Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.jni.socket;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.tomcat.jni.Address;
import org.apache.tomcat.jni.Error;
import org.apache.tomcat.jni.Library;
import org.apache.tomcat.jni.OS;
import org.apache.tomcat.jni.Poll;
import org.apache.tomcat.jni.Pool;
import org.apache.tomcat.jni.SSL;
import org.apache.tomcat.jni.SSLContext;
import org.apache.tomcat.jni.SSLExt;
import org.apache.tomcat.jni.Socket;
import org.apache.tomcat.jni.Status;
public class AprSocketContext {
/**
* Called when a chunk of data is sent or received. This is very low
* level, used mostly for debugging or stats.
*/
public static interface RawDataHandler {
public void rawData(AprSocket ch, boolean input, byte[] data, int pos,
int len, int requested, boolean closed);
}
/**
* Called in SSL mode after the handshake is completed.
*
* @see AprSocketContext#customVerification(TlsCertVerifier)
*/
public static interface TlsCertVerifier {
public void handshakeDone(AprSocket ch);
}
/**
* Delegates loading of persistent info about a host - public certs,
* tickets, config, persistent info etc.
*/
public static interface HostInfoLoader {
public HostInfo getHostInfo(String name, int port, boolean ssl);
}
private static final Logger log = Logger.getLogger("AprSocketCtx");
// If interrupt() or thread-safe poll update are not supported - the
// poll updates will happen after the poll() timeout.
// The poll timeout with interrupt/thread safe updates can be much higher/
private static final int FALLBACK_POLL_TIME = 2000;
// It seems to send the ticket, get server helo / ChangeCipherSpec, but than
// SSL3_GET_RECORD:decryption failed or bad record mac in s3_pkt.c:480:
// Either bug in openssl, or some combination of ciphers - needs more debugging.
// ( this can save a roundtrip and CPU on TLS handshake )
boolean USE_TICKETS = false;
private final AprSocket END = new AprSocket(this);
private static final AtomicInteger contextNumber = new AtomicInteger();
private int contextId;
private final AtomicInteger threadNumber = new AtomicInteger();
/**
* For now - single acceptor thread per connector.
*/
private AcceptorThread acceptor;
private AcceptorDispatchThread acceptorDispatch;
// APR/JNI is thread safe
private boolean threadSafe = true;
/**
* Pollers.
*/
private final List pollers = new ArrayList<>();
// Set on all accepted or connected sockets.
// TODO: add the other properties
boolean tcpNoDelay = true;
protected boolean running = true;
protected boolean sslMode;
// onSocket() will be called in accept thread.
// If false: use executor ( but that may choke the acceptor thread )
private boolean nonBlockingAccept = false;
private final BlockingQueue acceptedQueue =
new LinkedBlockingQueue<>();
/**
* Root APR memory pool.
*/
private long rootPool = 0;
/**
* SSL context.
*/
private volatile long sslCtx = 0;
TlsCertVerifier tlsCertVerifier;
//
final int connectTimeout = 20000;
final int defaultTimeout = 100000;
// TODO: Use this
final int keepAliveTimeout = 20000;
final AtomicInteger open = new AtomicInteger();
/**
* Poll interval, in microseconds. If the platform doesn't support
* poll interrupt - it'll take this time to stop the poller.
*
*/
private int pollTime = 5 * 1000000;
private HostInfoLoader hostInfoLoader;
final RawDataHandler rawDataHandler = null;
// TODO: do we need this here ?
private final Map hosts = new HashMap<>();
private String certFile;
private String keyFile;
private byte[] spdyNPN;
private byte[] ticketKey;
// For resolving DNS ( i.e. connect ), callbacks
private ExecutorService threadPool;
// Separate executor for connect/handshakes
final ExecutorService connectExecutor;
final boolean debugSSL = false;
private boolean debugPoll = false;
private boolean deferAccept = false;
private int backlog = 100;
private boolean useSendfile;
private int sslProtocol = SSL.SSL_PROTOCOL_TLSV1 | SSL.SSL_PROTOCOL_TLSV1_1 | SSL.SSL_PROTOCOL_TLSV1_2;
/**
* Max time spent in a callback ( will be longer for blocking )
*/
final AtomicLong maxHandlerTime = new AtomicLong();
final AtomicLong totalHandlerTime = new AtomicLong();
final AtomicLong handlerCount = new AtomicLong();
/**
* Total connections handled ( accepted or connected ).
*/
private final AtomicInteger connectionsCount = new AtomicInteger();
public AprSocketContext() {
connectExecutor =new ThreadPoolExecutor(0, 64, 5, TimeUnit.SECONDS,
new LinkedBlockingQueue(), new RejectedExecutionHandler() {
@Override
public void rejectedExecution(Runnable r,
java.util.concurrent.ThreadPoolExecutor executor) {
AprSocket s = (AprSocket) r;
log.severe("Rejecting " + s);
s.reset();
}
});
contextId = contextNumber.incrementAndGet();
}
/**
* Poller thread count.
*/
private int pollerThreadCount = 4;
public void setPollerThreadCount(int pollerThreadCount) { this.pollerThreadCount = pollerThreadCount; }
public int getPollerThreadCount() { return pollerThreadCount; }
// to test the limits - default should be lower
private int maxConnections = 64 * 1024;
public void setMaxconnections(int maxCon) {
this.maxConnections = maxCon;
}
public void setBacklog(int backlog) { if (backlog > 0) this.backlog = backlog; }
public int getBacklog() { return backlog; }
/**
* Defer accept.
*/
public void setDeferAccept(boolean deferAccept) { this.deferAccept = deferAccept; }
public boolean getDeferAccept() { return deferAccept; }
/**
* For client:
* - ClientHello will include the npn extension ( the ID == 0x3374)
* - if ServerHello includes a list of protocols - select one
* - send it after ChangeCipherSpec and before Finish
*
* For server:
* - if ClientHello includes the npn extension
* -- will send this string as list of supported protocols in ServerHello
* - read the selection before Finish.
* @param npn
*/
public void setNpn(String npn) {
byte[] data = npn.getBytes();
byte[] npnB = new byte[data.length + 2];
System.arraycopy(data, 0, npnB, 1, data.length);
npnB[0] = (byte) data.length;
npnB[npnB.length - 1] = 0;
spdyNPN = npnB;
}
public void setNpn(byte[] data) {
spdyNPN = data;
}
public void setHostLoader(HostInfoLoader handler) {
this.hostInfoLoader = handler;
}
public boolean isServer() {
return acceptor != null;
}
protected Executor getExecutor() {
if (threadPool == null) {
threadPool = Executors.newCachedThreadPool(new ThreadFactory( ) {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r, "AprThread-" + contextId + "-" +
threadNumber.incrementAndGet());
t.setDaemon(true);
return t;
}
});
}
return threadPool;
}
/**
* All accepted/connected sockets will start handshake automatically.
*/
public AprSocketContext setTls() {
this.sslMode = true;
return this;
}
public void setTcpNoDelay(boolean b) {
tcpNoDelay = b;
}
public void setSslProtocol(String protocol) {
protocol = protocol.trim();
if ("SSLv2".equalsIgnoreCase(protocol)) {
sslProtocol = SSL.SSL_PROTOCOL_SSLV2;
} else if ("SSLv3".equalsIgnoreCase(protocol)) {
sslProtocol = SSL.SSL_PROTOCOL_SSLV3;
} else if ("TLSv1".equalsIgnoreCase(protocol)) {
sslProtocol = SSL.SSL_PROTOCOL_TLSV1;
} else if ("TLSv1.1".equalsIgnoreCase(protocol)) {
sslProtocol = SSL.SSL_PROTOCOL_TLSV1_1;
} else if ("TLSv1.2".equalsIgnoreCase(protocol)) {
sslProtocol = SSL.SSL_PROTOCOL_TLSV1_2;
} else if ("all".equalsIgnoreCase(protocol)) {
sslProtocol = SSL.SSL_PROTOCOL_ALL;
}
}
public void setTicketKey(byte[] key48Bytes) {
if(key48Bytes.length != 48) {
throw new RuntimeException("Key must be 48 bytes");
}
this.ticketKey = key48Bytes;
}
public void customVerification(TlsCertVerifier verifier) {
tlsCertVerifier = verifier;
}
// TODO: should have a separate method for switching to tls later.
/**
* Set certificate, will also enable TLS mode.
*/
public AprSocketContext setKeys(String certPemFile, String keyDerFile) {
this.sslMode = true;
setTls();
certFile = certPemFile;
keyFile = keyDerFile;
return this;
}
/**
* SSL cipher suite.
*/
private String SSLCipherSuite = "ALL";
public String getSSLCipherSuite() { return SSLCipherSuite; }
public void setSSLCipherSuite(String SSLCipherSuite) { this.SSLCipherSuite = SSLCipherSuite; }
/**
* Override or use hostInfoLoader to implement persistent/memcache storage.
*/
public HostInfo getHostInfo(String host, int port, boolean ssl) {
if (hostInfoLoader != null) {
return hostInfoLoader.getHostInfo(host, port, ssl);
}
// Use local cache
String key = host + ":" + port;
HostInfo pi = hosts.get(key);
if (pi != null) {
return pi;
}
pi = new HostInfo(host, port, ssl);
hosts.put(key, pi);
return pi;
}
protected void rawData(AprSocket ch, boolean inp, byte[] data, int pos,
int len, int requested, boolean closed) {
if (rawDataHandler != null) {
rawDataHandler.rawData(ch, inp, data, pos, len, requested, closed);
}
}
public void listen(final int port) throws IOException {
if (acceptor != null) {
throw new IOException("Already accepting on " + acceptor.port);
}
if (sslMode && certFile == null) {
throw new IOException("Missing certificates for server");
}
if (sslMode || !nonBlockingAccept) {
acceptorDispatch = new AcceptorDispatchThread();
acceptorDispatch.setName("AprAcceptorDispatch-" + port);
acceptorDispatch.start();
}
acceptor = new AcceptorThread(port);
acceptor.prepare();
acceptor.setName("AprAcceptor-" + port);
acceptor.start();
}
/**
* Get a socket for connectiong to host:port.
*/
public AprSocket socket(String host, int port, boolean ssl) {
HostInfo hi = getHostInfo(host, port, ssl);
return socket(hi);
}
public AprSocket socket(HostInfo hi) {
AprSocket sock = newSocket(this);
sock.setHost(hi);
return sock;
}
public AprSocket socket(long socket) {
AprSocket sock = newSocket(this);
// Tomcat doesn't set this
SSLExt.sslSetMode(socket, SSLExt.SSL_MODE_ENABLE_PARTIAL_WRITE |
SSLExt.SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
sock.setStatus(AprSocket.ACCEPTED);
sock.socket = socket;
return sock;
}
void destroySocket(AprSocket socket) {
// TODO: does it need to be done in io thread ?
synchronized (socket) {
if (socket.socket != 0) {
long s = socket.socket;
socket.socket = 0;
log.info("DESTROY: " + Long.toHexString(s));
Socket.destroy(s);
}
}
}
protected void connectBlocking(AprSocket apr) throws IOException {
try {
if (!running) {
throw new IOException("Stopped");
}
HostInfo hi = apr.getHost();
long clientSockP;
synchronized (pollers) {
long socketpool = Pool.create(getRootPool());
int family = Socket.APR_INET;
clientSockP = Socket.create(family,
Socket.SOCK_STREAM,
Socket.APR_PROTO_TCP, socketpool); // or rootPool ?
}
Socket.timeoutSet(clientSockP, connectTimeout * 1000);
if (OS.IS_UNIX) {
Socket.optSet(clientSockP, Socket.APR_SO_REUSEADDR, 1);
}
Socket.optSet(clientSockP, Socket.APR_SO_KEEPALIVE, 1);
// Blocking
// TODO: use socket pool
// TODO: cache it ( and TTL ) in hi
long inetAddress = Address.info(hi.host, Socket.APR_INET,
hi.port, 0, rootPool);
// this may take a long time - stop/destroy must wait
// at least connect timeout
int rc = Socket.connect(clientSockP, inetAddress);
if (rc != 0) {
synchronized (pollers) {
Socket.close(clientSockP);
Socket.destroy(clientSockP);
}
/////Pool.destroy(socketpool);
throw new IOException("Socket.connect(): " + rc + " " + Error.strerror(rc) + " " + connectTimeout);
}
if (!running) {
throw new IOException("Stopped");
}
connectionsCount.incrementAndGet();
if (tcpNoDelay) {
Socket.optSet(clientSockP, Socket.APR_TCP_NODELAY, 1);
}
Socket.timeoutSet(clientSockP, defaultTimeout * 1000);
apr.socket = clientSockP;
apr.afterConnect();
} catch (IOException e) {
apr.reset();
throw e;
} catch (Throwable e) {
apr.reset();
e.printStackTrace();
throw new IOException(e);
}
}
AprSocket newSocket(AprSocketContext context) {
return new AprSocket(context);
}
/**
* To clean the pools - we could track if all channels are
* closed, but this seems simpler and safer.
*/
@Override
protected void finalize() throws Throwable {
if (rootPool != 0) {
log.warning(this + " GC without stop()");
try {
stop();
} catch (Exception e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
}
super.finalize();
}
public void stop() {
synchronized (pollers) {
if (!running) {
return;
}
running = false;
}
if (rootPool != 0) {
if (acceptor != null) {
try {
acceptor.unblock();
acceptor.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if (acceptorDispatch != null) {
acceptedQueue.add(END);
try {
acceptorDispatch.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if (threadPool != null) {
threadPool.shutdownNow();
}
log.info("Stopping pollers " + contextId);
while (true) {
AprPoller a;
synchronized (pollers) {
if (pollers.size() == 0) {
break;
}
a = pollers.remove(0);
}
a.interruptPoll();
try {
a.join();
log.info("Poller " + a.id + " done ");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
// Called when the last poller has been destroyed.
void destroy() {
synchronized (pollers) {
if (pollers.size() != 0) {
return;
}
if (rootPool == 0) {
return;
}
log.info("Destroy root pool " + rootPool);
//Pool.destroy(rootPool);
//rootPool = 0;
}
}
private static IOException noApr;
static {
try {
Library.initialize(null);
SSL.initialize(null);
} catch (Exception e) {
noApr = new IOException("APR not present", e);
}
}
private long getRootPool() throws IOException {
if (rootPool == 0) {
if (noApr != null) {
throw noApr;
}
// Create the root APR memory pool
rootPool = Pool.create(0);
// Adjust poller sizes
if ((OS.IS_WIN32 || OS.IS_WIN64) && (maxConnections > 1024)) {
// The maximum per poller to get reasonable performance is 1024
pollerThreadCount = maxConnections / 1024;
// Adjust poller size so that it won't reach the limit
maxConnections = maxConnections - (maxConnections % 1024);
}
}
return rootPool;
}
long getSslCtx() throws Exception {
if (sslCtx == 0) {
synchronized (AprSocketContext.class) {
if (sslCtx == 0) {
boolean serverMode = acceptor != null;
sslCtx = SSLContext.make(getRootPool(),
sslProtocol,
serverMode ? SSL.SSL_MODE_SERVER : SSL.SSL_MODE_CLIENT);
// SSL.SSL_OP_NO_SSLv3
int opts = SSL.SSL_OP_NO_SSLv2 |
SSL.SSL_OP_SINGLE_DH_USE;
if (!USE_TICKETS || serverMode && ticketKey == null) {
opts |= SSL.SSL_OP_NO_TICKET;
}
SSLContext.setOptions(sslCtx, opts);
// Set revocation
// SSLContext.setCARevocation(sslContext, SSLCARevocationFile, SSLCARevocationPath);
// Client certificate verification - maybe make it option
try {
SSLContext.setCipherSuite(sslCtx, SSLCipherSuite);
if (serverMode) {
if (ticketKey != null) {
//SSLExt.setTicketKeys(sslCtx, ticketKey, ticketKey.length);
}
if (certFile != null) {
boolean rc = SSLContext.setCertificate(sslCtx,
certFile,
keyFile, null, SSL.SSL_AIDX_DSA);
if (!rc) {
throw new IOException("Can't set keys");
}
}
SSLContext.setVerify(sslCtx, SSL.SSL_CVERIFY_NONE, 10);
if (spdyNPN != null) {
SSLExt.setNPN(sslCtx, spdyNPN, spdyNPN.length);
}
} else {
if (tlsCertVerifier != null) {
// NONE ?
SSLContext.setVerify(sslCtx,
SSL.SSL_CVERIFY_NONE, 10);
} else {
SSLContext.setCACertificate(sslCtx,
"/etc/ssl/certs/ca-certificates.crt",
"/etc/ssl/certs");
SSLContext.setVerify(sslCtx,
SSL.SSL_CVERIFY_REQUIRE, 10);
}
if (spdyNPN != null) {
SSLExt.setNPN(sslCtx, spdyNPN, spdyNPN.length);
}
}
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOException(e);
}
}
// TODO: try release buffers
}
}
return sslCtx;
}
void findPollerAndAdd(AprSocket ch) throws IOException {
if (ch.poller != null) {
ch.poller.requestUpdate(ch);
return;
}
assignPoller(ch);
}
void assignPoller(AprSocket ch) throws IOException {
AprPoller target = null;
synchronized (pollers) {
// Make sure we have min number of pollers
int needPollers = pollerThreadCount - pollers.size();
if (needPollers > 0) {
for (int i = needPollers; i > 0; i--) {
pollers.add(allocatePoller());
}
}
int max = 0;
for (AprPoller poller: pollers) {
int rem = poller.remaining();
if (rem > max) {
target = poller;
max = rem;
}
}
}
if (target != null && target.add(ch)) {
return;
}
// can't be added - add a new poller
synchronized (pollers) {
AprPoller poller = allocatePoller();
poller.add(ch);
pollers.add(poller);
}
}
/**
* Called on each accepted socket (for servers) or after connection (client)
* after handshake.
*/
protected void onSocket(@SuppressWarnings("unused") AprSocket s) {
// Defaults to NO-OP. Parameter is used by sub-classes.
}
private class AcceptorThread extends Thread {
private final int port;
private long serverSockPool = 0;
private long serverSock = 0;
private long inetAddress;
AcceptorThread(int port) {
this.port = port;
setDaemon(true);
}
void prepare() throws IOException {
try {
// Create the pool for the server socket
serverSockPool = Pool.create(getRootPool());
int family = Socket.APR_INET;
inetAddress =
Address.info(null, family, port, 0, serverSockPool);
// Create the APR server socket
serverSock = Socket.create(family,
Socket.SOCK_STREAM,
Socket.APR_PROTO_TCP, serverSockPool);
if (OS.IS_UNIX) {
Socket.optSet(serverSock, Socket.APR_SO_REUSEADDR, 1);
}
// Deal with the firewalls that tend to drop the inactive sockets
Socket.optSet(serverSock, Socket.APR_SO_KEEPALIVE, 1);
// Bind the server socket
int ret = Socket.bind(serverSock, inetAddress);
if (ret != 0) {
throw new IOException("Socket.bind " + ret + " " +
Error.strerror(ret) + " port=" + port);
}
// Start listening on the server socket
ret = Socket.listen(serverSock, backlog );
if (ret != 0) {
throw new IOException("endpoint.init.listen"
+ ret + " " + Error.strerror(ret));
}
if (OS.IS_WIN32 || OS.IS_WIN64) {
// On Windows set the reuseaddr flag after the bind/listen
Socket.optSet(serverSock, Socket.APR_SO_REUSEADDR, 1);
}
// Sendfile usage on systems which don't support it cause major problems
if (useSendfile && !Library.APR_HAS_SENDFILE) {
useSendfile = false;
}
// Delay accepting of new connections until data is available
// Only Linux kernels 2.4 + have that implemented
// on other platforms this call is noop and will return APR_ENOTIMPL.
if (deferAccept) {
if (Socket.optSet(serverSock, Socket.APR_TCP_DEFER_ACCEPT, 1) == Status.APR_ENOTIMPL) {
deferAccept = false;
}
}
} catch (Throwable t) {
throw new IOException(t);
}
}
void unblock() {
try (java.net.Socket sock = new java.net.Socket()) {
// Easiest ( maybe safest ) way to interrupt accept
// we could have it in non-blocking mode, etc
sock.connect(new InetSocketAddress("127.0.0.1", port));
} catch (Exception ex) {
// ignore - the acceptor may have shut down by itself.
}
}
@Override
public void run() {
while (running) {
try {
// each socket has a pool.
final AprSocket ch = newSocket(AprSocketContext.this);
ch.setStatus(AprSocket.ACCEPTED);
ch.socket = Socket.accept(serverSock);
if (!running) {
break;
}
connectionsCount.incrementAndGet();
if (connectionsCount.get() % 1000 == 0) {
System.err.println("Accepted: " + connectionsCount.get());
}
if (nonBlockingAccept && !sslMode) {
ch.setStatus(AprSocket.CONNECTED);
// TODO: SSL really needs a thread.
onSocket(ch);
} else {
acceptedQueue.add(ch);
}
} catch (Throwable e) {
e.printStackTrace();
}
}
Socket.close(serverSock);
}
}
private class AcceptorDispatchThread extends Thread {
AcceptorDispatchThread() {
setDaemon(true);
}
@Override
public void run() {
while(running) {
try {
AprSocket ch = acceptedQueue.take();
if (ch == END) {
return;
}
connectExecutor.execute(ch);
} catch (InterruptedException e) {
}
}
}
}
/**
* Create the poller. With some versions of APR, the maximum poller size will
* be 62 (recompiling APR is necessary to remove this limitation).
* @throws IOException
*/
AprPoller allocatePoller() throws IOException {
long pool = Pool.create(getRootPool());
int size = maxConnections / pollerThreadCount;
long serverPollset = allocatePoller(size, pool);
if (serverPollset == 0 && size > 1024) {
log.severe("Falling back to 1024-sized poll, won't scale");
size = 1024;
serverPollset = allocatePoller(size, pool);
}
if (serverPollset == 0) {
log.severe("Falling back to 62-sized poll, won't scale");
size = 62;
serverPollset = allocatePoller(size, pool);
}
AprPoller res = new AprPoller();
res.pool = pool;
res.serverPollset = serverPollset;
res.desc = new long[size * 2];
res.size = size;
res.id = contextId++;
res.setDaemon(true);
res.setName("AprPoller-" + res.id);
res.start();
if (debugPoll && !sizeLogged) {
sizeLogged = true;
log.info("Poller size " + (res.desc.length / 2));
}
return res;
}
// Removed the 'thread safe' updates for now, to simplify the code
// last test shows a small improvement, can switch later.
private static boolean sizeLogged = false;
protected long allocatePoller(int size, long pool) {
int flag = threadSafe ? Poll.APR_POLLSET_THREADSAFE: 0;
for (int i = 0; i < 2; i++) {
try {
// timeout must be -1 - or ttl will take effect, strange results.
return Poll.create(size, pool, flag, -1);
} catch (Error e) {
e.printStackTrace();
if (Status.APR_STATUS_IS_EINVAL(e.getError())) {
log.info(" endpoint.poll.limitedpollsize " + size);
return 0;
} else if (Status.APR_STATUS_IS_ENOTIMPL(e.getError())) {
// thread safe not supported
log.severe("THREAD SAFE NOT SUPPORTED" + e);
threadSafe = false;
// try again without the flags
continue;
} else {
log.severe("endpoint.poll.initfail" + e);
return 0;
}
}
}
log.severe("Unexpected ENOTIMPL with flag==0");
return 0;
}
class AprPoller extends Thread {
private int id;
private int size;
private long serverPollset = 0;
private long pool = 0;
private long[] desc;
private long lastPoll;
private long lastPollTime;
private final AtomicBoolean inPoll = new AtomicBoolean(false);
// Should be replaced with socket data.
// used only to lookup by socket
private final Map channels = new HashMap<>();
// Active + pending, must be < desc.length / 2
// The channel will also have poller=this when active or pending
// How many sockets have poller == this
private final AtomicInteger keepAliveCount = new AtomicInteger();
// Tracks desc, how many sockets are actively polled
private final AtomicInteger polledCount = new AtomicInteger();
private final AtomicInteger pollCount = new AtomicInteger();
private final List updates = new ArrayList<>();
@Override
public void run() {
if (!running) {
return;
}
if (debugPoll) {
log.info("Starting poller " + id + " " + (isServer() ? "SRV ": "CLI "));
}
long t0 = System.currentTimeMillis();
while (running) {
try {
updates();
// Pool for the specified interval. Remove signaled sockets
synchronized (this) {
inPoll.set(true);
}
// if updates are added after updates and poll - interrupt will have still
// work
int rv = Poll.poll(serverPollset, pollTime, desc, true);
synchronized (this) {
inPoll.set(false);
if (!running) {
break;
}
}
pollCount.incrementAndGet();
lastPoll = System.currentTimeMillis();
lastPollTime = lastPoll - t0;
if (rv > 0) {
if (debugPoll) {
log.info(" Poll() id=" + id + " rv=" + rv + " keepAliveCount=" + keepAliveCount +
" polled = " + polledCount.get()
+ " time=" + lastPollTime);
}
polledCount.addAndGet(-rv);
for (int pollIdx = 0; pollIdx < rv; pollIdx++) {
long sock = desc[pollIdx * 2 + 1];
AprSocket ch;
boolean blocking = false;
synchronized (channels) {
ch = channels.get(Long.valueOf(sock));
if (ch != null) {
blocking = ch.isBlocking();
} else {
log.severe("Polled socket not found !!!!!" + Long.toHexString(sock));
// TODO: destroy/close the raw socket
continue;
}
}
// was removed from polling
ch.clearStatus(AprSocket.POLL);
// We just removed it ( see last param to poll()).
// Check for failed sockets and hand this socket off to a worker
long mask = desc[pollIdx * 2];
boolean err = ((mask & Poll.APR_POLLERR) == Poll.APR_POLLERR);
boolean nval = ((mask & Poll.APR_POLLNVAL) != 0);
if (err || nval) {
System.err.println("ERR " + err + " NVAL " + nval);
}
boolean out = (mask & Poll.APR_POLLOUT) == Poll.APR_POLLOUT;
boolean in = (mask & Poll.APR_POLLIN) == Poll.APR_POLLIN;
if (debugPoll) {
log.info(" Poll channel: " + Long.toHexString(mask) +
(out ? " OUT" :"") +
(in ? " IN": "") +
(err ? " ERR" : "") +
" Ch: " + ch);
}
// will be set again in process(), if all read/write is done
ch.clearStatus(AprSocket.POLLOUT);
ch.clearStatus(AprSocket.POLLIN);
// try to send if needed
if (blocking) {
synchronized (ch) {
ch.notifyAll();
}
getExecutor().execute(ch);
} else {
((AprSocketContext.NonBlockingPollHandler) ch.handler).process(ch, in, out, false);
// Update polling for the channel (in IO thread, safe)
updateIOThread(ch);
}
}
} else if (rv < 0) {
int errn = -rv;
if (errn == Status.TIMEUP) {
// to or interrupt
// if (debugPoll) {
// log.info(" Poll() timeup" + " keepAliveCount=" + keepAliveCount +
// " polled = " + polledCount.get()
// + " time=" + lastPollTime);
// }
} else if (errn == Status.EINTR) {
// interrupt - no need to log
} else {
if (debugPoll) {
log.info(" Poll() rv=" + rv + " keepAliveCount=" + keepAliveCount +
" polled = " + polledCount.get()
+ " time=" + lastPollTime);
}
/* Any non timeup or interrupted error is critical */
if (errn > Status.APR_OS_START_USERERR) {
errn -= Status.APR_OS_START_USERERR;
}
log.severe("endpoint.poll.fail " + errn + " " + Error.strerror(errn));
// Handle poll critical failure
synchronized (this) {
destroyPoller(); // will close all sockets
}
continue;
}
}
// TODO: timeouts
} catch (Throwable t) {
log.log(Level.SEVERE, "endpoint.poll.error", t);
}
}
if (!running) {
destroyPoller();
}
}
/**
* Destroy the poller.
*/
protected void destroyPoller() {
synchronized (pollers) {
pollers.remove(this);
}
log.info("Poller stopped after cnt=" +
pollCount.get() +
" sockets=" + channels.size() +
" lastPoll=" + lastPoll);
// Close all sockets
synchronized (this) {
if (serverPollset == 0) {
return;
}
// for (AprSocket ch: channels.values()) {
// ch.poller = null;
// ch.reset();
// }
keepAliveCount.set(0);
log.warning("Destroy pollset");
//serverPollset = 0;
}
Pool.destroy(pool);
pool = 0;
synchronized (pollers) {
// Now we can destroy the root pool
if (pollers.size() == 0 && !running) {
log.info("Destroy server context");
// AprSocketContext.this.destroy();
}
}
}
/**
* Called only in poller thread, only used if not thread safe
* @throws IOException
*/
protected void updates() throws IOException {
synchronized (this) {
for (AprSocket up: updates) {
updateIOThread(up);
}
updates.clear();
}
}
void interruptPoll() {
try {
int rc = Status.APR_SUCCESS;
synchronized (this) {
if (serverPollset != 0) {
rc = Poll.interrupt(serverPollset);
} else {
log.severe("Interrupt with closed pollset");
}
}
if (rc != Status.APR_SUCCESS) {
log.severe("Failed interrupt and not thread safe");
}
} catch (Throwable t) {
t.printStackTrace();
if (pollTime > FALLBACK_POLL_TIME) {
pollTime = FALLBACK_POLL_TIME;
}
}
}
int remaining() {
synchronized (channels) {
return (desc.length - channels.size() * 2);
}
}
/**
* Called from any thread, return true if we could add it
* to pending.
*/
boolean add(AprSocket ch) throws IOException {
synchronized (this) {
if (!running) {
return false;
}
if (keepAliveCount.get() >= size) {
return false;
}
keepAliveCount.incrementAndGet();
ch.poller = this;
}
requestUpdate(ch);
return true;
}
/**
* May be called outside of IOThread.
*/
protected void requestUpdate(AprSocket ch) throws IOException {
synchronized (this) {
if (!running) {
return;
}
}
if (isPollerThread()) {
updateIOThread(ch);
} else {
synchronized (this) {
if (!updates.contains(ch)) {
updates.add(ch);
}
interruptPoll();
}
if (debugPoll) {
log.info("Poll: requestUpdate " + id + " " + ch);
}
}
}
private void updateIOThread(AprSocket ch) throws IOException {
if (!running || ch.socket == 0) {
return;
}
// called from IO thread, either in 'updates' or after
// poll.
//synchronized (ch)
boolean polling = ch.checkPreConnect(AprSocket.POLL);
int requested = ch.requestedPolling();
if (requested == 0) {
if (polling) {
removeSafe(ch);
}
if (ch.isClosed()) {
synchronized (channels) {
ch.poller = null;
channels.remove(Long.valueOf(ch.socket));
}
keepAliveCount.decrementAndGet();
ch.reset();
}
} else {
if (polling) {
removeSafe(ch);
}
// will close if error
pollAdd(ch, requested);
}
if (debugPoll) {
log.info("Poll: updated=" + id + " " + ch);
}
}
/**
* Called only from IO thread
*/
private void pollAdd(AprSocket up, int req) throws IOException {
boolean failed = false;
int rv;
synchronized (channels) {
if (up.isClosed()) {
return;
}
rv = Poll.add(serverPollset, up.socket, req);
if (rv != Status.APR_SUCCESS) {
up.poller = null;
keepAliveCount.decrementAndGet();
failed = true;
} else {
polledCount.incrementAndGet();
channels.put(Long.valueOf(up.socket), up);
up.setStatus(AprSocket.POLL);
}
}
if (failed) {
up.reset();
throw new IOException("poll add error " + rv + " " + up + " " + Error.strerror(rv));
}
}
/**
* Called only from IO thread. Remove from Poll and channels,
* set POLL bit to false.
*/
private void removeSafe(AprSocket up) {
int rv = Status.APR_EGENERAL;
if (running && serverPollset != 0 && up.socket != 0
&& !up.isClosed()) {
rv = Poll.remove(serverPollset, up.socket);
}
up.clearStatus(AprSocket.POLL);
if (rv != Status.APR_SUCCESS) {
log.severe("poll remove error " + Error.strerror(rv) + " " + up);
} else {
polledCount.decrementAndGet();
}
}
public boolean isPollerThread() {
return Thread.currentThread() == this;
}
}
/**
* Callback for poll events, will be invoked in a thread pool.
*
*/
public static interface BlockingPollHandler {
/**
* Called when the socket has been polled for in, out or closed.
*
*
*/
public void process(AprSocket ch, boolean in, boolean out, boolean close);
/**
* Called just before the socket is destroyed
*/
public void closed(AprSocket ch);
}
/**
* Additional callbacks for non-blocking.
* This can be much faster - but it's harder to code, should be used only
* for low-level protocol implementation, proxies, etc.
*
* The model is restricted in many ways to avoid complexity and bugs:
*
* - read can only happen in the IO thread associated with the poller
* - user doesn't control poll interest - it is set automatically based
* on read/write results
* - it is only possible to suspend read, for TCP flow control - also
* only from the IO thread. Resume can happen from any thread.
* - it is also possible to call write() from any thread
*/
public static interface NonBlockingPollHandler extends BlockingPollHandler {
/**
* Called after connection is established, in a thread pool.
* Process will be called next.
*/
public void connected(AprSocket ch);
/**
* Before close, if an exception happens.
*/
public void error(AprSocket ch, Throwable t);
}
}
