jdk/src/jdk.jvmstat/share/classes/sun/jvmstat/perfdata/monitor/protocol/local/PerfDataFile.java
--- a/jdk/src/jdk.jvmstat/share/classes/sun/jvmstat/perfdata/monitor/protocol/local/PerfDataFile.java Fri Feb 03 09:28:13 2017 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,308 +0,0 @@
-/*
- * Copyright (c) 2004, 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.protocol.local;
-
-import java.io.File;
-import java.io.FilenameFilter;
-import jdk.internal.vm.VMSupport;
-
-/**
- * Class to provide translations from the local Vm Identifier
- * name space into the file system name space and vice-versa.
- * <p>
- * Provides a factory for creating a File object to the backing
- * store file for instrumentation shared memory region for a JVM
- * identified by its Local Java Virtual Machine Identifier, or
- * <em>lvmid</em>.
- *
- * @author Brian Doherty
- * @since 1.5
- * @see java.io.File
- */
-public class PerfDataFile {
- private PerfDataFile() { };
-
- /**
- * The name of the of the system dependent temporary directory
- */
- public static final String tmpDirName;
-
- /**
- * The file name prefix for PerfData shared memory files.
- * <p>
- * This prefix must be kept in sync with the prefix used by the JVM.
- */
- public static final String dirNamePrefix = "hsperfdata_";
-
- /**
- * The directory name pattern for the user directories.
- */
- public static final String userDirNamePattern = "hsperfdata_\\S*";
-
- /**
- * The file name pattern for PerfData shared memory files.
- * <p>
- * This pattern must be kept in synch with the file name pattern
- * used by the 1.4.2 and later HotSpot JVM.
- */
- public static final String fileNamePattern = "^[0-9]+$";
-
- /**
- * The file name pattern for 1.4.1 PerfData shared memory files.
- * <p>
- * This pattern must be kept in synch with the file name pattern
- * used by the 1.4.1 HotSpot JVM.
- */
- public static final String tmpFileNamePattern =
- "^hsperfdata_[0-9]+(_[1-2]+)?$";
-
-
- /**
- * Get a File object for the instrumentation backing store file
- * for the JVM identified by the given local Vm Identifier.
- * <p>
- * This method looks for the most up to date backing store file for
- * the given {@code lvmid}. It will search all the user specific
- * directories in the temporary directory for the host operating
- * system, which may be influenced by platform specific environment
- * variables.
- *
- * @param lvmid the local Java Virtual Machine Identifier for the target
- * @return File - a File object to the backing store file for the named
- * shared memory region of the target JVM.
- * @see java.io.File
- * @see #getTempDirectory()
- */
- public static File getFile(int lvmid) {
- if (lvmid == 0) {
- /*
- * lvmid == 0 is used to indicate the current Java Virtual Machine.
- * If the SDK provided an API to get a unique Java Virtual Machine
- * identifier, then a filename could be constructed with that
- * identifier. In absence of such an api, return null.
- */
- return null;
- }
-
- /*
- * iterate over all files in all directories in tmpDirName that
- * match the file name patterns.
- */
- File tmpDir = new File(tmpDirName);
- String[] files = tmpDir.list(new FilenameFilter() {
- public boolean accept(File dir, String name) {
- if (!name.startsWith(dirNamePrefix)) {
- return false;
- }
- File candidate = new File(dir, name);
- return ((candidate.isDirectory() || candidate.isFile())
- && candidate.canRead());
- }
- });
-
- long newestTime = 0;
- File newest = null;
-
- for (int i = 0; i < files.length; i++) {
- File f = new File(tmpDirName + files[i]);
- File candidate = null;
-
- if (f.exists() && f.isDirectory()) {
- /*
- * found a directory matching the name patterns. This
- * is a 1.4.2 hsperfdata_<user> directory. Check for
- * file named <lvmid> in that directory
- */
- String name = Integer.toString(lvmid);
- candidate = new File(f.getName(), name);
-
- } else if (f.exists() && f.isFile()) {
- /*
- * found a file matching the name patterns. This
- * is a 1.4.1 hsperfdata_<lvmid> file.
- */
- candidate = f;
-
- } else {
- // unexpected - let conditional below filter this one out
- candidate = f;
- }
-
- if (candidate.exists() && candidate.isFile()
- && candidate.canRead()) {
- long modTime = candidate.lastModified();
- if (modTime >= newestTime) {
- newestTime = modTime;
- newest = candidate;
- }
- }
- }
- return newest;
- }
-
- /**
- * Return the File object for the backing store file for the specified Java
- * Virtual Machine.
- * <p>
- * This method looks for the most up to date backing store file for
- * the JVM identified by the given user name and lvmid. The directory
- * searched is the temporary directory for the host operating system,
- * which may be influenced by environment variables.
- *
- * @param user the user name
- * @param lvmid the local Java Virtual Machine Identifier for the target
- * @return File - a File object to the backing store file for the named
- * shared memory region of the target JVM.
- * @see java.io.File
- * @see #getTempDirectory()
- */
- public static File getFile(String user, int lvmid) {
- if (lvmid == 0) {
- /*
- * lvmid == 0 is used to indicate the current Java Virtual Machine.
- * If the SDK provided an API to get a unique Java Virtual Machine
- * identifier, then a filename could be constructed with that
- * identifier. In absence of such an api, return null.
- */
- return null;
- }
-
- // first try for 1.4.2 and later JVMs
- String basename = getTempDirectory(user) + Integer.toString(lvmid);
- File f = new File(basename);
-
- if (f.exists() && f.isFile() && f.canRead()) {
- return f;
- }
-
- // No hit on 1.4.2 JVMs, try 1.4.1 files
- long newestTime = 0;
- File newest = null;
- for (int i = 0; i < 2; i++) {
- if (i == 0) {
- basename = getTempDirectory() + Integer.toString(lvmid);
- } else {
- basename = getTempDirectory() + Integer.toString(lvmid)
- + Integer.toString(i);
- }
-
- f = new File(basename);
-
- if (f.exists() && f.isFile() && f.canRead()) {
- long modTime = f.lastModified();
- if (modTime >= newestTime) {
- newestTime = modTime;
- newest = f;
- }
- }
- }
- return newest;
- }
-
- /**
- * Method to extract a local Java Virtual Machine Identifier from the
- * file name of the given File object.
- *
- * @param file A File object representing the name of a
- * shared memory region for a target JVM
- * @return int - the local Java Virtual Machine Identifier for the target
- * associated with the file
- * @throws java.lang.IllegalArgumentException Thrown if the file name
- * does not conform to the expected pattern
- */
- public static int getLocalVmId(File file) {
- try {
- // try 1.4.2 and later format first
- return Integer.parseInt(file.getName());
- } catch (NumberFormatException e) { }
-
- // now try the 1.4.1 format
- String name = file.getName();
- if (name.startsWith(dirNamePrefix)) {
- int first = name.indexOf('_');
- int last = name.lastIndexOf('_');
- try {
- if (first == last) {
- return Integer.parseInt(name.substring(first + 1));
- } else {
- return Integer.parseInt(name.substring(first + 1, last));
- }
- } catch (NumberFormatException e) { }
- }
- throw new IllegalArgumentException("file name does not match pattern");
- }
-
- /**
- * Return the name of the temporary directory being searched for
- * HotSpot PerfData backing store files.
- * <p>
- * This method generally returns the value of the java.io.tmpdir
- * property. However, on some platforms it may return a different
- * directory, as the JVM implementation may store the PerfData backing
- * store files in a different directory for performance reasons.
- *
- * @return String - the name of the temporary directory.
- */
- public static String getTempDirectory() {
- return tmpDirName;
- }
-
- /**
- * Return the name of the temporary directory to be searched
- * for HotSpot PerfData backing store files for a given user.
- * <p>
- * This method generally returns the name of a subdirectory of
- * the directory indicated in the java.io.tmpdir property. However,
- * on some platforms it may return a different directory, as the
- * JVM implementation may store the PerfData backing store files
- * in a different directory for performance reasons.
- *
- * @return String - the name of the temporary directory.
- */
- public static String getTempDirectory(String user) {
- return tmpDirName + dirNamePrefix + user + File.separator;
- }
-
- static {
- /*
- * For this to work, the target VM and this code need to use
- * the same directory. Instead of guessing which directory the
- * VM is using, we will ask.
- */
- String tmpdir = VMSupport.getVMTemporaryDirectory();
-
- /*
- * Assure that the string returned has a trailing File.separator
- * character. This check was added because the Linux implementation
- * changed such that the java.io.tmpdir string no longer terminates
- * with a File.separator character.
- */
- if (tmpdir.lastIndexOf(File.separator) != (tmpdir.length()-1)) {
- tmpdir = tmpdir + File.separator;
- }
- tmpDirName = tmpdir;
- }
-}