jdk/src/jdk.jvmstat/share/classes/sun/jvmstat/perfdata/monitor/PerfDataBufferImpl.java
--- a/jdk/src/jdk.jvmstat/share/classes/sun/jvmstat/perfdata/monitor/PerfDataBufferImpl.java Fri Feb 03 09:28:13 2017 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,358 +0,0 @@
-/*
- * Copyright (c) 2004, 2014, 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.jvmstat.perfdata.monitor;
-
-import sun.jvmstat.monitor.*;
-import java.util.*;
-import java.nio.*;
-import java.io.*;
-import java.net.*;
-import java.util.regex.*;
-
-/**
- * The base classes for the concrete implementations of the HotSpot
- * PerfData instrumentation buffer.
- *
- * @author Brian Doherty
- * @since 1.5
- * @see AbstractPerfDataBuffer
- */
-public abstract class PerfDataBufferImpl {
-
- /**
- * The buffer containing the instrumentation data.
- */
- protected ByteBuffer buffer;
-
- /**
- * A Map of monitor objects found in the instrumentation buffer.
- */
- protected Map<String, Monitor> monitors;
-
- /**
- * The Local Java Virtual Machine Identifier for this buffer.
- */
- protected int lvmid;
-
- /**
- * A Map of monitor object names to aliases as read in from the alias map
- * file.
- */
- protected Map<String, ArrayList<String>> aliasMap;
-
- /**
- * A cache of resolved monitor aliases.
- */
- protected Map<String, Monitor> aliasCache;
-
-
- /**
- * Constructor.
- *
- * @param buffer the ByteBuffer containing the instrumentation data.
- * @param lvmid the Local Java Virtual Machine Identifier for this
- * instrumentation buffer.
- */
- protected PerfDataBufferImpl(ByteBuffer buffer, int lvmid) {
- this.buffer = buffer;
- this.lvmid = lvmid;
- this.monitors = new TreeMap<>();
- this.aliasMap = new HashMap<>();
- this.aliasCache = new HashMap<>();
- }
-
- /**
- * Get the Local Java Virtual Machine Identifier, or <em>lvmid</em>
- * for the target JVM associated with this instrumentation buffer.
- *
- * @return int - the lvmid
- */
- public int getLocalVmId() {
- return lvmid;
- }
-
- /**
- * Get a copy of the raw instrumentation data.
- * This method is used to get a copy of the current bytes in the
- * instrumentation buffer. It is generally used for transporting
- * those bytes over the network.
- *
- * @return byte[] - a copy of the bytes in the instrumentation buffer.
- */
- public byte[] getBytes() {
- ByteBuffer bb = null;
- synchronized (this) {
- /*
- * this operation is potentially time consuming, and the result
- * is unused when the getBytes() interface is used. However, the
- * call is necessary in order to synchronize this monitoring
- * client with the target jvm, which assures that the receiver
- * of the byte[] gets an image that is initialized to a usable
- * state. Otherwise, they might only get a snapshot of an
- * empty instrumentation buffer immediately after it was created.
- */
- try {
- if (monitors.isEmpty()) {
- buildMonitorMap(monitors);
- }
- } catch (MonitorException e) {
- /*
- * just ignore this here and let the receiver of the
- * byte[] detect and handle the problem.
- */
- }
- bb = buffer.duplicate();
- }
- bb.rewind();
- byte[] bytes = new byte[bb.limit()];
- bb.get(bytes);
- return bytes;
- }
-
- /**
- * Get the capacity of the instrumentation buffer.
- *
- * @return int - the capacity, or size, of the instrumentation buffer.
- */
- public int getCapacity() {
- return buffer.capacity();
- }
-
- /**
- * Get the ByteBuffer containing the instrumentation data.
- *
- * @return ByteBuffer - a ByteBuffer object that refers to the
- * instrumentation data.
- */
- ByteBuffer getByteBuffer() {
- // receiver is responsible for assuring that the buffer's state
- // is that of an initialized target.
- return buffer;
- }
-
- /**
- * Build the alias mapping. Uses the default alias map file unless
- * the sun.jvmstat.perfdata.aliasmap file indicates some other
- * file as the source.
- */
- @SuppressWarnings("deprecation")
- private void buildAliasMap() {
- assert Thread.holdsLock(this);
-
- URL aliasURL = null;
- String filename = System.getProperty("sun.jvmstat.perfdata.aliasmap");
-
- if (filename != null) {
- File f = new File(filename);
- try {
- aliasURL = f.toURL();
-
- } catch (MalformedURLException e) {
- throw new IllegalArgumentException(e);
- }
- } else {
- aliasURL = getClass().getResource(
- "/sun/jvmstat/perfdata/resources/aliasmap");
- }
-
- assert aliasURL != null;
-
- AliasFileParser aliasParser = new AliasFileParser(aliasURL);
-
- try {
- aliasParser.parse(aliasMap);
-
- } catch (IOException e) {
- System.err.println("Error processing " + filename + ": "
- + e.getMessage());
- } catch (SyntaxException e) {
- System.err.println("Syntax error parsing " + filename + ": "
- + e.getMessage());
- }
- }
-
- /**
- * Find the Monitor object for the named counter by using one of its
- * aliases.
- */
- protected Monitor findByAlias(String name) {
- assert Thread.holdsLock(this);
-
- Monitor m = aliasCache.get(name);
- if (m == null) {
- ArrayList<String> al = aliasMap.get(name);
- if (al != null) {
- for (Iterator<String> i = al.iterator(); i.hasNext() && m == null; ) {
- String alias = i.next();
- m = monitors.get(alias);
- }
- }
- }
- return m;
- }
-
-
- /**
- * Find a named Instrumentation object.
- *
- * This method will look for the named instrumentation object in the
- * instrumentation exported by this Java Virtual Machine. If an
- * instrumentation object with the given name exists, a Monitor interface
- * to that object will be return. Otherwise, the method returns
- * {@code null}. The method will map requests for instrumention objects
- * using old names to their current names, if applicable.
- *
- *
- *
- * @param name the name of the Instrumentation object to find.
- * @return Monitor - the {@link Monitor} object that can be used to
- * monitor the named instrumentation object, or
- * {@code null} if the named object doesn't exist.
- * @throws MonitorException Thrown if an error occurs while communicating
- * with the target Java Virtual Machine.
- */
- public Monitor findByName(String name) throws MonitorException {
- Monitor m = null;
-
- synchronized (this) {
- if (monitors.isEmpty()) {
- buildMonitorMap(monitors);
- buildAliasMap();
- }
-
- // look for the requested monitor
- m = monitors.get(name);
- if (m == null) {
- // not found - load any new monitors, and try again.
- getNewMonitors(monitors);
- m = monitors.get(name);
- }
- if (m == null) {
- // still not found, look for aliases
- m = findByAlias(name);
- }
- }
- return m;
- }
-
- /**
- * Find all Instrumentation objects with names matching the given pattern.
- *
- * This method returns a {@link List} of Monitor objects such that
- * the name of each object matches the given pattern.
- *
- * @param patternString a string containing a pattern as described in
- * {@link java.util.regex.Pattern}.
- * @return {@code List<Monitor>} - a List of {@link Monitor}
- * objects that can be used to
- * monitor the instrumentation objects whose names match
- * the given pattern. If no instrumentation objects have`
- * names matching the given pattern, then an empty List
- * is returned.
- * @throws MonitorException Thrown if an error occurs while communicating
- * with the target Java Virtual Machine.
- * @see java.util.regex.Pattern
- */
- public List<Monitor> findByPattern(String patternString)
- throws MonitorException, PatternSyntaxException {
-
- synchronized(this) {
- if (monitors.isEmpty()) {
- buildMonitorMap(monitors);
- } else {
- getNewMonitors(monitors);
- }
- }
-
- Pattern pattern = Pattern.compile(patternString);
- Matcher matcher = pattern.matcher("");
- List<Monitor> matches = new ArrayList<>();
-
- Set<Map.Entry<String,Monitor>> monitorSet = monitors.entrySet();
-
- for (Iterator<Map.Entry<String, Monitor>> i = monitorSet.iterator(); i.hasNext(); /* empty */) {
- Map.Entry<String, Monitor> me = i.next();
- String name = me.getKey();
- Monitor m = me.getValue();
-
- // apply pattern to monitor item name
- matcher.reset(name);
-
- // if the pattern matches, then add monitor to list
- if (matcher.lookingAt()) {
- matches.add(me.getValue());
- }
- }
- return matches;
- }
-
- /**
- * Get a list of the inserted and removed monitors since last called.
- *
- * @return MonitorStatus - the status of available Monitors for the
- * target Java Virtual Machine.
- * @throws MonitorException Thrown if communications errors occur
- * while communicating with the target.
- */
- public MonitorStatus getMonitorStatus() throws MonitorException {
- synchronized(this) {
- if (monitors.isEmpty()) {
- buildMonitorMap(monitors);
- }
- return getMonitorStatus(monitors);
- }
- }
-
- // PerfDataBuffer implementation specific classes
-
- /**
- * get the list of inserted and removed monitors since last called.
- *
- * @param m the map of Monitors.
- * @throws MonitorException Thrown if communications errors occur
- * while communicating with the target.
- */
- protected abstract MonitorStatus getMonitorStatus(Map<String, Monitor> m)
- throws MonitorException;
-
- /**
- * build the map of Monitor objects.
- *
- * @param m the map of Monitors.
- * @throws MonitorException Thrown if communications errors occur
- * while communicating with the target.
- */
- protected abstract void buildMonitorMap(Map<String, Monitor> m) throws MonitorException;
-
- /**
- * get the new Monitor objects from the Map of Monitor objects.
- *
- * @param m the map of Monitors.
- * @throws MonitorException Thrown if communications errors occur
- * while communicating with the target.
- */
- protected abstract void getNewMonitors(Map<String, Monitor> m) throws MonitorException;
-}