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blpapijs.cpp
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blpapijs.cpp
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#ifndef BUILDING_NODE_EXTENSION
#define BUILDING_NODE_EXTENSION
#endif
#include <v8.h>
#include <node.h>
#include <node_version.h>
#include <node_object_wrap.h>
#include <uv.h>
#include <blpapi_session.h>
#include <blpapi_eventdispatcher.h>
#include <blpapi_event.h>
#include <blpapi_message.h>
#include <blpapi_element.h>
#include <blpapi_name.h>
#include <blpapi_request.h>
#include <blpapi_subscriptionlist.h>
#include <blpapi_defs.h>
#include <deque>
#include <map>
#include <sstream>
#include <cmath>
#include <ctime>
#include <cstdlib>
#ifdef _WIN32
#include <time.h>
#endif
#ifndef uv_mutex_t
# ifdef _WIN32
# define uv_mutex_t CRITICAL_SECTION
# define uv_mutex_init(x) InitializeCriticalSection(x)
# define uv_mutex_lock(x) EnterCriticalSection(x)
# define uv_mutex_unlock(x) LeaveCriticalSection(x)
# define uv_mutex_destroy(x) DeleteCriticalSection(x)
# else
# define uv_mutex_t pthread_mutex_t
# define uv_mutex_init(x) pthread_mutex_init(x, NULL)
# define uv_mutex_lock(x) pthread_mutex_lock(x)
# define uv_mutex_unlock(x) pthread_mutex_unlock(x)
# define uv_mutex_destroy(x) pthread_mutex_destroy(x)
# endif
#endif
# define NoRetThrowException(x) args.GetIsolate()->ThrowException(x)
# define RetThrowException(x) args.GetIsolate()->ThrowException(x); return
# define NEW_STRING(x) String::NewFromUtf8(args.GetIsolate(), x)
#define BLPAPI_EXCEPTION_TRY try {
#define BLPAPI_EXCEPTION_NEW(type) \
Local<Object> err = \
Exception::Error(NEW_STRING(e.description().c_str()))->ToObject(); \
err->Set(NEW_STRING("typeName"), NEW_STRING(#type));
#define BLPAPI_EXCEPTION_THROW(prefix, type) \
BLPAPI_EXCEPTION_NEW(type) \
prefix##RetThrowException(err);
#define BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, type) \
} catch (const blpapi::type& e) { \
BLPAPI_EXCEPTION_THROW(prefix, type)
#define BLPAPI_EXCEPTION_IMPL(prefix) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, DuplicateCorrelationIdException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, InvalidStateException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, InvalidArgumentException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, InvalidConversionException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, IndexOutOfRangeException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, FieldNotFoundException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, NotFoundException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, UnknownErrorException) \
BLPAPI_EXCEPTION_CATCH_BLOCK(prefix, UnsupportedOperationException) \
}
#define BLPAPI_EXCEPTION_CATCH \
BLPAPI_EXCEPTION_IMPL(No)
#define BLPAPI_EXCEPTION_CATCH_RETURN \
BLPAPI_EXCEPTION_IMPL()
using namespace node;
using namespace v8;
namespace BloombergLP {
namespace blpapijs {
namespace {
static inline void
mkdatetime(blpapi::Datetime* dt, Local<Value> val)
{
double ms = Date::Cast(*val)->NumberValue();
time_t sec = static_cast<time_t>(ms / 1000.0);
int remainder = static_cast<int>(fmod(ms, 1000.0));
struct tm tm;
#ifdef _WIN32
gmtime_s(&tm, &sec);
#else
gmtime_r(&sec, &tm);
#endif
dt->setDate(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
dt->setTime(tm.tm_hour, tm.tm_min, tm.tm_sec, remainder);
}
template <typename T>
void loadElement(blpapi::Element *elem, const T& value, bool forArray)
{
if (forArray) {
elem->appendValue(value);
} else {
elem->setValue(value);
}
}
int loadElement(blpapi::Element *elem,
Local<Value> val,
bool forArray,
std::string *error)
{
if (val->IsString()) {
loadElement(elem, *String::Utf8Value(val), forArray);
} else if (val->IsBoolean()) {
loadElement(elem, val->BooleanValue(), forArray);
} else if (val->IsNumber()) {
loadElement(elem, val->NumberValue(), forArray);
} else if (val->IsInt32()) {
loadElement(elem, val->Int32Value(), forArray);
} else if (val->IsUint32()) {
loadElement(elem,
static_cast<blpapi::Int64>(val->Uint32Value()),
forArray);
} else if (val->IsDate()) {
blpapi::Datetime dt;
mkdatetime(&dt, val);
loadElement(elem, dt, forArray);
} else if (val->IsArray()) {
blpapi::Element subElem;
if (forArray) {
subElem = elem->appendElement();
elem = &subElem;
}
Local<Object> subArray = val->ToObject();
const int subArrayLen = Array::Cast(*val)->Length();
for (int i = 0; i < subArrayLen; ++i) {
if (loadElement(elem, subArray->Get(i), true, error)) {
return 1;
}
}
} else if (val->IsObject()) {
blpapi::Element subElem;
if (forArray) {
subElem = elem->appendElement();
elem = &subElem;
}
Local<Object> obj = val->ToObject();
Local<Array> props = obj->GetPropertyNames();
for (std::size_t i = 0; i < props->Length(); ++i) {
Local<Value> key = props->Get(i);
String::Utf8Value keyStr(key);
blpapi::Element elemValue = elem->getElement(*keyStr);
if (loadElement(&elemValue, obj->Get(key), false, error)) {
return 1;
}
}
} else {
if (forArray) {
*error = "Array contains invalid type";
} else {
*error = "Object contains invalid value type.";
}
return 1;
}
return 0;
}
inline
int loadRequest(blpapi::Request *request,
Local<Value> val,
std::string *error)
{
blpapi::Element elem = request->asElement();
return loadElement(&elem, val->ToObject(), false, error);
}
} // close anonymous namespace
// ==============
// class Identity
// ==============
// The Identity object is opaque to js code: it's part of the authentication
// response and passed back in to subsequent requests, with no other operations
// allowed.
class Identity : public ObjectWrap {
private:
// CLASS DATA
static Eternal<ObjectTemplate> s_objectTemplate;
// DATA
blpapi::Identity d_identity;
// PRIVATE CREATORS
Identity(const blpapi::Identity& identity);
public:
// CLASS METHODS
static void Initialize(Handle<Object> target);
static Local<Object> New(Isolate *isolate,
const blpapi::Identity& identity);
// ACCESSORS
const blpapi::Identity* getIdentity() const;
};
// --------------
// class Identity
// --------------
// CLASS DATA
Eternal<ObjectTemplate> Identity::s_objectTemplate;
// PRIVATE CREATORS
Identity::Identity(const blpapi::Identity& identity)
: d_identity(identity)
{
}
// CLASS METHODS
void Identity::Initialize(Handle<Object> target)
{
Local<ObjectTemplate> objectTemplate;
Isolate *isolate = Isolate::GetCurrent();
HandleScope scope(isolate);
objectTemplate = ObjectTemplate::New(isolate);
s_objectTemplate.Set(isolate, objectTemplate);
objectTemplate->SetInternalFieldCount(1);
}
Local<Object> Identity::New(Isolate *isolate, const blpapi::Identity& identity)
{
Local<Object> object;
object = s_objectTemplate.Get(isolate)->NewInstance();
Identity *id = new Identity(identity);
id->Wrap(object);
return object;
}
// ACCESSORS
const blpapi::Identity* Identity::getIdentity() const
{
return &d_identity;
}
class Session : public ObjectWrap,
public blpapi::EventHandler {
public:
Session(const FunctionCallbackInfo<Value>& args,
const std::string& serverHost, int serverPort,
const std::string& authenticationOptions);
~Session();
static void Initialize(Handle<Object> target);
static void New(const FunctionCallbackInfo<Value>& args);
static void Start(const FunctionCallbackInfo<Value>& args);
static void Authorize(const FunctionCallbackInfo<Value>& args);
static void AuthorizeUser(const FunctionCallbackInfo<Value>& args);
static void Stop(const FunctionCallbackInfo<Value>& args);
static void Destroy(const FunctionCallbackInfo<Value>& args);
static void OpenService(const FunctionCallbackInfo<Value>& args);
static void Subscribe(const FunctionCallbackInfo<Value>& args);
static void Resubscribe(const FunctionCallbackInfo<Value>& args);
static void Unsubscribe(const FunctionCallbackInfo<Value>& args);
static void Request(const FunctionCallbackInfo<Value>& args);
private:
Session();
Session(const Session&);
Session& operator=(const Session&);
static void subscribe(const FunctionCallbackInfo<Value>& args,
int action);
static void formFields(std::string* str, Handle<Object> array);
static void formOptions(std::string* str, Handle<Value> array);
static Handle<Value> elementToValue(Isolate *, const blpapi::Element& e);
static Handle<Value> elementValueToValue(Isolate *,
const blpapi::Element& e,
int idx = 0);
const blpapi::Identity* getIdentity(const FunctionCallbackInfo<Value>& args,
int index);
bool processEvent(const blpapi::Event& ev, blpapi::Session* session);
static void processEvents(uv_async_t *async);
void processMessage(Isolate *isolate,
blpapi::Event::EventType et,
const blpapi::Message& msg);
void emit(Isolate *isolate, int argc, Handle<Value> argv[]);
static uv_async_t s_async;
static Persistent<String> s_emit;
static Persistent<String> s_event_type;
static Persistent<String> s_message_type;
static Persistent<String> s_topic_name;
static Persistent<String> s_correlations;
static Persistent<String> s_value;
static Persistent<String> s_class_id;
static Persistent<String> s_data;
static Persistent<String> s_identity;
Isolate *d_isolate;
blpapi::SessionOptions d_options;
blpapi::Session *d_session;
blpapi::Identity d_identity;
Persistent<Object> d_session_ref;
std::deque<blpapi::Event> d_que;
std::map<int, blpapi::Identity> d_identities;
uv_mutex_t d_que_mutex;
bool d_started;
bool d_stopped;
bool d_dispatching;
bool d_destroy;
};
uv_async_t Session::s_async;
Persistent<String> Session::s_emit;
Persistent<String> Session::s_event_type;
Persistent<String> Session::s_message_type;
Persistent<String> Session::s_topic_name;
Persistent<String> Session::s_correlations;
Persistent<String> Session::s_value;
Persistent<String> Session::s_class_id;
Persistent<String> Session::s_data;
Persistent<String> Session::s_identity;
Session::Session(
const FunctionCallbackInfo<Value>& args,
const std::string& serverHost, int serverPort,
const std::string& authenticationOptions)
: d_isolate(args.GetIsolate())
, d_started(false)
, d_stopped(false)
, d_dispatching(false)
, d_destroy(false)
{
d_options.setServerHost(serverHost.c_str());
d_options.setServerPort(serverPort);
if (authenticationOptions.length())
d_options.setAuthenticationOptions(authenticationOptions.c_str());
BLPAPI_EXCEPTION_TRY
d_session = new blpapi::Session(d_options, this);
BLPAPI_EXCEPTION_CATCH
uv_mutex_init(&d_que_mutex);
uv_ref(reinterpret_cast<uv_handle_t *>(&s_async));
}
Session::~Session()
{
// Ref on the event loop is released in Destroy
uv_mutex_destroy(&d_que_mutex);
// If the `Session` object in Javascript is collected without `stop()`
// or `destroy()` being called, the underlying `blpapi::Session` still
// needs to be cleaned up.
if (d_session) {
delete d_session;
d_session = NULL;
}
}
void
Session::Initialize(Handle<Object> target)
{
Isolate *isolate = Isolate::GetCurrent();
HandleScope scope(isolate);
Local<FunctionTemplate> t = FunctionTemplate::New(isolate, Session::New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "start", Start);
NODE_SET_PROTOTYPE_METHOD(t, "authorize", Authorize);
NODE_SET_PROTOTYPE_METHOD(t, "authorizeUser", AuthorizeUser);
NODE_SET_PROTOTYPE_METHOD(t, "stop", Stop);
NODE_SET_PROTOTYPE_METHOD(t, "destroy", Destroy);
NODE_SET_PROTOTYPE_METHOD(t, "openService", OpenService);
NODE_SET_PROTOTYPE_METHOD(t, "subscribe", Subscribe);
NODE_SET_PROTOTYPE_METHOD(t, "resubscribe", Resubscribe);
NODE_SET_PROTOTYPE_METHOD(t, "unsubscribe", Unsubscribe);
NODE_SET_PROTOTYPE_METHOD(t, "request", Request);
target->Set(String::NewFromUtf8(isolate, "Session",
v8::String::kInternalizedString),
t->GetFunction());
uv_async_init(uv_default_loop(), &s_async, Session::processEvents);
#define NODE_PSYMBOL(x) \
String::NewFromUtf8(isolate, x, String::kInternalizedString)
s_emit.Reset(isolate, NODE_PSYMBOL("emit"));
s_event_type.Reset(isolate, NODE_PSYMBOL("eventType"));
s_message_type.Reset(isolate, NODE_PSYMBOL("messageType"));
s_topic_name.Reset(isolate, NODE_PSYMBOL("topicName"));
s_correlations.Reset(isolate, NODE_PSYMBOL("correlations"));
s_value.Reset(isolate, NODE_PSYMBOL("value"));
s_class_id.Reset(isolate, NODE_PSYMBOL("classId"));
s_data.Reset(isolate, NODE_PSYMBOL("data"));
s_identity.Reset(isolate, NODE_PSYMBOL("identity"));
#undef NODE_PSYMBOL
}
void
Session::New(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
std::string serverHost;
int serverPort = 0;
std::string authenticationOptions;
if (args.Length() > 0 && args[0]->IsObject()) {
Local<Object> o = args[0]->ToObject();
// Capture the host name
Local<Value> h = o->Get(NEW_STRING("host"));
if (h->IsUndefined())
h = o->Get(NEW_STRING("serverHost"));
if (!h->IsUndefined()) {
String::Utf8Value hv(h);
if (hv.length())
serverHost.assign(*hv, hv.length());
}
if (0 == serverHost.length()) {
RetThrowException(Exception::Error(NEW_STRING(
"Configuration missing 'serverHost'.")));
}
// Capture the port number
Local<Value> p = o->Get(NEW_STRING("port"));
if (p->IsUndefined())
p = o->Get(NEW_STRING("serverPort"));
if (p->IsInt32())
serverPort = p->ToInt32()->Value();
if (0 == serverPort) {
RetThrowException(Exception::Error(NEW_STRING(
"Configuration missing non-zero 'serverPort'.")));
}
// Capture optional authentication options
Local<Value> ao = o->Get(NEW_STRING("authenticationOptions"));
if (!ao->IsUndefined()) {
String::Utf8Value aov(ao);
if (aov.length())
authenticationOptions.assign(*aov, aov.length());
}
} else {
RetThrowException(Exception::Error(NEW_STRING(
"Configuration object must be passed as parameter.")));
}
Session *session = new Session(args, serverHost, serverPort,
authenticationOptions);
session->Wrap(args.This());
args.GetReturnValue().Set(scope.Escape(args.This()));
}
void
Session::Start(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
if (session->d_started) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been started.")));
}
if (session->d_stopped) {
RetThrowException(Exception::Error(NEW_STRING(
"Stopped sessions can not be restarted.")));
}
BLPAPI_EXCEPTION_TRY
session->d_session->startAsync();
BLPAPI_EXCEPTION_CATCH_RETURN
session->d_session_ref.Reset(args.GetIsolate(), args.This());
session->d_started = true;
args.GetReturnValue().Set(scope.Escape(args.This()));
}
// Set the default identity to use when a request/subscription does not
// specify the identity to use.
void
Session::Authorize(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
if (args.Length() < 1 || !args[0]->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"Service URI string must be provided as first parameter.")));
}
if (args.Length() < 2 || !args[1]->IsInt32()) {
RetThrowException(Exception::Error(NEW_STRING(
"Integer correlation identifier must be provided as second "
"parameter.")));
}
if (args.Length() > 2) {
RetThrowException(Exception::Error(NEW_STRING(
"Function expects at most two arguments.")));
}
Local<String> s = args[0]->ToString();
String::Utf8Value uriv(s);
int cidi = args[1]->Int32Value();
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
BLPAPI_EXCEPTION_TRY
blpapi::EventQueue tokenEventQueue;
blpapi::CorrelationId tokenCid(static_cast<void*>(&tokenEventQueue));
session->d_session->generateToken(tokenCid, &tokenEventQueue);
std::string token;
blpapi::Event ev = tokenEventQueue.nextEvent();
if (blpapi::Event::TOKEN_STATUS == ev.eventType() ||
blpapi::Event::REQUEST_STATUS == ev.eventType()) {
blpapi::MessageIterator msgIter(ev);
while (msgIter.next()) {
blpapi::Message msg = msgIter.message();
if ("TokenGenerationSuccess" == msg.messageType()) {
token = msg.getElementAsString("token");
} else {
std::stringstream ss;
ss << "Failed to generate token: " << msg.getElement("reason");
std::string s = ss.str();
RetThrowException(Exception::Error(NEW_STRING(s.c_str())));
}
}
}
if (0 == token.length()) {
RetThrowException(Exception::Error(NEW_STRING(
"Failed to get token.")));
}
blpapi::Service authService = session->d_session->getService(*uriv);
blpapi::Request authRequest = authService.createAuthorizationRequest(
"AuthorizationRequest");
authRequest.set("token", token.c_str());
session->d_identity = session->d_session->createIdentity();
blpapi::CorrelationId cid(cidi);
session->d_session->sendAuthorizationRequest(authRequest,
&session->d_identity,
cid);
BLPAPI_EXCEPTION_CATCH_RETURN
args.GetReturnValue().Set(
scope.Escape(Integer::New(args.GetIsolate(), cidi)));
}
// Create a new Identity object and send an authorization request for it.
// If the authorization request succeeds, the wrapped Identity object is
// in the response as data.identity.
void
Session::AuthorizeUser(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
if (args.Length() < 1 || !args[0]->IsObject()) {
RetThrowException(Exception::Error(NEW_STRING(
"Object containing auth request parameters must be provided as "
"first parameter.")));
}
if (args.Length() < 2 || !args[1]->IsInt32()) {
RetThrowException(Exception::Error(NEW_STRING(
"Integer correlation identifier must be provided as second "
"parameter.")));
}
if (args.Length() > 2) {
RetThrowException(Exception::Error(NEW_STRING(
"Function expects at most two arguments.")));
}
int cidi = args[1]->Int32Value();
Session *session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
BLPAPI_EXCEPTION_TRY
blpapi::Service service = session->d_session->getService("//blp/apiauth");
blpapi::Request request(service.createAuthorizationRequest(
"AuthorizationRequest"));
std::string error;
if (loadRequest(&request, args[0], &error)) {
RetThrowException(Exception::Error(NEW_STRING(error.c_str())));
}
blpapi::CorrelationId cid(cidi);
// We need to insert the completed Identity object into the response,
// so we store it here.
blpapi::Identity& identity = session->d_identities[cidi]
= session->d_session->createIdentity();
session->d_session->sendAuthorizationRequest(request, &identity, cid);
BLPAPI_EXCEPTION_CATCH_RETURN
args.GetReturnValue().Set(scope.Escape(Integer::New(args.GetIsolate(),
cidi)));
}
void
Session::Stop(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
if (!session->d_started) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has not been started.")));
}
if (session->d_stopped) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been stopped.")));
}
session->d_stopped = true;
BLPAPI_EXCEPTION_TRY
session->d_session->stopAsync();
BLPAPI_EXCEPTION_CATCH_RETURN
args.GetReturnValue().Set(scope.Escape(args.This()));
}
void
Session::Destroy(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
if (!session->d_started) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has not been started.")));
}
if (!session->d_stopped) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has not been stopped.")));
}
session->d_session_ref.Reset();
uv_unref(reinterpret_cast<uv_handle_t *>(&s_async));
// The `blpapi::Session` can not be deleted from within a dispatch
// loop while a `MessageIterator` still exists. Instead, indicate
// it should be destroyed after the dispatching function exits the
// loop.
if (session->d_dispatching) {
session->d_destroy = true;
} else {
delete session->d_session;
session->d_session = NULL;
}
args.GetReturnValue().Set(scope.Escape(args.This()));
}
void
Session::OpenService(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
if (args.Length() < 1 || !args[0]->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"Service URI string must be provided as first parameter.")));
}
if (args.Length() < 2 || !args[1]->IsInt32()) {
RetThrowException(Exception::Error(NEW_STRING(
"Integer correlation identifier must be provided as second "
"parameter.")));
}
if (args.Length() > 2) {
RetThrowException(Exception::Error(NEW_STRING(
"Function expects at most two arguments.")));
}
Local<String> s = args[0]->ToString();
String::Utf8Value uriv(s);
int cidi = args[1]->Int32Value();
blpapi::CorrelationId cid(cidi);
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
BLPAPI_EXCEPTION_TRY
session->d_session->openServiceAsync(*uriv, cid);
BLPAPI_EXCEPTION_CATCH_RETURN
args.GetReturnValue().Set(
scope.Escape(Integer::New(args.GetIsolate(), cidi)));
}
void
Session::formFields(std::string* str, Handle<Object> object)
{
// Use the HandleScope of the calling function for speed.
assert(object->IsArray());
std::stringstream ss;
// Format each array value into the options string "V[&V]"
for (std::size_t i = 0; i < Array::Cast(*object)->Length(); ++i) {
Local<String> s = object->Get(i)->ToString();
String::Utf8Value v(s);
if (v.length()) {
if (i > 0)
ss << ",";
ss << *v;
}
}
*str = ss.str();
}
void
Session::formOptions(std::string* str, Handle<Value> value)
{
// Use the HandleScope of the calling function for speed.
if (value->IsUndefined() || value->IsNull())
return;
assert(value->IsObject());
std::stringstream ss;
if (value->IsArray()) {
// Format each array value into the options string "V[&V]"
Local<Object> object = value->ToObject();
for (std::size_t i = 0; i < Array::Cast(*object)->Length(); ++i) {
Local<String> key = object->Get(i)->ToString();
String::Utf8Value valv(key);
if (valv.length()) {
if (i > 0)
ss << "&";
ss << *valv;
}
}
} else {
// Format each KV pair into the options string "K=V[&K=V]"
Local<Object> object = value->ToObject();
Local<Array> keys = object->GetPropertyNames();
for (std::size_t i = 0; i < keys->Length(); ++i) {
Local<String> key = keys->Get(i)->ToString();
String::Utf8Value keyv(key);
if (keyv.length()) {
if (i > 0)
ss << "&";
ss << *keyv << "=";
}
Local<String> val = object->Get(key)->ToString();
String::Utf8Value valv(val);
if (valv.length())
ss << *valv;
}
}
*str = ss.str();
}
void
Session::subscribe(const FunctionCallbackInfo<Value>& args, int action)
{
EscapableHandleScope scope(args.GetIsolate());
if (args.Length() < 1 || !args[0]->IsArray()) {
RetThrowException(Exception::Error(NEW_STRING(
"Array of subscription information must be provided.")));
}
if (args.Length() >= 2 && !args[1]->IsUndefined() &&
!args[1]->IsNull() && !args[1]->IsObject()) {
RetThrowException(Exception::Error(NEW_STRING(
"Optional identity must be an object.")));
}
if (args.Length() >= 3 && !args[2]->IsUndefined() &&
!args[2]->IsNull() && !args[2]->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"Optional subscription label must be a string.")));
}
if (args.Length() > 3) {
RetThrowException(Exception::Error(NEW_STRING(
"Function expects at most three arguments.")));
}
blpapi::SubscriptionList sl;
Local<Object> o = args[0]->ToObject();
for (std::size_t i = 0; i < Array::Cast(*(args[0]))->Length(); ++i) {
Local<Value> v = o->Get(i);
if (!v->IsObject()) {
RetThrowException(Exception::Error(NEW_STRING(
"Array elements must be objects containing subscription "
"information.")));
}
Local<Object> io = v->ToObject();
// Process 'security' string
Local<Value> iv = io->Get(NEW_STRING("security"));
if (!iv->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"Property 'security' must be a string.")));
}
String::Utf8Value secv(iv);
if (0 == secv.length()) {
RetThrowException(Exception::Error(NEW_STRING(
"Property 'security' must be a string.")));
}
// Process 'fields' array
iv = io->Get(NEW_STRING("fields"));
if (!iv->IsArray()) {
RetThrowException(Exception::Error(NEW_STRING(
"Property 'fields' must be an array of strings.")));
}
std::string fields;
formFields(&fields, iv->ToObject());
// Process 'options' array
iv = io->Get(NEW_STRING("options"));
if (!iv->IsUndefined() && !iv->IsNull() && !iv->IsObject()) {
RetThrowException(Exception::Error(NEW_STRING(
"Property 'options' must be an object containing "
"whose keys and key values will be configured as "
"options.")));
}
std::string options;
formOptions(&options, iv);
// Process 'correlation' int or string
iv = io->Get(NEW_STRING("correlation"));
if (!iv->IsInt32()) {
RetThrowException(Exception::Error(NEW_STRING(
"Property 'correlation' must be an integer.")));
}
int correlation = iv->Int32Value();
sl.add(*secv, fields.c_str(), options.c_str(),
blpapi::CorrelationId(correlation));
}
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
BLPAPI_EXCEPTION_TRY
const blpapi::Identity *identity = session->getIdentity(args, 1);
if (args.Length() == 3) {
Local<String> s = args[2]->ToString();
String::Utf8Value labelv(s);
if (action == 1)
session->d_session->resubscribe(sl, *labelv, labelv.length());
else if (action == 2)
session->d_session->unsubscribe(sl);
else
session->d_session->subscribe(sl, *identity, *labelv, labelv.length());
} else {
if (action == 1)
session->d_session->resubscribe(sl);
else if (action == 2)
session->d_session->unsubscribe(sl);
else
session->d_session->subscribe(sl, *identity);
}
BLPAPI_EXCEPTION_CATCH_RETURN
args.GetReturnValue().Set(scope.Escape(args.This()));
}
# define DEFINE_WRAPPER(name, func, i) \
void \
Session::name(const FunctionCallbackInfo<Value>& args) \
{ \
Session::func(args, i); \
}
DEFINE_WRAPPER(Subscribe, subscribe, 0)
DEFINE_WRAPPER(Resubscribe, subscribe, 1)
DEFINE_WRAPPER(Unsubscribe, subscribe, 2)
void
Session::Request(const FunctionCallbackInfo<Value>& args)
{
EscapableHandleScope scope(args.GetIsolate());
if (args.Length() < 1 || !args[0]->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"Service URI string must be provided as first parameter.")));
}
if (args.Length() < 2 || !args[1]->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"String request name must be provided as second parameter.")));
}
if (args.Length() < 3 || !args[2]->IsObject()) {
RetThrowException(Exception::Error(NEW_STRING(
"Object containing request parameters must be provided "
"as third parameter.")));
}
if (args.Length() < 4 || !args[3]->IsInt32()) {
RetThrowException(Exception::Error(NEW_STRING(
"Integer correlation identifier must be provided "
"as fourth parameter.")));
}
if (args.Length() >= 5 && !args[4]->IsUndefined() &&
!args[4]->IsNull() && !args[4]->IsObject()) {
RetThrowException(Exception::Error(NEW_STRING(
"Optional identity must be an object.")));
}
if (args.Length() >= 6 && !args[5]->IsUndefined() &&
!args[5]->IsNull() && !args[5]->IsString()) {
RetThrowException(Exception::Error(NEW_STRING(
"Optional request label must be a string.")));
}
if (args.Length() > 6) {
RetThrowException(Exception::Error(NEW_STRING(
"Function expects at most six arguments.")));
}
int cidi = args[3]->Int32Value();
Session* session = ObjectWrap::Unwrap<Session>(args.This());
if (!session->d_session || session->d_destroy) {
RetThrowException(Exception::Error(NEW_STRING(
"Session has already been destroyed.")));
}
BLPAPI_EXCEPTION_TRY
Local<String> uri = args[0]->ToString();
String::Utf8Value uriv(uri);
blpapi::Service service = session->d_session->getService(*uriv);
Local<String> name = args[1]->ToString();
String::Utf8Value namev(name);