Java Util类代码示例

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
/**
 * Update cahed datas.
 * Obtains a {@link List} of raw datas by calling
 * {@link #getRawDatas(Map,String) getRawDatas((Map)context,getRawDatasKey())}.<br>
 * Then allocate a new {@link TreeMap} to serve as temporary map between
 * names and indexes, and call {@link #updateCachedDatas(Object,List)}
 * with that temporary map as context.<br>
 * Finally replaces the {@link #names} TreeMap by the temporary
 * TreeMap.
 * @param context The request contextual cache allocated by the
 *        {@link JvmContextFactory}.
 **/
protected SnmpCachedData updateCachedDatas(Object context) {

    final Map<Object, Object> userData =
        (context instanceof Map)?Util.<Map<Object, Object>>cast(context):null;

    // Look for memory manager list in request contextual cache.
    final List<?> rawDatas = getRawDatas(userData,getRawDatasKey());

    log.debug("updateCachedDatas","rawDatas.size()=" +
          ((rawDatas==null)?"<no data>":""+rawDatas.size()));

    TreeMap<String,SnmpOid> ctxt = new TreeMap<>();
    final SnmpCachedData result =
        super.updateCachedDatas(ctxt,rawDatas);
    names = ctxt;
    return result;
}
 

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
/**
 * Get the list of memory pool associated with the
 * given MemoryManagerMXBean.
 **/
protected String[] getMemoryPools(Object userData,
                              MemoryManagerMXBean mmm, long mmarc) {
    final String listTag =
        "JvmMemManager." + mmarc + ".getMemoryPools";

    String[] result=null;
    if (userData instanceof Map) {
        result = (String[])((Map)userData).get(listTag);
        if (result != null) return result;
    }

    if (mmm!=null) {
        result = mmm.getMemoryPoolNames();
    }
    if ((result!=null)&&(userData instanceof Map)) {
        Map<Object, Object> map = Util.cast(userData);
        map.put(listTag,result);
    }

    return result;
}
 

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
static String[] getClassPath(Object userData) {
    final Map<Object, Object> m =
            Util.cast((userData instanceof Map)?userData:null);
    final String tag = "JvmRuntime.getClassPath";

    // If the list is in the cache, simply return it.
    //
    if (m != null) {
        final String[] cached = (String[])m.get(tag);
        if (cached != null) return cached;
    }

    final String[] args = splitPath(getRuntimeMXBean().getClassPath());

    if (m != null) m.put(tag,args);
    return args;
}
 

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
static String[] getBootClassPath(Object userData) {
    if (!getRuntimeMXBean().isBootClassPathSupported())
    return new String[0];

    final Map<Object, Object> m =
            Util.cast((userData instanceof Map)?userData:null);
    final String tag = "JvmRuntime.getBootClassPath";

    // If the list is in the cache, simply return it.
    //
    if (m != null) {
        final String[] cached = (String[])m.get(tag);
        if (cached != null) return cached;
    }

    final String[] args = splitPath(getRuntimeMXBean().getBootClassPath());

    if (m != null) m.put(tag,args);
    return args;
}
 

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
static String[] getLibraryPath(Object userData) {
    final Map<Object, Object> m =
            Util.cast((userData instanceof Map)?userData:null);
    final String tag = "JvmRuntime.getLibraryPath";

    // If the list is in the cache, simply return it.
    //
    if (m != null) {
        final String[] cached = (String[])m.get(tag);
        if (cached != null) return cached;
    }

    final String[] args = splitPath(getRuntimeMXBean().getLibraryPath());

    if (m != null) m.put(tag,args);
    return args;
}
 

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
static String[] getInputArguments(Object userData) {
    final Map<Object, Object> m =
            Util.cast((userData instanceof Map)?userData:null);
    final String tag = "JvmRuntime.getInputArguments";

    // If the list is in the cache, simply return it.
    //
    if (m != null) {
        final String[] cached = (String[])m.get(tag);
        if (cached != null) return cached;
    }

    final List<String> l = getRuntimeMXBean().getInputArguments();
    final String[] args = l.toArray(new String[0]);

    if (m != null) m.put(tag,args);
    return args;
}
 

import com.sun.jmx.mbeanserver.Util; //导入依赖的package包/类
private Integer addListenerWithSubject(ObjectName name,
                                       MarshalledObject<NotificationFilter> filter,
                                       Subject delegationSubject,
                                       boolean reconnect)
    throws InstanceNotFoundException, IOException {

    final boolean debug = logger.debugOn();
    if (debug)
        logger.debug("addListenerWithSubject",
                "(ObjectName,MarshalledObject,Subject)");

    final ObjectName[] names = new ObjectName[] {name};
    final MarshalledObject<NotificationFilter>[] filters =
            Util.cast(new MarshalledObject<?>[] {filter});
    final Subject[] delegationSubjects = new Subject[] {
        delegationSubject
    };

    final Integer[] listenerIDs =
            addListenersWithSubjects(names,filters,delegationSubjects,
            reconnect);

    if (debug) logger.debug("addListenerWithSubject","listenerID="
            + listenerIDs[0]);
    return listenerIDs[0];
}