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| 1 | +/* |
| 2 | + * Unless explicitly stated otherwise all files in this repository are licensed under the Apache License Version 2.0. |
| 3 | + * This product includes software developed at Datadog (https://www.datadoghq.com/). |
| 4 | + * Copyright 2019-Present Datadog, Inc. |
| 5 | + */ |
| 6 | + |
| 7 | +import DatadogTrace |
| 8 | +import SwiftUI |
| 9 | + |
| 10 | +struct TraceContentView: View { |
| 11 | + @State private var operationName: String |
| 12 | + @State private var resourceName: String |
| 13 | + @State private var isError: Bool |
| 14 | + @State private var depth: Int |
| 15 | + @State private var childrenCount: Int |
| 16 | + @State private var childDelay: TimeInterval |
| 17 | + @State private var traceCount: Int |
| 18 | + @State private var isSending: Bool |
| 19 | + |
| 20 | + var tracer: OTTracer { Tracer.shared() } |
| 21 | + |
| 22 | + private let queue1 = DispatchQueue(label: "com.datadoghq.benchmark-tracing1") |
| 23 | + private let queue2 = DispatchQueue(label: "com.datadoghq.benchmark-tracing2") |
| 24 | + |
| 25 | + init() { |
| 26 | + operationName = "iOS Benchmark span operation" |
| 27 | + resourceName = "iOS Benchmark span resource" |
| 28 | + isError = false |
| 29 | + depth = 1 |
| 30 | + childrenCount = 0 |
| 31 | + childDelay = 1 |
| 32 | + traceCount = 0 |
| 33 | + isSending = false |
| 34 | + } |
| 35 | + |
| 36 | + var body: some View { |
| 37 | + VStack { |
| 38 | + Form { |
| 39 | + Section(header: Text("Span configuration")) { |
| 40 | + TextField("Operation name", text: $operationName) |
| 41 | + TextField("Resource name", text: $resourceName) |
| 42 | + Toggle("Is Error", isOn: $isError) |
| 43 | + .tint(.purple) |
| 44 | + } |
| 45 | + |
| 46 | + Section(header: Text("Complex span configuration")) { |
| 47 | + HStack { |
| 48 | + Text("Children count:") |
| 49 | + Spacer() |
| 50 | + TextField("Children count:", value: $childrenCount, formatter: NumberFormatter()) |
| 51 | + .textFieldStyle(RoundedBorderTextFieldStyle()) |
| 52 | + .frame(width: 80) |
| 53 | + .keyboardType(.numberPad) |
| 54 | + Stepper("", value: $childrenCount, in: 0 ... 100, step: 1) |
| 55 | + .frame(width: 80) |
| 56 | + } |
| 57 | + |
| 58 | + HStack { |
| 59 | + Text("Depth:") |
| 60 | + Spacer() |
| 61 | + TextField("Depth:", value: $depth, formatter: NumberFormatter()) |
| 62 | + .textFieldStyle(RoundedBorderTextFieldStyle()) |
| 63 | + .frame(width: 80) |
| 64 | + .keyboardType(.numberPad) |
| 65 | + Stepper("", value: $depth, in: 1 ... 100, step: 1) |
| 66 | + .frame(width: 80) |
| 67 | + } |
| 68 | + |
| 69 | + HStack { |
| 70 | + Text("Child delay:") |
| 71 | + Spacer() |
| 72 | + TextField("Child delay:", value: $childDelay, formatter: NumberFormatter()) |
| 73 | + .textFieldStyle(RoundedBorderTextFieldStyle()) |
| 74 | + .frame(width: 80) |
| 75 | + .keyboardType(.numberPad) |
| 76 | + Stepper("", value: $childDelay, in: 1 ... 100, step: 1) |
| 77 | + .frame(width: 80) |
| 78 | + } |
| 79 | + } |
| 80 | + |
| 81 | + Button(action: sendTrace) { |
| 82 | + Text("Send") |
| 83 | + .foregroundColor(.white) |
| 84 | + .padding() |
| 85 | + .frame(maxWidth: .infinity) |
| 86 | + .background(Color.purple) |
| 87 | + .cornerRadius(8) |
| 88 | + } |
| 89 | + .listRowBackground(EmptyView()) |
| 90 | + .listRowInsets(EdgeInsets()) |
| 91 | + |
| 92 | + VStack(alignment: .center) { |
| 93 | + ProgressView() |
| 94 | + .progressViewStyle(CircularProgressViewStyle()) |
| 95 | + .opacity(isSending ? 1 : 0) |
| 96 | + .padding() |
| 97 | + Text("Traces sent: \(traceCount)") |
| 98 | + .padding(.bottom, 16) |
| 99 | + } |
| 100 | + .frame(maxWidth: .infinity, alignment: .center) |
| 101 | + .listRowBackground(EmptyView()) |
| 102 | + .listRowInsets(EdgeInsets()) |
| 103 | + } |
| 104 | + } |
| 105 | + } |
| 106 | + |
| 107 | + /// Starts the tracing process based on the current configuration: |
| 108 | + /// 1. Creates a root span. with the given configuration. |
| 109 | + /// 2. Recursively generates child spans via `sendSpanTree`. |
| 110 | + /// 3. Finishes the root span and updates the trace counter. |
| 111 | + private func sendTrace() { |
| 112 | + DispatchQueue.main.async { |
| 113 | + isSending = true |
| 114 | + } |
| 115 | + |
| 116 | + queue1.async { [self] in |
| 117 | + let rootSpan = tracer.startSpan(operationName: operationName) |
| 118 | + rootSpan.setTag(key: SpanTags.resource, value: resourceName) |
| 119 | + |
| 120 | + if isError { |
| 121 | + rootSpan.log( |
| 122 | + fields: [ |
| 123 | + OTLogFields.event: "error", |
| 124 | + OTLogFields.errorKind: "Simulated error", |
| 125 | + OTLogFields.message: "Describe what happened", |
| 126 | + OTLogFields.stack: "Foo.swift:42", |
| 127 | + ] |
| 128 | + ) |
| 129 | + } |
| 130 | + |
| 131 | + wait(seconds: 0.5) |
| 132 | + |
| 133 | + queue2.sync { |
| 134 | + sendSpanTree(parent: rootSpan, currentLevel: 0, maxDepth: depth) |
| 135 | + } |
| 136 | + |
| 137 | + wait(seconds: 0.5) |
| 138 | + rootSpan.finish() |
| 139 | + |
| 140 | + DispatchQueue.main.async { |
| 141 | + traceCount += 1 |
| 142 | + isSending = false |
| 143 | + } |
| 144 | + } |
| 145 | + } |
| 146 | + |
| 147 | + /// Recursively generates a tree of child spans starting from the given parent span, waiting for `childDelay` between span creation. |
| 148 | + /// If the current level reaches `maxDepth` or if `childrenCount` is 0, recursion stops. |
| 149 | + /// - Parameters: |
| 150 | + /// - parent: The parent span from which to create child spans. |
| 151 | + /// - currentLevel: The current depth level in the span tree. |
| 152 | + /// - maxDepth: The maximum depth (levels) for the span tree generation. |
| 153 | + private func sendSpanTree(parent: OTSpan, currentLevel: Int, maxDepth: Int) { |
| 154 | + guard currentLevel < maxDepth, childrenCount > 0 else { return } |
| 155 | + |
| 156 | + for i in 1 ... childrenCount { |
| 157 | + let childOperation = "\(operationName) - Child \(i) at level \(currentLevel + 1)" |
| 158 | + let childSpan = tracer.startSpan(operationName: childOperation, childOf: parent.context) |
| 159 | + wait(seconds: childDelay) |
| 160 | + |
| 161 | + sendSpanTree(parent: childSpan, currentLevel: currentLevel + 1, maxDepth: maxDepth) |
| 162 | + childSpan.finish() |
| 163 | + } |
| 164 | + } |
| 165 | + |
| 166 | + private func wait(seconds: TimeInterval) { |
| 167 | + Thread.sleep(forTimeInterval: seconds) |
| 168 | + } |
| 169 | +} |
| 170 | + |
| 171 | +#Preview { |
| 172 | + TraceContentView() |
| 173 | +} |
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