Question

在我的 Mule 项目中，我有一个包含我的http地址的属性文件 server.address = http://localhost:8080/test/ 然后在我的流程中我将它引用为${server.address}，但我如何在java组件类中引用该属性？

例如：

  public String address = ${server.address}

Answer 1

您可以将java类中的属性设置为Spring属性。对于单个对象，将在启动流时设置该属性。

<flow name="propertyprojectFlow1" doc:name="propertyprojectFlow1">
    <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8581" path="echoServer" doc:name="HTTP"/>
    <component  doc:name="Java">
        <singleton-object class="MyClass">
            <property key="server" value="${server.address}"/>
        </singleton-object>
    </component>
</flow>

该类需要为该属性设置一个setter。

import org.apache.log4j.Logger;
import org.mule.api.MuleEventContext;
import org.mule.api.lifecycle.Callable;


public class MyClass implements Callable {
    private static Logger logger = Logger.getLogger(MyClass.class);
    private String server;

    public MyClass() {
    }

    @Override
    public Object onCall(MuleEventContext eventContext) throws Exception {
        logger.info("Server is " + server);
        return null;
    }

    public void setServer(String server) {
        logger.info("Setting server to " + server);
        this.server = server;
    }

}

Answer 2

属性文件中的属性名称：

your.property.name.in.properties.file=testing

Java组件：

import org.mule.api.MuleEventContext;
import org.mule.api.lifecycle.Callable;
import org.springframework.beans.factory.annotation.Value;

public class PropertyTest implements Callable {

    @Value("${your.property.name.in.properties.file}")
    private String yourPropertyNameInPropertiesFile;

    @Override
    public Object onCall(MuleEventContext eventContext) throws Exception {

        System.out.println("yourPropertyNameInPropertiesFile"+yourPropertyNameInPropertiesFile);

        // TODO Auto-generated method stub
        return null;
    }
}

Answer 3

您可以加载该属性或任何其他属性，加载属性文件。（虽然它可能会产生一些性能问题，但每次执行流时都会加载属性文件）。

public Properties loadProperties(String name) {
    if(properties == null){
        return loadProperties(name, Thread.currentThread().getContextClassLoader());
    } else {
        return properties;
    }
}

然后：

Properties props = loadProperties("application.properties");
String url = props.getProperty("server.address");

对@Matt回复进行一些更改

    import org.apache.log4j.Logger;
    import org.mule.api.MuleEventContext;
    import org.mule.api.lifecycle.Callable;   

    public class MyClass implements Callable {
       private static Logger logger = Logger.getLogger(MyClass.class);
       private String server;
       private Properties properties;

       public MyClass() {  }

       @Override
       public Object onCall(MuleEventContext eventContext) throws Exception {
           properties = loadProperties("application.properties");
           server = properties.getProperty("server.address");
           logger.info("Server is " + server);
           return null;
       }

       public Properties loadProperties(String name) {
            if(properties == null){
                return loadProperties(name, Thread.currentThread().getContextClassLoader());
            } else {
               return properties;
            }
        }
   }

java组件中的Mule属性

3 个答案: