add sample:

DxFeedSample

DXFeedFramework.xcodeproj/project.pbxproj

@@ -632,6 +632,7 @@
 		644BD7882A4475EF00A0BF99 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/MainAR.storyboard; sourceTree = "<group>"; };
 		644C528D2B1E1CB8002C034C /* ConvertTapeFile.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = ConvertTapeFile.playground; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.swift; };
 		644C528F2B1E1D73002C034C /* DxFeedFileParser.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = DxFeedFileParser.playground; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.swift; };
+		644C52902B1E345E002C034C /* DxFeedSample.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = DxFeedSample.playground; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.swift; };
 		644FE5D02AC1F34000580E3A /* LatencyMetricsPrinter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LatencyMetricsPrinter.swift; sourceTree = "<group>"; };
 		645A34942A937C7200709F29 /* BinaryInteger+Ext.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "BinaryInteger+Ext.swift"; sourceTree = "<group>"; };
 		645BE8512AC31E7C0028243D /* PerfTestTool.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PerfTestTool.swift; sourceTree = "<group>"; };
@@ -1004,6 +1005,7 @@
 			children = (
 				644C528F2B1E1D73002C034C /* DxFeedFileParser.playground */,
 				644C528D2B1E1CB8002C034C /* ConvertTapeFile.playground */,
+				644C52902B1E345E002C034C /* DxFeedSample.playground */,
 			);
 			path = Playgrounds;
 			sourceTree = "<group>";

DXFeedFrameworkTests/DXConnectionTest.swift

@@ -78,4 +78,45 @@ final class DXConnectionTest: XCTestCase {
         }
     }
 
+    func testQuote() throws {
+        class Listener: DXEventListener, Hashable {
+
+            static func == (lhs: Listener, rhs: Listener) -> Bool {
+                lhs === rhs
+            }
+
+            func hash(into hasher: inout Hasher) {
+                hasher.combine("\(self):\(stringReference(self))")
+            }
+            var callback: ([MarketEvent]) -> Void = { _ in }
+
+            func receiveEvents(_ events: [MarketEvent]) {
+                self.callback(events)
+            }
+
+            init(overrides: (Listener) -> Listener) {
+                _ = overrides(self)
+            }
+        }
+
+
+        let symbol = "AAPL"
+        let endpoint = try DXEndpoint.builder()
+            .withProperty("dxfeed.address", "demo.dxfeed.com:7300")
+            .build()
+        let subscription = try endpoint
+            .getFeed()?
+            .createSubscription(EventCode.trade)
+        let listener = Listener { listener in
+            listener.callback = { events in
+                print(events)
+            }
+            return listener
+        }
+
+        try subscription?.add(listener: listener)
+        try subscription?.addSymbols(symbol)
+        wait(seconds: 10)
+    }
+
 }

Samples/Playgrounds/ConvertTapeFile.playground/Contents.swift

@@ -23,13 +23,13 @@ class Listener: DXEventListener, Hashable {
 }
 
 
-let paths = Bundle.main.path(forResource: "ConvertTapeFile.in", ofType: nil)
+let inputFilePath = Bundle.main.path(forResource: "ConvertTapeFile.in", ofType: nil)
 let tempDirectory = NSTemporaryDirectory()
-let fullURL = NSURL.fileURL(withPathComponents: [tempDirectory, "ConvertTapeFile.out"])?.path
+let outputFilePath = NSURL.fileURL(withPathComponents: [tempDirectory, "ConvertTapeFile.out"])?.path
 
 // Determine input and output tapes and specify appropriate configuration parameters.
-let inputAddress = "file:\(paths ?? "")[readAs=stream_data,speed=max]"
-let outputAddress = "tape:\(fullURL ?? "" )[saveAs=stream_data,format=text]"
+let inputAddress = "file:\(inputFilePath ?? "")[readAs=stream_data,speed=max]"
+let outputAddress = "tape:\(outputFilePath ?? "" )[saveAs=stream_data,format=text]"
 
 // Create input endpoint configured for tape reading.
 let inputEndpoint = try DXEndpoint.builder()
@@ -93,4 +93,9 @@ try inputEndpoint.closeAndAWaitTermination()
 try outputEndpoint.awaitProcessed()
 try outputEndpoint.closeAndAWaitTermination()
 
-print("ConvertTapeFile: \(inputAddress) has been successfully tapped to  \(outputAddress)")
+print("""
+ConvertTapeFile:
+\(inputAddress)
+has been successfully tapped to
+\(outputAddress)
+""")

Samples/Playgrounds/DxFeedSample.playground/Contents.swift

@@ -0,0 +1,69 @@
+import DXFeedFramework
+import Foundation
+import Cocoa
+import PlaygroundSupport
+
+//Empty Listener with handler
+class Listener: DXEventListener, Hashable {
+
+    static func == (lhs: Listener, rhs: Listener) -> Bool {
+        lhs === rhs
+    }
+
+    func hash(into hasher: inout Hasher) {
+        hasher.combine("\(self):\(stringReference(self))")
+    }
+    var callback: ([MarketEvent]) -> Void = { _ in }
+
+    func receiveEvents(_ events: [MarketEvent]) {
+        self.callback(events)
+    }
+
+    init(overrides: (Listener) -> Listener) {
+        _ = overrides(self)
+    }
+}
+
+/// Creates multiple event listener and subscribe to Quote and Trade events.
+/// Use default DXFeed instance for that data feed address is defined by "dxfeed.properties" file.
+let symbol = "AAPL"
+
+let propertiesFilePath = Bundle.main.path(forResource: "dxfeed.properties", ofType: nil)
+try SystemProperty.setProperty(DXEndpoint.Property.properties.rawValue, propertiesFilePath ?? "")
+
+
+
+let subscription = try DXEndpoint.getInstance()
+    .getFeed()?
+    .createSubscription(EventCode.quote)
+let listener = Listener { listener in
+    listener.callback = { events in
+        events.forEach { event in
+            print("Mid = \((event.quote.bidPrice + event.quote.askPrice) / 2)")
+        }
+    }
+    return listener
+}
+try subscription?.add(listener: listener)
+try subscription?.addSymbols(symbol)
+
+let subscriptionTrade = try DXEndpoint.getInstance()
+    .getFeed()?
+    .createSubscription([EventCode.trade, EventCode.quote])
+let listenerTrade = Listener { listener in
+    listener.callback = { events in
+        events.forEach { event in
+            print(event.toString())
+        }
+    }
+    return listener
+}
+try subscriptionTrade?.add(listener: listenerTrade)
+try subscriptionTrade?.addSymbols(symbol)
+
+
+// infinity execution
+PlaygroundPage.current.needsIndefiniteExecution = true
+
+// to finish execution run this line
+PlaygroundPage.current.finishExecution()

Samples/Playgrounds/DxFeedSample.playground/Resources/dxfeed.properties

@@ -0,0 +1,2 @@
+# Connection address for an endpoint with role Feed and OnDemandFeed.
+dxfeed.address=demo.dxfeed.com:7300

Samples/Playgrounds/DxFeedSample.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>