protected Result describeMbean(
      @Nonnull MBeanServerConnection mbeanServer, @Nonnull ObjectName objectName)
      throws IntrospectionException, ReflectionException, InstanceNotFoundException, IOException {
    MBeanInfo mbeanInfo = mbeanServer.getMBeanInfo(objectName);
    StringWriter sw = new StringWriter();
    PrintWriter out = new PrintWriter(sw);
    out.println("# MBEAN");
    out.println(objectName.toString());
    out.println();
    out.println("## OPERATIONS");
    List<MBeanOperationInfo> operations = Arrays.asList(mbeanInfo.getOperations());
    Collections.sort(
        operations,
        new Comparator<MBeanOperationInfo>() {
          @Override
          public int compare(MBeanOperationInfo o1, MBeanOperationInfo o2) {
            return o1.getName().compareTo(o1.getName());
          }
        });

    for (MBeanOperationInfo opInfo : operations) {
      out.print("* " + opInfo.getName() + "(");
      MBeanParameterInfo[] signature = opInfo.getSignature();
      for (int i = 0; i < signature.length; i++) {
        MBeanParameterInfo paramInfo = signature[i];
        out.print(paramInfo.getType() + " " + paramInfo.getName());
        if (i < signature.length - 1) {
          out.print(", ");
        }
      }

      out.print("):" + opInfo.getReturnType() /* + " - " + opInfo.getDescription() */);
      out.println();
    }
    out.println();
    out.println("## ATTRIBUTES");
    List<MBeanAttributeInfo> attributes = Arrays.asList(mbeanInfo.getAttributes());
    Collections.sort(
        attributes,
        new Comparator<MBeanAttributeInfo>() {
          @Override
          public int compare(MBeanAttributeInfo o1, MBeanAttributeInfo o2) {
            return o1.getName().compareTo(o2.getName());
          }
        });
    for (MBeanAttributeInfo attrInfo : attributes) {
      out.println(
          "* "
              + attrInfo.getName()
              + ": "
              + attrInfo.getType()
              + " - "
              + (attrInfo.isReadable() ? "r" : "")
              + (attrInfo.isWritable() ? "w" : "") /* + " - " +
                    attrInfo.getDescription() */);
    }

    String description = sw.getBuffer().toString();
    return new Result(objectName, description, description);
  }
示例#2
0
 /**
  * Description of the specified attribute name.
  *
  * @param attr - the attribute
  * @return String the description
  */
 protected String describeAttribute(MBeanAttributeInfo attr) {
   StringBuilder buf = new StringBuilder();
   buf.append("(");
   if (attr.isReadable()) {
     buf.append("r");
   }
   if (attr.isWritable()) {
     buf.append("w");
   }
   buf.append(") ").append(attr.getType()).append(" ").append(attr.getName());
   return buf.toString();
 }
  /**
   * @param mbeanServer
   * @param objectName
   * @param attributeName
   * @param attributeValue if <code>null</code>, this is a read access.
   * @return if this is a read access, the returned value (may be null); if it is a write access,
   *     return <code>void.class</code>.
   * @throws IOException
   * @throws JMException
   */
  public Result invokeAttribute(
      @Nonnull MBeanServerConnection mbeanServer,
      @Nonnull ObjectName objectName,
      @Nonnull String attributeName,
      @Nullable String attributeValue)
      throws IOException, JMException {
    MBeanInfo mbeanInfo = mbeanServer.getMBeanInfo(objectName);
    MBeanAttributeInfo attributeInfo = null;
    for (MBeanAttributeInfo mai : mbeanInfo.getAttributes()) {
      if (mai.getName().equals(attributeName)) {
        attributeInfo = mai;
        break;
      }
    }
    if (attributeInfo == null) {
      throw new IllegalArgumentException(
          "No attribute '"
              + attributeName
              + "' found on '"
              + objectName
              + "'. Existing attributes: "
              + Arrays.asList(mbeanInfo.getAttributes()));
    }

    String description;
    Object resultValue;

    if (attributeValue == null) {
      if (attributeInfo.isReadable()) {
        Object attribute = mbeanServer.getAttribute(objectName, attributeName);
        logger.info("get attribute value {}:{}:{}", objectName, attributeName, attribute);
        resultValue = attribute;
        description =
            "Get attribute value " + objectName + ":" + attributeName + ": " + resultValue;
      } else {
        throw new IllegalArgumentException(
            "Attribute '"
                + attributeName
                + "' is not readable on '"
                + objectName
                + "': "
                + attributeInfo);
      }
    } else {
      if (attributeInfo.isWritable()) {
        Object value = convertValue(attributeValue, attributeInfo.getType());
        mbeanServer.setAttribute(objectName, new Attribute(attributeName, value));
        logger.info("set attribute value {}:{}:{}", objectName, attributeName, value);

        description = "Set attribute value " + objectName + ":" + attributeName + ": " + value;
        resultValue = void.class;
      } else {
        throw new IllegalArgumentException(
            "Attribute '"
                + attributeName
                + "' is not writable on '"
                + objectName
                + "': "
                + attributeInfo);
      }
    }

    return new Result(objectName, resultValue, description);
  }