| /* |
| * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.management; |
| |
| import java.lang.management.GarbageCollectorMXBean; |
| import java.lang.management.MemoryUsage; |
| import javax.management.openmbean.OpenType; |
| import javax.management.openmbean.SimpleType; |
| import javax.management.openmbean.TabularType; |
| import javax.management.openmbean.TabularData; |
| import javax.management.openmbean.TabularDataSupport; |
| import javax.management.openmbean.CompositeType; |
| import javax.management.openmbean.CompositeData; |
| import javax.management.openmbean.CompositeDataSupport; |
| import javax.management.openmbean.OpenDataException; |
| import com.sun.management.GcInfo; |
| |
| /** |
| * Helper class to build composite data. |
| */ |
| public class GcInfoBuilder { |
| private final GarbageCollectorMXBean gc; |
| private final String[] poolNames; |
| private String[] allItemNames; |
| |
| // GC-specific composite type: |
| // Each GarbageCollectorMXBean may have different GC-specific attributes |
| // the CompositeType for the GcInfo could be different. |
| private CompositeType gcInfoCompositeType; |
| |
| // GC-specific items |
| private final int gcExtItemCount; |
| private final String[] gcExtItemNames; |
| private final String[] gcExtItemDescs; |
| private final char[] gcExtItemTypes; |
| |
| GcInfoBuilder(GarbageCollectorMXBean gc, String[] poolNames) { |
| this.gc = gc; |
| this.poolNames = poolNames; |
| this.gcExtItemCount = getNumGcExtAttributes(gc); |
| this.gcExtItemNames = new String[gcExtItemCount]; |
| this.gcExtItemDescs = new String[gcExtItemCount]; |
| this.gcExtItemTypes = new char[gcExtItemCount]; |
| |
| // Fill the information about extension attributes |
| fillGcAttributeInfo(gc, gcExtItemCount, gcExtItemNames, |
| gcExtItemTypes, gcExtItemDescs); |
| |
| // lazily build the CompositeType for the GcInfo |
| // including the GC-specific extension attributes |
| this.gcInfoCompositeType = null; |
| } |
| |
| GcInfo getLastGcInfo() { |
| MemoryUsage[] usageBeforeGC = new MemoryUsage[poolNames.length]; |
| MemoryUsage[] usageAfterGC = new MemoryUsage[poolNames.length]; |
| Object[] values = new Object[gcExtItemCount]; |
| |
| return getLastGcInfo0(gc, gcExtItemCount, values, gcExtItemTypes, |
| usageBeforeGC, usageAfterGC); |
| } |
| |
| public String[] getPoolNames() { |
| return poolNames; |
| } |
| |
| int getGcExtItemCount() { |
| return gcExtItemCount; |
| } |
| |
| // Returns the CompositeType for the GcInfo including |
| // the extension attributes |
| synchronized CompositeType getGcInfoCompositeType() { |
| if (gcInfoCompositeType != null) |
| return gcInfoCompositeType; |
| |
| // First, fill with the attributes in the GcInfo |
| String[] gcInfoItemNames = GcInfoCompositeData.getBaseGcInfoItemNames(); |
| OpenType[] gcInfoItemTypes = GcInfoCompositeData.getBaseGcInfoItemTypes(); |
| int numGcInfoItems = gcInfoItemNames.length; |
| |
| int itemCount = numGcInfoItems + gcExtItemCount; |
| allItemNames = new String[itemCount]; |
| String[] allItemDescs = new String[itemCount]; |
| OpenType<?>[] allItemTypes = new OpenType<?>[itemCount]; |
| |
| System.arraycopy(gcInfoItemNames, 0, allItemNames, 0, numGcInfoItems); |
| System.arraycopy(gcInfoItemNames, 0, allItemDescs, 0, numGcInfoItems); |
| System.arraycopy(gcInfoItemTypes, 0, allItemTypes, 0, numGcInfoItems); |
| |
| // Then fill with the extension GC-specific attributes, if any. |
| if (gcExtItemCount > 0) { |
| fillGcAttributeInfo(gc, gcExtItemCount, gcExtItemNames, |
| gcExtItemTypes, gcExtItemDescs); |
| System.arraycopy(gcExtItemNames, 0, allItemNames, |
| numGcInfoItems, gcExtItemCount); |
| System.arraycopy(gcExtItemDescs, 0, allItemDescs, |
| numGcInfoItems, gcExtItemCount); |
| for (int i = numGcInfoItems, j = 0; j < gcExtItemCount; i++, j++) { |
| switch (gcExtItemTypes[j]) { |
| case 'Z': |
| allItemTypes[i] = SimpleType.BOOLEAN; |
| break; |
| case 'B': |
| allItemTypes[i] = SimpleType.BYTE; |
| break; |
| case 'C': |
| allItemTypes[i] = SimpleType.CHARACTER; |
| break; |
| case 'S': |
| allItemTypes[i] = SimpleType.SHORT; |
| break; |
| case 'I': |
| allItemTypes[i] = SimpleType.INTEGER; |
| break; |
| case 'J': |
| allItemTypes[i] = SimpleType.LONG; |
| break; |
| case 'F': |
| allItemTypes[i] = SimpleType.FLOAT; |
| break; |
| case 'D': |
| allItemTypes[i] = SimpleType.DOUBLE; |
| break; |
| default: |
| throw new AssertionError( |
| "Unsupported type [" + gcExtItemTypes[i] + "]"); |
| } |
| } |
| } |
| |
| CompositeType gict = null; |
| try { |
| final String typeName = |
| "sun.management." + gc.getName() + ".GcInfoCompositeType"; |
| |
| gict = new CompositeType(typeName, |
| "CompositeType for GC info for " + |
| gc.getName(), |
| allItemNames, |
| allItemDescs, |
| allItemTypes); |
| } catch (OpenDataException e) { |
| // shouldn't reach here |
| throw Util.newException(e); |
| } |
| gcInfoCompositeType = gict; |
| |
| return gcInfoCompositeType; |
| } |
| |
| synchronized String[] getItemNames() { |
| if (allItemNames == null) { |
| // initialize when forming the composite type |
| getGcInfoCompositeType(); |
| } |
| return allItemNames; |
| } |
| |
| // Retrieve information about extension attributes |
| private native int getNumGcExtAttributes(GarbageCollectorMXBean gc); |
| private native void fillGcAttributeInfo(GarbageCollectorMXBean gc, |
| int numAttributes, |
| String[] attributeNames, |
| char[] types, |
| String[] descriptions); |
| |
| /** |
| * Returns the last GcInfo |
| * |
| * @param gc GarbageCollectorMXBean that the gc info is associated with. |
| * @param numExtAtts number of extension attributes |
| * @param extAttValues Values of extension attributes to be filled. |
| * @param before Memory usage before GC to be filled. |
| * @param after Memory usage after GC to be filled. |
| */ |
| private native GcInfo getLastGcInfo0(GarbageCollectorMXBean gc, |
| int numExtAtts, |
| Object[] extAttValues, |
| char[] extAttTypes, |
| MemoryUsage[] before, |
| MemoryUsage[] after); |
| } |