本文整理汇总了C++中DB::Get方法的典型用法代码示例。如果您正苦于以下问题：C++ DB::Get方法的具体用法？C++ DB::Get怎么用？C++ DB::Get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DB的用法示例。
在下文中一共展示了DB::Get方法的3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: Process
virtual void Process(){
string key = client_->cmd_part[1];
string val;
if(db.Get(key, &val))
sprintf(client_->writebuf, "VALUE %s %d\r\n%s\r\n",
key.c_str(), (int)key.length(), val.c_str());
else
sprintf(client_->writebuf, "NOT_FOUND\r\n");
get_ready_to_write(client_);
}示例2: main
int main(int argc, char** argv) {
srand (time(NULL));
if(argc != 3){
cout<<"invalid parameter!!"<<endl;
return 0;
}
string key, val;
int type = atoi(argv[1]);
int counter = 0;
if(type == 3){
key = argv[2];
}
else{
counter = atoi(argv[2]);
}
cout<<"type:"<<type<<endl;
cout<<"counter:"<<counter<<endl;
DB* db;
Options options;
// Optimize RocksDB. This is the easiest way to get RocksDB to perform well
options.IncreaseParallelism();
options.OptimizeLevelStyleCompaction();
// create the DB if it's not already present
options.create_if_missing = true;
// open DB
Status s = DB::Open(options, kDBPath, &db);
assert(s.ok());
if(type == 3){
s = db->Get(ReadOptions(), key, &val);
cout<<"ret:"<<val<<endl;
}
else if(type == 1){
time_t now = time(NULL);
for(int i = 0; i < counter ; i++){
key = "key_" + boost::lexical_cast<string>(i);
val = "val_" + boost::lexical_cast<string>(i)+"_" +boost::lexical_cast<string>(now);
s = db->Put(WriteOptions(), key, val);
}
}
else if(type == 2){
int k;
for(int i = 0; i < counter ; i++){
k = rand() % counter;
key = "key_" + boost::lexical_cast<string>(k);
s = db->Get(ReadOptions(), key, &val);
}
cout<<key<<":"<<val<<endl;
}
delete db;
return 0;
}示例3: fsck
int fsck(int argc, char** argv) {
const char* path;
if(argc == 2) {
path = argv[1];
} else {
path = "./harq.db";
}
std::cout << "Checking " << path << "...\n";
Options opts;
opts.paranoid_checks = true;
ReadOptions ro;
ro.verify_checksums = true;
DB* db;
Status s = DB::Open(opts, path, &db);
if(!s.ok()) {
std::cout << "Unable to open: " << s.ToString() << "\n";
return 1;
}
std::string val;
wire::QueueConfiguration cfg;
s = db->Get(ro, "!harq.config", &val);
if(!s.ok()) {
std::cout << "Unable to read configuration: " << s.ToString() << "\n";
return 1;
}
if(!cfg.ParseFromString(val)) {
std::cout << "Corrupt configuration detected.\n";
return 1;
}
std::cout << cfg.queues_size() << " queues detected.\n";
bool some_bad = false;
for(int i = 0; i < cfg.queues_size(); i++) {
const wire::QueueDeclaration& decl = cfg.queues(i);
std::cout << "name: " << decl.name() << "\n";
switch(decl.type()) {
case wire::QueueDeclaration::eBroadcast:
std::cout << " type: broadcast\n";
break;
case wire::QueueDeclaration::eTransient:
std::cout << " type: transient\n";
break;
case wire::QueueDeclaration::eDurable:
std::cout << " type: durable\n";
break;
default:
std::cout << " type: UNKNOWN(" << decl.type() << ")\n";
break;
}
s = db->Get(ro, decl.name(), &val);
if(!s.ok()) {
std::cout << " Unable to find queue on disk!\n";
} else {
wire::Queue qi;
if(!qi.ParseFromString(val)) {
std::cout << " Queue information corrupt on disk!\n";
} else {
std::cout << " total messages: " << qi.size() << "\n"
<< " ranges:\n";
for(int j = 0; j < qi.ranges_size(); j++) {
const wire::MessageRange& range = qi.ranges(j);
std::cout << " " << range.start() << " - "
<< range.start() + range.count() << "\n";
}
int valid = 0;
for(int j = 0; j < qi.ranges_size(); j++) {
const wire::MessageRange& range = qi.ranges(j);
int fin = range.start() + range.count();
for(int m = range.start(); m < fin; m++) {
std::stringstream tmp;
tmp << decl.name() << ":" << m;
s = db->Get(ro, tmp.str(), &val);
if(!s.ok()) {
std::cerr << "Missing message '" << tmp.str() << "'\n";
} else {
wire::Message msg;
if(!msg.ParseFromString(val)) {
some_bad = true;
std::cerr << "Corrupt message detected '" << tmp.str() << "'\n";
} else {
valid++;
//.........这里部分代码省略.........