add sample:

WriteTapeFile

DXFeedFramework.xcodeproj/project.pbxproj

@@ -542,6 +542,7 @@
 		6401A5142A5820C9009BA686 /* DXFeedAllTests.xctestplan */ = {isa = PBXFileReference; lastKnownFileType = text; path = DXFeedAllTests.xctestplan; sourceTree = "<group>"; };
 		6406F2562AD9820700B58C42 /* NativePublisher.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NativePublisher.swift; sourceTree = "<group>"; };
 		6406F25A2AD987EB00B58C42 /* PublisherTest.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PublisherTest.swift; sourceTree = "<group>"; };
+		6408BB712B1F2D14005D7797 /* WriteTapeFile.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = WriteTapeFile.playground; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.swift; };
 		64098F492ACD6AF20020D741 /* SceneDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SceneDelegate.swift; sourceTree = "<group>"; };
 		64098F4C2ACD73820020D741 /* PerfTestEventListener.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PerfTestEventListener.swift; sourceTree = "<group>"; };
 		64098F542ACD7E940020D741 /* PerformanceMetricsPrinter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PerformanceMetricsPrinter.swift; sourceTree = "<group>"; };
@@ -1008,6 +1009,7 @@
 				644C528D2B1E1CB8002C034C /* ConvertTapeFile.playground */,
 				644C52902B1E345E002C034C /* DxFeedSample.playground */,
 				6435EE3C2B1F1E9200E8496C /* PrintQuoteEvents.playground */,
+				6408BB712B1F2D14005D7797 /* WriteTapeFile.playground */,
 			);
 			path = Playgrounds;
 			sourceTree = "<group>";
@@ -1467,6 +1469,8 @@
 				64262CCB2A4DA64700BA6BA3 /* Packages */,
 				803BAC0E29BFA50700FFAB1C /* Products */,
 				803BAC2529BFA67C00FFAB1C /* Frameworks */,
+				C825416ED3A0E46B52373A8F /* xcschemes */,
+				C8254B3C92B620BC72193130 /* 8.4 */,
 			);
 			sourceTree = "<group>";
 		};
@@ -1614,6 +1618,62 @@
 			path = Property;
 			sourceTree = "<group>";
 		};
+		C825416ED3A0E46B52373A8F /* xcschemes */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			name = xcschemes;
+			path = DXFeedFramework.xcodeproj/project.xcworkspace/xcuserdata/akosylo.xcuserdatad/xcschemes;
+			sourceTree = "<group>";
+		};
+		C82542FFD107EFFF8F3ADE0D /* checksums */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			path = checksums;
+			sourceTree = "<group>";
+		};
+		C82549AC99CBAC409C9F0CC3 /* vcsMetadata */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			path = vcsMetadata;
+			sourceTree = "<group>";
+		};
+		C8254B3C92B620BC72193130 /* 8.4 */ = {
+			isa = PBXGroup;
+			children = (
+				C8254BF430409866B626ED3C /* fileChanges */,
+				C82549AC99CBAC409C9F0CC3 /* vcsMetadata */,
+				C82542FFD107EFFF8F3ADE0D /* checksums */,
+				C8254EE12256EB1C633A366E /* fileHashes */,
+				C8254FDB0F46F8BE3FC99B3D /* dependencies-accessors */,
+			);
+			name = 8.4;
+			path = .gradle/8.4;
+			sourceTree = "<group>";
+		};
+		C8254BF430409866B626ED3C /* fileChanges */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			path = fileChanges;
+			sourceTree = "<group>";
+		};
+		C8254EE12256EB1C633A366E /* fileHashes */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			path = fileHashes;
+			sourceTree = "<group>";
+		};
+		C8254FDB0F46F8BE3FC99B3D /* dependencies-accessors */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			path = "dependencies-accessors";
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */

README.md

@@ -246,11 +246,11 @@ sudo /usr/bin/xattr -r -d com.apple.quarantine <directory_with_tools>
 
 ## Samples
 
-- [x] ConvertTapeFile demonstrates how to convert one tape file to another tape file with optional intermediate processing or filtering
-- [x] DxFeedFileParser is a simple demonstration of how events are read form a tape file
-- [x] DxFeedSample is a simple demonstration of how to create multiple event listeners and subscribe to `Quote` and `Trade` events
-- [x] PrintQuoteEvents is a simple demonstration of how to subscribe to the `Quote` event, using a `DxFeed` instance singleton and `dxfeed.properties` file
-- [ ] WriteTapeFile is a simple demonstration of how to write events to a tape file
+- [x] [ConvertTapeFile](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Playgrounds/ConvertTapeFile.playground/Contents.swift) demonstrates how to convert one tape file to another tape file with optional intermediate processing or filtering
+- [x] [DxFeedFileParser](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Playgrounds/DxFeedFileParser.playground/Contents.swift) is a simple demonstration of how events are read form a tape file
+- [x] [DxFeedSample](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Playgrounds/DxFeedSample.playground/Contents.swift) is a simple demonstration of how to create multiple event listeners and subscribe to `Quote` and `Trade` events
+- [x] [PrintQuoteEvents](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Playgrounds/PrintQuoteEvents.playground/Contents.swift) is a simple demonstration of how to subscribe to the `Quote` event, using a `DxFeed` instance singleton and `dxfeed.properties` file
+- [x] [WriteTapeFile](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Playgrounds/WriteTapeFile.playground/Contents.swift) is a simple demonstration of how to write events to a tape file
 - [x] [DxFeedIpfConnect](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Tools/IpfConnect.swift) is a simple demonstration of how to get Instrument Profiles
 - [x] [DXFeedLiveIpfSample](https://github.com/dxFeed/dxfeed-graal-swift-api/blob/swift/Samples/Tools/LiveIpfSample.swift)
 is a simple demonstration of how to get live updates for Instrument Profiles

Samples/Playgrounds/ConvertTapeFile.playground/Contents.swift

@@ -23,13 +23,14 @@ class Listener: DXEventListener, Hashable {
 }
 
 
-let inputFilePath = Bundle.main.path(forResource: "ConvertTapeFile.in", ofType: nil)
-let tempDirectory = NSTemporaryDirectory()
-let outputFilePath = NSURL.fileURL(withPathComponents: [tempDirectory, "ConvertTapeFile.out"])?.path
+guard let inputFilePath = Bundle.main.path(forResource: "ConvertTapeFile.in", ofType: nil),
+      let outputFilePath = NSURL.fileURL(withPathComponents: [NSTemporaryDirectory(), "ConvertTapeFile.out"])?.path else {
+    fatalError("Wrong path to output file")
+}
 
 // Determine input and output tapes and specify appropriate configuration parameters.
-let inputAddress = "file:\(inputFilePath ?? "")[readAs=stream_data,speed=max]"
-let outputAddress = "tape:\(outputFilePath ?? "" )[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()
@@ -39,7 +40,7 @@ let inputEndpoint = try DXEndpoint.builder()
     .build()
 
 // Create output endpoint configured for tape writing.
-var outputEndpoint = try DXEndpoint.builder()
+let outputEndpoint = try DXEndpoint.builder()
     .withRole(.streamPublisher) // Prevents event conflation and loss due to buffer overflow.
     .withProperty(DXEndpoint.Property.wildcardEnable.rawValue, "true") // Enables wildcard subscription.
     .withProperty(DXEndpoint.Property.eventTime.rawValue, "true") // Use provided event times.
@@ -99,3 +100,4 @@ ConvertTapeFile:
 has been successfully tapped to
 \(outputAddress)
 """)
+

Samples/Playgrounds/DxFeedFileParser.playground/Contents.swift

@@ -23,14 +23,14 @@ class Listener: DXEventListener, Hashable {
 }
 
 
-var file: String = ""
-var types: [EventCode] = [.quote]
-var symbols = "AAPL"
+let file: String = ""
+let types: [EventCode] = [.quote]
+let symbols = "AAPL"
 var eventCounter = 0
 
 // Create endpoint specifically for file parsing.
-var endpoint = try DXEndpoint.create(.streamFeed)
-var feed = endpoint.getFeed()
+let endpoint = try DXEndpoint.create(.streamFeed)
+let feed = endpoint.getFeed()
 
 // Subscribe to a specified event and symbol.
 var sub = try feed?.createSubscription(types)

Samples/Playgrounds/WriteTapeFile.playground/Contents.swift

@@ -0,0 +1,49 @@
+import Cocoa
+import DXFeedFramework
+
+// Write events to a tape file.
+
+// Create an appropriate endpoint.
+let endpoint = try DXEndpoint.builder()
+// Is required for tape connector to be able to receive everything.
+    .withProperty(DXEndpoint.Property.wildcardEnable.rawValue, "true")
+    .withRole(.publisher)
+    .build()
+
+guard let outputFilePath = NSURL.fileURL(withPathComponents: [NSTemporaryDirectory(), "WriteTapeFile.out.txt"])?.path else {
+    fatalError("Wrong path to output file")
+}
+
+// Connect to the address, remove [format=text] or change on [format=binary] for binary format
+try endpoint.connect("tape:\(outputFilePath)[format=text]")
+// Get publisher.
+let publisher = endpoint.getPublisher()
+
+// Creates new Quote market events.
+let quote1 = Quote("TEST1")
+Optional(quote1).map {
+    $0.bidPrice = 10.1
+    $0.askPrice = 10.2
+}
+let quote2 = Quote("TEST2")
+Optional(quote2).map {
+    $0.bidPrice = 17.1
+    $0.askPrice = 18.1
+}
+
+// Publish events.
+try publisher?.publish(events: [quote1, quote2])
+
+// Wait until all data is written, close, and wait until it closes.
+try endpoint.awaitProcessed()
+try endpoint.closeAndAWaitTermination()
+
+
+// Just print content of result file
+let resultTxtFile = try NSString(contentsOf: URL(filePath: outputFilePath), encoding: NSUTF8StringEncoding)
+print("""
+Result content of \(outputFilePath):
+\(resultTxtFile)
+""")
+
+

Samples/Playgrounds/WriteTapeFile.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>