RequiredModelMBean.java 文件源码

/**
 * Returns the values of several attributes in the ModelMBean.
 * Executes a getAttribute for each attribute name in the
 * attrNames array passed in.
 *
 * @param attrNames A String array of names of the attributes
 * to be retrieved.
 *
 * @return The array of the retrieved attributes.
 *
 * @exception RuntimeOperationsException Wraps an
 * {@link IllegalArgumentException}: The object name in parameter is
 * null or attributes in parameter is null.
 *
 * @see #setAttributes(javax.management.AttributeList)
 */
public AttributeList getAttributes(String[] attrNames)      {
    if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
        MODELMBEAN_LOGGER.log(Level.TRACE,
                RequiredModelMBean.class.getName(), "Entry");
    }

    if (attrNames == null)
        throw new RuntimeOperationsException(new
            IllegalArgumentException("attributeNames must not be null"),
            "Exception occurred trying to get attributes of a "+
            "RequiredModelMBean");

    AttributeList responseList = new AttributeList();
    for (int i = 0; i < attrNames.length; i++) {
        try {
            responseList.add(new Attribute(attrNames[i],
                                 getAttribute(attrNames[i])));
        } catch (Exception e) {
            // eat exceptions because interface doesn't have an
            // exception on it
            if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
                MODELMBEAN_LOGGER.log(Level.TRACE,
                        "Failed to get \"" + attrNames[i] + "\": ", e);
            }
        }
    }

    if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
        MODELMBEAN_LOGGER.log(Level.TRACE, "Exit");
    }

    return responseList;
}