int applyInstruction(const Instruction* instr, sqlite3* db)
{
switch(instr->iType) {
case SQLITE_INSERT:
return applyInsert(db, instr);
case SQLITE_UPDATE:
return applyUpdate(db, instr);
case SQLITE_DELETE:
return applyDelete(db, instr);
default:
return CHANGESET_CORRUPT;
}
}
bool WriteBatchExecutor::applyWriteItem(const string& ns,
const WriteBatch::WriteItem& writeItem,
BSONObjBuilder* results) {
// Clear operation's LastError before starting.
_le->reset(true);
uint64_t itemTimeMicros = 0;
bool opSuccess = true;
// Each write operation executes in its own PageFaultRetryableSection. This means that
// a single batch can throw multiple PageFaultException's, which is not the case for
// other operations.
PageFaultRetryableSection s;
while (true) {
try {
// Execute the write item as a child operation of the current operation.
CurOp childOp(_client, _client->curop());
// TODO Modify CurOp "wrapped" constructor to take an opcode, so calling .reset()
// is unneeded
childOp.reset(_client->getRemote(), getOpCode(writeItem.getWriteType()));
childOp.ensureStarted();
OpDebug& opDebug = childOp.debug();
opDebug.ns = ns;
{
Client::WriteContext ctx(ns);
switch(writeItem.getWriteType()) {
case WriteBatch::WRITE_INSERT:
opSuccess = applyInsert(ns, writeItem, &childOp);
break;
case WriteBatch::WRITE_UPDATE:
opSuccess = applyUpdate(ns, writeItem, &childOp);
break;
case WriteBatch::WRITE_DELETE:
opSuccess = applyDelete(ns, writeItem, &childOp);
break;
}
}
childOp.done();
itemTimeMicros = childOp.totalTimeMicros();
opDebug.executionTime = childOp.totalTimeMillis();
opDebug.recordStats();
// Log operation if running with at least "-v", or if exceeds slow threshold.
if (logger::globalLogDomain()->shouldLog(logger::LogSeverity::Debug(1))
|| opDebug.executionTime > cmdLine.slowMS + childOp.getExpectedLatencyMs()) {
MONGO_TLOG(1) << opDebug.report(childOp) << endl;
}
// TODO Log operation if logLevel >= 3 and assertion thrown (as assembleResponse()
// does).
// Save operation to system.profile if shouldDBProfile().
if (childOp.shouldDBProfile(opDebug.executionTime)) {
profile(*_client, getOpCode(writeItem.getWriteType()), childOp);
}
break;
}
catch (PageFaultException& e) {
e.touch();
}
}
// Fill caller's builder with results of operation, using LastError.
results->append("ok", opSuccess);
_le->appendSelf(*results, false);
results->append("micros", static_cast<long long>(itemTimeMicros));
return opSuccess;
}