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// ramlog.cpp
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pch.h"
#include "log.h"
#include "ramlog.h"
#include "mongoutils/html.h"
#include "mongoutils/str.h"
namespace mongo {
using namespace mongoutils;
RamLog::RamLog( const std::string& name ) : _name(name), _totalLinesWritten(0), _lastWrite(0) {
h = 0; n = 0;
for( int i = 0; i < N; i++ )
lines[i][C-1] = 0;
if ( name.size() ) {
if ( ! _namedLock )
_namedLock = new mongo::mutex("RamLog::_namedLock");
scoped_lock lk( *_namedLock );
if ( ! _named )
_named = new RM();
(*_named)[name] = this;
}
}
RamLog::~RamLog() {
}
void RamLog::write(LogLevel ll, const std::string& str) {
_lastWrite = time(0);
_totalLinesWritten++;
char *p = lines[(h+n)%N];
unsigned sz = str.size();
if( sz < C ) {
if ( str.c_str()[sz-1] == '\n' ) {
memcpy(p, str.c_str(), sz-1);
p[sz-1] = 0;
}
else
strcpy(p, str.c_str());
}
else {
memcpy(p, str.c_str(), C-1);
}
if( n < N ) n++;
else h = (h+1) % N;
}
void RamLog::get( vector<const char*>& v) const {
for( unsigned x=0, i=h; x++ < n; i=(i+1)%N )
v.push_back(lines[i]);
}
int RamLog::repeats(const vector<const char *>& v, int i) {
for( int j = i-1; j >= 0 && j+8 > i; j-- ) {
if( strcmp(v[i]+20,v[j]+20) == 0 ) {
for( int x = 1; ; x++ ) {
if( j+x == i ) return j;
if( i+x>=(int) v.size() ) return -1;
if( strcmp(v[i+x]+20,v[j+x]+20) ) return -1;
}
return -1;
}
}
return -1;
}
string RamLog::clean(const vector<const char *>& v, int i, string line ) {
if( line.empty() ) line = v[i];
if( i > 0 && strncmp(v[i], v[i-1], 11) == 0 )
return string(" ") + line.substr(11);
return v[i];
}
string RamLog::color(const std::string& line) {
string s = str::after(line, "replSet ");
if( str::startsWith(s, "warning") || startsWith(s, "error") )
return html::red(line);
if( str::startsWith(s, "info") ) {
if( str::endsWith(s, " up\n") )
return html::green(line);
else if( str::contains(s, " down ") || str::endsWith(s, " down\n") )
return html::yellow(line);
return line; //html::blue(line);
}
return line;
}
/* turn http:... into an anchor */
string RamLog::linkify(const char *s) {
const char *p = s;
const char *h = strstr(p, "http://");
if( h == 0 ) return s;
const char *sp = h + 7;
while( *sp && *sp != ' ' ) sp++;
string url(h, sp-h);
stringstream ss;
ss << string(s, h-s) << "<a href=\"" << url << "\">" << url << "</a>" << sp;
return ss.str();
}
void RamLog::toHTML(stringstream& s) {
vector<const char*> v;
get( v );
s << "<pre>\n";
for( int i = 0; i < (int)v.size(); i++ ) {
verify( strlen(v[i]) > 20 );
int r = repeats(v, i);
if( r < 0 ) {
s << color( linkify( html::escape( clean(v, i) ).c_str() ) ) << '\n';
}
else {
stringstream x;
x << string(v[i], 0, 24);
int nr = (i-r);
int last = i+nr-1;
for( ; r < i ; r++ ) x << '.';
if( 1 ) {
stringstream r;
if( nr == 1 ) r << "repeat last line";
else r << "repeats last " << nr << " lines; ends " << string(v[last]+4,0,15);
s << html::a("", r.str(), html::escape( clean(v, i,x.str() ) ) );
}
else s << x.str();
s << '\n';
i = last;
}
}
s << "</pre>\n";
}
// ---------------
// static things
// ---------------
RamLog* RamLog::get( const std::string& name ) {
if ( ! _named )
return 0;
scoped_lock lk( *_namedLock );
RM::iterator i = _named->find( name );
if ( i == _named->end() )
return 0;
return i->second;
}
void RamLog::getNames( vector<string>& names ) {
if ( ! _named )
return;
scoped_lock lk( *_namedLock );
for ( RM::iterator i=_named->begin(); i!=_named->end(); ++i ) {
if ( i->second->n )
names.push_back( i->first );
}
}
mongo::mutex* RamLog::_namedLock;
RamLog::RM* RamLog::_named = 0;
Tee* const warnings = new RamLog("warnings"); // Things put here go in serverStatus
}
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