MongoDB的简单使用代码,C代码库,德仔网

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【C】 MongoDB的简单使用

作者:baoer1024 / 发布于2012/3/6/ 681

连接MongoDB，查询是否有给定的值，如果没有，插入到数据库中。

ifndef _MONGO_H_</div>
<div>define _MONGP_H_</div>
#include <mongo/client/dbclient.h></div>
<div>using namespace std;</div>
<div>using namespace mongo;</div>
<div></div>
<div>class Cmongodb</div>
<div>{</div>
<div>public:</div>
<div>    Cmongodb(void);</div>
<div>public:</div>
<div>    void Init(string strip, int port, string tbname);</div>
<div>    bool ConnectServer(string & strerrmsg);</div>
<div>    bool IsFailedState();</div>
<div>    bool QueryTarget(string strhash,string & strerrmsg);</div>
<div>    bool UpdateTime(string strhash,string & strerrmsg);</div>
<div>    bool QueryandSet(string strhash,string & strerrmsg);</div>
<div>    bool QueryandInsertSet(string strhash,string & strerrmsg);</div>
<div></div>
<div>    bool InsertTarget(string strhash,string & strerrmsg);</div>
<div>    void set_action_interval(int);</div>
<div>private:</div>
<div>    string m_strip;</div>
<div>    int   m_port;</div>
<div>    string m_tbname;</div>
<div>    int   m_action_interval;</div>
<div>    DBClientConnection m_conn;</div>
<div>};</div>
<div></div>
<div></div>
<div>Cmongodb::Cmongodb(void){</div>
<div>    m_action_interval = 10;</div>
<div>}
<div></div>
<div>void Cmongodb::set_action_interval(int c){</div>
<div>    printf("%d\n",c);</div>
<div>    m_action_interval = c;</div>
<div>}
<div></div>
<div></div>
<div>void Cmongodb::Init(string strip, int port, string tbname){</div>
<div>    m_strip = strip;</div>
<div>    m_port = port;</div>
<div>    m_tbname = tbname;</div>
<div>}
<div></div>
<div>bool Cmongodb::ConnectServer(string & strerrmsg){</div>
<div></div>
<div>    char szDest[128]={0};</div>
<div>    sprintf(szDest,"%s:%d",m_strip.c_str(),m_port);</div>
<div>    if (!m_conn.connect(szDest, strerrmsg)) {</div>
<div>        return false;</div>
<div>    }
<div>    return true;</div>
<div>}
<div></div>
<div>bool Cmongodb::IsFailedState(){</div>
<div>    string str = m_conn.getServerAddress();</div>
<div>    if(m_conn.getServerAddress().empty())</div>
<div>        return true;</div>
<div>    return m_conn.isFailed();</div>
<div>}
<div></div>
<div></div>
<div></div>
<div>bool Cmongodb::QueryTarget(string strhash ,string & strerrmsg){</div>
<div></div>
<div>    mongo::BSONObjBuilder query;</div>
<div>    try{</div>
<div>        auto_ptr<mongo::DBClientCursor> cursor = m_conn.query(m_tbname,QUERY("_id" << strhash));</div>
<div>        return cursor->more();</div>
<div>    }
<div>    catch(DBException &e ){</div>
<div>        strerrmsg =e.what();</div>
<div>        return true;</div>
<div>    }
<div>    return true;</div>
<div>}
<div></div>
<div></div>
<div>bool Cmongodb::QueryandInsertSet(string strhash ,string & strerrmsg){</div>
<div>    mongo::BSONObjBuilder query;</div>
<div>    try{</div>
<div>        auto_ptr<mongo::DBClientCursor> cursor = m_conn.query(m_tbname,QUERY("_id" << strhash));</div>
<div>        time_t now_t = time(NULL);</div>
<div>        long long now_ll = now_t;</div>
<div>        if(cursor->more()){</div>
<div>            BSONObj p = cursor->next();</div>
<div>            int count = p.getIntField("count");</div>
<div>            count ++;</div>
<div>            m_conn.update(m_tbname,BSON("_id" << strhash), BSON("count" << count <<  "time"<< now_ll));</div>
<div>            if(count %10==0)</div>
<div>                return false;</div>
<div>            else</div>
<div>                return true;</div>
<div>        }else{</div>
<div>            m_conn.update(m_tbname,BSON("_id" << strhash), BSON("count" << 1 <<  "time"<< now_ll));</div>
<div>        }
<div>        return false;</div>
<div>    }
<div>    catch(DBException &e ){</div>
<div>        strerrmsg =e.what();</div>
<div>        return true;</div>
<div>    }
<div>}
<div></div>
<div></div>
<div>bool Cmongodb::InsertTarget(string strhash,string & strerrmsg){</div>
<div></div>
<div></div>
<div></div>
<div>    BSONObjBuilder query;</div>
<div>    try{</div>
<div>        query << "_id" << strhash;</div>
<div>        m_conn.insert(m_tbname, query.obj());</div>
<div>    }
<div>    catch(DBException &e ){</div>
<div>        strerrmsg = e.what();</div>
<div>        return false;</div>
<div>    }
<div>    return true;</div>
<div>}
<div>endif</div>
<div></div>

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