 1);
}
return s;
}
protected:
virtual void gotBodyData(const char* s, int n)
{
m_url.append(std::string(s, n));
}
virtual void onFail()
{
SG_LOG(SG_TERRASYNC, SG_ALERT, "Failed to query TerraSync SVN server");
HTTP::Request::onFail();
}
private:
std::string m_url;
};
///////////////////////////////////////////////////////////////////////////////
// SGTerraSync::SvnThread /////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
class SGTerraSync::SvnThread : public SGThread
{
public:
SvnThread();
virtual ~SvnThread( ) { stop(); }
WorkerThread();
virtual ~WorkerThread( ) { stop(); }
void stop();
bool start();
@ -255,23 +210,17 @@ public:
bool hasNewTiles() { return !_freshTiles.empty();}
SyncItem getNewTile() { return _freshTiles.pop_front();}
void setSvnServer(string server) { _svn_server = stripPath(server);}
void setSvnDataServer(string server) { _svn_data_server = stripPath(server);}
void setHTTPServer(const std::string& server)
{
_httpServer = stripPath(server);
}
void setExtSvnUtility(string svn_util) { _svn_command = simgear::strutils::strip(svn_util);}
void setRsyncServer(string server) { _rsync_server = simgear::strutils::strip(server);}
void setLocalDir(string dir) { _local_dir = stripPath(dir);}
string getLocalDir() { return _local_dir;}
void setUseSvn(bool use_svn) { _use_svn = use_svn;}
void setAllowedErrorCount(int errors) {_allowed_errors = errors;}
void setCachePath(const SGPath& p) {_persistentCachePath = p;}
void setCacheHits(unsigned int hits) {_cache_hits = hits;}
void setUseBuiltin(bool built_in) { _use_built_in = built_in;}
volatile bool _active;
volatile bool _running;
@ -290,11 +239,6 @@ public:
private:
virtual void run();
// external model run and helpers
void runExternal();
void syncPathExternal(const SyncItem& next);
bool runExternalSyncCommand(const char* dir);
// internal mode run and helpers
void runInternal();
void updateSyncSlot(SyncSlot& slot);
@ -308,7 +252,6 @@ private:
void fail(SyncItem failedItem);
void notFound(SyncItem notFoundItem);
bool _use_built_in;
HTTP::Client _http;
SyncSlot _syncSlots[NUM_SYNC_SLOTS];
@ -320,17 +263,12 @@ private:
TileAgeCache _notFoundItems;
SGBlockingDeque <SyncItem> _freshTiles;
bool _use_svn;
string _svn_server;
string _svn_data_server;
string _svn_command;
string _rsync_server;
string _local_dir;
SGPath _persistentCachePath;
string _httpServer;
};
SGTerraSync::SvnThread::SvnThread() :
SGTerraSync::WorkerThread::WorkerThread() :
_active(false),
_running(false),
_busy(false),
@ -343,15 +281,13 @@ SGTerraSync::SvnThread::SvnThread() :
_cache_hits(0),
_transfer_rate(0),
_total_kb_downloaded(0),
_use_built_in(true),
_is_dirty(false),
_stop(false),
_use_svn(true)
_stop(false)
{
_http.setUserAgent("terrascenery-" SG_STRINGIZE(SIMGEAR_VERSION));
}
void SGTerraSync::SvnThread::stop()
void SGTerraSync::WorkerThread::stop()
{
// drop any pending requests
waitingTiles.clear();
@ -367,7 +303,7 @@ void SGTerraSync::SvnThread::stop()
_running = false;
}
bool SGTerraSync::SvnThread::start()
bool SGTerraSync::WorkerThread::start()
{
if (_running)
return false;
@ -403,18 +339,6 @@ bool SGTerraSync::SvnThread::start()
return false;
}
_use_svn |= _use_built_in;
if ((!_use_svn)&&(_rsync_server==""))
{
SG_LOG(SG_TERRASYNC,SG_ALERT,
"Cannot start scenery download. Rsync scenery server is undefined.");
_fail_count++;
_stalled = true;
return false;
}
_fail_count = 0;
_updated_tile_count = 0;
_success_count = 0;
@ -423,20 +347,7 @@ bool SGTerraSync::SvnThread::start()
_stalled = false;
_running = true;
string status;
if (_use_svn && _use_built_in)
status = "Using built-in SVN support. ";
else if (_use_svn)
{
status = "Using external SVN utility '";
status += _svn_command;
status += "'. ";
}
else
{
status = "Using RSYNC. ";
}
string status = "Using built-in HTTP support.";
// not really an alert - but we want to (always) see this message, so user is
// aware we're downloading scenery (and using bandwidth).
@ -449,61 +360,7 @@ bool SGTerraSync::SvnThread::start()
return true;
}
bool SGTerraSync::SvnThread::runExternalSyncCommand(const char* dir)
{
ostringstream buf;
SGPath localPath( _local_dir );
localPath.append( dir );
if (_use_svn)
{
buf << "\"" << _svn_command << "\" "
<< svn_options << " "
<< "\"" << _svn_server << "/" << dir << "\" "
<< "\"" << localPath.str_native() << "\"";
} else {
buf << rsync_cmd << " "
<< "\"" << _rsync_server << "/" << dir << "/\" "
<< "\"" << localPath.str_native() << "/\"";
}
string command;
#ifdef SG_WINDOWS
// windows command line parsing is just lovely...
// to allow white spaces, the system call needs this:
// ""C:\Program Files\something.exe" somearg "some other arg""
// Note: whitespace strings quoted by a pair of "" _and_ the
// entire string needs to be wrapped by "" too.
// The svn url needs forward slashes (/) as a path separator while
// the local path needs windows-native backslash as a path separator.
command = "\"" + buf.str() + "\"";
#else
command = buf.str();
#endif
SG_LOG(SG_TERRASYNC,SG_DEBUG, "sync command '" << command << "'");
#ifdef SG_WINDOWS
// tbd: does Windows support "popen"?
int rc = system( command.c_str() );
#else
FILE* pipe = popen( command.c_str(), "r");
int rc=-1;
// wait for external process to finish
if (pipe)
rc = pclose(pipe);
#endif
if (rc)
{
SG_LOG(SG_TERRASYNC,SG_ALERT,
"Failed to synchronize directory '" << dir << "', " <<
"error code= " << rc);
return false;
}
return true;
}
void SGTerraSync::SvnThread::run()
void SGTerraSync::WorkerThread::run()
{
_active = true;
initCompletedTilesPersistentCache();
@ -566,106 +423,15 @@ void SGTerraSync::SvnThread::run()
SG_LOG(SG_TERRASYNC,SG_INFO, "picking entry # " << idx << ", server is " << _httpServer );
}
}
if( _httpServer.empty() ) { // don't resolve SVN server is HTTP server is set
if ( _svn_server.empty()) {
SG_LOG(SG_TERRASYNC,SG_INFO, "Querying closest TerraSync server");
ServerSelectQuery* ssq = new ServerSelectQuery;
HTTP::Request_ptr req = ssq;
_http.makeRequest(req);
while (!req->isComplete()) {
_http.update(20);
}
if (req->readyState() == HTTP::Request::DONE) {
_svn_server = ssq->svnUrl();
SG_LOG(SG_TERRASYNC,SG_INFO, "Closest TerraSync server:" << _svn_server);
} else {
SG_LOG(SG_TERRASYNC,SG_WARN, "Failed to query closest TerraSync server");
}
} else {
SG_LOG(SG_TERRASYNC,SG_INFO, "Explicit: TerraSync server:" << _svn_server);
}
if (_svn_server.empty()) {
#if WE_HAVE_A_DEFAULT_SERVER_BUT_WE_DONT_THIS_URL_IS_NO_LONGER_VALID
// default value
_svn_server = "http://foxtrot.mgras.net:8080/terrascenery/trunk/data/Scenery";
#endif
}
}
if (_use_built_in) {
runInternal();
} else {
runExternal();
}
_active = false;
_running = false;
_is_dirty = true;
}
void SGTerraSync::SvnThread::runExternal()
{
while (!_stop)
{
SyncItem next = waitingTiles.pop_front();
if (_stop)
break;
SyncItem::Status cacheStatus = isPathCached(next);
if (cacheStatus != SyncItem::Invalid) {
_cache_hits++;
SG_LOG(SG_TERRASYNC, SG_DEBUG,
"Cache hit for: '" << next._dir << "'");
next._status = cacheStatus;
_freshTiles.push_back(next);
_is_dirty = true;
continue;
}
syncPathExternal(next);
if ((_allowed_errors >= 0)&&
(_consecutive_errors >= _allowed_errors))
{
_stalled = true;
_stop = true;
}
} // of thread running loop
}
void SGTerraSync::SvnThread::syncPathExternal(const SyncItem& next)
{
_busy = true;
SGPath path( _local_dir );
path.append( next._dir );
bool isNewDirectory = !path.exists();
try {
if (isNewDirectory) {
int rc = path.create_dir( 0755 );
if (rc) {
SG_LOG(SG_TERRASYNC,SG_ALERT,
"Cannot create directory '" << path << "', return code = " << rc );
throw sg_exception("Cannot create directory for terrasync", path.str());
}
}
if (!runExternalSyncCommand(next._dir.c_str())) {
throw sg_exception("Running external sync command failed");
}
} catch (sg_exception& e) {
fail(next);
_busy = false;
return;
}
updated(next, isNewDirectory);
_busy = false;
}
void SGTerraSync::SvnThread::updateSyncSlot(SyncSlot &slot)
void SGTerraSync::WorkerThread::updateSyncSlot(SyncSlot &slot)
{
if (slot.repository.get()) {
if (slot.repository->isDoingSync()) {
@ -680,7 +446,7 @@ void SGTerraSync::SvnThread::updateSyncSlot(SyncSlot &slot)
}
// check result
SVNRepository::ResultCode res = slot.repository->failure();
AbstractRepository::ResultCode res = slot.repository->failure();
if (res == AbstractRepository::REPO_ERROR_NOT_FOUND) {
notFound(slot.currentItem);
} else if (res != AbstractRepository::REPO_NO_ERROR) {
@ -714,18 +480,9 @@ void SGTerraSync::SvnThread::updateSyncSlot(SyncSlot &slot)
}
} // of creating directory step
string serverUrl(_svn_server);
if (!_httpServer.empty()) {
slot.repository.reset(new HTTPRepository(path, &_http));
serverUrl = _httpServer;
} else {
if (slot.currentItem._type == SyncItem::AIData) {
serverUrl = _svn_data_server;
}
slot.repository.reset(new SVNRepository(path, &_http));
}
slot.repository->setBaseUrl(_httpServer + "/" + slot.currentItem._dir);
slot.repository->setBaseUrl(serverUrl + "/" + slot.currentItem._dir);
try {
slot.repository->update();
} catch (sg_exception& e) {
@ -744,7 +501,7 @@ void SGTerraSync::SvnThread::updateSyncSlot(SyncSlot &slot)
}
}
void SGTerraSync::SvnThread::runInternal()
void SGTerraSync::WorkerThread::runInternal()
{
while (!_stop) {
try {
@ -794,7 +551,7 @@ void SGTerraSync::SvnThread::runInternal()
} // of thread running loop
}
SyncItem::Status SGTerraSync::SvnThread::isPathCached(const SyncItem& next) const
SyncItem::Status SGTerraSync::WorkerThread::isPathCached(const SyncItem& next) const
{
TileAgeCache::const_iterator ii = _completedTiles.find( next._dir );
if (ii == _completedTiles.end()) {
@ -816,7 +573,7 @@ SyncItem::Status SGTerraSync::SvnThread::isPathCached(const SyncItem& next) cons
return (ii->second > now) ? SyncItem::Cached : SyncItem::Invalid;
}
void SGTerraSync::SvnThread::fail(SyncItem failedItem)
void SGTerraSync::WorkerThread::fail(SyncItem failedItem)
{
time_t now = time(0);
_consecutive_errors++;
@ -829,7 +586,7 @@ void SGTerraSync::SvnThread::fail(SyncItem failedItem)
_is_dirty = true;
}
void SGTerraSync::SvnThread::notFound(SyncItem item)
void SGTerraSync::WorkerThread::notFound(SyncItem item)
{
// treat not found as authorative, so use the same cache expiry
// as succesful download. Important for MP models and similar so
@ -844,7 +601,7 @@ void SGTerraSync::SvnThread::notFound(SyncItem item)
writeCompletedTilesPersistentCache();
}
void SGTerraSync::SvnThread::updated(SyncItem item, bool isNewDirectory)
void SGTerraSync::WorkerThread::updated(SyncItem item, bool isNewDirectory)
{
time_t now = time(0);
_consecutive_errors = 0;
@ -863,7 +620,7 @@ void SGTerraSync::SvnThread::updated(SyncItem item, bool isNewDirectory)
writeCompletedTilesPersistentCache();
}
void SGTerraSync::SvnThread::initCompletedTilesPersistentCache()
void SGTerraSync::WorkerThread::initCompletedTilesPersistentCache()
{
if (!_persistentCachePath.exists()) {
return;
@ -896,7 +653,7 @@ void SGTerraSync::SvnThread::initCompletedTilesPersistentCache()
}
}
void SGTerraSync::SvnThread::writeCompletedTilesPersistentCache() const
void SGTerraSync::WorkerThread::writeCompletedTilesPersistentCache() const
{
// cache is disabled
if (_persistentCachePath.isNull()) {
@ -931,11 +688,11 @@ void SGTerraSync::SvnThread::writeCompletedTilesPersistentCache() const
// SGTerraSync ////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
SGTerraSync::SGTerraSync() :
_svnThread(NULL),
_workerThread(NULL),
_bound(false),
_inited(false)
{
_svnThread = new SvnThread();
_workerThread = new WorkerThread();
_log = new BufferedLogCallback(SG_TERRASYNC, SG_INFO);
_log->truncateAt(255);
@ -944,8 +701,8 @@ SGTerraSync::SGTerraSync() :
SGTerraSync::~SGTerraSync()
{
delete _svnThread;
_svnThread = NULL;
delete _workerThread;
_workerThread = NULL;
sglog().removeCallback(_log);
delete _log;
_tiedProperties.Untie();
@ -965,56 +722,42 @@ void SGTerraSync::init()
_inited = true;
assert(_terraRoot);
_terraRoot->setBoolValue("built-in-svn-available",svn_built_in_available);
_terraRoot->setBoolValue("built-in-svn-available", true);
reinit();
}
void SGTerraSync::shutdown()
{
_svnThread->stop();
_workerThread->stop();
}
void SGTerraSync::reinit()
{
// do not reinit when enabled and we're already up and running
if ((_terraRoot->getBoolValue("enabled",false))&&
(_svnThread->_active && _svnThread->_running))
(_workerThread->_active && _workerThread->_running))
{
return;
}
_svnThread->stop();
_workerThread->stop();
if (_terraRoot->getBoolValue("enabled",false))
{
_svnThread->setSvnServer(_terraRoot->getStringValue("svn-server",""));
std::string httpServer(_terraRoot->getStringValue("http-server",""));
_svnThread->setHTTPServer(httpServer);
_svnThread->setSvnDataServer(_terraRoot->getStringValue("svn-data-server",""));
_svnThread->setRsyncServer(_terraRoot->getStringValue("rsync-server",""));
_svnThread->setLocalDir(_terraRoot->getStringValue("scenery-dir",""));
_svnThread->setAllowedErrorCount(_terraRoot->getIntValue("max-errors",5));
_svnThread->setUseBuiltin(_terraRoot->getBoolValue("use-built-in-svn",true));
_workerThread->setHTTPServer(httpServer);
_workerThread->setLocalDir(_terraRoot->getStringValue("scenery-dir",""));
_workerThread->setAllowedErrorCount(_terraRoot->getIntValue("max-errors",5));
_workerThread->setCacheHits(_terraRoot->getIntValue("cache-hit", 0));
if (httpServer.empty()) {
// HTTP doesn't benefit from using the persistent cache
_svnThread->setCachePath(SGPath(_terraRoot->getStringValue("cache-path","")));
} else {
SG_LOG(SG_TERRASYNC, SG_INFO, "HTTP repository selected, disabling persistent cache");
}
_svnThread->setCacheHits(_terraRoot->getIntValue("cache-hit", 0));
_svnThread->setUseSvn(_terraRoot->getBoolValue("use-svn",true));
_svnThread->setExtSvnUtility(_terraRoot->getStringValue("ext-svn-utility","svn"));
if (_svnThread->start())
if (_workerThread->start())
{
syncAirportsModels();
}
}
_stalledNode->setBoolValue(_svnThread->_stalled);
_stalledNode->setBoolValue(_workerThread->_stalled);
}
void SGTerraSync::bind()
@ -1024,17 +767,17 @@ void SGTerraSync::bind()
}
_bound = true;
_tiedProperties.Tie( _terraRoot->getNode("busy", true), (bool*) &_svnThread->_busy );
_tiedProperties.Tie( _terraRoot->getNode("active", true), (bool*) &_svnThread->_active );
_tiedProperties.Tie( _terraRoot->getNode("update-count", true), (int*) &_svnThread->_success_count );
_tiedProperties.Tie( _terraRoot->getNode("error-count", true), (int*) &_svnThread->_fail_count );
_tiedProperties.Tie( _terraRoot->getNode("tile-count", true), (int*) &_svnThread->_updated_tile_count );
_tiedProperties.Tie( _terraRoot->getNode("cache-hits", true), (int*) &_svnThread->_cache_hits );
_tiedProperties.Tie( _terraRoot->getNode("transfer-rate-bytes-sec", true), (int*) &_svnThread->_transfer_rate );
_tiedProperties.Tie( _terraRoot->getNode("busy", true), (bool*) &_workerThread->_busy );
_tiedProperties.Tie( _terraRoot->getNode("active", true), (bool*) &_workerThread->_active );
_tiedProperties.Tie( _terraRoot->getNode("update-count", true), (int*) &_workerThread->_success_count );
_tiedProperties.Tie( _terraRoot->getNode("error-count", true), (int*) &_workerThread->_fail_count );
_tiedProperties.Tie( _terraRoot->getNode("tile-count", true), (int*) &_workerThread->_updated_tile_count );
_tiedProperties.Tie( _terraRoot->getNode("cache-hits", true), (int*) &_workerThread->_cache_hits );
_tiedProperties.Tie( _terraRoot->getNode("transfer-rate-bytes-sec", true), (int*) &_workerThread->_transfer_rate );
// use kbytes here because propety doesn't support 64-bit and we might conceivably
// download more than 2G in a single session
_tiedProperties.Tie( _terraRoot->getNode("downloaded-kbytes", true), (int*) &_svnThread->_total_kb_downloaded );
_tiedProperties.Tie( _terraRoot->getNode("downloaded-kbytes", true), (int*) &_workerThread->_total_kb_downloaded );
_terraRoot->getNode("busy", true)->setAttribute(SGPropertyNode::WRITE,false);
_terraRoot->getNode("active", true)->setAttribute(SGPropertyNode::WRITE,false);
@ -1045,13 +788,13 @@ void SGTerraSync::bind()
_terraRoot->getNode("use-svn", true)->setAttribute(SGPropertyNode::USERARCHIVE,false);
// stalled is used as a signal handler (to connect listeners triggering GUI pop-ups)
_stalledNode = _terraRoot->getNode("stalled", true);
_stalledNode->setBoolValue(_svnThread->_stalled);
_stalledNode->setBoolValue(_workerThread->_stalled);
_stalledNode->setAttribute(SGPropertyNode::PRESERVE,true);
}
void SGTerraSync::unbind()
{
_svnThread->stop();
_workerThread->stop();
_tiedProperties.Untie();
_bound = false;
_inited = false;
@ -1064,11 +807,11 @@ void SGTerraSync::unbind()
void SGTerraSync::update(double)
{
static SGBucket bucket;
if (_svnThread->isDirty())
if (_workerThread->isDirty())
{
if (!_svnThread->_active)
if (!_workerThread->_active)
{
if (_svnThread->_stalled)
if (_workerThread->_stalled)
{
SG_LOG(SG_TERRASYNC,SG_ALERT,
"Automatic scenery download/synchronization stalled. Too many errors.");
@ -1079,12 +822,12 @@ void SGTerraSync::update(double)
SG_LOG(SG_TERRASYNC,SG_ALERT,
"Automatic scenery download/synchronization has stopped.");
}
_stalledNode->setBoolValue(_svnThread->_stalled);
_stalledNode->setBoolValue(_workerThread->_stalled);
}
while (_svnThread->hasNewTiles())
while (_workerThread->hasNewTiles())
{
SyncItem next = _svnThread->getNewTile();
SyncItem next = _workerThread->getNewTile();
if ((next._type == SyncItem::Tile) || (next._type == SyncItem::AIData)) {
_activeTileDirs.erase(next._dir);
@ -1093,7 +836,7 @@ void SGTerraSync::update(double)
}
}
bool SGTerraSync::isIdle() {return _svnThread->isIdle();}
bool SGTerraSync::isIdle() {return _workerThread->isIdle();}
void SGTerraSync::syncAirportsModels()
{
@ -1106,12 +849,12 @@ void SGTerraSync::syncAirportsModels()
ostringstream dir;
dir << "Airports/" << synced_other;
SyncItem w(dir.str(), SyncItem::AirportData);
_svnThread->request( w );
_workerThread->request( w );
}
}
SyncItem w("Models", SyncItem::SharedModels);
_svnThread->request( w );
_workerThread->request( w );
}
void SGTerraSync::syncAreaByPath(const std::string& aPath)
@ -1126,7 +869,7 @@ void SGTerraSync::syncAreaByPath(const std::string& aPath)
_activeTileDirs.insert(dir);
SyncItem w(dir, SyncItem::Tile);
_svnThread->request( w );
_workerThread->request( w );
}
}
@ -1139,7 +882,7 @@ bool SGTerraSync::scheduleTile(const SGBucket& bucket)
bool SGTerraSync::isTileDirPending(const std::string& sceneryDir) const
{
if (!_svnThread->_running) {
if (!_workerThread->_running) {
return false;
}
@ -1162,13 +905,13 @@ void SGTerraSync::scheduleDataDir(const std::string& dataDir)
_activeTileDirs.insert(dataDir);
SyncItem w(dataDir, SyncItem::AIData);
_svnThread->request( w );
_workerThread->request( w );
}
bool SGTerraSync::isDataDirPending(const std::string& dataDir) const
{
if (!_svnThread->_running) {
if (!_workerThread->_running) {
return false;
}

View File

@ -84,10 +84,10 @@ protected:
void syncAirportsModels();
class SvnThread;
class WorkerThread;
private:
SvnThread* _svnThread;
WorkerThread* _workerThread;
SGPropertyNode_ptr _terraRoot;
SGPropertyNode_ptr _stalledNode;
SGPropertyNode_ptr _cacheHits;