JDK 11 java.base.jmod - Base Module
JDK 11 java.base.jmod is the JMOD file for JDK 11 Base module.
JDK 11 Base module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.base.jmod.
JDK 11 Base module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 Base module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.base.
You can click and view the content of each source code file in the list below.
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⏎ sun/net/www/http/KeepAliveCache.java
/*
* Copyright (c) 1996, 2017, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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package sun.net.www.http;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import jdk.internal.misc.InnocuousThread;
import sun.security.action.GetIntegerAction;
/**
* A class that implements a cache of idle Http connections for keep-alive
*
* @author Stephen R. Pietrowicz (NCSA)
* @author Dave Brown
*/
public class KeepAliveCache
extends HashMap<KeepAliveKey, ClientVector>
implements Runnable {
private static final long serialVersionUID = -2937172892064557949L;
/* maximum # keep-alive connections to maintain at once
* This should be 2 by the HTTP spec, but because we don't support pipe-lining
* a larger value is more appropriate. So we now set a default of 5, and the value
* refers to the number of idle connections per destination (in the cache) only.
* It can be reset by setting system property "http.maxConnections".
*/
static final int MAX_CONNECTIONS = 5;
static int result = -1;
static int getMaxConnections() {
if (result == -1) {
result = AccessController.doPrivileged(
new GetIntegerAction("http.maxConnections", MAX_CONNECTIONS))
.intValue();
if (result <= 0) {
result = MAX_CONNECTIONS;
}
}
return result;
}
static final int LIFETIME = 5000;
private Thread keepAliveTimer = null;
/**
* Constructor
*/
public KeepAliveCache() {}
/**
* Register this URL and HttpClient (that supports keep-alive) with the cache
* @param url The URL contains info about the host and port
* @param http The HttpClient to be cached
*/
public synchronized void put(final URL url, Object obj, HttpClient http) {
boolean startThread = (keepAliveTimer == null);
if (!startThread) {
if (!keepAliveTimer.isAlive()) {
startThread = true;
}
}
if (startThread) {
clear();
/* Unfortunately, we can't always believe the keep-alive timeout we got
* back from the server. If I'm connected through a Netscape proxy
* to a server that sent me a keep-alive
* time of 15 sec, the proxy unilaterally terminates my connection
* The robustness to get around this is in HttpClient.parseHTTP()
*/
final KeepAliveCache cache = this;
AccessController.doPrivileged(new PrivilegedAction<>() {
public Void run() {
keepAliveTimer = InnocuousThread.newSystemThread("Keep-Alive-Timer", cache);
keepAliveTimer.setDaemon(true);
keepAliveTimer.setPriority(Thread.MAX_PRIORITY - 2);
keepAliveTimer.start();
return null;
}
});
}
KeepAliveKey key = new KeepAliveKey(url, obj);
ClientVector v = super.get(key);
if (v == null) {
int keepAliveTimeout = http.getKeepAliveTimeout();
v = new ClientVector(keepAliveTimeout > 0 ?
keepAliveTimeout * 1000 : LIFETIME);
v.put(http);
super.put(key, v);
} else {
v.put(http);
}
}
/* remove an obsolete HttpClient from its VectorCache */
public synchronized void remove(HttpClient h, Object obj) {
KeepAliveKey key = new KeepAliveKey(h.url, obj);
ClientVector v = super.get(key);
if (v != null) {
v.remove(h);
if (v.isEmpty()) {
removeVector(key);
}
}
}
/* called by a clientVector thread when all its connections have timed out
* and that vector of connections should be removed.
*/
synchronized void removeVector(KeepAliveKey k) {
super.remove(k);
}
/**
* Check to see if this URL has a cached HttpClient
*/
public synchronized HttpClient get(URL url, Object obj) {
KeepAliveKey key = new KeepAliveKey(url, obj);
ClientVector v = super.get(key);
if (v == null) { // nothing in cache yet
return null;
}
return v.get();
}
/* Sleeps for an alloted timeout, then checks for timed out connections.
* Errs on the side of caution (leave connections idle for a relatively
* short time).
*/
@Override
public void run() {
do {
try {
Thread.sleep(LIFETIME);
} catch (InterruptedException e) {}
// Remove all outdated HttpClients.
synchronized (this) {
long currentTime = System.currentTimeMillis();
List<KeepAliveKey> keysToRemove = new ArrayList<>();
for (KeepAliveKey key : keySet()) {
ClientVector v = get(key);
synchronized (v) {
KeepAliveEntry e = v.peek();
while (e != null) {
if ((currentTime - e.idleStartTime) > v.nap) {
v.poll();
e.hc.closeServer();
} else {
break;
}
e = v.peek();
}
if (v.isEmpty()) {
keysToRemove.add(key);
}
}
}
for (KeepAliveKey key : keysToRemove) {
removeVector(key);
}
}
} while (!isEmpty());
}
/*
* Do not serialize this class!
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
throw new NotSerializableException();
}
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException
{
throw new NotSerializableException();
}
}
/* FILO order for recycling HttpClients, should run in a thread
* to time them out. If > maxConns are in use, block.
*/
class ClientVector extends ArrayDeque<KeepAliveEntry> {
private static final long serialVersionUID = -8680532108106489459L;
// sleep time in milliseconds, before cache clear
int nap;
ClientVector(int nap) {
this.nap = nap;
}
synchronized HttpClient get() {
if (isEmpty()) {
return null;
}
// Loop until we find a connection that has not timed out
HttpClient hc = null;
long currentTime = System.currentTimeMillis();
do {
KeepAliveEntry e = pop();
if ((currentTime - e.idleStartTime) > nap) {
e.hc.closeServer();
} else {
hc = e.hc;
}
} while ((hc == null) && (!isEmpty()));
return hc;
}
/* return a still valid, unused HttpClient */
synchronized void put(HttpClient h) {
if (size() >= KeepAliveCache.getMaxConnections()) {
h.closeServer(); // otherwise the connection remains in limbo
} else {
push(new KeepAliveEntry(h, System.currentTimeMillis()));
}
}
/* remove an HttpClient */
synchronized boolean remove(HttpClient h) {
for (KeepAliveEntry curr : this) {
if (curr.hc == h) {
return super.remove(curr);
}
}
return false;
}
/*
* Do not serialize this class!
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
throw new NotSerializableException();
}
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException
{
throw new NotSerializableException();
}
}
class KeepAliveKey {
private String protocol = null;
private String host = null;
private int port = 0;
private Object obj = null; // additional key, such as socketfactory
/**
* Constructor
*
* @param url the URL containing the protocol, host and port information
*/
public KeepAliveKey(URL url, Object obj) {
this.protocol = url.getProtocol();
this.host = url.getHost();
this.port = url.getPort();
this.obj = obj;
}
/**
* Determine whether or not two objects of this type are equal
*/
@Override
public boolean equals(Object obj) {
if ((obj instanceof KeepAliveKey) == false)
return false;
KeepAliveKey kae = (KeepAliveKey)obj;
return host.equals(kae.host)
&& (port == kae.port)
&& protocol.equals(kae.protocol)
&& this.obj == kae.obj;
}
/**
* The hashCode() for this object is the string hashCode() of
* concatenation of the protocol, host name and port.
*/
@Override
public int hashCode() {
String str = protocol+host+port;
return this.obj == null? str.hashCode() :
str.hashCode() + this.obj.hashCode();
}
}
class KeepAliveEntry {
HttpClient hc;
long idleStartTime;
KeepAliveEntry(HttpClient hc, long idleStartTime) {
this.hc = hc;
this.idleStartTime = idleStartTime;
}
}
⏎ sun/net/www/http/KeepAliveCache.java
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File name: java.base-11.0.1-src.zip File size: 8740354 bytes Release date: 2018-11-04 Download
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