Java tutorial
/* * Copyright (c) 2004-2006 Marco Maccaferri and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Marco Maccaferri - initial API and implementation */ package org.eclipsetrader.archipelago; import java.beans.PropertyChangeSupport; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.InetSocketAddress; import java.net.Proxy; import java.net.Socket; import java.net.SocketException; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.eclipse.core.net.proxy.IProxyData; import org.eclipse.core.net.proxy.IProxyService; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IConfigurationElement; import org.eclipse.core.runtime.IExecutableExtension; import org.eclipse.core.runtime.IExecutableExtensionFactory; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.ListenerList; import org.eclipse.core.runtime.Status; import org.eclipsetrader.core.feed.BookEntry; import org.eclipsetrader.core.feed.IBook; import org.eclipsetrader.core.feed.IBookEntry; import org.eclipsetrader.core.feed.IConnectorListener; import org.eclipsetrader.core.feed.IFeedConnector2; import org.eclipsetrader.core.feed.IFeedIdentifier; import org.eclipsetrader.core.feed.IFeedSubscription; import org.eclipsetrader.core.feed.IFeedSubscription2; import org.eclipsetrader.core.feed.QuoteDelta; import org.osgi.framework.BundleContext; import org.osgi.framework.ServiceReference; public class Level2Feed implements IFeedConnector2, Runnable, IExecutableExtension, IExecutableExtensionFactory { private static Level2Feed instance; private String id; private String name; private ListenerList listeners = new ListenerList(ListenerList.IDENTITY); private Map<String, FeedSubscription> symbolSubscriptions; private boolean subscriptionsChanged; private Thread thread; private boolean stopping; private Socket socket; private BufferedOutputStream os; private BufferedReader is; private Log logger = LogFactory.getLog(getClass()); public Level2Feed() { if (instance == null) { symbolSubscriptions = new HashMap<String, FeedSubscription>(); instance = this; } } /* (non-Javadoc) * @see org.eclipse.core.runtime.IExecutableExtension#setInitializationData(org.eclipse.core.runtime.IConfigurationElement, java.lang.String, java.lang.Object) */ @Override public void setInitializationData(IConfigurationElement config, String propertyName, Object data) throws CoreException { id = config.getAttribute("id"); name = config.getAttribute("name"); } /* (non-Javadoc) * @see org.eclipse.core.runtime.IExecutableExtensionFactory#create() */ @Override public Object create() throws CoreException { return instance; } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#getId() */ @Override public String getId() { return id; } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#getName() */ @Override public String getName() { return name; } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#subscribe(org.eclipsetrader.core.feed.IFeedIdentifier) */ @Override public IFeedSubscription subscribe(IFeedIdentifier identifier) { return null; } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector2#subscribeLevel2(org.eclipsetrader.core.feed.IFeedIdentifier) */ @Override public IFeedSubscription2 subscribeLevel2(IFeedIdentifier identifier) { synchronized (symbolSubscriptions) { FeedSubscription subscription = symbolSubscriptions.get(identifier.getSymbol()); if (subscription == null) { subscription = new FeedSubscription(this, identifier); PropertyChangeSupport propertyChangeSupport = (PropertyChangeSupport) identifier .getAdapter(PropertyChangeSupport.class); if (propertyChangeSupport != null) { ; // TODO propertyChangeSupport.addPropertyChangeListener(this); } symbolSubscriptions.put(identifier.getSymbol(), subscription); subscriptionsChanged = true; } if (subscription.getIdentifier() == null) { subscription.setIdentifier(identifier); PropertyChangeSupport propertyChangeSupport = (PropertyChangeSupport) identifier .getAdapter(PropertyChangeSupport.class); if (propertyChangeSupport != null) { ; // TODO propertyChangeSupport.addPropertyChangeListener(this); } } if (subscription.incrementInstanceCount() == 1) { subscriptionsChanged = true; } return subscription; } } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector2#subscribeLevel2(java.lang.String) */ @Override public IFeedSubscription2 subscribeLevel2(String symbol) { synchronized (symbolSubscriptions) { FeedSubscription subscription = symbolSubscriptions.get(symbol); if (subscription == null) { subscription = new FeedSubscription(this, symbol); symbolSubscriptions.put(symbol, subscription); subscriptionsChanged = true; } if (subscription.incrementInstanceCount() == 1) { subscriptionsChanged = true; } return subscription; } } public void disposeSubscription(FeedSubscription subscription) { synchronized (symbolSubscriptions) { if (subscription.decrementInstanceCount() <= 0) { if (subscription.getIdentifier() != null) { PropertyChangeSupport propertyChangeSupport = (PropertyChangeSupport) subscription .getIdentifier().getAdapter(PropertyChangeSupport.class); if (propertyChangeSupport != null) { ; // TODO propertyChangeSupport.removePropertyChangeListener(this); } } symbolSubscriptions.remove(subscription.getSymbol()); subscriptionsChanged = true; } } } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#connect() */ @Override public void connect() { if (thread == null) { stopping = false; thread = new Thread(this); thread.start(); } } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#disconnect() */ @Override public void disconnect() { stopping = true; if (thread != null) { try { thread.join(30 * 1000); } catch (InterruptedException e) { e.printStackTrace(); } thread = null; } } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#addConnectorListener(org.eclipsetrader.core.feed.IConnectorListener) */ @Override public void addConnectorListener(IConnectorListener listener) { listeners.add(listener); } /* (non-Javadoc) * @see org.eclipsetrader.core.feed.IFeedConnector#removeConnectorListener(org.eclipsetrader.core.feed.IConnectorListener) */ @Override public void removeConnectorListener(IConnectorListener listener) { listeners.remove(listener); } /* (non-Javadoc) * @see java.lang.Runnable#run() */ @Override public void run() { String HOST = "datasvr.tradearca.com"; Set<String> sTit = new HashSet<String>(); for (int i = 0; i < 5 && !stopping; i++) { try { Proxy socksProxy = Proxy.NO_PROXY; if (ArchipelagoPlugin.getDefault() != null) { BundleContext context = ArchipelagoPlugin.getDefault().getBundle().getBundleContext(); ServiceReference reference = context.getServiceReference(IProxyService.class.getName()); if (reference != null) { IProxyService proxy = (IProxyService) context.getService(reference); IProxyData data = proxy.getProxyDataForHost(HOST, IProxyData.SOCKS_PROXY_TYPE); if (data != null) { if (data.getHost() != null) { socksProxy = new Proxy(Proxy.Type.SOCKS, new InetSocketAddress(data.getHost(), data.getPort())); } } context.ungetService(reference); } } socket = new Socket(socksProxy); socket.connect(new InetSocketAddress(HOST, 80)); os = new BufferedOutputStream(socket.getOutputStream()); is = new BufferedReader(new InputStreamReader(socket.getInputStream())); os.write("GET http://datasvr.tradearca.com/zrepeaterz/ HTTP/1.1\r\n\r\n".getBytes()); os.write("LogonRequest=DISABLED\r\n".getBytes()); os.flush(); break; } catch (Exception e) { Status status = new Status(IStatus.ERROR, ArchipelagoPlugin.PLUGIN_ID, 0, "Error connecting to server", e); ArchipelagoPlugin.log(status); try { if (socket != null) { socket.close(); } } catch (Exception e1) { } socket = null; is = null; os = null; } } if (socket == null || os == null || is == null) { thread = null; return; } while (!stopping) { try { if (subscriptionsChanged) { Set<String> toAdd = new HashSet<String>(); Set<String> toRemove = new HashSet<String>(); synchronized (symbolSubscriptions) { for (String s : symbolSubscriptions.keySet()) { if (!sTit.contains(s)) { toAdd.add(s); } } for (String s : sTit) { if (!symbolSubscriptions.containsKey(s)) { toRemove.add(s); } } subscriptionsChanged = false; } if (toRemove.size() != 0) { for (String s : toRemove) { os.write("MsgType=UnregisterBook&Symbol=".getBytes()); os.write(s.getBytes()); os.write("\r\n".getBytes()); } logger.info("Removing " + toRemove); os.flush(); } if (toAdd.size() != 0) { for (String s : toAdd) { os.write("MsgType=RegisterBook&Symbol=".getBytes()); os.write(s.getBytes()); os.write("\r\n".getBytes()); } logger.info("Adding " + toAdd); os.flush(); } sTit.removeAll(toRemove); sTit.addAll(toAdd); } if (!is.ready()) { try { Thread.sleep(100); } catch (Exception e) { } continue; } String inputLine = is.readLine(); if (inputLine.startsWith("BK&")) { String[] sections = inputLine.split("&"); if (sections.length < 4) { continue; } String symbol = sections[1]; int index = 0, item = 0; String[] elements = sections[2].split("#"); List<BookEntry> bid = new ArrayList<BookEntry>(); while (index < elements.length) { Double price = new Double(elements[index++]); Long quantity = new Long(elements[index++]); index++; // Time String id = elements[index++]; bid.add(new BookEntry(null, price, quantity, 1L, id)); item++; } index = 0; item = 0; elements = sections[3].split("#"); List<BookEntry> ask = new ArrayList<BookEntry>(); while (index < elements.length) { Double price = new Double(elements[index++]); Long quantity = new Long(elements[index++]); index++; // Time String id = elements[index++]; ask.add(new BookEntry(null, price, quantity, 1L, id)); item++; } FeedSubscription subscription = symbolSubscriptions.get(symbol); if (subscription != null) { IBook oldValue = subscription.getBook(); IBook newValue = new org.eclipsetrader.core.feed.Book( bid.toArray(new IBookEntry[bid.size()]), ask.toArray(new IBookEntry[ask.size()])); subscription.setBook(newValue); subscription.addDelta(new QuoteDelta(subscription.getIdentifier(), oldValue, newValue)); subscription.fireNotification(); } } } catch (SocketException e) { for (int i = 0; i < 5 && !stopping; i++) { try { socket = new Socket("datasvr.tradearca.com", 80); is = new BufferedReader(new InputStreamReader(socket.getInputStream())); os = new BufferedOutputStream(socket.getOutputStream()); os.write("GET http://datasvr.tradearca.com/zrepeaterz/ HTTP/1.1\r\n\r\n".getBytes()); os.write("LogonRequest=DISABLED\r\n".getBytes()); os.flush(); for (String s : sTit) { os.write("MsgType=RegisterBook&Symbol=".getBytes()); os.write(s.getBytes()); os.write("\r\n".getBytes()); } os.flush(); break; } catch (Exception e1) { Status status = new Status(IStatus.ERROR, ArchipelagoPlugin.PLUGIN_ID, 0, "Error connecting to server", e); ArchipelagoPlugin.log(status); } } if (socket == null || os == null || is == null) { thread = null; return; } } catch (Exception e) { Status status = new Status(IStatus.ERROR, ArchipelagoPlugin.PLUGIN_ID, 0, "Error receiving stream", e); ArchipelagoPlugin.log(status); break; } } try { if (socket != null) { socket.close(); } socket = null; os = null; is = null; } catch (Exception e) { // Do nothing } thread = null; } }