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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/lang/management/MemoryPoolMXBeanImpl.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/lang/management/MemoryPoolMXBeanImpl.java | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/lang/management/MemoryPoolMXBeanImpl.java b/gcc-4.4.3/libjava/classpath/gnu/java/lang/management/MemoryPoolMXBeanImpl.java new file mode 100644 index 000000000..e314ca164 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/lang/management/MemoryPoolMXBeanImpl.java @@ -0,0 +1,227 @@ +/* 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.MemoryType; +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 MemoryType getType() + { + return + MemoryType.valueOf(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."); + } + +} + |