DRDE/ACTK1_0/session/SessionManagerImpl.cpp

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#include "se/Greeting.hpp"
#include "session/SessionManagerImpl.hpp"
#include "session/SessionPoolImpl.hpp"
#include "session/SessionFactory.hpp"
#include "session/Timer.hpp"
#include "se/ResultCode.hpp"
#include "common/EPPException.hpp"
#include "common/AutoMutex.hpp"
#include "session/SessionManagerProperties.hpp"
#include "session/Transaction.hpp"
#include "session/StatsViewer.hpp"
#include "session/StatsManager.hpp"
#include "session/LoginException.hpp"
#include "common/ErrorPkg.hpp"
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <limits>
#include <typeinfo>
using namespace std;
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//string SessionManagerImpl::pname("biz.meansofproduction.dnseppus.session");
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string SessionManagerImpl::pname("biz.meansofproduction.dnseppus.session");
SessionManagerImpl::SessionManagerImpl(SessionManagerProperties* props)
throw (ConfigurationException)
: state(STOPPED), properties(NULL)
{
debugLogger = Logger::getLogger(pname + ".debug");
userLogger = Logger::getLogger(pname + ".user");
configure(props);
}
SessionManagerImpl::~SessionManagerImpl()
{ }
void SessionManagerImpl::configure(SessionManagerProperties* props)
throw (ConfigurationException)
{
if (props == NULL)
{
throw ConfigurationException("SessionManagerProperties not provided");
}
SessionManagerProperties* prevProperties = properties;
properties = props;
try
{
doConfigure();
}
catch (const EPPException& e)
{
properties = prevProperties;
if (properties != NULL)
{
try
{
doConfigure();
}
catch (EPPException& ee)
{
properties = NULL;
ConfigurationException c("Could not configure the session manager with the previous properties.");
c.causedBy(ee);
throw c;
}
}
ConfigurationException c("Could not configure the session manager.");
c.causedBy(e);
throw c;
}
}
void SessionManagerImpl::doConfigure() throw (EPPException)
{
#if 0
systemSetProperty("EPP.client.messages.dir",
properties->getProperty("EPP.client.messages.dir"));
systemSetProperty("java.util.logging.config.file",
properties->getProperty("java.util.logging.config.file"));
#endif
if (sessionPool.get() != NULL)
{
sessionPool->empty();
}
// Create a new pool that uses the new properties.
sessionPool = auto_ptr<SessionPool>(new SessionPoolImpl(properties));
}
const Greeting* SessionManagerImpl::getLastGreeting() const
throw (SessionConfigurationException, SessionOpenException)
{
try
{
return sessionPool->getLastGreeting();
}
catch (EPPInterruptedException& ie)
{
return NULL;
}
}
void SessionManagerImpl::startup()
throw (SessionConfigurationException,
SessionOpenException)
{
userLogger->info ("startup");
int failCount = 0;
bool initialised = false;
while (!initialised)
{
try
{
sessionPool->init();
initialised = true;
state = STARTED;
}
catch (const EPPInterruptedException &ie)
{
failCount++;
userLogger->severe(ErrorPkg::getMessage("startup.interrupted"));
}
catch (const LoginException& le)
{
try
{
dynamic_cast<CommandFailedException *>(le.getCause());
if (failCount < MAX_ACCEPTABLE_FAIL_COUNT)
{
// Try again.
failCount++;
continue;
}
}
catch (bad_cast&)
{ }
throw;
}
}
}
namespace {
// Little helper to ensure a session is released back into the pool upon
// destruction of this object.
//
class SessionHandle
{
public:
SessionHandle(SessionPool& pool, Session* session)
: _pool(pool), _sess(session)
{ }
~SessionHandle() { _pool.releaseSession(_sess); }
Session& session() { return *_sess; }
private:
SessionPool& _pool;
Session* _sess;
};
} // anonymous namespace
void SessionManagerImpl::execute(Transaction& tx)
throw (FatalSessionException, EPPIOException, ParsingException,
CommandFailedException, IllegalStateException)
{
debugLogger->LOG_FINEST("enter");
if (state == STOPPED)
{
throw IllegalStateException(
"Can not execute a command because the session "
"manager is not started.");
}
Command& cmd = *(tx.getCommand());
Response& response = *(tx.getResponse());
int failCount = 0;
bool isExecuted = false;
while (!isExecuted && state != STOPPED)
{
try
{
SessionHandle sh(*sessionPool, sessionPool->getSession(cmd.getCommandType()));
StatsManager* statsManager = sh.session().getStatsManager();
statsManager->incCommandCounter(cmd.getCommandType());
sh.session().write(cmd);
isExecuted = true;
sh.session().read(response);
tx.setState(Transaction::PROCESSED);
const vector<Result>& results(response.getResults());
for (vector<Result>::const_iterator result_iter = results.begin();
result_iter != results.end(); ++result_iter)
{
int code = result_iter->getResultCode();
statsManager->incResultCounter(code);
if (code == ResultCode::CMD_FAILED
|| code == ResultCode::CMD_FAILED_CLOSING)
{
throw CommandFailedException();
}
}
}
catch (CommandFailedException& cfe)
{
userLogger->LOG_WARNING(cfe.getMessage());
if (state != STOPPED && failCount < MAX_ACCEPTABLE_FAIL_COUNT)
{
failCount++;
}
else throw;
}
catch (EPPIOException& e)
{
userLogger->LOG_WARNING(e.getMessage());
userLogger->LOG_WARNING(ErrorPkg::getMessage("net.socket.closed"));
if (state != STOPPED && failCount < MAX_ACCEPTABLE_FAIL_COUNT)
{
failCount++;
}
else
{
throw;
}
}
catch (SessionConfigurationException& sce)
{
FatalSessionException fe;
fe.causedBy(sce);
throw fe;
}
catch (SessionOpenException& soe)
{
FatalSessionException fe;
fe.causedBy(soe);
throw fe;
}
// Session release managed by handle class.
}
if (!isExecuted && state == STOPPED)
{
throw IllegalStateException("Illegal state");
}
debugLogger->LOG_FINEST("exit");
}
namespace {
// Attempt transmission of each the transactions in txs, setting the transation
// state to fatal or retry if there is an error. If an OI error is encountered,
// the session is closed and EPPIOException is thrown.
// Quirk: This does not send the first entry in the array as it assumed to
// already have been used to decide whether 'session' is in a good state.
void send(vector<Transaction>& txs, Session& session, StatsManager& statsManager, Logger* userLogger)
throw (EPPIOException)
{
typedef vector<Transaction>::iterator iter;
iter tx = txs.begin();
tx++; // skip first entry
for (; tx != txs.end(); ++tx)
{
const Transaction::State state(tx->getState());
if (! (state == Transaction::UNPROCESSED || state == Transaction::RETRY))
continue;
try
{
Command& command = *(tx->getCommand());
session.write(command);
statsManager.incCommandCounter(command.getCommandType());
}
catch (ParsingException& pe)
{
userLogger->warning(pe.getMessage());
tx->setState(Transaction::FATAL_ERROR);
tx->setCause(pe);
// This transaction has not been sent, so it is okay to skip this
// item and try the next one.
}
catch (EPPIOException& ioe)
{
userLogger->severe(ioe.getMessage());
tx->setState(Transaction::RETRY);
tx->setCause(ioe);
// This session is toast.
session.close();
throw;
}
}
}
// Attempt to receive the responses to the previously sent commands.
// Already processed commands or 'fatal' error'd transactions are skipped, but
// the former count as successfully sent for this batch of receives. Returns
// the offset of the first un-successfully transmitted item.
//
int receive(vector<Transaction>& txs, Session& session,
StatsManager& statsManager, Logger* userLogger)
{
typedef vector<Transaction> Trans;
Trans::size_type firstFailed = numeric_limits<int>::max();
for (Trans::size_type i = 0; i < txs.size(); ++i)
{
switch (txs[i].getState())
{
case Transaction::PROCESSED:
// Already received.
continue;
case Transaction::FATAL_ERROR:
// Skip this as it was not sent.
firstFailed = std::min(i, firstFailed);
continue;
default:
;
// Let's process this one because it is either unprocessed or
// retry-able.
}
try
{
session.read(*(txs[i].getResponse()));
txs[i].setState(Transaction::PROCESSED);
}
catch (ParsingException& pe)
{
userLogger->warning(pe.getMessage());
txs[i].setState(Transaction::FATAL_ERROR);
txs[i].setCause(pe);
// We can't trust that the message boundaries will be correct
// following a parsing error, so the session must be closed in
// order to prevent incorrect interpretation of further service
// elements received via this session. We also stop processing.
session.close();
return min(i, firstFailed);
} catch (EPPIOException& ioe) {
userLogger->warning(ioe.getMessage());
txs[i].setState(Transaction::RETRY);
txs[i].setCause(ioe);
return min(i, firstFailed);
}
}
return txs.size();
}
} // anonymous namespace
int SessionManagerImpl::execute(vector<Transaction>& txs)
throw (FatalSessionException, IllegalStateException)
{
debugLogger->LOG_FINEST("enter");
if (txs.size() == 0) return 0;
debugLogger->LOG_FINEST("size > 0");
if (state == STOPPED)
{
throw IllegalStateException("Session manager is not started.");
}
debugLogger->LOG_FINEST("state != STOPPED");
// When pipelining commands, a single session must be used for all
// transactions to guarantee the correct command sequence.
int firstFailedTrans = 0;
SessionHandle sh(*sessionPool, sendCommandAndGetSession(txs));
try
{
StatsManager* statsManager = sh.session().getStatsManager();
send(txs, sh.session(), *statsManager, userLogger);
firstFailedTrans = receive(txs, sh.session(), *statsManager, userLogger);
}
catch (EPPIOException& e)
{
// Only send can throw EPPIOException, so none of the transactions worked,
// so return the offset to the 1st.
return 0;
}
debugLogger->LOG_FINEST("exit");
return firstFailedTrans;
}
void SessionManagerImpl::shutdown()
{
debugLogger->LOG_FINEST("enter");
userLogger->LOG_INFO("Initiating shutdown");
SMState tmpState = state;
if (tmpState == RUNNING)
{
debugLogger->LOG_INFO("state == RUNNING");
state = STARTED;
debugLogger->LOG_INFO("state == STARTED");
pthread_cond_signal(&shutdown_condition);
debugLogger->LOG_INFO("Joining keep-alive thread");
pthread_join(run_thread_id, NULL);
debugLogger->LOG_INFO("Joined keep-alive thread");
pthread_mutex_destroy(&run_mutex);
pthread_cond_destroy(&shutdown_condition);
}
if (tmpState == STARTED)
{
debugLogger->LOG_INFO("state == STARTED");
sessionPool->empty();
state = STOPPED;
}
debugLogger->LOG_INFO("state == STOPPED");
userLogger->LOG_INFO("Shutdown complete");
debugLogger->LOG_FINEST("exit");
}
void *SessionManagerImpl::doRun(void *myobj)
{
static_cast<SessionManagerImpl*>(myobj)->threadMain();
return NULL;
}
void SessionManagerImpl::run() {
if (state != STARTED)
return;
pthread_mutex_init(&run_mutex, NULL);
pthread_cond_init(&shutdown_condition, NULL);
pthread_attr_t *attrs = NULL;
void *args = this;
int result = pthread_create(
&run_thread_id,
attrs,
&SessionManagerImpl::doRun,
(void *) args);
if (result) {
state = STARTED;
userLogger->LOG_WARNING("Failed to create keep-alive thread: "
+ errno);
}
}
/**
* @return If the condition was not signalled during the wait period, thus resulting in
* a timeout, then
*/
int SessionManagerImpl::waitForInterrupt(struct timespec awakenTime)
{
int res;
int err;
{
AutoMutex lock(&run_mutex);
res = pthread_cond_timedwait(
&shutdown_condition, &run_mutex, &awakenTime);
err = errno;
}
if (res)
return err;
return 0;
}
void SessionManagerImpl::threadMain(void)
{
debugLogger->LOG_FINEST("enter");
state = RUNNING;
while (state == RUNNING)
{
long sleepInterval = sessionPool->keepAlive();
struct timespec wakeTime(Timer::msOffset2abs(sleepInterval));
bool interrupted = false;
int retry = 0;
int maxRetries = MAX_SLEEP_INTERRUPTS_TO_FAIL;
// sleep for at least 'sleepInterval' milliseconds, taking into
// account interruptions.
do
{
retry++;
if (sleepInterval > 0)
{
//long sleepStart = Timer::now();
int waitCode = waitForInterrupt(wakeTime);
if (waitCode == ETIMEDOUT)
interrupted = false;
else if (waitCode == EINVAL)
{
userLogger->LOG_WARNING(
"Out of range value for sleep: "
+ sleepInterval/1000);
break;
}
else if (waitCode == EPERM)
{
}
else if (waitCode == 0)
{
interrupted = true;
}
else {
userLogger->LOG_WARNING(
"Unexpected return value from waitForInterrupt: "
+ waitCode);
break;
}
}
}
while (interrupted && retry < maxRetries && state == RUNNING);
}
debugLogger->LOG_FINEST("exit");
return;
}
void SessionManagerImpl::changePassword(
const string& oldPassword, const string& newPassword)
{
debugLogger->LOG_FINEST("enter");
if (userLogger->enabled(Logger::FINE))
{
vector<string> args;
args.push_back("<<old>>");
args.push_back("<<new>>");
vector<string> vals;
vals.push_back(oldPassword);
vals.push_back(newPassword);
userLogger->LOG_FINE(
ErrorPkg::getMessage("reconfigure.pw.change.init", args, vals));
}
sessionPool->empty();
try
{
auto_ptr<Session> session(SessionFactory::newInstance(properties));
session->changePassword(newPassword);
userLogger->LOG_INFO(ErrorPkg::getMessage("reconfigure.pw.change.complete"));
properties->setClientPW(newPassword);
sessionPool = auto_ptr<SessionPool>(new SessionPoolImpl(properties));
try
{
sessionPool->init();
}
catch (EPPException& e)
{
userLogger->LOG_SEVERE(e.getMessage());
userLogger->LOG_SEVERE(ErrorPkg::getMessage("reconfigure.pw.change.reinit.fail"));
throw;
}
}
catch (EPPException& ex)
{
userLogger->LOG_SEVERE(ex.getMessage());
userLogger->LOG_SEVERE(ErrorPkg::getMessage("reconfigure.pw.change.fail"));
throw;
}
debugLogger->LOG_FINEST("exit");
}
const StatsViewer& SessionManagerImpl::getStatsViewer() const
{
return sessionPool->getStatsViewer();
}
// This will either return an 'acquired' Session, or will throw an exception.
// txs must contain at least one Transaction.
Session* SessionManagerImpl::sendCommandAndGetSession(vector<Transaction>& txs)
throw (FatalSessionException, IllegalStateException)
{
debugLogger->LOG_FINEST("enter");
Session* session = NULL;
Command& command = *(txs[0].getCommand());
int failCount = 0;
while (state != STOPPED)
{
try
{
// session = sessionPool->getSession(txs);
session = sessionPool->getSession();
try
{
std::string xml = command.toXML();
session->write(command);
session->getStatsManager()->incCommandCounter(command.getCommandType());
}
catch (ParsingException& e)
{
// We got the session, tried to use it, but there was a
// problem. We assume that the packet-length preamble
// was not at fault (if this assumption is false, expect all
// following packets from this session to be invalid).
txs[0].setState(Transaction::FATAL_ERROR);
txs[0].setCause(e);
}
return session;
}
catch (EPPIOException& ioe)
{
sessionPool->releaseSession(session);
if (++failCount > MAX_ACCEPTABLE_FAIL_COUNT)
{
FatalSessionException fse;
fse.causedBy(ioe);
throw fse;
}
}
catch (EPPInterruptedException& ie)
{
// Release and try again while 'running'.
sessionPool->releaseSession(session);
userLogger->LOG_WARNING(ie.getMessage());
}
catch (SessionConfigurationException& sce)
{
sessionPool->releaseSession(session);
FatalSessionException fse;
fse.causedBy(sce);
throw fse;
}
catch (SessionOpenException& soe)
{
sessionPool->releaseSession(session);
FatalSessionException fse;
fse.causedBy(soe);
throw fse;
}
}
throw IllegalStateException(
"Can not execute command on a session because the session "
"manager is not started.");
}