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Class sunw.demo.quote.QuoteServerImpl

java.lang.Object
   |
   +----java.rmi.server.RemoteObject
           |
           +----java.rmi.server.RemoteServer
                   |
                   +----java.rmi.server.UnicastRemoteObject
                           |
                           +----sunw.demo.quote.QuoteServerImpl

public class QuoteServerImpl

extends UnicastRemoteObject

implements QuoteServer

Stock information can be collected from one of two sources: "Local" or "Yahoo". The latter is a real (delayed) data feed that reports quotes in a format that can be easily parsed. The "Local" quote source is just a random number generator. The advantage of the local source is that it can produce quotes quickly, this can make demos more interesting.

addQuoteListener(QuoteListener)

The specified QuoteListeners quoteChanged method will be called each time new quote data is available.

getHttpProxy()

The HTTP proxy host and port number are stored in the System property list under "http.proxyHost" and "http.proxyPort".

getQuoteEventRate()

getQuoteSource()

removeQuoteListener(QuoteListener)

Remove this QuoteListener from the servers internal list.

setHttpProxy(HttpProxy)

If the specified host is valid and the port number is positive then set the System properties: "http.proxyHost" and "http.proxyPort".

setQuoteEventRate(int)

Sets the quote source polling rate.

setQuoteSource(String)

Specify where quote data will come from.

 public int getQuoteEventRate()

Returns:

the quote source polling rate in seconds

 public void setQuoteEventRate(int x)

Sets the quote source polling rate.

Parameters:

x - the polling rate in seconds

 public synchronized void addQuoteListener(QuoteListener x) throws RemoteException

The specified QuoteListeners quoteChanged method will be called each time new quote data is available. The QuoteListener object is added to a list of QuoteListeners managed by this server, it can be removed with removeQuoteListener.

Parameters:

l - the QuoteListener

See Also:

removeQuoteListener

 public synchronized void removeQuoteListener(QuoteListener x) throws RemoteException

Remove this QuoteListener from the servers internal list. If the QuoteListener isn't on the list, silently do nothing.

Parameters:

l - the QuoteListener

See Also:

addQuoteListener

 public HttpProxy getHttpProxy() throws RemoteException

The HTTP proxy host and port number are stored in the System property list under "http.proxyHost" and "http.proxyPort". We just combine the two values into a single object here.

Returns:

the HTTP proxy host and port number for this server

See Also:

setHttpProxy

 public void setHttpProxy(HttpProxy x) throws RemoteException

If the specified host is valid and the port number is positive then set the System properties: "http.proxyHost" and "http.proxyPort". Otherwise throw a RemoteException. The HTTP proxy values only matter if the quote source is "Yahoo", i.e. if we're going to the internet for data.

Parameters:

x - the new values for host and port

See Also:

getHttpProxy

 public String getQuoteSource() throws RemoteException

Returns:

a string that represents the source for quote data

See Also:

setQuoteSource

 public void setQuoteSource(String x) throws RemoteException

Specify where quote data will come from. If quoteSource is "Local" then the sunw.demo.LocalQuote is used, it generates moderately random data. If quoteSource is "Yahoo" then the sunw.demo.YahooQuote class is used, it collects quote data from the YahooQuote web site.

Parameters:

x - must be "Yahoo" or "Local"

See Also:

getQuoteSource

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