Java QueryEval.getMBeanServer方法代码示例

import javax.management.QueryEval; //导入方法依赖的package包/类
public Set<ObjectInstance> queryMBeans(ObjectName name, QueryExp query) {
    Set<ObjectInstance> instances = newSet();
    if (name == null)
        name = ObjectName.WILDCARD;
    if (query == null)
        query = trueQuery;
    MBeanServer oldMBS = QueryEval.getMBeanServer();
    try {
        query.setMBeanServer(this);
        for (ObjectName n : mbeans.keySet()) {
            if (name.apply(n)) {
                try {
                    if (query.apply(n))
                        instances.add(getObjectInstance(n));
                } catch (Exception e) {
                    // OK: Ignore this MBean in the result
                }
            }
        }
    } finally {
        query.setMBeanServer(oldMBS);
    }
    return instances;
}
 

import javax.management.QueryEval; //导入方法依赖的package包/类
/**
 * Applies the specified queries to the set of ObjectInstances.
 */
private Set<ObjectInstance>
        filterListOfObjectInstances(Set<ObjectInstance> list,
                                    QueryExp query) {
    // Null query.
    //
    if (query == null) {
        return list;
    } else {
        Set<ObjectInstance> result = new HashSet<ObjectInstance>();
        // Access the filter.
        //
        for (ObjectInstance oi : list) {
            boolean res = false;
            MBeanServer oldServer = QueryEval.getMBeanServer();
            query.setMBeanServer(server);
            try {
                res = query.apply(oi.getObjectName());
            } catch (Exception e) {
                res = false;
            } finally {
                /*
                 * query.setMBeanServer is probably
                 * QueryEval.setMBeanServer so put back the old
                 * value.  Since that method uses a ThreadLocal
                 * variable, this code is only needed for the
                 * unusual case where the user creates a custom
                 * QueryExp that calls a nested query on another
                 * MBeanServer.
                 */
                query.setMBeanServer(oldServer);
            }
            if (res) {
                result.add(oi);
            }
        }
        return result;
    }
}
 

import javax.management.QueryEval; //导入方法依赖的package包/类
/**  Set the mbean server on the QueryExp and try and pass back any previously set one */
private static MBeanServer setQueryExpServer(QueryExp query, MBeanServer toSet) {
    // We assume the QueryExp is a QueryEval subclass or uses the QueryEval thread local
    // mechanism to store any existing MBeanServer. If that's not the case we have no
    // way to access the old mbeanserver to let us restore it
    MBeanServer result = QueryEval.getMBeanServer();
    query.setMBeanServer(toSet);
    return result;
}
 

import javax.management.QueryEval; //导入方法依赖的package包/类
public boolean apply(final ObjectName name) {
    final MBeanServer mbs = QueryEval.getMBeanServer();
    return isInstanceOf(mbs, name, broadcasterClass);
}