Optionally exclude initial data from all trade websockets, using query string parameter excludeInitialData=true

Due to the large amount of data, it can take some time for the request to be processed and data to be transferred. It may make more sense to load the initial state from the standard API, and just use the websockets for updates.

src/main/java/org/qortal/api/websocket/TradeBotWebSocket.java

@@ -2,10 +2,7 @@ package org.qortal.api.websocket;
 
 import java.io.IOException;
 import java.io.StringWriter;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.stream.Collectors;
 
 import org.eclipse.jetty.websocket.api.Session;
@@ -85,6 +82,7 @@ public class TradeBotWebSocket extends ApiWebSocket implements Listener {
 	@Override
 	public void onWebSocketConnect(Session session) {
 		Map<String, List<String>> queryParams = session.getUpgradeRequest().getParameterMap();
+		final boolean excludeInitialData = queryParams.get("excludeInitialData") != null;
 
 		List<String> foreignBlockchains = queryParams.get("foreignBlockchain");
 		final String foreignBlockchain = foreignBlockchains == null ? null : foreignBlockchains.get(0);
@@ -98,15 +96,22 @@ public class TradeBotWebSocket extends ApiWebSocket implements Listener {
 		// save session's preferred blockchain (if any)
 		sessionBlockchain.put(session, foreignBlockchain);
 
-		// Send all known trade-bot entries
+
+
+		// Maybe send all known trade-bot entries
 		try (final Repository repository = RepositoryManager.getRepository()) {
-			List<TradeBotData> tradeBotEntries = repository.getCrossChainRepository().getAllTradeBotData();
+			List<TradeBotData> tradeBotEntries = new ArrayList<>();
+
+			// We might need to exclude the initial data from the response
+			if (!excludeInitialData) {
+				tradeBotEntries = repository.getCrossChainRepository().getAllTradeBotData();
 
 				// Optional filtering
 				if (foreignBlockchain != null)
 					tradeBotEntries = tradeBotEntries.stream()
 							.filter(tradeBotData -> tradeBotData.getForeignBlockchain().equals(foreignBlockchain))
 							.collect(Collectors.toList());
+			}
 
 			if (!sendEntries(session, tradeBotEntries)) {
 				session.close(4002, "websocket issue");

src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java

@@ -173,6 +173,7 @@ public class TradeOffersWebSocket extends ApiWebSocket implements Listener {
 	public void onWebSocketConnect(Session session) {
 		Map<String, List<String>> queryParams = session.getUpgradeRequest().getParameterMap();
 		final boolean includeHistoric = queryParams.get("includeHistoric") != null;
+		final boolean excludeInitialData = queryParams.get("excludeInitialData") != null;
 
 		List<String> foreignBlockchains = queryParams.get("foreignBlockchain");
 		final String foreignBlockchain = foreignBlockchains == null ? null : foreignBlockchains.get(0);
@@ -189,6 +190,8 @@ public class TradeOffersWebSocket extends ApiWebSocket implements Listener {
 
 		List<CrossChainOfferSummary> crossChainOfferSummaries = new ArrayList<>();
 
+		// We might need to exclude the initial data from the response
+		if (!excludeInitialData) {
 			synchronized (cachedInfoByBlockchain) {
 				Collection<CachedOfferInfo> cachedInfos;
 
@@ -205,6 +208,7 @@ public class TradeOffersWebSocket extends ApiWebSocket implements Listener {
 						crossChainOfferSummaries.addAll(cachedInfo.historicSummaries.values());
 				}
 			}
+		}
 
 		if (!sendOfferSummaries(session, crossChainOfferSummaries)) {
 			session.close(4002, "websocket issue");

src/main/java/org/qortal/api/websocket/TradePresenceWebSocket.java

@@ -65,12 +65,16 @@ public class TradePresenceWebSocket extends ApiWebSocket implements Listener {
 	@Override
 	public void onWebSocketConnect(Session session) {
 		Map<String, List<String>> queryParams = session.getUpgradeRequest().getParameterMap();
+		final boolean excludeInitialData = queryParams.get("excludeInitialData") != null;
 
-		List<TradePresenceData> tradePresences;
+		List<TradePresenceData> tradePresences = new ArrayList<>();
 
+		// We might need to exclude the initial data from the response
+		if (!excludeInitialData) {
 			synchronized (currentEntries) {
 				tradePresences = List.copyOf(currentEntries.values());
 			}
+		}
 
 		if (!sendTradePresences(session, tradePresences)) {
 			session.close(4002, "websocket issue");