feat(jdk8): move files to new folder to avoid resources compiled.
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jdkSrc/jdk8/sun/management/GcInfoBuilder.java
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205
jdkSrc/jdk8/sun/management/GcInfoBuilder.java
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/*
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* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.management;
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import java.lang.management.GarbageCollectorMXBean;
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import java.lang.management.MemoryUsage;
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import javax.management.openmbean.OpenType;
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import javax.management.openmbean.SimpleType;
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import javax.management.openmbean.TabularType;
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import javax.management.openmbean.TabularData;
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import javax.management.openmbean.TabularDataSupport;
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import javax.management.openmbean.CompositeType;
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import javax.management.openmbean.CompositeData;
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import javax.management.openmbean.CompositeDataSupport;
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import javax.management.openmbean.OpenDataException;
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import com.sun.management.GcInfo;
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/**
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* Helper class to build composite data.
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*/
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public class GcInfoBuilder {
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private final GarbageCollectorMXBean gc;
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private final String[] poolNames;
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private String[] allItemNames;
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// GC-specific composite type:
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// Each GarbageCollectorMXBean may have different GC-specific attributes
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// the CompositeType for the GcInfo could be different.
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private CompositeType gcInfoCompositeType;
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// GC-specific items
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private final int gcExtItemCount;
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private final String[] gcExtItemNames;
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private final String[] gcExtItemDescs;
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private final char[] gcExtItemTypes;
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GcInfoBuilder(GarbageCollectorMXBean gc, String[] poolNames) {
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this.gc = gc;
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this.poolNames = poolNames;
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this.gcExtItemCount = getNumGcExtAttributes(gc);
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this.gcExtItemNames = new String[gcExtItemCount];
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this.gcExtItemDescs = new String[gcExtItemCount];
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this.gcExtItemTypes = new char[gcExtItemCount];
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// Fill the information about extension attributes
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fillGcAttributeInfo(gc, gcExtItemCount, gcExtItemNames,
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gcExtItemTypes, gcExtItemDescs);
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// lazily build the CompositeType for the GcInfo
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// including the GC-specific extension attributes
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this.gcInfoCompositeType = null;
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}
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GcInfo getLastGcInfo() {
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MemoryUsage[] usageBeforeGC = new MemoryUsage[poolNames.length];
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MemoryUsage[] usageAfterGC = new MemoryUsage[poolNames.length];
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Object[] values = new Object[gcExtItemCount];
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return getLastGcInfo0(gc, gcExtItemCount, values, gcExtItemTypes,
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usageBeforeGC, usageAfterGC);
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}
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public String[] getPoolNames() {
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return poolNames;
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}
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int getGcExtItemCount() {
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return gcExtItemCount;
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}
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// Returns the CompositeType for the GcInfo including
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// the extension attributes
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synchronized CompositeType getGcInfoCompositeType() {
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if (gcInfoCompositeType != null)
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return gcInfoCompositeType;
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// First, fill with the attributes in the GcInfo
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String[] gcInfoItemNames = GcInfoCompositeData.getBaseGcInfoItemNames();
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OpenType[] gcInfoItemTypes = GcInfoCompositeData.getBaseGcInfoItemTypes();
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int numGcInfoItems = gcInfoItemNames.length;
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int itemCount = numGcInfoItems + gcExtItemCount;
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allItemNames = new String[itemCount];
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String[] allItemDescs = new String[itemCount];
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OpenType<?>[] allItemTypes = new OpenType<?>[itemCount];
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System.arraycopy(gcInfoItemNames, 0, allItemNames, 0, numGcInfoItems);
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System.arraycopy(gcInfoItemNames, 0, allItemDescs, 0, numGcInfoItems);
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System.arraycopy(gcInfoItemTypes, 0, allItemTypes, 0, numGcInfoItems);
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// Then fill with the extension GC-specific attributes, if any.
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if (gcExtItemCount > 0) {
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fillGcAttributeInfo(gc, gcExtItemCount, gcExtItemNames,
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gcExtItemTypes, gcExtItemDescs);
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System.arraycopy(gcExtItemNames, 0, allItemNames,
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numGcInfoItems, gcExtItemCount);
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System.arraycopy(gcExtItemDescs, 0, allItemDescs,
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numGcInfoItems, gcExtItemCount);
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for (int i = numGcInfoItems, j = 0; j < gcExtItemCount; i++, j++) {
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switch (gcExtItemTypes[j]) {
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case 'Z':
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allItemTypes[i] = SimpleType.BOOLEAN;
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break;
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case 'B':
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allItemTypes[i] = SimpleType.BYTE;
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break;
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case 'C':
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allItemTypes[i] = SimpleType.CHARACTER;
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break;
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case 'S':
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allItemTypes[i] = SimpleType.SHORT;
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break;
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case 'I':
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allItemTypes[i] = SimpleType.INTEGER;
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break;
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case 'J':
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allItemTypes[i] = SimpleType.LONG;
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break;
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case 'F':
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allItemTypes[i] = SimpleType.FLOAT;
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break;
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case 'D':
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allItemTypes[i] = SimpleType.DOUBLE;
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break;
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default:
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throw new AssertionError(
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"Unsupported type [" + gcExtItemTypes[i] + "]");
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}
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}
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}
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CompositeType gict = null;
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try {
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final String typeName =
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"sun.management." + gc.getName() + ".GcInfoCompositeType";
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gict = new CompositeType(typeName,
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"CompositeType for GC info for " +
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gc.getName(),
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allItemNames,
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allItemDescs,
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allItemTypes);
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} catch (OpenDataException e) {
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// shouldn't reach here
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throw Util.newException(e);
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}
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gcInfoCompositeType = gict;
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return gcInfoCompositeType;
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}
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synchronized String[] getItemNames() {
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if (allItemNames == null) {
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// initialize when forming the composite type
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getGcInfoCompositeType();
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}
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return allItemNames;
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}
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// Retrieve information about extension attributes
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private native int getNumGcExtAttributes(GarbageCollectorMXBean gc);
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private native void fillGcAttributeInfo(GarbageCollectorMXBean gc,
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int numAttributes,
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String[] attributeNames,
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char[] types,
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String[] descriptions);
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/**
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* Returns the last GcInfo
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*
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* @param gc GarbageCollectorMXBean that the gc info is associated with.
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* @param numExtAtts number of extension attributes
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* @param extAttValues Values of extension attributes to be filled.
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* @param before Memory usage before GC to be filled.
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* @param after Memory usage after GC to be filled.
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*/
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private native GcInfo getLastGcInfo0(GarbageCollectorMXBean gc,
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int numExtAtts,
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Object[] extAttValues,
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char[] extAttTypes,
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MemoryUsage[] before,
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MemoryUsage[] after);
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}
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