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/*
* 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.openjpa.event;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
import java.util.List;
import java.util.Collections;
import org.apache.commons.pool.PoolableObjectFactory;
import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.openjpa.lib.conf.Configurable;
import org.apache.openjpa.lib.log.Log;
import org.apache.openjpa.lib.util.J2DoPrivHelper;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.util.GeneralException;
import org.apache.openjpa.util.InternalException;
import org.apache.openjpa.util.Serialization;
import java.util.concurrent.locks.ReentrantLock;
import serp.util.Strings;
/**
* TCP-based implementation of {@link RemoteCommitProvider} that
* listens for object modifications and propagates those changes to
* other RemoteCommitProviders over TCP sockets.
*
* @author Brian Leair
* @author Patrick Linskey
* @since 0.2.5.0
*/
public class TCPRemoteCommitProvider
extends AbstractRemoteCommitProvider
implements Configurable {
private static final int DEFAULT_PORT = 5636;
private static final Localizer s_loc = Localizer.forPackage
(TCPRemoteCommitProvider.class);
private static long s_idSequence = System.currentTimeMillis();
// A map of listen ports to listeners in this JVM. We might
// want to look into allowing same port, different interface --
// that is not currently possible in a single JVM.
private static final Map s_portListenerMap = new HashMap();
private long _id;
private byte[] _localhost;
private int _port = DEFAULT_PORT;
private int _maxActive = 2;
private int _maxIdle = 2;
private int _recoveryTimeMillis = 15000;
private TCPPortListener _listener;
private BroadcastQueue _broadcastQueue = new BroadcastQueue();
private final List _broadcastThreads = Collections.synchronizedList(
new LinkedList());
private ArrayList _addresses = new ArrayList();
private ReentrantLock _addressesLock;
public TCPRemoteCommitProvider()
throws UnknownHostException {
// obtain a unique ID.
synchronized (TCPRemoteCommitProvider.class) {
_id = s_idSequence++;
}
// cache the local IP address.
_localhost = InetAddress.getLocalHost().getAddress();
_addressesLock = new ReentrantLock();
setNumBroadcastThreads(2);
}
/**
* The port that this provider should listen on.
*/
public int getPort() {
return _port;
}
/**
* The port that this provider should listen on. Set once only.
*/
public void setPort(int port) {
_port = port;
}
/**
* The number of milliseconds to wait before retrying
* to reconnect to a peer after it becomes unreachable.
*/
public void setRecoveryTimeMillis(int recoverytime) {
_recoveryTimeMillis = recoverytime;
}
/**
* The number of milliseconds to wait before retrying
* to reconnect to a peer after it becomes unreachable.
*/
public int getRecoveryTimeMillis() {
return _recoveryTimeMillis;
}
/**
* The maximum number of sockets that this provider can
* simetaneously open to each peer in the cluster.
*/
public void setMaxActive(int maxActive) {
_maxActive = maxActive;
}
/**
* The maximum number of sockets that this provider can
* simetaneously open to each peer in the cluster.
*/
public int getMaxActive() {
return _maxActive;
}
/**
* The number of idle sockets that this provider can keep open
* to each peer in the cluster.
*/
public void setMaxIdle(int maxIdle) {
_maxIdle = maxIdle;
}
/**
* The number of idle sockets that this provider can keep open
* to each peer in the cluster.
*/
public int getMaxIdle() {
return _maxIdle;
}
/**
* The number of worker threads that are used for
* transmitting packets to peers in the cluster.
*/
public void setNumBroadcastThreads(int numBroadcastThreads) {
synchronized (_broadcastThreads) {
int cur = _broadcastThreads.size();
if (cur > numBroadcastThreads) {
// Notify the extra worker threads so they stop themselves
// Threads will not end until they send another pk.
for (int i = numBroadcastThreads; i < cur; i++) {
BroadcastWorkerThread worker = (BroadcastWorkerThread)
_broadcastThreads.remove(0);
worker.setRunning(false);
}
} else if (cur < numBroadcastThreads) {
// Create additional worker threads
for (int i = cur; i < numBroadcastThreads; i++) {
BroadcastWorkerThread wt = new BroadcastWorkerThread();
wt.setDaemon(true);
wt.start();
_broadcastThreads.add(wt);
}
}
}
}
/**
* The number of worker threads that are used for
* transmitting packets to peers in the cluster.
*/
public int getNumBroadcastThreads() {
return _broadcastThreads.size();
}
/**
* Sets the list of addresses of peers to which this provider will
* send events to. The peers are semicolon-separated names
* list in the form of "myhost1:portA;myhost2:portB".
*/
public void setAddresses(String names)
throws UnknownHostException {
// NYI. Could look for equivalence of addresses and avoid
// changing those that didn't change.
_addressesLock.lock();
try {
for (Iterator iter = _addresses.iterator(); iter.hasNext();) {
((HostAddress) iter.next()).close();
}
String[] toks = Strings.split(names, ";", 0);
_addresses = new ArrayList(toks.length);
InetAddress localhost = InetAddress.getLocalHost();
String localhostName = localhost.getHostName();
for (int i = 0; i < toks.length; i++) {
String host = toks[i];
String hostname;
int tmpPort;
int colon = host.indexOf(':');
if (colon != -1) {
hostname = host.substring(0, colon);
tmpPort = Integer.parseInt(host.substring(colon + 1));
} else {
hostname = host;
tmpPort = DEFAULT_PORT;
}
InetAddress tmpAddress = AccessController
.doPrivileged(J2DoPrivHelper.getByNameAction(hostname));
// bleair: For each address we would rather make use of
// the jdk1.4 isLinkLocalAddress () || isLoopbackAddress ().
// (Though in practice on win32 they don't work anyways!)
// Instead we will check hostname. Not perfect, but
// it will match often enough (people will typically
// use the DNS machine names and be cutting/pasting.)
if (localhostName.equals(hostname)) {
// This string matches the hostname for for ourselves, we
// don't actually need to send ourselves messages.
if (log.isTraceEnabled()) {
log.trace(s_loc.get("tcp-address-asself",
tmpAddress.getHostName() + ":" + tmpPort));
}
} else {
HostAddress newAddress = new HostAddress(host);
_addresses.add(newAddress);
if (log.isTraceEnabled()) {
log.trace(s_loc.get("tcp-address-set",
newAddress._address.getHostName() + ":"
+ newAddress._port));
}
}
}
} catch (PrivilegedActionException pae) {
throw (UnknownHostException) pae.getException();
} finally {
_addressesLock.unlock();
}
}
// ---------- Configurable implementation ----------
/**
* Subclasses that need to perform actions in
* {@link Configurable#endConfiguration} must invoke this method.
*/
public void endConfiguration() {
super.endConfiguration();
synchronized (s_portListenerMap) {
// see if a listener exists for this port.
_listener = (TCPPortListener) s_portListenerMap.get
(String.valueOf(_port));
if (_listener == null ||
(!_listener.isRunning() && _listener._port == _port)) {
try {
_listener = new TCPPortListener(_port, log);
_listener.listen();
s_portListenerMap.put(String.valueOf(_port), _listener);
} catch (Exception e) {
throw new GeneralException(s_loc.get("tcp-init-exception",
String.valueOf(_port)), e).setFatal(true);
}
} else if (_listener.isRunning()) {
if (_listener._port != _port) {
// this really shouldn't be able to happen.
throw new GeneralException(s_loc.get
("tcp-not-equal", String.valueOf(_port))).
setFatal(true);
}
} else
throw new InternalException(s_loc.get("tcp-listener-broken"));
_listener.addProvider(this);
}
_addressesLock.lock();
try {
HostAddress curAddress;
for (Iterator iter = _addresses.iterator();
iter.hasNext();) {
curAddress = (HostAddress) iter.next();
curAddress.setMaxActive(_maxActive);
curAddress.setMaxIdle(_maxIdle);
}
}
finally {
_addressesLock.unlock();
}
}
// ---------- RemoteCommitProvider implementation ----------
// pre 3.3.4 =
// 3.3 Preview = 0x1428acfd;
// 3.4 = 0x1428acff;
private static final long PROTOCOL_VERSION = 0x1428acff;
public void broadcast(RemoteCommitEvent event) {
try {
// build a packet notifying other JVMs of object changes.
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeLong(PROTOCOL_VERSION);
oos.writeLong(_id);
oos.writeInt(_port);
oos.writeObject(_localhost);
oos.writeObject(event);
oos.flush();
byte[] bytes = baos.toByteArray();
baos.close();
if (_broadcastThreads.isEmpty())
sendUpdatePacket(bytes);
else
_broadcastQueue.addPacket(bytes);
} catch (IOException ioe) {
if (log.isWarnEnabled())
log.warn(s_loc.get("tcp-payload-create-error"), ioe);
}
}
/**
* Sends a change notification packet to other machines in this
* provider cluster.
*/
private void sendUpdatePacket(byte[] bytes) {
_addressesLock.lock();
try {
for (Iterator iter = _addresses.iterator(); iter.hasNext();)
((HostAddress) iter.next()).sendUpdatePacket(bytes);
} finally {
_addressesLock.unlock();
}
}
public void close() {
if (_listener != null)
_listener.removeProvider(this);
// Remove Broadcast Threads then close sockets.
_broadcastQueue.close();
// Wait for _broadcastThreads to get cleaned up.
while(!_broadcastThreads.isEmpty()) {
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
// Ignore.
}
}
_addressesLock.lock();
try {
for (Iterator iter = _addresses.iterator(); iter.hasNext();)
((HostAddress) iter.next()).close();
} finally {
_addressesLock.unlock();
}
}
/**
* Utility class to hold messages to be sent. This
* allows calls to broadcast () to return without
* waiting for the send to complete.
*/
private static class BroadcastQueue {
private LinkedList _packetQueue = new LinkedList();
private boolean _closed = false;
public synchronized void close() {
_closed = true;
notifyAll();
}
public synchronized boolean isClosed() {
return _closed;
}
public synchronized void addPacket(byte[] bytes) {
_packetQueue.addLast(bytes);
notify();
}
/**
* @return the bytes defining the packet to process, or
* null if the queue is empty.
*/
public synchronized byte[] removePacket()
throws InterruptedException {
// only wait if the queue is still open. This allows processing
// of events in the queue to continue, while avoiding sleeping
// during shutdown.
while (!_closed && _packetQueue.isEmpty())
wait();
if (_packetQueue.isEmpty())
return null;
else
return (byte[]) _packetQueue.removeFirst();
}
}
/**
* Threads to broadcast packets placed in the {@link BroadcastQueue}.
*/
private class BroadcastWorkerThread
extends Thread {
private boolean _keepRunning = true;
public void run() {
while (_keepRunning) {
try {
// This will block until there is a packet to send, or
// until the queue is closed.
byte[] bytes = _broadcastQueue.removePacket();
if (bytes != null)
sendUpdatePacket(bytes);
else if (_broadcastQueue.isClosed())
_keepRunning = false;
} catch (InterruptedException e) {
// End the thread.
break;
}
}
remove();
}
public void setRunning(boolean keepRunning) {
_keepRunning = keepRunning;
}
private void remove() {
_broadcastThreads.remove(this);
}
}
/**
* Responsible for listening for incoming packets and processing them.
*/
private static class TCPPortListener
implements Runnable {
private final Log _log;
private ServerSocket _receiveSocket;
private Thread _acceptThread;
private Set _receiverThreads = new HashSet();
private final Set _providers = new HashSet();
/**
* Cache the local IP address
*/
private byte[] _localhost;
/**
* The port that this listener should listen on. Configured
* by TCPRemoteCommitProvider.
*/
private int _port;
/**
* Should be set to true once the listener is listening.
*/
private boolean _isRunning = false;
/**
* Construct a new TCPPortListener configured to use the specified port.
*/
private TCPPortListener(int port, Log log)
throws IOException {
_port = port;
_log = log;
try {
_receiveSocket = AccessController
.doPrivileged(J2DoPrivHelper.newServerSocketAction(_port));
} catch (PrivilegedActionException pae) {
throw (IOException) pae.getException();
}
_localhost = InetAddress.getLocalHost().getAddress();
if (_log.isTraceEnabled())
_log.info(s_loc.get("tcp-start-listener",
String.valueOf(_port)));
}
private void listen() {
_acceptThread = new Thread(this);
_acceptThread.setDaemon(true);
_acceptThread.start();
}
/**
* All providers added here will be notified of any incoming
* provider messages. There will be one of these per
* BrokerFactory in a given JVM.
* {@link TCPRemoteCommitProvider#endConfiguration} invokes
* addProvider with this upon
* completion of configuration.
*/
private void addProvider(TCPRemoteCommitProvider provider) {
synchronized (_providers) {
_providers.add(provider);
}
}
/**
* Remove a provider from the list of providers to notify of
* commit events.
*/
private synchronized void removeProvider
(TCPRemoteCommitProvider provider) {
synchronized (_providers) {
_providers.remove(provider);
// if the provider list is empty, shut down the thread.
if (_providers.size() == 0) {
_isRunning = false;
try {
_receiveSocket.close();
} catch (IOException ioe) {
if (_log.isWarnEnabled())
_log.warn(s_loc.get("tcp-close-error"), ioe);
}
_acceptThread.interrupt();
}
}
}
private boolean isRunning() {
synchronized (_providers) {
return _isRunning;
}
}
public void run() {
synchronized (_providers) {
_isRunning = true;
}
Socket s = null;
while (_isRunning) {
try {
s = null;
// Block, waiting to accept new connection from a peer
s = AccessController.doPrivileged(J2DoPrivHelper
.acceptAction(_receiveSocket));
if (_log.isTraceEnabled()) {
_log.trace(s_loc.get("tcp-received-connection",
s.getInetAddress().getHostAddress()
+ ":" + s.getPort()));
}
ReceiveSocketHandler sh = new ReceiveSocketHandler(s);
Thread receiverThread = new Thread(sh);
receiverThread.setDaemon(true);
receiverThread.start();
_receiverThreads.add(receiverThread);
} catch (Exception e) {
if (e instanceof PrivilegedActionException)
e = ((PrivilegedActionException) e).getException();
if (!(e instanceof SocketException) || _isRunning)
if (_log.isWarnEnabled())
_log.warn(s_loc.get("tcp-accept-error"), e);
// Nominal case (InterruptedException) because close ()
// calls _acceptThread.interrupt ();
try {
if (s != null)
s.close();
} catch (Exception ee) {
if (_log.isWarnEnabled())
_log.warn(s_loc.get("tcp-close-error"), e);
}
}
}
// We are done listening. Interrupt any worker threads.
Thread worker;
for (Iterator iter = _receiverThreads.iterator();
iter.hasNext();) {
worker = (Thread) iter.next();
// FYI, the worker threads are blocked
// reading from the socket's InputStream. InputStreams
// aren't interruptable, so this interrupt isn't
// really going to be delivered until something breaks
// the InputStream.
worker.interrupt();
}
synchronized (_providers) {
try {
if (_isRunning)
_receiveSocket.close();
} catch (Exception e) {
if (_log.isWarnEnabled())
_log.warn(s_loc.get("tcp-close-error"), e);
}
_isRunning = false;
if (_log.isTraceEnabled())
_log.trace(s_loc.get("tcp-close-listener",
_port + ""));
}
}
/**
* Utility class that acts as a worker thread to receive Events
* from broadcasters.
*/
private class ReceiveSocketHandler
implements Runnable {
private InputStream _in;
private Socket _s;
private ReceiveSocketHandler(Socket s) {
// We are the receiving end and we don't send any messages
// back to the broadcaster. Turn off Nagle's so that
// we will send ack packets without waiting.
_s = s;
try {
_s.setTcpNoDelay(true);
_in = new BufferedInputStream(s.getInputStream());
} catch (IOException ioe) {
if (_log.isInfoEnabled())
_log.info(s_loc.get("tcp-socket-option-error"), ioe);
_s = null;
} catch (Exception e) {
if (_log.isWarnEnabled())
_log.warn(s_loc.get("tcp-receive-error"), e);
_s = null;
}
}
public void run() {
if (_s == null)
return;
while (_isRunning && _s != null) {
try {
// This will block our thread, waiting to read
// the next Event-object-message.
handle(_in);
} catch (EOFException eof) {
// EOFException raised when peer is properly
// closing its end.
if (_log.isTraceEnabled()) {
_log.trace(s_loc.get("tcp-close-socket",
_s.getInetAddress().getHostAddress()
+ ":" + _s.getPort()));
}
break;
} catch (Throwable e) {
if (_log.isWarnEnabled())
_log.warn(s_loc.get("tcp-receive-error"), e);
break;
}
}
// We are done receiving on this socket and this worker
// thread is terminating.
try {
_in.close();
if (_s != null)
_s.close();
} catch (IOException e) {
_log.warn(s_loc.get("tcp-close-socket-error",
_s.getInetAddress().getHostAddress() + ":"
+ _s.getPort()), e);
}
}
/**
* Process an {@link InputStream} containing objects written
* by {@link TCPRemoteCommitProvider#broadcast(RemoteCommitEvent)}.
*/
private void handle(InputStream in)
throws IOException, ClassNotFoundException {
// This will block waiting for the next
ObjectInputStream ois =
new Serialization.ClassResolvingObjectInputStream(in);
long protocolVersion = ois.readLong();
if (protocolVersion != PROTOCOL_VERSION) {
if (_log.isWarnEnabled()) {
_log.warn(s_loc.get("tcp-wrong-version-error",
_s.getInetAddress().getHostAddress() + ":"
+ _s.getPort()));
return;
}
}
long senderId = ois.readLong();
int senderPort = ois.readInt();
byte[] senderAddress = (byte[]) ois.readObject();
RemoteCommitEvent rce = (RemoteCommitEvent) ois.readObject();
if (_log.isTraceEnabled()) {
_log.trace(s_loc.get("tcp-received-event",
_s.getInetAddress().getHostAddress() + ":"
+ _s.getPort()));
}
boolean fromSelf = senderPort == _port &&
Arrays.equals(senderAddress, _localhost);
TCPRemoteCommitProvider provider;
synchronized (_providers) {
// bleair: We're iterating, but currenlty there can really
// only be a single provider.
for (Iterator iter = _providers.iterator();
iter.hasNext();) {
provider = (TCPRemoteCommitProvider) iter.next();
if (senderId != provider._id || !fromSelf)
provider.eventManager.fireEvent(rce);
}
}
}
}
}
/**
* Utility class to store an InetAddress and an int. Not using
* InetSocketAddress because it's a JDK1.4 API. This also
* provides a wrapper around the socket(s) associated with this address.
*/
private class HostAddress {
private InetAddress _address;
private int _port;
private long _timeLastError; // millis
private boolean _isAvailable; // is peer thought to be up
private int _infosIssued = 0; // limit log entries
private GenericObjectPool _socketPool; // reusable open sockets
/**
* Construct a new host address from a string of the form
* "host:port" or of the form "host".
*/
private HostAddress(String host)
throws UnknownHostException {
int colon = host.indexOf(':');
try {
if (colon != -1) {
_address = AccessController
.doPrivileged(J2DoPrivHelper.getByNameAction(host
.substring(0, colon)));
_port = Integer.parseInt(host.substring(colon + 1));
} else {
_address = AccessController
.doPrivileged(J2DoPrivHelper.getByNameAction(host));
_port = DEFAULT_PORT;
}
} catch (PrivilegedActionException pae) {
throw (UnknownHostException) pae.getException();
}
// -1 max wait == as long as it takes
_socketPool = new GenericObjectPool
(new SocketPoolableObjectFactory(), _maxActive,
GenericObjectPool.WHEN_EXHAUSTED_BLOCK, -1);
_isAvailable = true;
}
private void setMaxActive(int maxActive) {
_socketPool.setMaxActive(maxActive);
}
private void setMaxIdle(int maxIdle) {
_socketPool.setMaxIdle(maxIdle);
}
public void close() {
// Close the pool of sockets to this peer. This
// will close all sockets in the pool.
try {
_socketPool.close();
} catch (Exception e) {
if (log.isWarnEnabled()) {
log.warn(s_loc.get("tcp-close-pool-error"), e);
}
}
}
private void sendUpdatePacket(byte[] bytes) {
if (!_isAvailable) {
long now = System.currentTimeMillis();
if (now - _timeLastError < _recoveryTimeMillis)
// Not enough time has passed since the last error
return;
}
Socket s = null;
try {
s = getSocket();
OutputStream os = s.getOutputStream();
os.write(bytes);
os.flush();
if (log.isTraceEnabled()) {
log.trace(s_loc.get("tcp-sent-update",
_address.getHostAddress() + ":" + _port,
String.valueOf(s.getLocalPort())));
}
_isAvailable = true;
_infosIssued = 0;
// Return the socket to the pool; the socket is
// still good.
returnSocket(s);
} catch (Exception e) {
// There has been a problem sending to the peer.
// The OS socket that was being used is can no longer
// be used.
if (s != null)
this.closeSocket(s);
this.clearAllSockets();
if (_isAvailable) {
// Log a warning, the peer was up and has now gone down
if (log.isWarnEnabled()) {
log.warn(s_loc.get("tcp-send-error",
_address.getHostAddress() + ":" + _port), e);
}
_isAvailable = false;
// Once enough time has passed we will log another warning
_timeLastError = System.currentTimeMillis();
} else {
long now = System.currentTimeMillis();
if (now - _timeLastError > _recoveryTimeMillis) {
if (_infosIssued < 5) {
// Enough time has passed, and peer is still down
_timeLastError = System.currentTimeMillis();
// We were trying to reestablish the connection,
// but we failed again. Log a message, but
// lower severity. This log will occur periodically
// for 5 times until the peer comes back.
if (log.isInfoEnabled()) {
log.info(s_loc.get("tcp-send-still-error",
_address.getHostAddress() + ":"
+ _port), e);
}
_infosIssued++;
}
}
}
}
}
private Socket getSocket()
throws Exception {
return (Socket) _socketPool.borrowObject();
}
private void returnSocket(Socket s)
throws Exception {
_socketPool.returnObject(s);
}
private void clearAllSockets() {
_socketPool.clear();
}
private void closeSocket(Socket s) {
// All sockets come from the pool.
// This socket is no longer usable, so delete it from the
// pool.
try {
_socketPool.invalidateObject(s);
} catch (Exception e) {
}
}
/**
* Factory for pooled sockets.
*/
private class SocketPoolableObjectFactory
implements PoolableObjectFactory {
public Object makeObject()
throws IOException {
try {
Socket s = AccessController
.doPrivileged(J2DoPrivHelper.newSocketAction(_address,
_port));
if (log.isTraceEnabled()) {
log.trace(s_loc.get("tcp-open-connection", _address
+ ":" + _port, "" + s.getLocalPort()));
}
return s;
} catch (PrivilegedActionException pae) {
throw (IOException) pae.getException();
}
}
public void destroyObject(Object obj) {
// silentClose ().
try {
Socket s = (Socket) obj;
if (log.isTraceEnabled())
log.trace(s_loc.get("tcp-close-sending-socket",
_address + ":" + _port, "" + s.getLocalPort()));
s.close();
} catch (Exception e) {
log.warn(s_loc.get("tcp-close-socket-error",
_address.getHostAddress() + ":" + _port), e);
}
}
public boolean validateObject(Object obj) {
return true;
}
public void activateObject (Object value)
{
}
public void passivateObject (Object value)
{
}
}
}
}
