org.marketcetera.marketdata.yahoo.YahooFeed Maven / Gradle / Ivy
package org.marketcetera.marketdata.yahoo;
import static org.marketcetera.marketdata.AssetClass.EQUITY;
import static org.marketcetera.marketdata.AssetClass.FUTURE;
import static org.marketcetera.marketdata.AssetClass.OPTION;
import static org.marketcetera.marketdata.Capability.EVENT_BOUNDARY;
import static org.marketcetera.marketdata.Capability.LATEST_TICK;
import static org.marketcetera.marketdata.Capability.MARKET_STAT;
import static org.marketcetera.marketdata.Capability.TOP_OF_BOOK;
import java.util.*;
import java.util.concurrent.atomic.AtomicLong;
import javax.annotation.concurrent.GuardedBy;
import org.marketcetera.core.NoMoreIDsException;
import org.marketcetera.marketdata.*;
import org.marketcetera.util.misc.ClassVersion;
/* $License$ */
/**
* Market data feed implementation for the Yahoo market data supplier.
*
* @author Colin DuPlantis
* @version $Id: YahooFeed.java 16154 2012-07-14 16:34:05Z colin $
* @since 2.1.4
*/
@ClassVersion("$Id: YahooFeed.java 16154 2012-07-14 16:34:05Z colin $")
class YahooFeed
extends AbstractMarketDataFeed,
YahooFeed>
implements YahooFeedServices
{
/* (non-Javadoc)
* @see org.marketcetera.marketdata.MarketDataFeed#getCapabilities()
*/
@Override
public Set getCapabilities()
{
return capabilities;
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.MarketDataFeed#getSupportedAssetClasses()
*/
@Override
public Set getSupportedAssetClasses()
{
return assetClasses;
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.yahoo.FeedServices#doDataReceived(java.lang.String, java.lang.Object)
*/
@Override
public void doDataReceived(String inHandle,
Object inData)
{
dataReceived(inHandle,
inData);
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.yahoo.FeedServices#getRefreshInterval()
*/
@Override
public int getRefreshInterval()
{
return refreshInterval;
}
/**
* Resets the request counter.
*/
void resetCounter()
{
client.resetRequestcounter();
}
/**
* Gets the current request counter.
*
* @return a long value
*/
long getRequestCounter()
{
return client.getRequestCounter();
}
/**
* Create a new YahooFeed instance.
*
* @param inProviderName a String value
* @throws NoMoreIDsException if the feed cannot be constructed
*/
YahooFeed(String inProviderName,
YahooClientFactory inFactory)
throws NoMoreIDsException
{
super(FeedType.DELAYED,
inProviderName);
client = inFactory.getClient(this);
}
/**
* Sets the refresh interval for retrieving market data.
*
* Changing this value takes effect immediately.
*
* @param inRefreshInterval an int value
*/
void setRefreshInterval(int inRefreshInterval)
{
refreshInterval = inRefreshInterval;
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#doCancel(java.lang.String)
*/
@Override
protected void doCancel(String inHandle)
{
synchronized(requests) {
YahooRequest request = requests.remove(inHandle);
if(request != null) {
client.cancel(request);
}
}
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#doLogin(org.marketcetera.marketdata.MarketDataFeedCredentials)
*/
@Override
protected boolean doLogin(YahooFeedCredentials inCredentials)
{
return client.login(inCredentials);
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#doLogout()
*/
@Override
protected void doLogout()
{
client.logout();
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#isLoggedIn()
*/
@Override
protected boolean isLoggedIn()
{
return client.isLoggedIn();
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#doMarketDataRequest(java.lang.Object)
*/
@Override
protected List doMarketDataRequest(List inRequests)
throws FeedException
{
List handles = new ArrayList();
synchronized(requests) {
for(YahooRequest request : inRequests) {
String handle = generateHandle();
handles.add(handle);
request.setHandle(handle);
requests.put(handle,
request);
client.request(request);
}
return handles;
}
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#generateToken(org.marketcetera.marketdata.MarketDataFeedTokenSpec)
*/
@Override
protected YahooFeedToken generateToken(MarketDataFeedTokenSpec inTokenSpec)
throws FeedException
{
return new YahooFeedToken(inTokenSpec,
this);
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#getEventTranslator()
*/
@Override
protected YahooFeedEventTranslator getEventTranslator()
{
return YahooFeedEventTranslator.INSTANCE;
}
/* (non-Javadoc)
* @see org.marketcetera.marketdata.AbstractMarketDataFeed#getMessageTranslator()
*/
@Override
protected YahooFeedMessageTranslator getMessageTranslator()
{
return YahooFeedMessageTranslator.INSTANCE;
}
/**
* Generates a request handle.
*
* @return a String value
*/
private String generateHandle()
{
return String.format("yahoo-%s", //$NON-NLS-1$
counter.incrementAndGet());
}
/**
* default interval at which to refresh the market data
*/
private volatile int refreshInterval = 250;
/**
* asset classes supported by this adapter
*/
private static final Set assetClasses = new HashSet(Arrays.asList(new AssetClass[] { EQUITY,OPTION,FUTURE }));
/**
* capabilities of this adapter
*/
private static final Set capabilities = new HashSet(Arrays.asList(new Capability[] { TOP_OF_BOOK,LATEST_TICK,MARKET_STAT,EVENT_BOUNDARY }));
/**
* stores the active requests
*/
@GuardedBy("requests")
private final Map requests = new HashMap();
/**
* counter used to count requests
*/
private final AtomicLong counter = new AtomicLong(0);
/**
* client implementation to use
*/
private final YahooClient client;
}