Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 120)

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BlackBerry Java Development Environment Development Guide

* the shared data in a synchronized block, but produces less overhead.

private volatile boolean _start = false;

private volatile boolean _stop = false;

/**

* Retrieve the URL. The synchronized keyword makes sure that only one

* thread at a time can call this method on a ConnectionThread object.

public synchronized String getUrl() {

return _theUrl;

}

/**

* Fetch a page. This method is invoked on the connection thread by

* fetchPage(), which is invoked in the application constructor when

* the user selects the Fetch menu item.

public void fetch(String url) {

_start = true;

_theUrl = url;

}

/**

* Close the thread. Invoked when the application exits.

public void stop() {

_stop = true;

}

/**

* Open an input stream and extract data. Invoked when the thread

* is started.

public void run() {

for(;;) {

// Thread control.

while( !_start && !_stop) {

// No connections are open for fetch requests,

// but the thread has not been stopped.

try {

sleep(TIMEOUT);

} catch (InterruptedException e) {

System.err.println(e.toString());

}

// Exit condition.

if ( _stop ) {

return;

}

/* Ensure that fetch requests are not missed

* while received data is processed.

synchronized(this) {

// Open the connection and extract the data.

StreamConnection s = null;

try {

s = (StreamConnection)Connector.open(getUrl());

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