前幾節開發Dapr應用程序時,我們使用 dapr cli 來啓動dapr服務,就像這樣:
dapr run --dapr-http-port 3501 --app-port 5001 --app-id frontend dotnet .\FrontEnd\bin\Debug\net5.0\FrontEnd.dll
如果你想要通過dapr調試服務呢?在這裏使用 dapr 運行時(daprd) 來幫助實現這一點。具體原理就是先從命令行中運行符合正確參數的 daprd,然後啓動您的代碼並附加調試器。
1.配置launch.json
vscode打開項目,並創建launch.json
修改launch.json的preLaunchTask,自定義名字,preLaunchTask將引用在 tasks.json 文件中定義的任務。
{ // Use IntelliSense to learn about possible attributes. // Hover to view descriptions of existing attributes. // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "name": "Frontend-.NET Core Launch (web)", "type": "coreclr", "request": "launch", //"preLaunchTask": "build", "preLaunchTask": "daprd-frontend", "program": "${workspaceFolder}/FrontEnd/bin/Debug/net5.0/FrontEnd.dll", "args": [], "cwd": "${workspaceFolder}/FrontEnd", "stopAtEntry": false, "serverReadyAction": { "action": "openExternally", "pattern": "\\bNow listening on:\\s+(https?://\\S+)" }, "env": { "ASPNETCORE_ENVIRONMENT": "Development" }, "sourceFileMap": { "/Views": "${workspaceFolder}/Views" } }, { "name": ".NET Core Attach", "type": "coreclr", "request": "attach" } ] }
2.配置task.json
需要在task.json文件中定義一個 daprd task和問題匹配器(problem matcher)。 這裏有兩個通過上述 preLaunchTask 成員引用。 在 dpred -frontend task下,還有一個dependsOn成員,它引用build任務,以確保最新的代碼正在運行/調試。 用了 problemMatcher,這樣當 daprd 進程啓動和運行時,VSCode 就能夠知道。
{ "version": "2.0.0", "tasks": [ { "label": "build", "command": "dotnet", "type": "process", "args": [ "build", "${workspaceFolder}/FrontEnd/FrontEnd.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, { "label": "publish", "command": "dotnet", "type": "process", "args": [ "publish", "${workspaceFolder}/FrontEnd/FrontEnd.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, { "label": "watch", "command": "dotnet", "type": "process", "args": [ "watch", "run", "${workspaceFolder}/FrontEnd/FrontEnd.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, { "label": "daprd-frontend", "command": "daprd", "args": [ "-app-id", "frontend", "-app-port", "5001", "-dapr-http-port", "3501", "-placement-host-address", "localhost:6050", "-components-path", "C:\\Users\\chesterychen\\.dapr\\components" ], "isBackground": true, "problemMatcher": { "pattern": [ { "regexp": ".", "file": 1, "location": 2, "message": 3 } ], "background": { "beginsPattern": "^.*starting Dapr Runtime.*", "endsPattern": "^.*waiting on port.*" } }, "dependsOn": "build" }, ] }
因爲沒有使用 dapr run* cli 命令, 所以運行 daprd list 命令將不會顯示當前正在運行的應用列表。
3.調試
在StateController.GetAsync中新增斷點,運行並調用http://192.168.43.94:3501/v1.0/invoke/frontend/method/State。
4.不用vscode調試
cmd運行以下命令,監聽5001端口
daprd run -dapr-http-port 3501 -app-port 5001 -app-id frontend -placement-host-address localhost:6050 -components-path C:\\Users\\chesterychen\\.dapr\\components
然後直接vs運行項目,即可調試