XrdAdaptor::Source Class Reference

#include <XrdSource.h>

Inheritance diagram for XrdAdaptor::Source:

Public Member Functions
const std::string &	ExcludeID () const
std::shared_ptr< XrdCl::File >	getFileHandle ()
struct timespec	getLastDowngrade () const
unsigned	getQuality ()
void	handle (std::shared_ptr< ClientRequest >)
void	handle (RequestList &)
const std::string &	ID () const
Source &	operator= (const Source &)=delete
const std::string &	PrettyID () const
void	setLastDowngrade (struct timespec now)
const std::string &	Site () const
	Source (const Source &)=delete
	Source (timespec now, std::unique_ptr< XrdCl::File > fileHandle, const std::string &exclude)
	~Source ()

Static Public Member Functions
static void	determineHostExcludeString (XrdCl::File &file, const XrdCl::HostList *hostList, std::string &exclude)
static bool	getDomain (const std::string &host, std::string &domain)
static bool	getHostname (const std::string &id, std::string &hostname)
static bool	getXrootdSite (XrdCl::File &file, std::string &site)
static bool	getXrootdSiteFromURL (std::string url, std::string &site)
static bool	isDCachePool (XrdCl::File &file, const XrdCl::HostList *hostList=nullptr)
static bool	isDCachePool (const std::string &url)

Private Member Functions
std::shared_ptr< XrdCl::File const >	fh () const
std::shared_ptr< XrdCl::File > &	fh ()
void	requestCallback ()
void	setXrootdSite ()
std::shared_ptr < XrdSiteStatistics const >	stats () const
std::shared_ptr < XrdSiteStatistics > &	stats ()

Private Attributes
std::string	m_exclude
edm::propagate_const < std::shared_ptr< XrdCl::File > >	m_fh
std::string	m_id
struct timespec	m_lastDowngrade
std::string	m_prettyid
edm::propagate_const < std::unique_ptr < QualityMetricSource > >	m_qm
std::string	m_site
edm::propagate_const < std::shared_ptr < XrdSiteStatistics > >	m_stats

Detailed Description

Definition at line 23 of file XrdSource.h.

Constructor & Destructor Documentation

XrdAdaptor::Source::Source ( const Source &  )

delete

Source::Source	(	timespec	now,
		std::unique_ptr< XrdCl::File >	fileHandle,
		const std::string &	exclude
	)

Definition at line 181 of file XrdSource.cc.

    : m_lastDowngrade({0, 0}),

Source::~Source

(

)

Definition at line 366 of file XrdSource.cc.

References fh(), m_id, and m_site.

{ new DelayedClose(fh(), m_id, m_site); }

Member Function Documentation

void Source::determineHostExcludeString ( XrdCl::File &  file, const XrdCl::HostList *  hostList, std::string &  exclude  )

static

Definition at line 288 of file XrdSource.cc.

References info(), isDCachePool(), and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by XrdAdaptor::RequestManager::OpenHandler::HandleResponseWithHosts(), and XrdAdaptor::RequestManager::initialize().

                                                                                                          {
  // Detect a dCache pool and, if we are in the federation context, give a custom
  // exclude parameter.
  // We assume this is a federation context if there's at least a regional, dCache door,
  // and dCache pool server (so, more than 2 servers!).

  exclude = "";
  if (hostList && (hostList->size() > 3) && isDCachePool(file, hostList)) {
    const XrdCl::HostInfo &info = (*hostList)[hostList->size() - 3];
    exclude = info.url.GetHostName();
    std::string lastUrl;
    file.GetProperty("LastURL", lastUrl);
    edm::LogVerbatim("XrdAdaptorInternal") << "Changing exclude list for URL " << lastUrl << " to " << exclude;
  }
}

const std::string& XrdAdaptor::Source::ExcludeID ( ) const

inline

Definition at line 41 of file XrdSource.h.

References m_exclude.

{ return m_exclude; }

std::shared_ptr<XrdCl::File const> XrdAdaptor::Source::fh ( ) const

inlineprivate

Definition at line 71 of file XrdSource.h.

References edm::get_underlying_safe(), and m_fh.

Referenced by getFileHandle(), and ~Source().

{ return get_underlying_safe(m_fh); }

std::shared_ptr<XrdCl::File>& XrdAdaptor::Source::fh ( )

inlineprivate

Definition at line 72 of file XrdSource.h.

References edm::get_underlying_safe(), and m_fh.

{ return get_underlying_safe(m_fh); }

bool Source::getDomain ( const std::string &  host, std::string &  domain  )

static

Definition at line 246 of file XrdSource.cc.

References getHostname().

Referenced by getXrootdSite(), getXrootdSiteFromURL(), and XrdAdaptor::RequestManager::initialize().

                                                               {
  getHostname(host, domain);
  size_t pos = domain.find('.');
  if (pos != std::string::npos && (pos < domain.size())) {
    domain = domain.substr(pos + 1);
  }

  return !domain.empty();
}

std::shared_ptr< XrdCl::File > Source::getFileHandle

(

)

Definition at line 368 of file XrdSource.cc.

References fh().

{ return fh(); }

bool Source::getHostname ( const std::string &  id, std::string &  hostname  )

static

Definition at line 219 of file XrdSource.cc.

References query::host, gpuClustering::id, and mps_fire::result.

Referenced by getDomain(), XrdAdaptor::RequestManager::initialize(), and XrdAdaptor::RequestManager::queueUpdateCurrentServer().

                                                                 {
  size_t pos = id.find(':');
  hostname = id;
  if ((pos != std::string::npos) && (pos > 0)) {
    hostname = id.substr(0, pos);
  }

  bool retval = true;
  if (!hostname.empty() && ((hostname[0] == '[') || isdigit(hostname[0]))) {
    retval = false;
    struct addrinfo hints;
    memset(&hints, 0, sizeof(struct addrinfo));
    hints.ai_family = AF_UNSPEC;
    struct addrinfo *result;
    if (!getaddrinfo(hostname.c_str(), nullptr, &hints, &result)) {
      std::vector<char> host;
      host.reserve(256);
      if (!getnameinfo(result->ai_addr, result->ai_addrlen, &host[0], 255, nullptr, 0, NI_NAMEREQD)) {
        hostname = &host[0];
        retval = true;
      }
      freeaddrinfo(result);
    }
  }
  return retval;
}

struct timespec XrdAdaptor::Source::getLastDowngrade ( ) const

inline

Definition at line 45 of file XrdSource.h.

References m_lastDowngrade.

                                             {
      return m_lastDowngrade;
    }

unsigned XrdAdaptor::Source::getQuality ( )

inline

Definition at line 43 of file XrdSource.h.

References m_qm.

{ return m_qm->get(); }

bool Source::getXrootdSite ( XrdCl::File &  file, std::string &  site  )

static

Definition at line 304 of file XrdSource.cc.

References getDomain(), getXrootdSiteFromURL(), gpuClustering::id, isDCachePool(), contentValuesFiles::server, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by setXrootdSite().

                                                         {
  std::string lastUrl;
  fh.GetProperty("LastURL", lastUrl);
  if (lastUrl.empty() || isDCachePool(lastUrl)) {
    std::string server, id;
    if (!fh.GetProperty("DataServer", server)) {
      id = "(unknown)";
    } else {
      id = server;
    }
    if (lastUrl.empty()) {
      edm::LogWarning("XrdFileWarning") << "Unable to determine the URL associated with server " << id;
    }
    site = "Unknown";
    if (!server.empty()) {
      getDomain(server, site);
    }
    return false;
  }
  return getXrootdSiteFromURL(lastUrl, site);
}

bool Source::getXrootdSiteFromURL ( std::string  url, std::string &  site  )

static

Definition at line 326 of file XrdSource.cc.

References getDomain(), QueryAttrHandler::query(), uploadConditions::response, seconds(), AlCaHLTBitMon_QueryRunRegistry::string, and hcal_runs::URL.

Referenced by getXrootdSite(), and XrdAdaptor::RequestManager::initialize().

                                                                {
  const std::string attr = "sitename";
  XrdCl::Buffer *response = nullptr;
  XrdCl::Buffer arg(attr.size());
  arg.FromString(attr);

  XrdCl::FileSystem fs(url);
  std::string rsite;
  XrdCl::XRootDStatus st = QueryAttrHandler::query(fs, "sitename", std::chrono::seconds(1), rsite);
  if (!st.IsOK()) {
    XrdCl::URL xurl(url);
    getDomain(xurl.GetHostName(), site);
    delete response;
    return false;
  }
  if (!rsite.empty() && (rsite[rsite.size() - 1] == '\n')) {
    rsite = rsite.substr(0, rsite.size() - 1);
  }
  if (rsite == "sitename") {
    XrdCl::URL xurl(url);
    getDomain(xurl.GetHostName(), site);
    return false;
  }
  site = rsite;
  return true;
}

void Source::handle

(

std::shared_ptr< ClientRequest >

c

)

Definition at line 382 of file XrdSource.cc.

References cms::Exception::addContext(), c, haddnano::cl, edm::errors::FileReadError, ID(), m_fh, m_qm, m_stats, XrdAdaptor::XrdSiteStatistics::startRead(), stats(), mps_update::status, and validateList().

                                                  {
  edm::LogVerbatim("XrdAdaptorInternal") << "Reading from " << ID() << ", quality " << m_qm->get() << std::endl;
  c->m_source = shared_from_this();
  c->m_self_reference = c;
  m_qm->startWatch(c->m_qmw);
  if (m_stats) {
    std::shared_ptr<XrdReadStatistics> readStats = XrdSiteStatistics::startRead(stats(), c);
    c->setStatistics(readStats);
  }
#ifdef XRD_FAKE_SLOW
  if (m_slow)
    std::this_thread::sleep_for(std::chrono::milliseconds(XRD_DELAY));
#endif

  XrdCl::XRootDStatus status;
  if (c->m_into) {
    // See notes in ClientRequest definition to understand this voodoo.
    status = m_fh->Read(c->m_off, c->m_size, c->m_into, c.get());
  } else {
    XrdCl::ChunkList cl;
    cl.reserve(c->m_iolist->size());
    for (const auto &it : *c->m_iolist) {
      cl.emplace_back(it.offset(), it.size(), it.data());
    }
    validateList(cl);
    status = m_fh->VectorRead(cl, nullptr, c.get());
  }

  if (!status.IsOK()) {
    edm::Exception ex(edm::errors::FileReadError);
    ex << "XrdFile::Read or XrdFile::VectorRead failed with error: '" << status.ToStr() << "' (errNo = " << status.errNo
       << ")";
    ex.addContext("Calling Source::handle");
    throw ex;
  }
}

void XrdAdaptor::Source::handle

(

RequestList &

)

const std::string& XrdAdaptor::Source::ID ( ) const

inline

Definition at line 38 of file XrdSource.h.

References m_id.

Referenced by handle().

{ return m_id; }

bool Source::isDCachePool ( XrdCl::File &  file, const XrdCl::HostList *  hostList = nullptr  )

static

Definition at line 256 of file XrdSource.cc.

References mps_fire::result, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by determineHostExcludeString(), getXrootdSite(), and SendMonitoringInfo().

                                                                        {
  // WORKAROUND: On open-file recovery in the Xrootd client, it'll carry around the
  // dCache opaque information to other sites, causing isDCachePool to erroneously return
  // true.  We are working with the upstream developers to solve this.
  //
  // For now, we see if the previous server also looks like a dCache pool - something that
  // wouldn't happen at a real site, as the previous server should look like a dCache door.
  std::string lastUrl;
  file.GetProperty("LastURL", lastUrl);
  if (!lastUrl.empty()) {
    bool result = isDCachePool(lastUrl);
    if (result && hostList && (hostList->size() > 1)) {
      if (isDCachePool((*hostList)[hostList->size() - 2].url.GetURL())) {
        return false;
      }
      return true;
    }
    return result;
  }
  return false;
}

bool Source::isDCachePool ( const std::string &  url )

static

Definition at line 278 of file XrdSource.cc.

References hcal_runs::URL, and relmon_authenticated_wget::url.

                                                  {
  XrdCl::URL url(lastUrl);
  XrdCl::URL::ParamsMap map = url.GetParams();
  // dCache pools always utilize this opaque identifier.
  if (map.find("org.dcache.uuid") != map.end()) {
    return true;
  }
  return false;
}

Source& XrdAdaptor::Source::operator= ( const Source &  )

delete

const std::string& XrdAdaptor::Source::PrettyID ( ) const

inline

Definition at line 40 of file XrdSource.h.

References m_prettyid.

Referenced by XrdAdaptor::ClientRequest::HandleResponse().

{ return m_prettyid; }

void XrdAdaptor::Source::requestCallback ( )

private

void XrdAdaptor::Source::setLastDowngrade ( struct timespec  now )

inline

Definition at line 48 of file XrdSource.h.

References m_lastDowngrade, and submitPVValidationJobs::now.

{ m_lastDowngrade = now; }

void Source::setXrootdSite ( )

private

Definition at line 353 of file XrdSource.cc.

References getXrootdSite(), m_fh, m_id, m_prettyid, m_site, and AlCaHLTBitMon_QueryRunRegistry::string.

                           {
  std::string site;
  bool goodSitename = getXrootdSite(*m_fh, site);
  if (!goodSitename) {
    edm::LogInfo("XrdAdaptorInternal") << "Xrootd server at " << m_id
                                       << " did not provide a sitename.  Monitoring may be incomplete.";
  } else {
    m_site = site;
    m_prettyid = m_id + " (site " + m_site + ")";
  }
  edm::LogInfo("XrdAdaptorInternal") << "Reading from new server " << m_id << " at site " << m_site;
}

const std::string& XrdAdaptor::Source::Site ( ) const

inline

Definition at line 39 of file XrdSource.h.

References m_site.

{ return m_site; }

std::shared_ptr<XrdSiteStatistics const> XrdAdaptor::Source::stats ( ) const

inlineprivate

Definition at line 73 of file XrdSource.h.

References edm::get_underlying_safe(), and m_stats.

Referenced by handle().

{ return get_underlying_safe(m_stats); }

std::shared_ptr<XrdSiteStatistics>& XrdAdaptor::Source::stats ( )

inlineprivate

Definition at line 74 of file XrdSource.h.

References edm::get_underlying_safe(), and m_stats.

{ return get_underlying_safe(m_stats); }

Member Data Documentation

std::string XrdAdaptor::Source::m_exclude

private

Definition at line 80 of file XrdSource.h.

Referenced by ExcludeID().

edm::propagate_const<std::shared_ptr<XrdCl::File> > XrdAdaptor::Source::m_fh

private

Definition at line 81 of file XrdSource.h.

Referenced by fh(), handle(), and setXrootdSite().

std::string XrdAdaptor::Source::m_id

private

Definition at line 77 of file XrdSource.h.

Referenced by ID(), setXrootdSite(), and ~Source().

struct timespec XrdAdaptor::Source::m_lastDowngrade

private

Definition at line 76 of file XrdSource.h.

Referenced by getLastDowngrade(), and setLastDowngrade().

std::string XrdAdaptor::Source::m_prettyid

private

Definition at line 78 of file XrdSource.h.

Referenced by PrettyID(), and setXrootdSite().

edm::propagate_const<std::unique_ptr<QualityMetricSource> > XrdAdaptor::Source::m_qm

private

Definition at line 83 of file XrdSource.h.

Referenced by getQuality(), and handle().

std::string XrdAdaptor::Source::m_site

private

Definition at line 79 of file XrdSource.h.

Referenced by setXrootdSite(), Site(), and ~Source().

edm::propagate_const<std::shared_ptr<XrdSiteStatistics> > XrdAdaptor::Source::m_stats

private

Definition at line 84 of file XrdSource.h.

Referenced by handle(), and stats().