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authorAndrew John Hughes <gnu_andrew@member.fsf.org>2006-07-02 17:28:14 +0000
committerAndrew John Hughes <gnu_andrew@member.fsf.org>2006-07-02 17:28:14 +0000
commite66d5f7cc280d57a7386571ce3b9b2ba5c9550a0 (patch)
tree5600acbe763f717bcf389a0f766ef1707443e7d3 /vm/reference/gnu/java/lang/management/VMMemoryMXBeanImpl.java
parent001be4f78fd48d32c7a718222b0d3215147993cf (diff)
downloadclasspath-e66d5f7cc280d57a7386571ce3b9b2ba5c9550a0.tar.gz
2006-07-01 Andrew John Hughes <gnu_andrew@member.fsf.org>
* NEWS: Updated to include VMMemoryMXBeanImpl. * doc/vmintegration.texinfo: Likewise. * examples/gnu/classpath/examples/management/TestMemory.java: New file. * gnu/java/lang/management/ClassLoadingMXBeanImpl.java: Remove redundant import. * gnu/java/lang/management/MemoryMXBeanImpl.java: New file. * gnu/java/lang/management/ThreadMXBeanImpl.java: Remove redundant import. * java/lang/management/ManagementFactory.java: (getMemoryMXBean()): Implemented. * java/lang/management/MemoryMXBean.java, * java/lang/management/MemoryUsage.java: New files. * java/lang/management/ThreadInfo.java: (toString()): Updated documentation. * vm/reference/gnu/java/lang/management/VMMemoryMXBeanImpl.java: New file.
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+/* VMMemoryMXBeanImpl.java - VM impl. 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 java.lang.management.MemoryUsage;
+
+/**
+ * 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
+ */
+final class VMMemoryMXBeanImpl
+{
+
+ /**
+ * Returns an instance of {@link java.lang.management.MemoryUsage}
+ * with appropriate initial, used, committed and maximum values
+ * for the heap.
+ *
+ * @return an {@link java.lang.management.MemoryUsage} instance
+ * for the heap.
+ */
+ static native MemoryUsage getHeapMemoryUsage();
+
+ /**
+ * Returns an instance of {@link java.lang.management.MemoryUsage}
+ * with appropriate initial, used, committed and maximum values
+ * for non-heap memory.
+ *
+ * @return an {@link java.lang.management.MemoryUsage} instance
+ * for non-heap memory.
+ */
+ static native MemoryUsage getNonHeapMemoryUsage();
+
+ /**
+ * Returns the number of objects ready to be garbage collected.
+ *
+ * @return the number of finalizable objects.
+ */
+ static native int getObjectPendingFinalizationCount();
+
+ /**
+ * Returns true if the virtual machine will emit additional
+ * information when memory is allocated and deallocated. The
+ * format of the output is left up to the virtual machine.
+ *
+ * @return true if verbose class loading output is on.
+ */
+ static native boolean isVerbose();
+
+ /**
+ * Turns on or off the emission of additional information
+ * when memory is allocated and deallocated. The format of the
+ * output is left up to the virtual machine. This method
+ * may be called by multiple threads concurrently, but there
+ * is only one global setting of verbosity that is affected.
+ *
+ * @param verbose the new setting for verbose class loading
+ * output.
+ */
+ static native void setVerbose(boolean verbose);
+
+}