Add exports to relay-runtime to make available in relay-experimental

Summary:
relay-experimental modules had to import modules directly from the internals of relay-runtime since they weren't exported through the main index.js file.

This broke the react-relay@experimental package. To fix this, this commit exports the required files from relay-runtime

Reviewed By: yuzhi

Differential Revision: D18080925

fbshipit-source-id: 4a09aa0ccd64a7b4bef00d96655369a15fec2e73

packages/relay-experimental/preloadQuery.js

@@ -12,15 +12,15 @@
 'use strict';
 
 const ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment');
-const RelayReplaySubject = require('relay-runtime/util/RelayReplaySubject');
 
-const getRequestIdentifier = require('relay-runtime/util/getRequestIdentifier');
 const invariant = require('invariant');
 
 const {
   Environment,
   Observable,
+  ReplaySubject,
   createOperationDescriptor,
+  getRequestIdentifier,
 } = require('relay-runtime');
 
 import type {
@@ -52,7 +52,7 @@ type PendingQueryEntry =
       fetchKey: ?string | ?number,
       fetchPolicy: PreloadFetchPolicy,
       kind: 'network',
-      subject: RelayReplaySubject<GraphQLResponse>,
+      subject: ReplaySubject<GraphQLResponse>,
       subscription: Subscription,
     |}>
   | $ReadOnly<{|
@@ -157,7 +157,7 @@ function preloadQueryDeduped<TQuery: OperationType>(
       variables,
     );
     const source = network.execute(params, variables, {}, null, logRequestInfo);
-    const subject = new RelayReplaySubject();
+    const subject = new ReplaySubject();
     nextQueryEntry = {
       cacheKey,
       fetchKey,

packages/relay-runtime/index.js

@@ -33,6 +33,7 @@ const RelayOperationTracker = require('./store/RelayOperationTracker');
 const RelayProfiler = require('./util/RelayProfiler');
 const RelayQueryResponseCache = require('./network/RelayQueryResponseCache');
 const RelayRecordSource = require('./store/RelayRecordSource');
+const RelayReplaySubject = require('./util/RelayReplaySubject');
 const RelayStoreUtils = require('./store/RelayStoreUtils');
 const ViewerPattern = require('./store/ViewerPattern');
 
@@ -47,6 +48,7 @@ const fetchQueryInternal = require('./query/fetchQueryInternal');
 const getFragmentIdentifier = require('./util/getFragmentIdentifier');
 const getFragmentSpecIdentifier = require('./util/getFragmentSpecIdentifier');
 const getRelayHandleKey = require('./util/getRelayHandleKey');
+const getRequestIdentifier = require('./util/getRequestIdentifier');
 const isPromise = require('./util/isPromise');
 const isRelayModernEnvironment = require('./store/isRelayModernEnvironment');
 const isScalarAndEqual = require('./util/isScalarAndEqual');
@@ -218,6 +220,7 @@ module.exports = {
   QueryResponseCache: RelayQueryResponseCache,
   RecordSource: RelayRecordSource,
   Record: RelayModernRecord,
+  ReplaySubject: RelayReplaySubject,
   Store: RelayModernStore,
 
   areEqualSelectors: RelayModernSelector.areEqualSelectors,
@@ -238,6 +241,7 @@ module.exports = {
   getPluralSelector: RelayModernSelector.getPluralSelector,
   getRefetchableFragment: RelayModernGraphQLTag.getRefetchableFragment,
   getRequest: RelayModernGraphQLTag.getRequest,
+  getRequestIdentifier: getRequestIdentifier,
   getSelector: RelayModernSelector.getSelector,
   getSelectorsFromObject: RelayModernSelector.getSelectorsFromObject,
   getSingularSelector: RelayModernSelector.getSingularSelector,