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The core QuickFIX/J engine
/*******************************************************************************
* Copyright (c) quickfixengine.org All rights reserved.
*
* This file is part of the QuickFIX FIX Engine
*
* This file may be distributed under the terms of the quickfixengine.org
* license as defined by quickfixengine.org and appearing in the file
* LICENSE included in the packaging of this file.
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
* THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* See http://www.quickfixengine.org/LICENSE for licensing information.
*
* Contact [email protected] if any conditions of this licensing
* are not clear to you.
******************************************************************************/
package quickfix.mina;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import org.apache.mina.core.filterchain.IoFilterChainBuilder;
import org.apache.mina.core.session.IoSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import quickfix.ConfigError;
import quickfix.Connector;
import quickfix.FieldConvertError;
import quickfix.Session;
import quickfix.SessionFactory;
import quickfix.SessionID;
import quickfix.SessionSettings;
import quickfix.field.converter.IntConverter;
/**
* An abstract base class for acceptors and initiators. Provides support for common functionality and also serves as an
* abstraction where the code doesn't need to make the acceptor/initiator distinction.
*/
public abstract class SessionConnector implements Connector {
protected static final int DEFAULT_QUEUE_CAPACITY = 10000;
public static final String SESSIONS_PROPERTY = "sessions";
public final static String QF_SESSION = "QF_SESSION";
protected final Logger log = LoggerFactory.getLogger(getClass());
protected final PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);
private Map sessions = Collections.emptyMap();
private final SessionSettings settings;
private final SessionFactory sessionFactory;
private final static ScheduledExecutorService scheduledExecutorService = Executors
.newSingleThreadScheduledExecutor(new QFTimerThreadFactory());
private ScheduledFuture sessionTimerFuture;
private IoFilterChainBuilder ioFilterChainBuilder;
public SessionConnector(SessionSettings settings, SessionFactory sessionFactory) throws ConfigError {
this.settings = settings;
this.sessionFactory = sessionFactory;
if (settings == null) {
throw new ConfigError("no settings");
}
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
propertyChangeSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
propertyChangeSupport.removePropertyChangeListener(listener);
}
protected void setSessions(Map sessions) {
this.sessions = sessions;
propertyChangeSupport.firePropertyChange(SESSIONS_PROPERTY, null, sessions);
}
/**
* Get the list of session managed by this connector.
*
* @return list of quickfix.Session objects
* @see quickfix.Session
*/
public List getManagedSessions() {
return new ArrayList(sessions.values());
}
/**
* This is for subclasses to directly access the session map.
*
* @return a map of sessions keys by session ID
*/
protected Map getSessionMap() {
return Collections.unmodifiableMap(sessions);
}
/**
* Return the list of session identifiers of sessions managed
* by this connector. Should be called getSessionIDs but the
* current name is retained for QF/JNI compatibility.
*
* @return list of session identifiers
*/
public ArrayList getSessions() {
return new ArrayList(sessions.keySet());
}
public void addDynamicSession(Session inSession) {
sessions.put(inSession.getSessionID(), inSession);
log.debug("adding session for " + inSession.getSessionID());
propertyChangeSupport.firePropertyChange(SESSIONS_PROPERTY, null, sessions);
}
public void removeDynamicSession(SessionID inSessionID) {
sessions.remove(inSessionID);
log.debug("removing session for " + inSessionID);
propertyChangeSupport.firePropertyChange(SESSIONS_PROPERTY, null, sessions);
}
public SessionSettings getSettings() {
return settings;
}
protected Session createSession(SessionID sessionID) throws ConfigError {
return sessionFactory.create(sessionID, settings);
}
protected int getIntSetting(String key) throws ConfigError {
try {
return IntConverter.convert(settings.getString(key));
} catch (FieldConvertError e) {
throw (ConfigError) new ConfigError(e.getMessage()).fillInStackTrace();
}
}
/**
* Check if we have at least one session and that all the sessions are logged on
*
* @return false if no session or at least one session is not logged on
*/
public boolean isLoggedOn() {
// if no session, not logged on
if (sessions.isEmpty())
return false;
for (Session session : sessions.values()) {
// at least one session not logged on
if (!session.isLoggedOn())
return false;
}
// all the sessions are logged on
return true;
}
private Set getLoggedOnSessions() {
Set loggedOnSessions = new HashSet(sessions.size());
for (Session session : sessions.values()) {
if (session.isLoggedOn()) {
loggedOnSessions.add(session);
}
}
return loggedOnSessions;
}
protected void logoutAllSessions(boolean forceDisconnect) {
log.info("Logging out all sessions");
if (sessions == null) {
log.error("Attempt to logout all sessions before initialization is complete.");
return;
}
for (Session session : sessions.values()) {
try {
session.logout();
} catch (Throwable e) {
logError(session.getSessionID(), null, "Error during logout", e);
}
}
if (forceDisconnect && isLoggedOn()) {
for (Session session : sessions.values()) {
try {
if (session.isLoggedOn()) {
session.disconnect("Forcibly disconnecting session", false);
}
} catch (Throwable e) {
logError(session.getSessionID(), null, "Error during disconnect", e);
}
}
}
if (!forceDisconnect) {
waitForLogout();
}
}
protected void waitForLogout() {
long start = System.currentTimeMillis();
Set loggedOnSessions;
while (!(loggedOnSessions = getLoggedOnSessions()).isEmpty()) {
try {
Thread.sleep(100L);
} catch (InterruptedException e) {
log.error(e.getMessage(), e);
}
final long elapsed = System.currentTimeMillis() - start;
Iterator sessionItr = loggedOnSessions.iterator();
while (sessionItr.hasNext()) {
Session session = sessionItr.next();
if (elapsed >= session.getLogoutTimeout() * 1000L) {
try {
session.disconnect("Logout timeout, force disconnect", false);
} catch (IOException e) {
log.error(e.getMessage(), e);
}
sessionItr.remove();
}
}
// Be sure we don't look forever
if (elapsed > 60000L) {
log.warn("Stopping session logout wait after 1 minute");
break;
}
}
}
protected void logError(SessionID sessionID, IoSession protocolSession, String message, Throwable t) {
log.error(message + getLogSuffix(sessionID, protocolSession), t);
}
private String getLogSuffix(SessionID sessionID, IoSession protocolSession) {
String suffix = ":";
if (sessionID != null) {
suffix += "sessionID=" + sessionID.toString() + ";";
}
if (protocolSession != null) {
suffix += "address=" + protocolSession.getRemoteAddress();
}
return suffix;
}
protected void startSessionTimer() {
sessionTimerFuture = scheduledExecutorService.scheduleAtFixedRate(new SessionTimerTask(), 0, 1000L,
TimeUnit.MILLISECONDS);
log.info("SessionTimer started");
}
protected void stopSessionTimer() {
if (sessionTimerFuture != null) {
if (sessionTimerFuture.cancel(false))
log.info("SessionTimer canceled");
}
}
protected ScheduledExecutorService getScheduledExecutorService() {
return scheduledExecutorService;
}
private class SessionTimerTask implements Runnable {
public void run() {
try {
for (Session session : sessions.values()) {
try {
session.next();
} catch (IOException e) {
logError(session.getSessionID(), null, "Error in session timer processing", e);
}
}
} catch (Throwable e) {
log.error("Error during timer processing", e);
}
}
}
private static class QFTimerThreadFactory implements ThreadFactory {
public Thread newThread(Runnable runnable) {
Thread thread = new Thread(runnable, "QFJ Timer");
thread.setDaemon(true);
return thread;
}
}
/**
* Allows a custom IOFilterChainBuilder to be added to the session connector. This will allow modification of the
* MINA filter chain. Modifying the filter chain can be useful for logging, encryption/SSL and other purposes. The
* FIX codec filter name can be used to for inserting custom filters before or after the FIX message codec.
*
* @param ioFilterChainBuilder
* @see IoFilterChainBuilder
*/
public void setIoFilterChainBuilder(IoFilterChainBuilder ioFilterChainBuilder) {
this.ioFilterChainBuilder = ioFilterChainBuilder;
}
protected IoFilterChainBuilder getIoFilterChainBuilder() {
return ioFilterChainBuilder;
}
}