| /* MemoryPoolMXBeanImpl.java - Implementation of a memory pool bean |
| Copyright (C) 2006 Free Software Foundation |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.java.lang.management; |
| |
| import gnu.classpath.SystemProperties; |
| |
| import java.lang.management.MemoryPoolMXBean; |
| import java.lang.management.MemoryUsage; |
| |
| import javax.management.NotCompliantMBeanException; |
| |
| /** |
| * Provides access to information about one of the memory |
| * resources or pools used by the current invocation of the |
| * virtual machine. An instance of this bean for each memory |
| * pool is obtained by calling |
| * {@link ManagementFactory#getMemoryPoolMXBeans()}. |
| * |
| * @author Andrew John Hughes (gnu_andrew@member.fsf.org) |
| * @since 1.5 |
| */ |
| public final class MemoryPoolMXBeanImpl |
| extends BeanImpl |
| implements MemoryPoolMXBean |
| { |
| |
| /** |
| * The name of the pool. |
| */ |
| private String name; |
| |
| /** |
| * Constant for collection usage threshold. |
| */ |
| private static final String COLLECTION_USAGE_THRESHOLD = |
| "gnu.java.lang.management.CollectionUsageThresholdSupport"; |
| |
| /** |
| * Constant for thread time support. |
| */ |
| private static final String USAGE_THRESHOLD = |
| "gnu.java.lang.management.UsageThresholdSupport"; |
| |
| /** |
| * Constructs a new <code>MemoryPoolMXBeanImpl</code>. |
| * |
| * @param name the name of the pool this bean represents. |
| * @throws NotCompliantMBeanException if this class doesn't implement |
| * the interface or a method appears |
| * in the interface that doesn't comply |
| * with the naming conventions. |
| */ |
| public MemoryPoolMXBeanImpl(String name) |
| throws NotCompliantMBeanException |
| { |
| super(MemoryPoolMXBean.class); |
| this.name = name; |
| } |
| |
| public MemoryUsage getCollectionUsage() |
| { |
| return VMMemoryPoolMXBeanImpl.getCollectionUsage(name); |
| } |
| |
| public long getCollectionUsageThreshold() |
| { |
| if (isCollectionUsageThresholdSupported()) |
| return VMMemoryPoolMXBeanImpl.getCollectionUsageThreshold(name); |
| else |
| throw new UnsupportedOperationException("A collection usage "+ |
| "threshold is not supported."); |
| } |
| |
| public long getCollectionUsageThresholdCount() |
| { |
| if (isCollectionUsageThresholdSupported()) |
| return VMMemoryPoolMXBeanImpl.getCollectionUsageThresholdCount(name); |
| else |
| throw new UnsupportedOperationException("A collection usage "+ |
| "threshold is not supported."); |
| } |
| |
| public String[] getMemoryManagerNames() |
| { |
| return VMMemoryPoolMXBeanImpl.getMemoryManagerNames(name); |
| } |
| |
| public String getName() |
| { |
| return name; |
| } |
| |
| public MemoryUsage getPeakUsage() |
| { |
| if (isValid()) |
| return VMMemoryPoolMXBeanImpl.getPeakUsage(name); |
| else |
| return null; |
| } |
| |
| public String getType() |
| { |
| return VMMemoryPoolMXBeanImpl.getType(name); |
| } |
| |
| public MemoryUsage getUsage() |
| { |
| if (isValid()) |
| return VMMemoryPoolMXBeanImpl.getUsage(name); |
| else |
| return null; |
| } |
| |
| public long getUsageThreshold() |
| { |
| if (isUsageThresholdSupported()) |
| return VMMemoryPoolMXBeanImpl.getUsageThreshold(name); |
| else |
| throw new UnsupportedOperationException("A usage threshold " + |
| "is not supported."); |
| } |
| |
| public long getUsageThresholdCount() |
| { |
| if (isUsageThresholdSupported()) |
| return VMMemoryPoolMXBeanImpl.getUsageThresholdCount(name); |
| else |
| throw new UnsupportedOperationException("A usage threshold " + |
| "is not supported."); |
| } |
| |
| public boolean isCollectionUsageThresholdExceeded() |
| { |
| return getCollectionUsage().getUsed() >= getCollectionUsageThreshold(); |
| } |
| |
| public boolean isCollectionUsageThresholdSupported() |
| { |
| return SystemProperties.getProperty(COLLECTION_USAGE_THRESHOLD) != null; |
| } |
| |
| public boolean isUsageThresholdExceeded() |
| { |
| return getUsage().getUsed() >= getUsageThreshold(); |
| } |
| |
| public boolean isUsageThresholdSupported() |
| { |
| return SystemProperties.getProperty(USAGE_THRESHOLD) != null; |
| } |
| |
| public boolean isValid() |
| { |
| return VMMemoryPoolMXBeanImpl.isValid(name); |
| } |
| |
| public void resetPeakUsage() |
| { |
| checkControlPermissions(); |
| VMMemoryPoolMXBeanImpl.resetPeakUsage(name); |
| } |
| |
| public void setCollectionUsageThreshold(long threshold) |
| { |
| checkControlPermissions(); |
| if (threshold < 0) |
| throw new IllegalArgumentException("Threshold of " + threshold + |
| "is less than zero."); |
| if (isCollectionUsageThresholdSupported()) |
| VMMemoryPoolMXBeanImpl.setCollectionUsageThreshold(name, threshold); |
| else |
| throw new UnsupportedOperationException("A collection usage "+ |
| "threshold is not supported."); |
| } |
| |
| public void setUsageThreshold(long threshold) |
| { |
| checkControlPermissions(); |
| if (threshold < 0) |
| throw new IllegalArgumentException("Threshold of " + threshold + |
| "is less than zero."); |
| if (isUsageThresholdSupported()) |
| VMMemoryPoolMXBeanImpl.setUsageThreshold(name, threshold); |
| else |
| throw new UnsupportedOperationException("A usage threshold " + |
| "is not supported."); |
| } |
| |
| } |
| |