如何在骡子连接器中添加下拉列表项？ [英] how do i add a drop down list item in a mule connector?

问题描述

我做了一个骡子连接器，一切都很好。我有一个HTTP出站连接的4个主要属性：url，port，path和method。

我希望该方法是一个下拉列表，其值为GET， POST。

你们知道怎么做吗？需要使用什么注释才能解决问题？或者是在添加地图或枚举属性时被Mule认可？

这是我目前的简单代码

  / ** 
 *此文件由Mule Development Kit自动生成
 * / 
 package com.web.testcomponent; 
 
 import java.io.BufferedReader; 
 import java.io.IOException; 
 import java.io.InputStreamReader; 
 import java.net.HttpURLConnection; 
 import java.net.MalformedURLException; 
 import java.net.URL; 
 
 import org.mule.api.MuleEventContext; 
 import org.mule.api.annotations.Configurable; 
 import org.mule.api.annotations.Module; 
 import org.mule.api.annotations.Processor; 
 import org.mule.api.annotations.display.Placement; 
 import org.mule.api.annotations.expressions.Lookup; 
 import org.mule.api.annotations.param.Default; 
 import org.mule.api.annotations.param.Optional; 
 import org.mule.api.annotations.param.Payload; 
 
 / ** 
 *通用模块
 * 
 * @author MuleSoft，Inc. 
 * / 
 @Module（name = testcomponent，schemaVersion =1.0-SNAPSHOT，friendlyName =HTTP / S Component，description =这是自定义HTTP / S组件）
 public class TestComponentModule 
 {
 
 @Lookup（myMuleContext）
 private MuleEventContext context; 
 
 / ** 
 *连接URL 
 * / 
 @Configurable 
 @Placement（order = 1，group =Connection，tab =一般）
 private String url; 
 
 / ** 
 *连接端口
 * / 
 @Configurable 
 @Placement（order = 2，group =Connection，tab =一般）
 private String port; 
 
 / ** 
 *连接路径
 * / 
 @Configurable 
 @Placement（order = 3，group =Connection，tab =一般）
 private String path; 
 
 / ** 
 *连接方法（GET或POST）
 * / 
 @Configurable 
 @Default（value =GET）
 @Optional 
 @Placement（order = 4，group =Connection，tab =General）
 private String method; 
 
 public String getUrl（）{
 return url; 
} 
 
 public void setUrl（String url）{
 this.url = url; 
} 
 
 public String getPort（）{
 return port; 
} 
 
 public void setPort（String port）{
 this.port = port; 
} 
 
 public String getPath（）{
 return path; 
} 
 
 public void setPath（String path）{
 this.path = path; 
} 
 
 public String getMethod（）{
 return method; 
} 
 
 public void setMethod（String method）{
 this.method = method; 
} 
 
 public MuleEventContext getContext（）{
 return context; 
} 
 
 public void setContext（MuleEventContext context）{
 this.context = context; 
} 
 
 / ** 
 *自定义处理器
 * 
 * {@sample.xml ../../../doc/TestComponent -connector.xml.sample testcomponent：test-processor} 
 * 
 * @param内容要处理的随机内容
 * @param有效负载字符串有效负载本身
 * @return一些string 
 * / 
 @Processor 
 public String testProcessor（@Payload String payload）
 {
 HttpURLConnection conn = null; 
 
 try {
 URL url = new URL（getUrl（）+/+ getPath（））; 
 conn =（HttpURLConnection）url.openConnection（）; 
 conn.setRequestMethod（getMethod（））; 
 conn.setRequestProperty（Accept，application / json）; 
 
 if（conn.getResponseCode（）！= HttpURLConnection.HTTP_OK）{
 throw new RuntimeException（Failed  - > HTTP错误代码：+ conn.getResponseCode（））; 
} 
 
 BufferedReader br = new BufferedReader（new InputStreamReader（conn.getInputStream（）））; 
字符串输出，缓冲区; 
 output =; 
 while（（buffer = br.readLine（））！= null）{
 output + = buffer; 
} 
 
 payload = output; 
 conn.disconnect（）; 
} catch（MalformedURLException e）{
 e.printStackTrace（）; 
} catch（IOException e）{
 e.printStackTrace（）; 
} 
 
返回有效负载; 
} 
} 
  

解决方案

使用枚举时没有问题：

  public enum HttpMethod 
 {
 GET，POST 
 }; 
 
 @Configurable 
 @Default（value =GET）
 @Optional 
 @Placement（order = 4，group =Connection，tab =General ）
 private HttpMethod方法; 
  

这是不是也适合你？

作为一个附注，看看你的 @Processor 方法是什么，我想知道你是否不重新发明 @RestCall 处理器。还有为什么使用 HttpURLConnection 可以使用 MuleClient 执行HTTP调用？

I've made a mule connector, everything works great. I got 4 main properties for an HTTP outbound connection: url, port, path and method.

I would like the method to be a drop down list with values: GET, POST.

Do you guys know how to do it? what annotation needs to be used in case that's the way to solve it? Or is it recognized by Mule when adding a Map or Enum property?

This is my current simple code

/**
 * This file was automatically generated by the Mule Development Kit
 */
package com.web.testcomponent;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.mule.api.MuleEventContext;
import org.mule.api.annotations.Configurable;
import org.mule.api.annotations.Module;
import org.mule.api.annotations.Processor;
import org.mule.api.annotations.display.Placement;
import org.mule.api.annotations.expressions.Lookup;
import org.mule.api.annotations.param.Default;
import org.mule.api.annotations.param.Optional;
import org.mule.api.annotations.param.Payload;

/**
 * Generic module
 *
 * @author MuleSoft, Inc.
 */
@Module(name="testcomponent", schemaVersion="1.0-SNAPSHOT", friendlyName="HTTP/S Component", description="This is custom HTTP/S Component")
public class TestComponentModule
{

    @Lookup("myMuleContext")
    private MuleEventContext context;

    /**
     * Connection URL
     */
    @Configurable
    @Placement(order=1,group="Connection",tab="General")
    private String url;

    /**
     * Connection Port
     */
    @Configurable
    @Placement(order=2,group="Connection",tab="General")
    private String port;

    /**
     * Connection Path
     */
    @Configurable
    @Placement(order=3,group="Connection",tab="General")
    private String path;    

    /**
     * Connection Method (GET or POST)
     */
    @Configurable
    @Default(value="GET")
    @Optional
    @Placement(order=4,group="Connection",tab="General")
    private String method;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getPort() {
        return port;
    }

    public void setPort(String port) {
        this.port = port;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    public String getMethod() {
        return method;
    }

    public void setMethod(String method) {
        this.method = method;
    }

    public MuleEventContext getContext() {
        return context;
    }

    public void setContext(MuleEventContext context) {
        this.context = context;
    }

    /**
     * Custom processor
     *
     * {@sample.xml ../../../doc/TestComponent-connector.xml.sample testcomponent:test-processor}
     *
     * @param content Random content to be processed
     * @param payload The String payload itself
     * @return Some string
     */
    @Processor
    public String testProcessor(@Payload String payload)
    {       
        HttpURLConnection conn = null;

        try {
            URL url = new URL(getUrl() + "/" + getPath());
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod(getMethod());
            conn.setRequestProperty("Accept", "application/json");

            if(conn.getResponseCode() != HttpURLConnection.HTTP_OK) {
                throw new RuntimeException("Failed -> HTTP error code : " + conn.getResponseCode());
            }

            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String output, buffer;
            output = "";
            while((buffer = br.readLine()) != null) {
                output += buffer;
            }

            payload = output;
            conn.disconnect();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return payload;
    }
}

解决方案

I have no problem using an enum:

public enum HttpMethod
{
    GET, POST
};

@Configurable
@Default(value = "GET")
@Optional
@Placement(order = 4, group = "Connection", tab = "General")
private HttpMethod method;

Doesn't this work for you too?

As a side note, looking at what your @Processor method does, I'm wondering if you're not re-inventing @RestCall processors. Also why using a raw HttpURLConnection when you can perform HTTP calls with the MuleClient?

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