Java实现AttributeListAPI

AttributeList API 是 JMX API 的一部分，用于管理 MBean 的属性列表。下面是 Java 实现 AttributeList API 的示例代码。

首先，我们需要创建一个 MBean 实例，并为其设置一些属性。

public class MyMBean implements DynamicMBean {
    private Map<String, Object> attributes = new HashMap<>();
    
    public MyMBean() {
        attributes.put("Name", "John");
        attributes.put("Age", 30);
    }
    
    @Override
    public Object getAttribute(String attribute) throws AttributeNotFoundException, MBeanException, ReflectionException {
        if (attributes.containsKey(attribute)) {
            return attributes.get(attribute);
        }
        throw new AttributeNotFoundException(attribute);
    }
    
    @Override
    public AttributeList getAttributes(String[] attributes) {
        AttributeList result = new AttributeList();
        for (String attribute : attributes) {
            try {
                Object value = getAttribute(attribute);
                result.add(new Attribute(attribute, value));
            } catch (Exception e) {
                // Ignore
            }
        }
        return result;
    }
    
    @Override
    public void setAttribute(Attribute attribute) throws AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {
        String name = attribute.getName();
        Object value = attribute.getValue();
        if (attributes.containsKey(name)) {
            attributes.put(name, value);
        } else {
            throw new AttributeNotFoundException(name);
        }
    }
    
    @Override
    public AttributeList setAttributes(AttributeList attributes) {
        AttributeList result = new AttributeList();
        for (Attribute attribute : attributes.asList()) {
            try {
                setAttribute(attribute);
                result.add(attribute);
            } catch (Exception e) {
                // Ignore
            }
        }
        return result;
    }
    
    // other methods omitted for brevity
}

接下来，我们可以使用 AttributeList API 获取和设置 MBean 的属性列表。

MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName = new ObjectName("com.example:type=MyMBean");
MyMBean mbean = new MyMBean();

mbs.registerMBean(mbean, objectName);

// Get a list of all attributes
AttributeList attributes = mbs.getAttributes(objectName, new String[]{"*"});
for (Attribute attribute : attributes.asList()) {
    System.out.println(attribute.getName() + ": " + attribute.getValue());
}

// Get a specific attribute
Attribute attribute = mbs.getAttribute(objectName, "Name");
System.out.println(attribute.getName() + ": " + attribute.getValue());

// Set an attribute
mbs.setAttribute(objectName, new Attribute("Name", "Bob"));

// Set multiple attributes
AttributeList attributesToSet = new AttributeList();
attributesToSet.add(new Attribute("Name", "Bob"));
attributesToSet.add(new Attribute("Age", 35));
AttributeList newAttributes = mbs.setAttributes(objectName, attributesToSet);

for (Attribute attribute : newAttributes.asList()) {
    System.out.println(attribute.getName() + ": " + attribute.getValue());
}

mbs.unregisterMBean(objectName);

免责声明：本文内容通过AI工具匹配关键字智能整合而成，仅供参考，火山引擎不对内容的真实、准确或完整作任何形式的承诺。如有任何问题或意见，您可以通过联系service@volcengine.com进行反馈，火山引擎收到您的反馈后将及时答复和处理。