本文整理汇总了C++中OplogReader::putBack方法的典型用法代码示例。如果您正苦于以下问题：C++ OplogReader::putBack方法的具体用法？C++ OplogReader::putBack怎么用？C++ OplogReader::putBack使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类OplogReader的用法示例。
在下文中一共展示了OplogReader::putBack方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: initialSyncOplogApplication
/* initial oplog application, during initial sync, after cloning.
@return false on failure.
this method returns an error and doesn't throw exceptions (i think).
*/
bool ReplSetImpl::initialSyncOplogApplication(
const Member *source,
OpTime applyGTE,
OpTime minValid)
{
if( source == 0 ) return false;
const string hn = source->h().toString();
OpTime ts;
try {
OplogReader r;
if( !r.connect(hn) ) {
log() << "replSet initial sync error can't connect to " << hn << " to read " << rsoplog << rsLog;
return false;
}
{
BSONObjBuilder q;
q.appendDate("$gte", applyGTE.asDate());
BSONObjBuilder query;
query.append("ts", q.done());
BSONObj queryObj = query.done();
r.query(rsoplog, queryObj);
}
assert( r.haveCursor() );
/* we lock outside the loop to avoid the overhead of locking on every operation. server isn't usable yet anyway! */
writelock lk("");
{
if( !r.more() ) {
sethbmsg("replSet initial sync error reading remote oplog");
log() << "replSet initial sync error remote oplog (" << rsoplog << ") on host " << hn << " is empty?" << rsLog;
return false;
}
bo op = r.next();
OpTime t = op["ts"]._opTime();
r.putBack(op);
if( op.firstElement().fieldName() == string("$err") ) {
log() << "replSet initial sync error querying " << rsoplog << " on " << hn << " : " << op.toString() << rsLog;
return false;
}
uassert( 13508 , str::stream() << "no 'ts' in first op in oplog: " << op , !t.isNull() );
if( t > applyGTE ) {
sethbmsg(str::stream() << "error " << hn << " oplog wrapped during initial sync");
log() << "replSet initial sync expected first optime of " << applyGTE << rsLog;
log() << "replSet initial sync but received a first optime of " << t << " from " << hn << rsLog;
return false;
}
}
// todo : use exhaust
unsigned long long n = 0;
while( 1 ) {
if( !r.more() )
break;
BSONObj o = r.nextSafe(); /* note we might get "not master" at some point */
{
ts = o["ts"]._opTime();
/* if we have become primary, we dont' want to apply things from elsewhere
anymore. assumePrimary is in the db lock so we are safe as long as
we check after we locked above. */
if( (source->state() != MemberState::RS_PRIMARY &&
source->state() != MemberState::RS_SECONDARY) ||
replSetForceInitialSyncFailure ) {
int f = replSetForceInitialSyncFailure;
if( f > 0 ) {
replSetForceInitialSyncFailure = f-1;
log() << "replSet test code invoked, replSetForceInitialSyncFailure" << rsLog;
throw DBException("forced error",0);
}
log() << "replSet we are now primary" << rsLog;
throw DBException("primary changed",0);
}
if( ts >= applyGTE ) {
// optimes before we started copying need not be applied.
syncApply(o);
}
_logOpObjRS(o); /* with repl sets we write the ops to our oplog too */
}
if( ++n % 100000 == 0 ) {
// simple progress metering
log() << "replSet initialSyncOplogApplication " << n << rsLog;
}
}
}
catch(DBException& e) {
if( ts <= minValid ) {
// didn't make it far enough
log() << "replSet initial sync failing, error applying oplog " << e.toString() << rsLog;
//.........这里部分代码省略.........
示例2: lk
bool replset::InitialSync::oplogApplication(OplogReader& r, const Member* source,
const OpTime& applyGTE, const OpTime& minValid) {
const string hn = source->fullName();
try {
r.tailingQueryGTE( rsoplog, applyGTE );
if ( !r.haveCursor() ) {
log() << "replSet initial sync oplog query error" << rsLog;
return false;
}
{
if( !r.more() ) {
sethbmsg("replSet initial sync error reading remote oplog");
log() << "replSet initial sync error remote oplog (" << rsoplog << ") on host " << hn << " is empty?" << rsLog;
return false;
}
bo op = r.next();
OpTime t = op["ts"]._opTime();
r.putBack(op);
if( op.firstElementFieldName() == string("$err") ) {
log() << "replSet initial sync error querying " << rsoplog << " on " << hn << " : " << op.toString() << rsLog;
return false;
}
uassert( 13508 , str::stream() << "no 'ts' in first op in oplog: " << op , !t.isNull() );
if( t > applyGTE ) {
sethbmsg(str::stream() << "error " << hn << " oplog wrapped during initial sync");
log() << "replSet initial sync expected first optime of " << applyGTE << rsLog;
log() << "replSet initial sync but received a first optime of " << t << " from " << hn << rsLog;
return false;
}
sethbmsg(str::stream() << "initial oplog application from " << hn << " starting at "
<< t.toStringPretty() << " to " << minValid.toStringPretty());
}
}
catch(DBException& e) {
log() << "replSet initial sync failing: " << e.toString() << rsLog;
return false;
}
/* we lock outside the loop to avoid the overhead of locking on every operation. */
writelock lk("");
// todo : use exhaust
OpTime ts;
time_t start = time(0);
unsigned long long n = 0;
int fails = 0;
while( ts < minValid ) {
try {
// There are some special cases with initial sync (see the catch block), so we
// don't want to break out of this while until we've reached minvalid. Thus, we'll
// keep trying to requery.
if( !r.more() ) {
OCCASIONALLY log() << "replSet initial sync oplog: no more records" << endl;
sleepsecs(1);
r.resetCursor();
r.tailingQueryGTE(rsoplog, theReplSet->lastOpTimeWritten);
if ( !r.haveCursor() ) {
if (fails++ > 30) {
log() << "replSet initial sync tried to query oplog 30 times, giving up" << endl;
return false;
}
}
continue;
}
BSONObj o = r.nextSafe(); /* note we might get "not master" at some point */
ts = o["ts"]._opTime();
{
if( (source->state() != MemberState::RS_PRIMARY &&
source->state() != MemberState::RS_SECONDARY) ||
replSetForceInitialSyncFailure ) {
int f = replSetForceInitialSyncFailure;
if( f > 0 ) {
replSetForceInitialSyncFailure = f-1;
log() << "replSet test code invoked, replSetForceInitialSyncFailure" << rsLog;
throw DBException("forced error",0);
}
log() << "replSet we are now primary" << rsLog;
throw DBException("primary changed",0);
}
applyOp(o, applyGTE);
}
if ( ++n % 1000 == 0 ) {
time_t now = time(0);
if (now - start > 10) {
// simple progress metering
log() << "replSet initialSyncOplogApplication applied " << n << " operations, synced to "
<< ts.toStringPretty() << rsLog;
start = now;
//.........这里部分代码省略.........
示例3: _initialSyncOplogApplication
bool ReplSetImpl::_initialSyncOplogApplication(OplogReader& r, const Member *source,
const OpTime& applyGTE, const OpTime& minValid) {
const string hn = source->fullName();
OplogReader missingObjReader;
try {
r.tailingQueryGTE( rsoplog, applyGTE );
if ( !r.haveCursor() ) {
log() << "replSet initial sync oplog query error" << rsLog;
return false;
}
{
if( !r.more() ) {
sethbmsg("replSet initial sync error reading remote oplog");
log() << "replSet initial sync error remote oplog (" << rsoplog << ") on host " << hn << " is empty?" << rsLog;
return false;
}
bo op = r.next();
OpTime t = op["ts"]._opTime();
r.putBack(op);
if( op.firstElementFieldName() == string("$err") ) {
log() << "replSet initial sync error querying " << rsoplog << " on " << hn << " : " << op.toString() << rsLog;
return false;
}
uassert( 13508 , str::stream() << "no 'ts' in first op in oplog: " << op , !t.isNull() );
if( t > applyGTE ) {
sethbmsg(str::stream() << "error " << hn << " oplog wrapped during initial sync");
log() << "replSet initial sync expected first optime of " << applyGTE << rsLog;
log() << "replSet initial sync but received a first optime of " << t << " from " << hn << rsLog;
return false;
}
sethbmsg(str::stream() << "initial oplog application from " << hn << " starting at "
<< t.toStringPretty() << " to " << minValid.toStringPretty());
}
}
catch(DBException& e) {
log() << "replSet initial sync failing: " << e.toString() << rsLog;
return false;
}
/* we lock outside the loop to avoid the overhead of locking on every operation. */
writelock lk("");
// todo : use exhaust
OpTime ts;
time_t start = time(0);
unsigned long long n = 0;
while( 1 ) {
try {
if( !r.more() )
break;
BSONObj o = r.nextSafe(); /* note we might get "not master" at some point */
ts = o["ts"]._opTime();
{
if( (source->state() != MemberState::RS_PRIMARY &&
source->state() != MemberState::RS_SECONDARY) ||
replSetForceInitialSyncFailure ) {
int f = replSetForceInitialSyncFailure;
if( f > 0 ) {
replSetForceInitialSyncFailure = f-1;
log() << "replSet test code invoked, replSetForceInitialSyncFailure" << rsLog;
throw DBException("forced error",0);
}
log() << "replSet we are now primary" << rsLog;
throw DBException("primary changed",0);
}
if( ts >= applyGTE ) { // optimes before we started copying need not be applied.
bool failedUpdate = syncApply(o);
if( failedUpdate ) {
// we don't have the object yet, which is possible on initial sync. get it.
log() << "replSet info adding missing object" << endl; // rare enough we can log
if( !missingObjReader.connect(hn) ) { // ok to call more than once
log() << "replSet initial sync fails, couldn't connect to " << hn << endl;
return false;
}
const char *ns = o.getStringField("ns");
BSONObj query = BSONObjBuilder().append(o.getObjectField("o2")["_id"]).obj(); // might be more than just _id in the update criteria
BSONObj missingObj;
try {
missingObj = missingObjReader.findOne(
ns,
query );
} catch(...) {
log() << "replSet assertion fetching missing object" << endl;
throw;
}
if( missingObj.isEmpty() ) {
log() << "replSet missing object not found on source. presumably deleted later in oplog" << endl;
log() << "replSet o2: " << o.getObjectField("o2").toString() << endl;
log() << "replSet o firstfield: " << o.getObjectField("o").firstElementFieldName() << endl;
}
else {
Client::Context ctx(ns);
//.........这里部分代码省略.........
示例4: initialSyncOplogApplication
/* initial oplog application, during initial sync, after cloning.
@return false on failure.
this method returns an error and doesn't throw exceptions (i think).
*/
bool ReplSetImpl::initialSyncOplogApplication(
const Member *source,
OpTime applyGTE,
OpTime minValid) {
if( source == 0 ) return false;
const string hn = source->h().toString();
OplogReader r;
try {
if( !r.connect(hn) ) {
log() << "replSet initial sync error can't connect to " << hn << " to read " << rsoplog << rsLog;
return false;
}
r.queryGTE( rsoplog, applyGTE );
assert( r.haveCursor() );
{
if( !r.more() ) {
sethbmsg("replSet initial sync error reading remote oplog");
log() << "replSet initial sync error remote oplog (" << rsoplog << ") on host " << hn << " is empty?" << rsLog;
return false;
}
bo op = r.next();
OpTime t = op["ts"]._opTime();
r.putBack(op);
if( op.firstElement().fieldName() == string("$err") ) {
log() << "replSet initial sync error querying " << rsoplog << " on " << hn << " : " << op.toString() << rsLog;
return false;
}
uassert( 13508 , str::stream() << "no 'ts' in first op in oplog: " << op , !t.isNull() );
if( t > applyGTE ) {
sethbmsg(str::stream() << "error " << hn << " oplog wrapped during initial sync");
log() << "replSet initial sync expected first optime of " << applyGTE << rsLog;
log() << "replSet initial sync but received a first optime of " << t << " from " << hn << rsLog;
return false;
}
sethbmsg(str::stream() << "initial oplog application from " << hn << " starting at "
<< t.toStringPretty() << " to " << minValid.toStringPretty());
}
}
catch(DBException& e) {
log() << "replSet initial sync failing: " << e.toString() << rsLog;
return false;
}
/* we lock outside the loop to avoid the overhead of locking on every operation. */
writelock lk("");
// todo : use exhaust
OpTime ts;
time_t start = time(0);
unsigned long long n = 0;
while( 1 ) {
try {
if( !r.more() )
break;
BSONObj o = r.nextSafe(); /* note we might get "not master" at some point */
{
ts = o["ts"]._opTime();
/* if we have become primary, we dont' want to apply things from elsewhere
anymore. assumePrimary is in the db lock so we are safe as long as
we check after we locked above. */
if( (source->state() != MemberState::RS_PRIMARY &&
source->state() != MemberState::RS_SECONDARY) ||
replSetForceInitialSyncFailure ) {
int f = replSetForceInitialSyncFailure;
if( f > 0 ) {
replSetForceInitialSyncFailure = f-1;
log() << "replSet test code invoked, replSetForceInitialSyncFailure" << rsLog;
throw DBException("forced error",0);
}
log() << "replSet we are now primary" << rsLog;
throw DBException("primary changed",0);
}
if( ts >= applyGTE ) {
// optimes before we started copying need not be applied.
syncApply(o);
}
_logOpObjRS(o); /* with repl sets we write the ops to our oplog too */
}
if ( ++n % 1000 == 0 ) {
time_t now = time(0);
if (now - start > 10) {
// simple progress metering
log() << "replSet initialSyncOplogApplication applied " << n << " operations, synced to "
<< ts.toStringPretty() << rsLog;
start = now;
}
//.........这里部分代码省略.........