JSON cache for account offers and account lines.

modules/ripple_client/ripple_client.cpp

@@ -37,6 +37,7 @@
 #include "src/cpp/ripple/ripple_InfoSub.h"
 
 // Order and indentation reflect the hierarchy of dependencies
+    #include   "src/cpp/ripple/JSONCache.h"
     #include   "src/cpp/ripple/ripple_HashedObject.h"
     #include   "src/cpp/ripple/ripple_SHAMapItem.h"
     #include   "src/cpp/ripple/ripple_SHAMapNode.h"

modules/ripple_main/ripple_main.cpp

@@ -185,6 +185,7 @@
 #include "src/cpp/ripple/LedgerEntrySet.h"
 #include "src/cpp/ripple/TransactionEngine.h"
 #include "src/cpp/ripple/ripple_CanonicalTXSet.h"
+#include "src/cpp/ripple/JSONCache.h"
 
 #include "src/cpp/ripple/ripple_LedgerHistory.h"
 #include "src/cpp/ripple/LedgerMaster.h"

src/cpp/ripple/NetworkOPs.cpp

@@ -17,7 +17,7 @@ NetworkOPs::NetworkOPs(boost::asio::io_service& io_service, LedgerMaster* pLedge
 	mFeatureBlocked(false),
 	mNetTimer(io_service), mLedgerMaster(pLedgerMaster), mCloseTimeOffset(0), mLastCloseProposers(0),
 	mLastCloseConvergeTime(1000 * LEDGER_IDLE_INTERVAL), mLastCloseTime(0), mLastValidationTime(0),
-	mFetchPack("FetchPack", 2048, 20), mLastFetchPack(0), mFetchSeq(static_cast<uint32>(-1)),
+	mJSONCache(120), mFetchPack("FetchPack", 2048, 20), mLastFetchPack(0), mFetchSeq(static_cast<uint32>(-1)),
 	mLastLoadBase(256), mLastLoadFactor(256)
 {
 }
@@ -2074,6 +2074,7 @@ void NetworkOPs::makeFetchPack(Job&, boost::weak_ptr<Peer> wPeer,
 void NetworkOPs::sweepFetchPack()
 {
 	mFetchPack.sweep();
+	mJSONCache.sweep();
 }
 
 void NetworkOPs::addFetchPack(uint256 const& hash, boost::shared_ptr< Blob >& data)

src/cpp/ripple/NetworkOPs.h

@@ -176,6 +176,16 @@ public:
 	int getFetchSize();
 	void sweepFetchPack();
 
+	float getJSONHitRate()				{ return mJSONCache.getHitRate(); }
+	int getJSONEntries()				{ return mJSONCache.getCount(); }
+
+	void storeJSONCache(int operation, const uint256& ledger, const uint160& object,
+		const boost::shared_ptr<Json::Value>& data)
+	{ mJSONCache.storeEntry(operation, ledger, object, data); }
+
+	boost::shared_ptr<Json::Value> getJSONCache(int operation, const uint256& ledger, const uint160& object)
+	{ return mJSONCache.getEntry(operation, ledger, object); }
+
 	// network state machine
 	void checkState(const boost::system::error_code& result);
 	void switchLastClosedLedger(Ledger::pointer newLedger, bool duringConsensus); // Used for the "jump" case
@@ -303,6 +313,8 @@ private:
 	subMapType											mSubTransactions;		// all accepted transactions
 	subMapType											mSubRTTransactions;		// all proposed and accepted transactions
 
+	JSONCache<UptimeTimerAdapter>						mJSONCache;
+
 	TaggedCache< uint256, Blob , UptimeTimerAdapter >	mFetchPack;
 	uint32												mLastFetchPack;
 	uint32												mFetchSeq;

src/cpp/ripple/RPCHandler.cpp

@@ -1049,8 +1049,12 @@ Json::Value RPCHandler::doAccountLines(Json::Value jvRequest, int& cost, ScopedL
 	if (!lpLedger)
 		return jvResult;
 
+	bool bUnlocked = false;
 	if (lpLedger->isImmutable())
+	{
 		MasterLockHolder.unlock();
+		bUnlocked = true;
+	}
 
 	if (!jvRequest.isMember("account"))
 		return rpcError(rpcINVALID_PARAMS);
@@ -1088,9 +1092,16 @@ Json::Value RPCHandler::doAccountLines(Json::Value jvRequest, int& cost, ScopedL
 	{
 		jvResult["account"]	= raAccount.humanAccountID();
 
+		boost::shared_ptr<Json::Value> jvsLines =
+			theApp->getOPs().getJSONCache(JC_OP_ACCOUNT_LINES, lpLedger->getHash(), raAccount.getAccountID());
+
+		if (!jvsLines)
+		{
+			jvsLines = boost::make_shared<Json::Value>(Json::arrayValue);
+			Json::Value& jsonLines = *jvsLines;
+
 			AccountItems rippleLines(raAccount.getAccountID(), lpLedger, AccountItem::pointer(new RippleState()));
 
-		Json::Value&	jsonLines = (jvResult["lines"] = Json::arrayValue);
 			BOOST_FOREACH(AccountItem::ref item, rippleLines.getItems())
 			{
 				RippleState* line=(RippleState*)item.get();
@@ -1114,6 +1125,14 @@ Json::Value RPCHandler::doAccountLines(Json::Value jvRequest, int& cost, ScopedL
 					jPeer["quality_out"]	= static_cast<Json::UInt>(line->getQualityOut());
 				}
 			}
+
+			theApp->getOPs().storeJSONCache(JC_OP_ACCOUNT_LINES, lpLedger->getHash(),
+				raAccount.getAccountID(), jvsLines);
+		}
+		if (!bUnlocked)
+			MasterLockHolder.unlock();
+
+		jvResult["lines"] = *jvsLines;
 	}
 	else
 	{
@@ -1149,8 +1168,12 @@ Json::Value RPCHandler::doAccountOffers(Json::Value jvRequest, int& cost, Scoped
 	if (!lpLedger)
 		return jvResult;
 
+	bool bUnlocked = false;
 	if (lpLedger->isImmutable())
+	{
 		MasterLockHolder.unlock();
+		bUnlocked = true;
+	}
 
 	if (!jvRequest.isMember("account"))
 		return rpcError(rpcINVALID_PARAMS);
@@ -1172,11 +1195,22 @@ Json::Value RPCHandler::doAccountOffers(Json::Value jvRequest, int& cost, Scoped
 	if (bIndex)
 		jvResult["account_index"]	= iIndex;
 
-	if (lpLedger->hasAccount(raAccount))
+	if (!lpLedger->hasAccount(raAccount))
-		lpLedger->visitAccountItems(raAccount.getAccountID(),
+		return rpcError(rpcACT_NOT_FOUND);
-			BIND_TYPE(&offerAdder, boost::ref(jvResult["offers"] = Json::arrayValue), P_1));
+
-	else
+	boost::shared_ptr<Json::Value> jvsOffers =
-		jvResult	= rpcError(rpcACT_NOT_FOUND);
+		theApp->getOPs().getJSONCache(JC_OP_ACCOUNT_OFFERS, lpLedger->getHash(), raAccount.getAccountID());
+
+	if (!jvsOffers)
+	{
+		jvsOffers = boost::make_shared<Json::Value>(Json::arrayValue);
+		lpLedger->visitAccountItems(raAccount.getAccountID(), BIND_TYPE(&offerAdder, boost::ref(*jvsOffers), P_1));
+		theApp->getOPs().storeJSONCache(JC_OP_ACCOUNT_OFFERS, lpLedger->getHash(), raAccount.getAccountID(), jvsOffers);
+	}
+	if (!bUnlocked)
+		MasterLockHolder.unlock();
+
+	jvResult["offers"] = *jvsOffers;
 
 	return jvResult;
 }
@@ -2343,6 +2377,8 @@ Json::Value RPCHandler::doGetCounts(Json::Value jvRequest, int& cost, ScopedLock
 	ret["node_hit_rate"] = theApp->getHashedObjectStore().getCacheHitRate();
 	ret["ledger_hit_rate"] = theApp->getLedgerMaster().getCacheHitRate();
 	ret["AL_hit_rate"] = AcceptedLedger::getCacheHitRate();
+	ret["JC_hit_rate"] = theApp->getOPs().getJSONHitRate();
+	ret["JC_size"] = theApp->getOPs().getJSONEntries();
 
 	ret["fullbelow_size"] = SHAMap::getFullBelowSize();