Question

我正在编写我的第一个Mulesoft连接器。我正在尝试实现@ConnectionManagementStrategy。我引用了：

我正在尝试实现与自定义Web服务的连接。对于我的客户端，我需要指定用户名，密码和端点。如果我对端点进行硬编码，我能够使连接正常工作。但是，我们可能会将此连接器重新用于其他服务，并且我希望能够配置端点。根据文档，devkit会自动调用/创建类实例。我希望能够基于@Connector中的可配置属性将构造函数传递给构造函数，或者将其他参数传递给@Connect方法。

我没有在文档中找到如何自定义这些方法。

我的@Connector：

    @Connector(name="testContactConnector", friendlyName = "Test Contact Connector")
public class Contact {

    @Configurable
    @Default("https://my.cool.service")
    public String webServiceEndpoint;

    @ConnectionStrategy
    private Connection connection;

    public void setConnection(Connection connection) {
        this.connection = connection;
    }

    public Connection getConnection() {
        return this.connection;
    }

    @Processor
    public String getSessionID() throws Exception {
        return this.connection.connectionID();
    }

}

我的@ConnectionManagementStrategy：

@ConnectionManagement(friendlyName = "Contact Service Connection")
public class Connection {

    private String serviceEndpoint, username, password, sessionID;
    private Service service;

    public Connection() {
    }

    @Connect
    @TestConnectivity
    public void connect(@ConnectionKey String username, @Password String password)
        throws ConnectionException {
        this.username = username;
        this.password = password;

        try {
            this.service = Service.Logon(this.username, this.password, this.serviceEndpoint);
            this.sessionID = this.service.getSession();
        } catch (Exception error) {
            throw new ConnectionException(ConnectionExceptionCode.INCORRECT_CREDENTIALS, null, error.getMessage(), error);
        }
    }

    @Disconnect
    public void disconnect() {
        if(this.service != null) {
            try {
                this.service.killSession();
            } catch (Exception error) {
                error.printStackTrace();
            }
            finally {
                this.service = null;
            }
        }
    }

    @ValidateConnection
    public boolean isConnected() {
        try {
            return (this.service != null && this.service.getSession() != null);
        } catch (Exception error) {
            error.printStackTrace();
            return false;
        }
    }

    @ConnectionIdentifier
    public String connectionID() {
        try {
            return this.service.getSession();
        } catch (Exception error) {
            error.printStackTrace();
            return null;
        }
    }

}

修改脂肪在示例代码中找到了一个字符

我根据答案中提供的文件提出的解决方案

在@ConnectionManagement类中，我添加了以下属性：

@Configurable
@Default("https://your.web.service")
public String webServiceEndpoint;

在@Connect方法中，我引用了该属性：

@Connect
@TestConnectivity
public void connect(@ConnectionKey String username, @Password String password) throws ConnectionException {
  this.username = username;
  this.password = password;
  try {
        this.service = Service.Logon(this.username, this.password, this.webServiceEndpoint);
        this.sessionID = this.service.getSessionID();
    } catch (Exception error) {
        throw new ConnectionException(ConnectionExceptionCode.INCORRECT_CREDENTIALS, null, error.getMessage(), error);
    }
}

在我的配置文件中，我有以下设置值：

<myconnector:config name="config" webServiceEndpoint="http://my.custom.service" username="foo" password="foo"/>

Answer 1

Here您可以找到一个简单的示例，了解如何实现连接管理。此外，本文档提供了有关如何从头到尾构建连接器的简单分步指南。 HTH。

Answer 2

您可以拥有多个@ConnectionKey元素，名称可以是任何名称。

这是完全有效的：

// This defines the 'delegate'.
public interface IA {
    int f(int a);
}

public class MyClass {
    // f1 and f2 have the same signature as 'IA.f'.
    private int f1(int a) {
        return a + 1;
    }

    private int f2(int a) {
        return 2 * a;
    }

    // These wrappers are one way to return a 'delegate'.
    // Each wrapper creates one instance of an anonymous class.
    // Notice that we did not have to declare MyClass as implementing IA,
    // and that we can wrap different methods of MyClass into 'IA's.
    // Contrast this with 'MyClass implements IA', which would require
    // a method 'f' in 'MyClass', and would not provide a way to
    // delegate to different methods of 'MyClass'.
    public IA wrapF1() {
        return (new IA(){
            public int f(int a) {
                return f1(a);
            }
        });
    }

    public IA wrapF2() {
        return (new IA(){
            public int f(int a) {
                return f2(a);
            }
        });
    }

    // returns a 'delegate', either to 'f1' or 'f2'.
    public IA callMe(boolean useF2) {
        if (!useF2)
            return wrapF1();
        else
            return wrapF2();
    }

}

您也可以使用@Configurable元素，因为它们将在调用@Connect之前初始化。

具有附加参数的Mulesoft ConnectionManagementStrategy类

2 个答案: