diff options
author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
---|---|---|
committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/lang/management/MemoryMXBeanImpl.java | |
download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz |
obtained gcc-4.6.4.tar.bz2 from upstream website;upstream
verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.
downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.
if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
Diffstat (limited to 'libjava/classpath/gnu/java/lang/management/MemoryMXBeanImpl.java')
-rw-r--r-- | libjava/classpath/gnu/java/lang/management/MemoryMXBeanImpl.java | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/lang/management/MemoryMXBeanImpl.java b/libjava/classpath/gnu/java/lang/management/MemoryMXBeanImpl.java new file mode 100644 index 000000000..10e6522f1 --- /dev/null +++ b/libjava/classpath/gnu/java/lang/management/MemoryMXBeanImpl.java @@ -0,0 +1,281 @@ +/* MemoryMXBeanImpl.java - Implementation of a memory 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.javax.management.ListenerData; + +import java.lang.management.MemoryMXBean; +import java.lang.management.MemoryNotificationInfo; +import java.lang.management.MemoryUsage; + +import java.util.ArrayList; +import java.util.Iterator; +import java.util.List; + +import javax.management.ListenerNotFoundException; +import javax.management.MBeanNotificationInfo; +import javax.management.NotCompliantMBeanException; +import javax.management.Notification; +import javax.management.NotificationEmitter; +import javax.management.NotificationFilter; +import javax.management.NotificationListener; + +import javax.management.openmbean.CompositeData; +import javax.management.openmbean.CompositeDataSupport; +import javax.management.openmbean.CompositeType; +import javax.management.openmbean.OpenDataException; +import javax.management.openmbean.OpenType; +import javax.management.openmbean.SimpleType; + +/** + * Provides access to information about the memory + * management of the current invocation of the virtual + * machine. Instances of this bean are obtained by calling + * {@link ManagementFactory#getMemoryMXBean()}. + * + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public final class MemoryMXBeanImpl + extends BeanImpl + implements MemoryMXBean, NotificationEmitter +{ + + private List listeners; + + private long notificationCount; + + public static CompositeType notifType; + + public static CompositeType usageType; + + static + { + try + { + CompositeType usageType = + new CompositeType(MemoryUsage.class.getName(), + "Describes the usage levels of a pool", + new String[] { "init", "used", + "committed", "max" + }, + new String[] { "Initial level", + "Used level", + "Committed level", + "Maximum level" + }, + new OpenType[] { + SimpleType.LONG, SimpleType.LONG, + SimpleType.LONG, SimpleType.LONG + }); + CompositeType notifType = + new CompositeType(MemoryNotificationInfo.class.getName(), + "Provides the notification info on memory usage", + new String[] { "poolName", "usage", "count" }, + new String[] { "Name of the memory pool", + "Usage level of the memory pool", + "Number of times the threshold " + + "has been crossed" + }, + new OpenType[] { + SimpleType.STRING, usageType, SimpleType.LONG + }); + } + catch (OpenDataException e) + { + throw new IllegalStateException("Something went wrong in creating " + + "the composite data types.", e); + } + } + + /** + * Constructs a new <code>MemoryMXBeanImpl</code>. + * + * @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 MemoryMXBeanImpl() + throws NotCompliantMBeanException + { + super(MemoryMXBean.class); + listeners = new ArrayList(); + notificationCount = 0; + } + + public void gc() + { + System.gc(); + } + + public MemoryUsage getHeapMemoryUsage() + { + return VMMemoryMXBeanImpl.getHeapMemoryUsage(); + } + + public MemoryUsage getNonHeapMemoryUsage() + { + return VMMemoryMXBeanImpl.getNonHeapMemoryUsage(); + } + + public int getObjectPendingFinalizationCount() + { + return VMMemoryMXBeanImpl.getObjectPendingFinalizationCount(); + } + + public boolean isVerbose() + { + return VMMemoryMXBeanImpl.isVerbose(); + } + + public void setVerbose(boolean verbose) + { + checkControlPermissions(); + VMMemoryMXBeanImpl.setVerbose(verbose); + } + + public void addNotificationListener(NotificationListener listener, + NotificationFilter filter, + Object passback) + { + if (listener == null) + throw new IllegalArgumentException("Null listener added to bean."); + listeners.add(new ListenerData(listener, filter, passback)); + } + + public MBeanNotificationInfo[] getNotificationInfo() + { + return new MBeanNotificationInfo[] + { + new MBeanNotificationInfo(new String[] + { + MemoryNotificationInfo.MEMORY_COLLECTION_THRESHOLD_EXCEEDED, + MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED + }, + Notification.class.getName(), + "Memory Usage Notifications") + }; + } + + public void removeNotificationListener(NotificationListener listener) + throws ListenerNotFoundException + { + Iterator it = listeners.iterator(); + boolean foundOne = false; + while (it.hasNext()) + { + ListenerData data = (ListenerData) it.next(); + if (data.getListener() == listener) + { + it.remove(); + foundOne = true; + } + } + if (!foundOne) + throw new ListenerNotFoundException("The specified listener, " + listener + + "is not registered with this bean."); + } + + public void removeNotificationListener(NotificationListener listener, + NotificationFilter filter, + Object passback) + throws ListenerNotFoundException + { + if (!(listeners.remove(new ListenerData(listener, filter, passback)))) + { + throw new ListenerNotFoundException("The specified listener, " + listener + + " with filter " + filter + + "and passback " + passback + + ", is not registered with this bean."); + } + } + + void fireNotification(String type, String poolName, long init, long used, + long committed, long max, long count) + { + Notification notif = new Notification(type, this, notificationCount); + MemoryUsage usage = new MemoryUsage(init, used, committed, max); + CompositeData data; + try + { + data = new CompositeDataSupport(notifType, + new String[] { + "poolName", "usage", "count" + }, + new Object[] { + poolName, usage, Long.valueOf(count) + }); + } + catch (OpenDataException e) + { + throw new IllegalStateException("Something went wrong in creating " + + "the composite data instance.", e); + } + notif.setUserData(data); + Iterator it = listeners.iterator(); + while (it.hasNext()) + { + ListenerData ldata = (ListenerData) it.next(); + NotificationFilter filter = ldata.getFilter(); + if (filter == null || filter.isNotificationEnabled(notif)) + ldata.getListener().handleNotification(notif, ldata.getPassback()); + } + ++notificationCount; + } + + void fireThresholdExceededNotification(String poolName, long init, + long used, long committed, + long max, long count) + { + fireNotification(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED, + poolName, init, used, committed, max, count); + } + + void fireCollectionThresholdExceededNotification(String poolName, + long init, + long used, + long committed, + long max, + long count) + { + fireNotification(MemoryNotificationInfo.MEMORY_COLLECTION_THRESHOLD_EXCEEDED, + poolName, init, used, committed, max, count); + } + +} |