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// engine_java.h
/* 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.
*/
/* this file contains code to call into java (into the 10gen sandbox) from inside the database */
#pragma once
#include "../stdafx.h"
#include <jni.h>
#include <boost/thread/tss.hpp>
#include <errno.h>
#include <sys/types.h>
#if !defined(_WIN32)
#include <dirent.h>
#endif
#include "../db/jsobj.h"
#include "engine.h"
namespace mongo {
void jasserted(const char *msg, const char *file, unsigned line);
#define jassert(_Expression) if ( ! ( _Expression ) ){ jasserted(#_Expression, __FILE__, __LINE__); }
const char * findEd();
const char * findEd(const char *);
const string findJars();
class BSONObj;
class JavaJSImpl : public ScriptEngine {
public:
JavaJSImpl(const char * = 0);
~JavaJSImpl();
jlong scopeCreate();
int scopeInit( jlong id , const BSONObj * obj );
int scopeSetThis( jlong id , const BSONObj * obj );
jboolean scopeReset( jlong id );
void scopeFree( jlong id );
double scopeGetNumber( jlong id , const char * field );
string scopeGetString( jlong id , const char * field );
jboolean scopeGetBoolean( jlong id , const char * field );
BSONObj scopeGetObject( jlong id , const char * field );
char scopeGetType( jlong id , const char * field );
int scopeSetNumber( jlong id , const char * field , double val );
int scopeSetString( jlong id , const char * field , const char * val );
int scopeSetObject( jlong id , const char * field , const BSONObj * obj );
int scopeSetBoolean( jlong id , const char * field , jboolean val );
jlong functionCreate( const char * code );
/* return values:
public static final int NO_SCOPE = -1;
public static final int NO_FUNCTION = -2;
public static final int INVOKE_ERROR = -3;
public static final int INVOKE_SUCCESS = 0;
*/
int invoke( jlong scope , jlong function );
void printException();
void run( const char * js );
void detach( JNIEnv * env ) {
_jvm->DetachCurrentThread();
}
Scope * createScope();
void runTest();
private:
jobject create( const char * name ) {
jclass c = findClass( name );
if ( ! c )
return 0;
jmethodID cons = _getEnv()->GetMethodID( c , "<init>" , "()V" );
if ( ! cons )
return 0;
return _getEnv()->NewObject( c , cons );
}
jclass findClass( const char * name ) {
return _getEnv()->FindClass( name );
}
private:
JNIEnv * _getEnv();
JavaVM * _jvm;
JNIEnv * _mainEnv;
JavaVMInitArgs * _vmArgs;
boost::thread_specific_ptr<JNIEnv> * _envs;
jclass _dbhook;
jclass _dbjni;
jmethodID _scopeCreate;
jmethodID _scopeInit;
jmethodID _scopeSetThis;
jmethodID _scopeReset;
jmethodID _scopeFree;
jmethodID _scopeGetNumber;
jmethodID _scopeGetString;
jmethodID _scopeGetObject;
jmethodID _scopeGetBoolean;
jmethodID _scopeGuessObjectSize;
jmethodID _scopeGetType;
jmethodID _scopeSetNumber;
jmethodID _scopeSetString;
jmethodID _scopeSetObject;
jmethodID _scopeSetBoolean;
jmethodID _functionCreate;
jmethodID _invoke;
};
extern JavaJSImpl *JavaJS;
// a javascript "scope"
class JavaScope : public Scope {
public:
JavaScope() {
s = JavaJS->scopeCreate();
}
virtual ~JavaScope() {
JavaJS->scopeFree(s);
s = 0;
}
void reset() {
JavaJS->scopeReset(s);
}
void init( BSONObj * o ) {
JavaJS->scopeInit( s , o );
}
void localConnect( const char * dbName ){
setString("$client", dbName );
}
double getNumber(const char *field) {
return JavaJS->scopeGetNumber(s,field);
}
string getString(const char *field) {
return JavaJS->scopeGetString(s,field);
}
bool getBoolean(const char *field) {
return JavaJS->scopeGetBoolean(s,field);
}
BSONObj getObject(const char *field ) {
return JavaJS->scopeGetObject(s,field);
}
int type(const char *field ) {
return JavaJS->scopeGetType(s,field);
}
void setThis( const BSONObj * obj ){
JavaJS->scopeSetThis( s , obj );
}
void setNumber(const char *field, double val ) {
JavaJS->scopeSetNumber(s,field,val);
}
void setString(const char *field, const char * val ) {
JavaJS->scopeSetString(s,field,val);
}
void setObject(const char *field, const BSONObj& obj , bool readOnly ) {
uassert( 10211 , "only readOnly setObject supported in java" , readOnly );
JavaJS->scopeSetObject(s,field,&obj);
}
void setBoolean(const char *field, bool val ) {
JavaJS->scopeSetBoolean(s,field,val);
}
ScriptingFunction createFunction( const char * code ){
return JavaJS->functionCreate( code );
}
int invoke( ScriptingFunction function , const BSONObj& args ){
setObject( "args" , args , true );
return JavaJS->invoke(s,function);
}
string getError(){
return getString( "error" );
}
jlong s;
};
JNIEXPORT void JNICALL java_native_say(JNIEnv *, jclass, jobject outBuffer );
JNIEXPORT jint JNICALL java_native_call(JNIEnv *, jclass, jobject outBuffer , jobject inBuffer );
} // namespace mongo
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