public URLConnection openConnection() throws IOException {
final URLConnection con = url.openConnection();
con.setUseCaches(false);
con.setConnectTimeout(networkTimeout.intValue(TimeUnit.MILLISECONDS));
con.setReadTimeout(networkTimeout.intValue(TimeUnit.MILLISECONDS));
if (headers != null) {
for (final Entry<String, String> header : headers.entrySet()) {
con.setRequestProperty(header.getKey(), header.getValue());
}
}
return con;
}
private void configure(final String name) {
/*
* All executors should be shutdown on application shutdown.
*/
ShutdownHookManager.register(shutdownHook);
/*
* All threads should stop after 60 seconds of idle time
*/
delegate.setKeepAliveTime(
FIXED_THREAD_KEEPALIVE_TIMEOUT.longValue(), FIXED_THREAD_KEEPALIVE_TIMEOUT.getTimeUnit());
/*
* Fixes non starting with corepoolsize von 0 and not filled queue (Java Conurrency In Practice Chapter 8.3.1).
* If this bug can occur, a exception would be thrown here.
*/
delegate.allowCoreThreadTimeOut(true);
/*
* Named threads improve debugging.
*/
delegate.setThreadFactory(new WrappedThreadFactory(name, delegate.getThreadFactory()));
}
public boolean isServerResponding() {
try {
final Socket socket = new Socket();
socket.connect(
Addresses.asAddress(url.getHost(), url.getPort()),
networkTimeout.intValue(TimeUnit.MILLISECONDS));
socket.close();
return true;
} catch (final IOException e) {
return false;
}
}