AbstractCommandsController.java 文件源码

/**
 * Gets the MemberMXBean from the JVM Platform MBeanServer for the specified member, identified by
 * name or ID in the GemFire cluster.
 * 
 * @param memberNameId a String indicating the name or ID of the GemFire member.
 * @return a proxy to the GemFire member's MemberMXBean.
 * @throws IllegalStateException if no MemberMXBean could be found for GemFire member with ID or
 *         name.
 * @throws RuntimeException wrapping the MalformedObjectNameException if the ObjectName pattern is
 *         malformed.
 * @see #getMBeanServer()
 * @see #isMemberMXBeanFound(java.util.Collection)
 * @see javax.management.ObjectName
 * @see javax.management.QueryExp
 * @see javax.management.MBeanServer#queryNames(javax.management.ObjectName,
 *      javax.management.QueryExp)
 * @see javax.management.JMX#newMXBeanProxy(javax.management.MBeanServerConnection,
 *      javax.management.ObjectName, Class)
 * @see org.apache.geode.management.MemberMXBean
 */
protected MemberMXBean getMemberMXBean(final String memberNameId) {
  try {
    final MBeanServer connection = getMBeanServer();

    final String objectNamePattern =
        ManagementConstants.OBJECTNAME__PREFIX.concat("type=Member,*");

    // NOTE throws a MalformedObjectNameException, but this should not happen since we constructed
    // the ObjectName above
    final ObjectName objectName = ObjectName.getInstance(objectNamePattern);

    final QueryExp query = Query.or(Query.eq(Query.attr("Name"), Query.value(memberNameId)),
        Query.eq(Query.attr("Id"), Query.value(memberNameId)));

    final Set<ObjectName> objectNames = connection.queryNames(objectName, query);

    assertState(isMemberMXBeanFound(objectNames),
        "No MemberMXBean with ObjectName (%1$s) based on Query (%2$s) was found in the Platform MBeanServer for member (%3$s)!",
        objectName, query, memberNameId);

    return JMX.newMXBeanProxy(connection, objectNames.iterator().next(), MemberMXBean.class);
  } catch (MalformedObjectNameException e) {
    throw new RuntimeException(e);
  }
}