mirror of
https://github.com/mongodb/mongo.git
synced 2024-11-29 16:47:28 +01:00
437 lines
14 KiB
C++
437 lines
14 KiB
C++
//engine_v8.cpp
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/* Copyright 2009 10gen Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "engine_v8.h"
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#include "v8_wrapper.h"
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#include "v8_utils.h"
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#include "v8_db.h"
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#define V8_SIMPLE_HEADER Locker l; HandleScope handle_scope; Context::Scope context_scope( _context );
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namespace mongo {
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// --- engine ---
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V8ScriptEngine::V8ScriptEngine() {}
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V8ScriptEngine::~V8ScriptEngine(){
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}
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void ScriptEngine::setup(){
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if ( !globalScriptEngine ){
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globalScriptEngine = new V8ScriptEngine();
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}
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}
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// --- scope ---
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V8Scope::V8Scope( V8ScriptEngine * engine )
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: _engine( engine ) ,
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_connectState( NOT ){
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Locker l;
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HandleScope handleScope;
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_context = Context::New();
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Context::Scope context_scope( _context );
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_global = Persistent< v8::Object >::New( _context->Global() );
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_this = Persistent< v8::Object >::New( v8::Object::New() );
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_global->Set(v8::String::New("print"), v8::FunctionTemplate::New(Print)->GetFunction() );
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_global->Set(v8::String::New("version"), v8::FunctionTemplate::New(Version)->GetFunction() );
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_global->Set(v8::String::New("load"),
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v8::FunctionTemplate::New(loadCallback, v8::External::New(this))->GetFunction() );
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_wrapper = Persistent< v8::Function >::New( getObjectWrapperTemplate()->GetFunction() );
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installDBTypes( _global );
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}
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V8Scope::~V8Scope(){
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Locker l;
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Context::Scope context_scope( _context );
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_wrapper.Dispose();
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_this.Dispose();
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for( unsigned i = 0; i < _funcs.size(); ++i )
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_funcs[ i ].Dispose();
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_funcs.clear();
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_global.Dispose();
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_context.Dispose();
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}
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Handle< Value > V8Scope::nativeCallback( const Arguments &args ) {
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Locker l;
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HandleScope handle_scope;
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Local< External > f = External::Cast( *args.Callee()->Get( v8::String::New( "_native_function" ) ) );
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NativeFunction function = (NativeFunction)(f->Value());
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BSONObjBuilder b;
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for( int i = 0; i < args.Length(); ++i ) {
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stringstream ss;
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ss << i;
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v8ToMongoElement( b, v8::String::New( "foo" ), ss.str(), args[ i ] );
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}
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BSONObj nativeArgs = b.obj();
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BSONObj ret;
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try {
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ret = function( nativeArgs );
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} catch( const std::exception &e ) {
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return v8::ThrowException(v8::String::New(e.what()));
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} catch( ... ) {
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return v8::ThrowException(v8::String::New("unknown exception"));
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}
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return handle_scope.Close( mongoToV8Element( ret.firstElement() ) );
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}
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Handle< Value > V8Scope::loadCallback( const Arguments &args ) {
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Locker l;
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HandleScope handle_scope;
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Handle<External> field = Handle<External>::Cast(args.Data());
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void* ptr = field->Value();
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V8Scope* self = static_cast<V8Scope*>(ptr);
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Context::Scope context_scope(self->_context);
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for (int i = 0; i < args.Length(); ++i) {
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std::string filename(toSTLString(args[i]));
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if (!self->execFile(filename, false , true , false)) {
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return v8::ThrowException(v8::String::New((std::string("error loading file: ") + filename).c_str()));
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}
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}
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return v8::True();
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}
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// ---- global stuff ----
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void V8Scope::init( BSONObj * data ){
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Locker l;
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if ( ! data )
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return;
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BSONObjIterator i( *data );
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while ( i.more() ){
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BSONElement e = i.next();
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setElement( e.fieldName() , e );
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}
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}
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void V8Scope::setNumber( const char * field , double val ){
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V8_SIMPLE_HEADER
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_global->Set( v8::String::New( field ) , v8::Number::New( val ) );
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}
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void V8Scope::setString( const char * field , const char * val ){
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V8_SIMPLE_HEADER
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_global->Set( v8::String::New( field ) , v8::String::New( val ) );
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}
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void V8Scope::setBoolean( const char * field , bool val ){
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V8_SIMPLE_HEADER
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_global->Set( v8::String::New( field ) , v8::Boolean::New( val ) );
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}
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void V8Scope::setElement( const char *field , const BSONElement& e ){
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V8_SIMPLE_HEADER
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_global->Set( v8::String::New( field ) , mongoToV8Element( e ) );
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}
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void V8Scope::setObject( const char *field , const BSONObj& obj , bool readOnly){
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V8_SIMPLE_HEADER
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// Set() accepts a ReadOnly parameter, but this just prevents the field itself
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// from being overwritten and doesn't protect the object stored in 'field'.
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_global->Set( v8::String::New( field ) , mongoToV8( obj, false, readOnly) );
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}
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int V8Scope::type( const char *field ){
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V8_SIMPLE_HEADER
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Handle<Value> v = get( field );
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if ( v->IsNull() )
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return jstNULL;
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if ( v->IsUndefined() )
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return Undefined;
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if ( v->IsString() )
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return String;
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if ( v->IsFunction() )
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return Code;
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if ( v->IsArray() )
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return Array;
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if ( v->IsBoolean() )
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return Bool;
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if ( v->IsInt32() )
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return NumberInt;
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if ( v->IsNumber() )
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return NumberDouble;
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if ( v->IsExternal() ){
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uassert( 10230 , "can't handle external yet" , 0 );
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return -1;
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}
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if ( v->IsDate() )
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return Date;
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if ( v->IsObject() )
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return Object;
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throw UserException( 12509, (string)"don't know what this is: " + field );
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}
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v8::Handle<v8::Value> V8Scope::get( const char * field ){
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return _global->Get( v8::String::New( field ) );
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}
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double V8Scope::getNumber( const char *field ){
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V8_SIMPLE_HEADER
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return get( field )->ToNumber()->Value();
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}
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int V8Scope::getNumberInt( const char *field ){
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V8_SIMPLE_HEADER
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return get( field )->ToInt32()->Value();
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}
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long long V8Scope::getNumberLongLong( const char *field ){
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V8_SIMPLE_HEADER
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return get( field )->ToInteger()->Value();
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}
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string V8Scope::getString( const char *field ){
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V8_SIMPLE_HEADER
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return toSTLString( get( field ) );
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}
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bool V8Scope::getBoolean( const char *field ){
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V8_SIMPLE_HEADER
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return get( field )->ToBoolean()->Value();
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}
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BSONObj V8Scope::getObject( const char * field ){
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V8_SIMPLE_HEADER
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Handle<Value> v = get( field );
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if ( v->IsNull() || v->IsUndefined() )
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return BSONObj();
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uassert( 10231 , "not an object" , v->IsObject() );
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return v8ToMongo( v->ToObject() );
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}
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// --- functions -----
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Local< v8::Function > V8Scope::__createFunction( const char * raw ){
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for(; isspace( *raw ); ++raw ); // skip whitespace
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string code = raw;
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if ( code.find( "function" ) == string::npos ){
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if ( code.find( "\n" ) == string::npos &&
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! hasJSReturn( code ) &&
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( code.find( ";" ) == string::npos || code.find( ";" ) == code.size() - 1 ) ){
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code = "return " + code;
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}
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code = "function(){ " + code + "}";
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}
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int num = _funcs.size() + 1;
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string fn;
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{
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stringstream ss;
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ss << "_funcs" << num;
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fn = ss.str();
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}
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code = fn + " = " + code;
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TryCatch try_catch;
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Handle<Script> script = v8::Script::Compile( v8::String::New( code.c_str() ) ,
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v8::String::New( fn.c_str() ) );
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if ( script.IsEmpty() ){
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_error = (string)"compile error: " + toSTLString( &try_catch );
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log() << _error << endl;
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return Local< v8::Function >();
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}
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Local<Value> result = script->Run();
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if ( result.IsEmpty() ){
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_error = (string)"compile error: " + toSTLString( &try_catch );
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log() << _error << endl;
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return Local< v8::Function >();
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}
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return v8::Function::Cast( *_global->Get( v8::String::New( fn.c_str() ) ) );
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}
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ScriptingFunction V8Scope::_createFunction( const char * raw ){
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V8_SIMPLE_HEADER
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Local< Value > ret = __createFunction( raw );
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if ( ret.IsEmpty() )
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return 0;
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Persistent<Value> f = Persistent< Value >::New( ret );
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uassert( 10232, "not a func" , f->IsFunction() );
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int num = _funcs.size() + 1;
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_funcs.push_back( f );
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return num;
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}
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void V8Scope::setThis( const BSONObj * obj ){
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V8_SIMPLE_HEADER
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if ( ! obj ){
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_this = Persistent< v8::Object >::New( v8::Object::New() );
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return;
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}
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//_this = mongoToV8( *obj );
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v8::Handle<v8::Value> argv[1];
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argv[0] = v8::External::New( createWrapperHolder( obj , true , false ) );
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_this = Persistent< v8::Object >::New( _wrapper->NewInstance( 1, argv ) );
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}
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int V8Scope::invoke( ScriptingFunction func , const BSONObj& argsObject, int timeoutMs , bool ignoreReturn ){
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V8_SIMPLE_HEADER
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Handle<Value> funcValue = _funcs[func-1];
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TryCatch try_catch;
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int nargs = argsObject.nFields();
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scoped_array< Handle<Value> > args;
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if ( nargs ){
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args.reset( new Handle<Value>[nargs] );
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BSONObjIterator it( argsObject );
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for ( int i=0; i<nargs; i++ ){
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BSONElement next = it.next();
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args[i] = mongoToV8Element( next );
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}
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setObject( "args", argsObject, true ); // for backwards compatibility
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} else {
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_global->Set( v8::String::New( "args" ), v8::Undefined() );
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}
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Local<Value> result = ((v8::Function*)(*funcValue))->Call( _this , nargs , args.get() );
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if ( result.IsEmpty() ){
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stringstream ss;
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ss << "error in invoke: " << toSTLString( &try_catch );
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_error = ss.str();
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log() << _error << endl;
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return 1;
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}
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if ( ! ignoreReturn ){
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_global->Set( v8::String::New( "return" ) , result );
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}
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return 0;
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}
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bool V8Scope::exec( const string& code , const string& name , bool printResult , bool reportError , bool assertOnError, int timeoutMs ){
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if ( timeoutMs ){
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static bool t = 1;
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if ( t ){
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log() << "timeoutMs not support for v8 yet" << endl;
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t = 0;
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}
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}
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V8_SIMPLE_HEADER
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TryCatch try_catch;
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Handle<Script> script = v8::Script::Compile( v8::String::New( code.c_str() ) ,
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v8::String::New( name.c_str() ) );
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if (script.IsEmpty()) {
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stringstream ss;
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ss << "compile error: " << toSTLString( &try_catch );
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_error = ss.str();
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if (reportError)
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log() << _error << endl;
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if ( assertOnError )
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uassert( 10233 , _error , 0 );
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return false;
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}
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Handle<v8::Value> result = script->Run();
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if ( result.IsEmpty() ){
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_error = (string)"exec error: " + toSTLString( &try_catch );
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if ( reportError )
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log() << _error << endl;
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if ( assertOnError )
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uassert( 10234 , _error , 0 );
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return false;
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}
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_global->Set( v8::String::New( "__lastres__" ) , result );
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if ( printResult && ! result->IsUndefined() ){
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cout << toSTLString( result ) << endl;
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}
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return true;
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}
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void V8Scope::injectNative( const char *field, NativeFunction func ){
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V8_SIMPLE_HEADER
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Handle< FunctionTemplate > f( v8::FunctionTemplate::New( nativeCallback ) );
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f->Set( v8::String::New( "_native_function" ), External::New( (void*)func ) );
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_global->Set( v8::String::New( field ), f->GetFunction() );
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}
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void V8Scope::gc() {
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Locker l;
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while( V8::IdleNotification() );
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}
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// ----- db access -----
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void V8Scope::localConnect( const char * dbName ){
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V8_SIMPLE_HEADER
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if ( _connectState == EXTERNAL )
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throw UserException( 12510, "externalSetup already called, can't call externalSetup" );
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if ( _connectState == LOCAL ){
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if ( _localDBName == dbName )
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return;
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throw UserException( 12511, "localConnect called with a different name previously" );
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}
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//_global->Set( v8::String::New( "Mongo" ) , _engine->_externalTemplate->GetFunction() );
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_global->Set( v8::String::New( "Mongo" ) , getMongoFunctionTemplate( true )->GetFunction() );
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exec( jsconcatcode , "localConnect 1" , false , true , true , 0 );
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exec( "_mongo = new Mongo();" , "local connect 2" , false , true , true , 0 );
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exec( (string)"db = _mongo.getDB(\"" + dbName + "\");" , "local connect 3" , false , true , true , 0 );
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_connectState = LOCAL;
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_localDBName = dbName;
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loadStored();
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}
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void V8Scope::externalSetup(){
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V8_SIMPLE_HEADER
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if ( _connectState == EXTERNAL )
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return;
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if ( _connectState == LOCAL )
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throw UserException( 12512, "localConnect already called, can't call externalSetup" );
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installFork( _global, _context );
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_global->Set( v8::String::New( "Mongo" ) , getMongoFunctionTemplate( false )->GetFunction() );
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exec( jsconcatcode , "shell setup" , false , true , true , 0 );
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_connectState = EXTERNAL;
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}
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// ----- internal -----
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void V8Scope::reset(){
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_startCall();
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}
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void V8Scope::_startCall(){
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_error = "";
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}
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} // namespace mongo
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