2008-11-30 02:01:58 +01:00
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// dbwebserver.cpp
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/**
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* Copyright (C) 2008 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "stdafx.h"
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#include "../util/miniwebserver.h"
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#include "db.h"
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2008-12-01 03:00:54 +01:00
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#include "repl.h"
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#include "replset.h"
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2008-11-30 02:01:58 +01:00
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extern int port;
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2008-12-04 20:33:18 +01:00
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extern const char *replInfo;
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2008-11-30 02:01:58 +01:00
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2008-12-02 20:24:45 +01:00
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time_t started = time(0);
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2008-12-05 22:45:10 +01:00
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/*
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string toString() {
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stringstream ss;
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unsigned long long dt = last - start;
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ss << dt/1000;
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ss << '\t';
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ss << timeLocked/1000 << '\t';
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if( dt )
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ss << (timeLocked*100)/dt << '%';
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return ss.str();
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}
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*/
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struct Timing {
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Timing() { last = start = timeLocked = 0; }
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unsigned long long last, start, timeLocked;
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};
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Timing tlast;
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const int NStats = 32;
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string lockStats[NStats];
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unsigned q = 0;
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void statsThread() {
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while( 1 ) {
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sleepsecs(4);
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dblock lk;
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q = (q+1)%NStats;
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Timing timing;
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dbMutexInfo.timingInfo(timing.start, timing.last, timing.timeLocked);
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if( tlast.start ) {
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unsigned long long elapsed = timing.last - tlast.last;
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unsigned long long locked = timing.timeLocked - tlast.timeLocked;
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{
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stringstream ss;
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ss << elapsed / 1000 << '\t';
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ss << locked / 1000 << '\t';
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if( elapsed )
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ss << (locked*100)/elapsed << '%';
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lockStats[q] = ss.str();
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}
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}
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tlast = timing;
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}
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}
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2008-11-30 02:01:58 +01:00
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class DbWebServer : public MiniWebServer {
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public:
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2008-12-05 22:45:10 +01:00
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// caller locks
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2008-12-01 03:00:54 +01:00
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void doLockedStuff(stringstream& ss) {
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2008-12-02 20:24:45 +01:00
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ss << "# databases: " << databases.size() << '\n';
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if( database ) {
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ss << "curclient: " << database->name;
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2008-12-01 03:00:54 +01:00
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ss << '\n';
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}
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2008-12-01 20:55:36 +01:00
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ss << "\n<b>replication</b>\n";
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2008-12-01 03:00:54 +01:00
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ss << "master: " << master << '\n';
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ss << "slave: " << slave << '\n';
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if( replPair ) {
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ss << "replpair:\n";
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ss << replPair->getInfo();
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}
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2008-12-05 22:45:10 +01:00
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ss << "\n<b>dt\ttlocked</b>\n";
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unsigned i = q;
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while( 1 ) {
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ss << lockStats[i] << '\n';
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i = (i-1)%NStats;
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if( i == q )
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break;
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}
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2008-12-01 03:00:54 +01:00
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}
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void doUnlockedStuff(stringstream& ss) {
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ss << "port: " << port << '\n';
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2008-12-05 22:45:10 +01:00
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ss << "dblocked: " << dbMutexInfo.isLocked() << " (initial)\n";
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2008-12-02 20:24:45 +01:00
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ss << "uptime: " << time(0)-started << " seconds\n";
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2008-12-01 20:55:36 +01:00
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if( allDead )
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ss << "<b>replication allDead=" << allDead << "</b>\n";
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2008-12-05 00:11:25 +01:00
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ss << "\nassertions:\n";
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for( int i = 0; i < 4; i++ ) {
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if( lastAssert[i].isSet() ) {
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ss << "<b>";
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if( i == 3 ) ss << "usererr";
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else ss << i;
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ss << "</b>" << ' ' << lastAssert[i].toString();
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}
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}
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ss << "\nreplInfo: " << replInfo << '\n';
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2008-12-01 03:00:54 +01:00
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}
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2008-11-30 02:01:58 +01:00
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virtual void doRequest(
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const char *rq, // the full request
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string url,
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// set these and return them:
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string& responseMsg,
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int& responseCode,
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vector<string>& headers // if completely empty, content-type: text/html will be added
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)
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{
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responseCode = 200;
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stringstream ss;
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2008-12-04 20:33:18 +01:00
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ss << "<html><head><title>";
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string dbname;
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{
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stringstream z;
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z << "db " << getHostName() << ':' << port << ' ';
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dbname = z.str();
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}
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ss << dbname << "</title></head><body><h2>" << dbname << "</h2><p>\n<pre>";
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2008-11-30 02:01:58 +01:00
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2008-12-01 03:00:54 +01:00
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doUnlockedStuff(ss);
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2008-11-30 02:01:58 +01:00
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int n = 2000;
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2008-12-05 22:45:10 +01:00
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Timer t;
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2008-11-30 02:01:58 +01:00
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while( 1 ) {
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2008-12-05 22:45:10 +01:00
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if( !dbMutexInfo.isLocked() ) {
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{
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dblock lk;
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ss << "time to get dblock: " << t.millis() << "ms\n";
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doLockedStuff(ss);
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}
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2008-11-30 02:01:58 +01:00
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break;
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}
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sleepmillis(1);
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if( --n < 0 ) {
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2008-12-05 22:45:10 +01:00
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ss << "\n<b>timed out getting dblock</b>\n";
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2008-11-30 02:01:58 +01:00
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break;
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}
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}
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ss << "</pre></body></html>";
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responseMsg = ss.str();
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}
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};
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void webServerThread() {
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2008-12-05 22:45:10 +01:00
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boost::thread thr(statsThread);
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2008-11-30 02:01:58 +01:00
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DbWebServer mini;
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if( mini.init(port+1000) )
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mini.run();
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}
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