Java GetPropertyAction类代码示例

import com.sun.jmx.mbeanserver.GetPropertyAction; //导入依赖的package包/类
private void checkMLetMethods(ObjectName name, String operation)
throws InstanceNotFoundException {
    // Check if security manager installed
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        return;
    }
    // Check for addURL and getMBeansFromURL methods
    if (!operation.equals("addURL") &&
            !operation.equals("getMBeansFromURL")) {
        return;
    }
    // Check if MBean is instance of MLet
    if (!getMBeanServer().isInstanceOf(name,
            "javax.management.loading.MLet")) {
        return;
    }
    // Throw security exception
    if (operation.equals("addURL")) { // addURL
        throw new SecurityException("Access denied! MLet method addURL " +
                "cannot be invoked unless a security manager is installed.");
    } else { // getMBeansFromURL
        // Whether or not calling getMBeansFromURL is allowed is controlled
        // by the value of the "jmx.remote.x.mlet.allow.getMBeansFromURL"
        // system property. If the value of this property is true, calling
        // the MLet's getMBeansFromURL method is allowed. The default value
        // for this property is false.
        final String propName = "jmx.remote.x.mlet.allow.getMBeansFromURL";
        GetPropertyAction propAction = new GetPropertyAction(propName);
        String propValue = AccessController.doPrivileged(propAction);
        boolean allowGetMBeansFromURL = "true".equalsIgnoreCase(propValue);
        if (!allowGetMBeansFromURL) {
            throw new SecurityException("Access denied! MLet method " +
                    "getMBeansFromURL cannot be invoked unless a " +
                    "security manager is installed or the system property " +
                    "-Djmx.remote.x.mlet.allow.getMBeansFromURL=true " +
                    "is specified.");
        }
    }
}
 

import com.sun.jmx.mbeanserver.GetPropertyAction; //导入依赖的package包/类
/**
 * Creates an empty <tt>TabularDataSupport</tt> instance whose open-type is <var>tabularType</var>,
 * and whose underlying <tt>HashMap</tt> has the specified initial capacity and load factor.
 *
 * @param  tabularType               the <i>tabular type</i> describing this <tt>TabularData</tt> instance;
 *                           cannot be null.
 *
 * @param  initialCapacity   the initial capacity of the HashMap.
 *
 * @param  loadFactor        the load factor of the HashMap
 *
 * @throws IllegalArgumentException  if the initial capacity is less than zero,
 *                                   or the load factor is nonpositive,
 *                                   or the tabular type is null.
 */
public TabularDataSupport(TabularType tabularType, int initialCapacity, float loadFactor) {

    // Check tabularType is not null
    //
    if (tabularType == null) {
        throw new IllegalArgumentException("Argument tabularType cannot be null.");
    }

    // Initialize this.tabularType (and indexNamesArray for convenience)
    //
    this.tabularType = tabularType;
    List<String> tmpNames = tabularType.getIndexNames();
    this.indexNamesArray = tmpNames.toArray(new String[tmpNames.size()]);

    // Since LinkedHashMap was introduced in SE 1.4, it's conceivable even
    // if very unlikely that we might be the server of a 1.3 client.  In
    // that case you'll need to set this property.  See CR 6334663.
    String useHashMapProp = AccessController.doPrivileged(
            new GetPropertyAction("jmx.tabular.data.hash.map"));
    boolean useHashMap = "true".equalsIgnoreCase(useHashMapProp);

    // Construct the empty contents HashMap
    //
    this.dataMap = useHashMap ?
        new HashMap<Object,CompositeData>(initialCapacity, loadFactor) :
        new LinkedHashMap<Object, CompositeData>(initialCapacity, loadFactor);
}
 

import com.sun.jmx.mbeanserver.GetPropertyAction; //导入依赖的package包/类
private void checkClassNameOverride() throws SecurityException {
    if (this.getClass().getClassLoader() == null)
        return;  // We trust bootstrap classes.
    if (overridesGetClassName(this.getClass())) {
        final GetPropertyAction getExtendOpenTypes =
            new GetPropertyAction("jmx.extend.open.types");
        if (AccessController.doPrivileged(getExtendOpenTypes) == null) {
            throw new SecurityException("Cannot override getClassName() " +
                    "unless -Djmx.extend.open.types");
        }
    }
}
 

import com.sun.jmx.mbeanserver.GetPropertyAction; //导入依赖的package包/类
/**
 * Creates an empty {@code TabularDataSupport} instance whose open-type is <var>tabularType</var>,
 * and whose underlying {@code HashMap} has the specified initial capacity and load factor.
 *
 * @param  tabularType               the <i>tabular type</i> describing this {@code TabularData} instance;
 *                           cannot be null.
 *
 * @param  initialCapacity   the initial capacity of the HashMap.
 *
 * @param  loadFactor        the load factor of the HashMap
 *
 * @throws IllegalArgumentException  if the initial capacity is less than zero,
 *                                   or the load factor is nonpositive,
 *                                   or the tabular type is null.
 */
public TabularDataSupport(TabularType tabularType, int initialCapacity, float loadFactor) {

    // Check tabularType is not null
    //
    if (tabularType == null) {
        throw new IllegalArgumentException("Argument tabularType cannot be null.");
    }

    // Initialize this.tabularType (and indexNamesArray for convenience)
    //
    this.tabularType = tabularType;
    List<String> tmpNames = tabularType.getIndexNames();
    this.indexNamesArray = tmpNames.toArray(new String[tmpNames.size()]);

    // Since LinkedHashMap was introduced in SE 1.4, it's conceivable even
    // if very unlikely that we might be the server of a 1.3 client.  In
    // that case you'll need to set this property.  See CR 6334663.
    String useHashMapProp = AccessController.doPrivileged(
            new GetPropertyAction("jmx.tabular.data.hash.map"));
    boolean useHashMap = "true".equalsIgnoreCase(useHashMapProp);

    // Construct the empty contents HashMap
    //
    this.dataMap = useHashMap ?
        new HashMap<Object,CompositeData>(initialCapacity, loadFactor) :
        new LinkedHashMap<Object, CompositeData>(initialCapacity, loadFactor);
}