MonitoredAttribute.java revision 672:2bb058ce572e
1/* 2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25package com.sun.corba.se.spi.monitoring; 26 27import com.sun.corba.se.spi.monitoring.MonitoredAttributeInfo; 28import java.util.*; 29 30/** 31 * @author Hemanth Puttaswamy 32 * 33 * Monitored Attribute is the interface to represent a Monitorable 34 * Attribute. Using this interface, one can get the value of the attribute 35 * and set the value if it is a writeable attribute. 36 */ 37public interface MonitoredAttribute { 38 39 /////////////////////////////////////// 40 // operations 41 42/** 43 * Gets the Monitored Attribute Info for the attribute. 44 * 45 * @param monitoredAttributeInfo for this Monitored Attribute. 46 */ 47 public MonitoredAttributeInfo getAttributeInfo(); 48/** 49 * Sets the value for the Monitored Attribute if isWritable() is false, the 50 * method will throw ILLEGAL Operation exception. 51 * 52 * Also, the type of 'value' should be same as specified in the 53 * MonitoredAttributeInfo for a particular instance. 54 * 55 * @param value should be any one of the Basic Java Type Objects which are 56 * Long, Double, Float, String, Integer, Short, Character, Byte. 57 */ 58 public void setValue(Object value); 59 60 61/** 62 * Gets the value of the Monitored Attribute. The value can be obtained 63 * from different parts of the module. User may choose to delegate the call 64 * to getValue() to other variables. 65 * 66 * NOTE: It is important to make sure that the type of Object returned in 67 * getvalue is same as the one specified in MonitoredAttributeInfo for this 68 * attribute. 69 * 70 * @param value is the current value for this MonitoredAttribute 71 */ 72 public Object getValue(); 73/** 74 * Gets the name of the Monitored Attribute. 75 * 76 * @return name of this Attribute 77 */ 78 public String getName(); 79/** 80 * If this attribute needs to be cleared, the user needs to implement this 81 * method to reset the state to initial state. If the Monitored Attribute 82 * doesn't change like for example (ConnectionManager High Water Mark), 83 * then clearState() is a No Op. 84 */ 85 public void clearState(); 86 87} // end MonitoredAttribute 88