JDK 17 jdk.jfr.jmod - JFR Module
JDK 17 jdk.jfr.jmod is the JMOD file for JDK 17 JFR module.
JDK 17 JFR module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\jdk.jfr.jmod.
JDK 17 JFR module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.
JDK 17 JFR module source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\jdk.jfr.
You can click and view the content of each source code file in the list below.
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⏎ jdk/jfr/internal/consumer/RepositoryFiles.java
/*
* Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package jdk.jfr.internal.consumer;
import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Path;
import java.nio.file.attribute.FileTime;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.NavigableMap;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import jdk.jfr.internal.LogLevel;
import jdk.jfr.internal.LogTag;
import jdk.jfr.internal.Logger;
import jdk.jfr.internal.Repository;
import jdk.jfr.internal.SecuritySupport.SafePath;
public final class RepositoryFiles {
private static final Object WAIT_OBJECT = new Object();
private static final String DIRECTORY_PATTERN = "DDDD_DD_DD_DD_DD_DD_";
public static void notifyNewFile() {
synchronized (WAIT_OBJECT) {
WAIT_OBJECT.notifyAll();
}
}
private final FileAccess fileAccess;
private final NavigableMap<Long, Path> pathSet = new TreeMap<>();
private final Map<Path, Long> pathLookup = new HashMap<>();
private final Object waitObject;
private boolean allowSubDirectory;
private volatile boolean closed;
private Path repository;
public RepositoryFiles(FileAccess fileAccess, Path repository, boolean allowSubDirectory) {
this.repository = repository;
this.fileAccess = fileAccess;
this.waitObject = repository == null ? WAIT_OBJECT : new Object();
this.allowSubDirectory = allowSubDirectory;
}
long getTimestamp(Path p) {
return pathLookup.get(p);
}
public Path lastPath(boolean wait) {
if (updatePaths(wait)) {
return pathSet.lastEntry().getValue();
}
return null; // closed
}
public Path firstPath(long startTimeNanos, boolean wait) {
if (updatePaths(wait)) {
// Pick closest chunk before timestamp
Long time = pathSet.floorKey(startTimeNanos);
if (time != null) {
startTimeNanos = time;
}
return path(startTimeNanos, wait);
}
return null; // closed
}
private boolean updatePaths(boolean wait) {
int beforeSize = pathLookup.size();
while (!closed) {
try {
if (updatePaths()) {
break;
}
} catch (IOException e) {
Logger.log(LogTag.JFR_SYSTEM_STREAMING, LogLevel.DEBUG, "IOException during repository file scan " + e.getMessage());
// This can happen if a chunk is being removed
// between the file was discovered and an instance
// was accessed, or if new file has been written yet
// Just ignore, and retry later.
}
if (wait) {
nap();
} else {
return pathLookup.size() > beforeSize;
}
}
return !closed;
}
public Path nextPath(long startTimeNanos, boolean wait) {
if (closed) {
return null;
}
// Try to get the 'exact' path first
// to avoid skipping files if repository
// is updated while DirectoryStream
// is traversing it
Path path = pathSet.get(startTimeNanos);
if (path != null) {
return path;
}
// Update paths
try {
updatePaths();
} catch (IOException e) {
// ignore
}
// try to get the next file
return path(startTimeNanos, wait);
}
private Path path(long timestamp, boolean wait) {
if (closed) {
return null;
}
while (true) {
SortedMap<Long, Path> after = pathSet.tailMap(timestamp);
if (!after.isEmpty()) {
Path path = after.get(after.firstKey());
if (Logger.shouldLog(LogTag.JFR_SYSTEM_STREAMING, LogLevel.TRACE)) {
Logger.log(LogTag.JFR_SYSTEM_STREAMING, LogLevel.TRACE, "Return path " + path + " for start time nanos " + timestamp);
}
return path;
}
if (!updatePaths(wait)) {
return null; // closed
}
}
}
private void nap() {
try {
synchronized (waitObject) {
waitObject.wait(1000);
}
} catch (InterruptedException e) {
// ignore
}
}
private boolean updatePaths() throws IOException {
boolean foundNew = false;
Path repoPath = repository;
if (allowSubDirectory) {
Path subDirectory = findSubDirectory(repoPath);
if (subDirectory != null) {
repoPath = subDirectory;
}
}
if (repoPath == null) {
// Always get the latest repository if 'jcmd JFR.configure
// repositorypath=...' has been executed
SafePath sf = Repository.getRepository().getRepositoryPath();
if (sf == null) {
return false; // not initialized
}
repoPath = sf.toPath();
}
try (DirectoryStream<Path> dirStream = fileAccess.newDirectoryStream(repoPath)) {
List<Path> added = new ArrayList<>();
Set<Path> current = new HashSet<>();
for (Path p : dirStream) {
if (!pathLookup.containsKey(p)) {
String s = p.toString();
if (s.endsWith(".jfr")) {
added.add(p);
Logger.log(LogTag.JFR_SYSTEM_STREAMING, LogLevel.DEBUG, "New file found: " + p.toAbsolutePath());
}
current.add(p);
}
}
List<Path> removed = new ArrayList<>();
for (Path p : pathLookup.keySet()) {
if (!current.contains(p)) {
removed.add(p);
}
}
for (Path remove : removed) {
Long time = pathLookup.get(remove);
pathSet.remove(time);
pathLookup.remove(remove);
}
Collections.sort(added, (p1, p2) -> p1.compareTo(p2));
for (Path p : added) {
// Only add files that have a complete header
// as the JVM may be in progress writing the file
long size = fileAccess.fileSize(p);
if (size >= ChunkHeader.headerSize()) {
long startNanos = readStartTime(p);
if (startNanos != -1) {
pathSet.put(startNanos, p);
pathLookup.put(p, startNanos);
foundNew = true;
}
}
}
if (allowSubDirectory && foundNew) {
// Found a valid file, possibly in a subdirectory.
// Use the same (sub)directory from now on.
repository = repoPath;
allowSubDirectory = false;
}
return foundNew;
}
}
private Path findSubDirectory(Path repoPath) {
FileTime latestTimestamp = null;
Path latestPath = null;
try (DirectoryStream<Path> dirStream = fileAccess.newDirectoryStream(repoPath)) {
for (Path p : dirStream) {
String filename = p.getFileName().toString();
if (isRepository(filename) && fileAccess.isDirectory(p)) {
FileTime timestamp = getLastModified(p);
if (timestamp != null) {
if (latestPath == null || latestTimestamp.compareTo(timestamp) <= 0) {
latestPath = p;
latestTimestamp = timestamp;
}
}
}
}
} catch (IOException e) {
// Ignore
}
return latestPath;
}
private FileTime getLastModified(Path p) {
try {
return fileAccess.getLastModified(p);
} catch (IOException e) {
return null;
}
}
private static boolean isRepository(String filename) {
if (filename.length() < DIRECTORY_PATTERN.length()) {
return false;
}
for (int i = 0; i < DIRECTORY_PATTERN.length(); i++) {
char expected = DIRECTORY_PATTERN.charAt(i);
char c = filename.charAt(i);
if (expected == 'D' && !Character.isDigit(c)) {
return false;
}
if (expected == '_' && c != '_') {
return false;
}
}
return true;
}
private long readStartTime(Path p) {
try (RecordingInput in = new RecordingInput(p.toFile(), fileAccess, 100)) {
Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Parsing header for chunk start time");
ChunkHeader c = new ChunkHeader(in);
return c.getStartNanos();
} catch (IOException ioe) {
return -1;
}
}
void close() {
synchronized (waitObject) {
this.closed = true;
waitObject.notify();
}
}
public boolean hasFixedPath() {
return repository != null;
}
}
⏎ jdk/jfr/internal/consumer/RepositoryFiles.java
Or download all of them as a single archive file:
File name: jdk.jfr-17.0.5-src.zip File size: 363343 bytes Release date: 2022-09-13 Download
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