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# Conflicts: # DXFeedFramework/Native/Utils/NativeTimeUtil.swift
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98 changes: 98 additions & 0 deletions
98
Samples/Playgrounds/DxFeedReconnectSample.playground/Contents.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| import Cocoa | ||
| import PlaygroundSupport | ||
| import DXFeedFramework | ||
|
|
||
| // Empty Event Listener with handler | ||
| class Listener: DXEventListener, Hashable { | ||
|
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| static func == (lhs: Listener, rhs: Listener) -> Bool { | ||
| lhs === rhs | ||
| } | ||
|
|
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| func hash(into hasher: inout Hasher) { | ||
| hasher.combine("\(self):\(stringReference(self))") | ||
| } | ||
| var callback: ([MarketEvent]) -> Void = { _ in } | ||
|
|
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| func receiveEvents(_ events: [MarketEvent]) { | ||
| self.callback(events) | ||
| } | ||
|
|
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| init(overrides: (Listener) -> Listener) { | ||
| _ = overrides(self) | ||
| } | ||
| } | ||
|
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| // Empty Endpoint Listener with handler | ||
| class EndpoointStateListener: DXEndpointListener, Hashable { | ||
| func endpointDidChangeState(old: DXFeedFramework.DXEndpointState, new: DXFeedFramework.DXEndpointState) { | ||
| callback(old, new) | ||
| } | ||
|
|
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| static func == (lhs: EndpoointStateListener, rhs: EndpoointStateListener) -> Bool { | ||
| lhs === rhs | ||
| } | ||
|
|
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| func hash(into hasher: inout Hasher) { | ||
| hasher.combine("\(self):\(stringReference(self))") | ||
| } | ||
| var callback: (DXEndpointState, DXEndpointState) -> Void = { _, _ in } | ||
|
|
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| init(overrides: (EndpoointStateListener) -> EndpoointStateListener) { | ||
| _ = overrides(self) | ||
| } | ||
| } | ||
|
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| // Demonstrates how to connect to an endpoint, subscribe to market data events, | ||
| // handle reconnections and re-subscribing. | ||
| let address = "demo.dxfeed.com:7300" // The address of the DxFeed endpoint. | ||
| let symbol = "ETH/USD:GDAX" // The symbol for which we want to receive quotes. | ||
|
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| // Create new endpoint and add a listener for state changes. | ||
| let endpoint = try DXEndpoint.getInstance() | ||
| let stateListener = EndpoointStateListener { listener in | ||
| listener.callback = { old, new in | ||
| print("Connection state changed: \(old) -> \(new)") | ||
| } | ||
| return listener | ||
| } | ||
| endpoint.add(listener: stateListener) | ||
|
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| // Connect to the endpoint using the specified address. | ||
| try endpoint.connect(address) | ||
|
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| // Create a subscription for Quote events. | ||
| let subscriptionQuote = try endpoint.getFeed()?.createSubscription(Quote.self) | ||
| // Listener must be attached before symbols are added. | ||
| let listener = Listener { listener in | ||
| listener.callback = { events in | ||
| events.forEach { event in | ||
| print(event.toString()) | ||
| } | ||
| } | ||
| return listener | ||
| } | ||
| try subscriptionQuote?.add(listener: listener) | ||
|
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| // Add the specified symbol to the subscription. | ||
| try subscriptionQuote?.addSymbols(symbol) | ||
|
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| // Wait for five seconds to allow some quotes to be received. | ||
| Thread.sleep(forTimeInterval: 5) | ||
|
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| // Disconnect from the endpoint. | ||
| try endpoint.disconnect() | ||
|
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| // Wait for another five seconds to ensure quotes stop coming in. | ||
| Thread.sleep(forTimeInterval: 5) | ||
|
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| // Reconnect to the endpoint. | ||
| // The subscription is automatically re-subscribed, and quotes start coming into the listener again. | ||
| // Another address can also be passed on. | ||
| try endpoint.connect(address) | ||
|
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| // infinity execution | ||
| PlaygroundPage.current.needsIndefiniteExecution = true | ||
|
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| // to finish execution run this line | ||
| PlaygroundPage.current.finishExecution() |
4 changes: 4 additions & 0 deletions
4
Samples/Playgrounds/DxFeedReconnectSample.playground/contents.xcplayground
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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> |
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