void MapStatsMapper::_writeStats(HadoopPipes::MapContext& context, const MapStats& stats)
{
LOG_INFO("node count: " << _nodeCount);
LOG_INFO("way count: " << _wayCount);
if (stats.isValid())
{
pp::Hdfs fs;
int partition = context.getJobConf()->getInt("mapred.task.partition");
string workDir = context.getJobConf()->get("mapred.work.output.dir");
LOG_INFO("Stats: " << stats.toString());
QString path = QString("%1/part-%2.stats").
arg(QString::fromStdString(workDir)).
arg(partition, 5, 10, QChar('0'));
LOG_INFO("Writing to: " << path);
boost::shared_ptr<ostream> osStats(fs.create(path.toStdString()));
stats.write(*osStats);
}
else
{
LOG_INFO("Stats are not valid.");
}
}
void map(HadoopPipes::MapContext& context) {
std::string line = context.getInputValue();
std::string year = line.substr(15, 4);
std::string airTemperature = line.substr(87, 5);
std::string q = line.substr(92, 1);
if (airTemperature != "+9999" &&
(q == "0" || q == "1" || q == "4" || q == "5" || q == "9")) {
context.emit(year, airTemperature);
}
}
/*
* 1.exec segment usage calc
* 2.emit (segno,seg_usage_text)
*/
void map(HadoopPipes::MapContext& context) {
int ret = 0;
printf("DBG:-- enter func:%s\n",__func__);
const char *segfile = context.getInputKey().data();
printf("DBG:-- key len :%d ,segfile:%s\n",context.getInputValue().size(),segfile);
uint64_t segno = get_segfile_no(segfile);
HADOOP_ASSERT(segfile != NULL, "failed read segfile ");
GHashTable *ss_hashtable = g_hash_table_new_full(g_str_hash,g_str_equal,NULL,NULL);
ret = load_all_snapshot(m_storage,SNAPSHOT_FILE,ss_hashtable);
printf("DBG:-- snapshot loaded\n");
g_assert(ret == 0);
GList* ss_list = NULL;
ret = sort_all_snapshot(ss_hashtable,&ss_list);
printf("DBG:--snapshot sorted\n");
g_assert(ss_list !=NULL);
g_assert(ret == 0);
//struct inode * latest_inode = load_latest_inode(storage);
struct inode * inode=NULL;
char *up_sname;
ret = get_refer_inode_between_snapshots(m_storage,segno,ss_list,&inode,&up_sname);
SEG_USAGE_T seg_usage;
memset(&seg_usage,0,sizeof(SEG_USAGE_T));
if(ret == 0){
printf("DBG:--seg is in snapshots\n");
strncpy(seg_usage.up_sname,up_sname,strlen(up_sname));
ret = seg_usage_calc(m_storage,m_block_size,segno,inode,&seg_usage);
printf("up sname is:%s\n",seg_usage.up_sname);
g_assert(ret ==0);
}
if(ret == 1){
printf("DBG:--seg is on snapshot,do nothing\n");
}
if(ret == 2){
printf("DBG:--seg is above snapshot,maybe need migrate\n");
strncpy(seg_usage.up_sname,EMPTY_UP_SNAPSHOT,strlen(EMPTY_UP_SNAPSHOT));
printf("DBG:--up sname is:%s\n",seg_usage.up_sname);
inode = load_latest_inode(m_storage);
ret = seg_usage_calc(m_storage,m_block_size,segno,inode,&seg_usage);
g_assert(ret ==0);
}
#if 1
string key =string(segfile,strlen(segfile));
char segtextbuf[4096];
uint32_t len = seg_usage2text(&seg_usage,segtextbuf);
printf("DBG:--segtextbuf :%s ..\n",segtextbuf);
string value = string(segtextbuf,len);
printf("DBG:--send segment usage text to reducer ..\n");
context.emit(key,value);
#endif
g_free(seg_usage.bitmap);
}
// map function: receives a line, outputs (word,"1")
// to reducer.
void map( HadoopPipes::MapContext& context ) {
//--- get line of text ---
string line = context.getInputValue();
//--- split it into words ---
vector< string > words =
HadoopUtils::splitString( line, " " );
//--- emit each word tuple (word, "1" ) ---
for ( unsigned int i=0; i < words.size(); i++ ) {
context.emit( words[i], HadoopUtils::toString( 1 ) );
}
}
//map function: receives a line, outputs (byteOffset, upper(line))
//byte offset is monotonically rising, so sorting will be achieved
void map(HadoopPipes::MapContext& context) {
//get line of text
string line = context.getInputValue();
//transform to uppercase
string::iterator it = line.begin();
while (it != line.end()) {
if ('a' <= *it && *it <= 'z') {
*it += 'A' - 'a';
}
++it;
}
//emit
context.emit("", line);
}
void map(HadoopPipes::MapContext& context) {
line = context.getInputValue();
size_t found = line.find_first_of("STN---");
if (found != std::string::npos)
return;
year = DataSet::getYear(line);
airTemperature = DataSet::getMax(line);
if (airTemperature != DataSet::MISSING) {
valStr.str("");
valStr << airTemperature;
context.emit(year, valStr.str());
}
}
void WayJoin1Mapper::_map(shared_ptr<OsmMap>& m, HadoopPipes::MapContext& context)
{
LOG_INFO("Starting map");
string keyStr;
string valueStr;
keyStr.resize(sizeof(int64_t));
int64_t* key = (int64_t*)keyStr.data();
// Remove all non-roads.
m->removeWays(TagFilter(Filter::FilterMatches, "highway", ""));
Debug::printTroubled(m);
// emit the node's ID as the key and x/y as the value.
valueStr.resize(sizeof(ValueNode));
ValueNode* valueNode = (ValueNode*)valueStr.data();
const OsmMap::NodeMap& nm = m->getNodeMap();
for (OsmMap::NodeMap::const_iterator it = nm.constBegin(); it != nm.constEnd(); ++it)
{
const shared_ptr<const Node>& n = it.value();
*key = n->getId();
valueNode->x = n->getX();
valueNode->y = n->getY();
context.emit(keyStr, valueStr);
}
// emit the way's nodes as the key and the way's id as the value.
valueStr.resize(sizeof(ValueWay));
ValueWay* valueWay = (ValueWay*)valueStr.data();
const WayMap& wm = m->getWays();
for (WayMap::const_iterator it = wm.begin(); it != wm.end(); ++it)
{
const shared_ptr<const Way>& w = it->second;
valueWay->id = w->getId();
const std::vector<long>& nids = w->getNodeIds();
for (size_t i = 0; i < nids.size(); i++)
{
*key = nids[i];
context.emit(keyStr, valueStr);
}
}
}
SegUsageCalcReader(HadoopPipes::MapContext& context) {
std::string _filename;
/* FIXIT : hardcore for get segfile name from hadoop proctocol ? */
int16_t mysize = *(int16_t*)context.getInputSplit().data();
_filename = context.getInputSplit().data()+2;
printf("GDB:-- filename :%s sizeof:%d\n",_filename.c_str(),_filename.size());
uint64_t _offset = *(int64_t*)(context.getInputSplit().data()+ 2 +_filename.size());
uint64_t offset = Swap64(_offset);
uint64_t _len = *(int64_t*)(context.getInputSplit().data()+2+_filename.size()+8);
uint64_t len = Swap64(_len);
printf("GDB:-- seg offset:%lld len:%lld\n",offset,len);
std::string filename = _filename.data()+5;
printf("GDB:-- filename :%s sizeof:%d\n",filename.c_str(),filename.size());
if(TRUE!=g_str_has_suffix(filename.c_str(),"seg")){
printf("GDB:-- ignore it \n");
m_bytes_total = m_bytes_read = 0;
return;
}
m_seg_file = g_strdup(g_basename(filename.c_str()));
printf("GDB:-- seg file:%s\n",m_seg_file);
m_bytes_total = len;
m_bytes_read = 0;
}
void WayJoin2Mapper::map(HadoopPipes::MapContext& context)
{
_context = &context;
if (_reader == NULL)
{
HadoopPipes::RecordReader* rr = pp::HadoopPipesUtils::getRecordReader(&context);
_reader = dynamic_cast<WayJoin2RecordReader*>(rr);
if (_reader == NULL)
{
throw InternalErrorException("Expected a record reader of type WayJoin2RecordReader");
}
}
if (_reader->getRecordType() == WayJoin2InputSplit::PbfInputSplitType)
{
mapOsmMap(_reader->getMap());
}
else
{
const string& key = context.getInputKey();
const string& value = context.getInputValue();
if (key.size() != sizeof(int64_t))
{
throw InternalErrorException("Expected key to be a int64_t");
}
if (value.size() != sizeof(WayJoin1Reducer::Value))
{
throw InternalErrorException("Expected value to be a WayJoin1Reducer::Value");
}
int64_t* k = (int64_t*)key.data();
WayJoin1Reducer::Value* v = (WayJoin1Reducer::Value*)value.data();
mapWayPoints(*k, *v);
}
}
void map(HadoopPipes::MapContext& context) {
std::vector<nise::HashEntry> v;
{
std::stringstream ss(context.getInputValue());
nise::ReadVector<nise::HashEntry>(ss, &v);
if (!ss) return;
}
fbi::Hamming hamming;
if (v.size() > nise::MAX_HASH) {
return;
}
for (unsigned i = 0; i < v.size(); ++i) {
for (unsigned j = 0; j < i; ++j) {
if (v[i].second == v[j].second) continue;
if (hamming(v[i].first.sketch, v[j].first.sketch) < nise::SKETCH_DIST_OFFLINE) {
std::string v1(nise::EncodeUint32(v[i].second));
std::string v2(nise::EncodeUint32(v[j].second));
context.emit(v1, v2);
context.emit(v2, v1);
}
}
}
}
void map(HadoopPipes::MapContext& context) {
string line = context.getInputValue();
string year = line.substr(0, 4);
string airTemperature = line.substr(5, 7);
context.emit(year, airTemperature);
}