小编App*_*per的帖子

如果我按照这两个测试运行，我会收到错误消息。

第一次测试

@Rule
public GrpcCleanupRule grpcCleanup = new GrpcCleanupRule();

@Test
public void findAll() throws Exception {
    // Generate a unique in-process server name.
    String serverName = InProcessServerBuilder.generateName();

    // Create a server, add service, start, and register for automatic graceful shutdown.
    grpcCleanup.register(InProcessServerBuilder
            .forName(serverName)
            .directExecutor()
            .addService(new Data(mockMongoDatabase))
            .build()
            .start());

    // Create a client channel and register for automatic graceful shutdown.
    RoleServiceGrpc.RoleServiceBlockingStub stub = RoleServiceGrpc.newBlockingStub(
            grpcCleanup.register(InProcessChannelBuilder
                    .forName(serverName)
                    .directExecutor()
                    .build()));

    RoleOuter.Response response = stub.findAll(Empty.getDefaultInstance());
    assertNotNull(response);
}

第二次测试

@Test
public void testFindAll() {
    ManagedChannel channel …

创建了访问和错误管道或可写流，以便将 console.log 或 console.error 写入文件流。

var fs = require("fs");
var access = fs.createWriteStream('/node.access.log', { flags: 'a' });
var error = fs.createWriteStream('/node.error.log', { flags: 'a' });
process.stdout.pipe(access); // redirect stdout / stderr
process.stderr.pipe(error);

我的期望是每当我这样做console.log或console.error将其写入文件输出流时。

我遇到错误

Error: read ENOTCONN
    at Socket._read (net.js:528:20)
    at Socket.Readable.read (_stream_readable.js:457:10)
    at resume_ (_stream_readable.js:936:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:9)
Emitted 'error' event at:
    at emitErrorNT (internal/streams/destroy.js:91:8)
    at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
    at processTicksAndRejections (internal/process/task_queues.js:84:9) {
  errno: 'ENOTCONN',
  code: 'ENOTCONN',
  syscall: 'read'
}

遇到有关正常关闭 asp.net 核心应用程序的非常过时的信息，有人可以填写更新的信息。

用例：我想在应用程序退出时向 consul 注销。

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .ConfigureAppConfiguration((host, config) =>
        {
        })
        .UseStartup<Service>();

尝试使用从异步方法调用的挂起函数来实现对错误的优雅处理，如何捕获挂起方法引发的错误。

suspend fun findById(id: Long): User? {
    throw Exception("my exception") // intentionally throwing to simulate error situation.
    return userModel.findById(id) // IO, may throw an error
}

调用者部分，通过 IO 线程启动

GlobalScope.launch(Dispatchers.IO) {
    try {

        var userAsync: Deferred<User?>? = null
        arguments?.getLong("id")?.let {
            userAsync = async { viewModel?.findById(it) } // async for efficiency as i've other async methods too.
        }

        val data = userAsync?.await()

        withContext(Dispatchers.Main) {
            user = data // data binding, populating UI fields of user
        }
    } catch (exception: Exception) { …

简介：我将从JSON模式开始描述期望。请注意，这些角色带有嵌套的对象数组，我正在寻找一种“智能查询”，可以通过一个查询来获取它。

{
    "id": 1,
    "first": "John",
    "roles": [ // Expectation -> array of objects
        {
            "id": 1,
            "name": "admin"
        },
        {
            "id": 2,
            "name": "accounts"
        }
    ]
}

用户

+----+-------+
| id | first |
+----+-------+
|  1 | John  |
|  2 | Jane  |
+----+-------+

角色

+----+----------+
| id |   name   |
+----+----------+
|  1 | admin    |
|  2 | accounts |
|  3 | sales    |
+----+----------+

user_role

+---------+---------+
| user_id | role_id |
+---------+---------+
| …

我已经关注了这篇文章，但github上的代码无法编译，我认为教程已经过时了。( Configuration = builder.Build();) 抛出错误。那么如何访问从 docker 传递过来的 env 呢？

docker-compose

  myproj:
    image: mcr.microsoft.com/dotnet/core/sdk:2.2
    restart: on-failure
    working_dir: /MyProj
    command: bash -c "dotnet build MyProj.csproj && dotnet bin/Debug/netcoreapp2.2/MyProj.dll"
    ports:
      - 5001:5001
      - 5000:5000
    volumes:
      - "./MyProj:/MyProj"
    environment:
      DATABASE_HOST: database
      DATABASE_PASSWORD: Password

启动文件

public Service()
{
    Environment.GetEnvironmentVariable("DATABASE_PASSWORD"); // null
}

// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit …

我遇到了这个答案，我有兴趣使用 Fake 实现第二个答案。这是另一个。

我并没有真正理解那里的所有概念，我仍在阅读和理解文档，有人可以帮助使用我的代码，我正在尝试访问有关如何使用 Fake/Shim/Stub/Mock 的客户列表吗？

您也可以重写FindAll方法，以防万一它被重构以接受依赖项。

讨论后编辑

public class Data
{
    private Func<IDbConnection> Factory { get; }

    public Data(Func<IDbConnection> factory)
    {
        Factory = factory;
    }

    public IList<Customer> FindAll()
    {
        using (var connection = Factory.Invoke())
        {
            const string sql = "SELECT Id, Name FROM Customer";
            using (var command = new SqlCommand(sql, (SqlConnection) connection))
            {
                command.Connection.Open();
                using (var reader = command.ExecuteReader())
                {
                    IList<Customer> rows = new List<Customer>();
                    while (reader.Read())
                    {
                        rows.Add(new Customer
                        { …

这个问题与所有其他问题不同，因为这里可打包对象的列表是在外部通过Intent快速发送的，是在外部即时创建的。

问题：产品是可打包的，但自定义List<Product>不是。如何制作List Parcelable??

产品

public class Product implements Parcelable {

    public String id;
    public String name;

    public Product(String id, String name) {
        this.id = id;
        this.name = name;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    protected Product(Parcel in) {
        id = in.readString();
        name = in.readString();
    }

    public static final Creator<Product> CREATOR = new Creator<Product>() {
        @Override
        public Product createFromParcel(Parcel in) {
            return new Product(in);
        }

        @Override
        public Product[] newArray(int size) {
            return new Product[size]; …

我查找了这个问题的类似答案，但找不到任何答案。

public void update(String id, String user) {
    Document document = Document.parse(user);
    UpdateResult result = database.getCollection("user")
            .updateOne(Filters.eq("_id", new ObjectId(id)), document);

    System.out.println(result);
}

我的 JSON 负载如下所示。

{
    "first": "John",
    "last": "Doe",
    "email": "john@example.com",
}

错误

首先无效的 BSON 字段名称

如果我从有效负载中删除第一个，它会反对最后一个，依此类推。

如何通过docker-composeSQL脚本文件为SQL Server指定初始化数据库脚本？

docker-compose.yml

database:
    image: microsoft/mssql-server-linux:2017-latest
    container_name: database
    ports:
      - 1433:1433
    volumes:
      - /var/opt/mssql
    environment:
      SA_PASSWORD: "P@55w0rd"
      ACCEPT_EULA: "Y"

模式.sql

CREATE TABLE Department
(
    Id INT PRIMARY KEY IDENTITY (1, 1),
    Name VARCHAR (50) NOT NULL
);

CREATE TABLE Student
(
    Id INT PRIMARY KEY IDENTITY (1, 1),
    Name VARCHAR (50) NOT NULL
);

CREATE TABLE Course 
(
    Id INT PRIMARY KEY IDENTITY (1, 1),
    Name VARCHAR (50) NOT NULL
);

INSERT INTO Student (Id, Name) VALUES(1, "John …