package org.jboss.as.appclient.service;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.concurrent.TimeUnit;
import javax.security.auth.callback.CallbackHandler;
import org.jboss.as.appclient.logging.AppClientLogger;
import org.jboss.ejb.client.ContextSelector;
import org.jboss.ejb.client.EJBClientContext;
import org.jboss.ejb.client.remoting.IoFutureHelper;
import org.jboss.remoting3.Connection;
import org.jboss.remoting3.Endpoint;
import org.jboss.remoting3.Remoting;
import org.jboss.remoting3.remote.RemoteConnectionProviderFactory;
import org.xnio.IoFuture;
import org.xnio.OptionMap;
import org.xnio.Options;
/**
* Selector that does not create a connection until it is actually required.
* <p/>
* This allows the user to perform a login before the connection is established.
*
* @author Stuart Douglas
*/
public class LazyConnectionContextSelector implements ContextSelector<EJBClientContext> {
private final String hostUrl;
private final CallbackHandler callbackHandler;
private Endpoint endpoint;
private Connection connection;
private volatile EJBClientContext clientContext;
public LazyConnectionContextSelector(final String hostUrl, final CallbackHandler callbackHandler) {
this.hostUrl = hostUrl;
this.callbackHandler = callbackHandler;
}
private synchronized void createConnection() {
try {
endpoint = Remoting.createEndpoint("endpoint", OptionMap.EMPTY);
endpoint.addConnectionProvider("remote", new RemoteConnectionProviderFactory(), OptionMap.create(Options.SSL_ENABLED, Boolean.FALSE));
// open a connection
final IoFuture<Connection> futureConnection = endpoint.connect(new URI(hostUrl), OptionMap.create(Options.SASL_POLICY_NOANONYMOUS, Boolean.FALSE, Options.SASL_POLICY_NOPLAINTEXT, Boolean.FALSE), callbackHandler);
connection = IoFutureHelper.get(futureConnection, 30L, TimeUnit.SECONDS);
final EJBClientContext ejbClientContext = EJBClientContext.create();
ejbClientContext.registerConnection(connection);
this.clientContext = ejbClientContext;
} catch (IOException e) {
throw new RuntimeException(e);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
@Override
public EJBClientContext getCurrent() {
if (clientContext == null) {
synchronized (this) {
if (clientContext == null) {
createConnection();
}
}
}
return clientContext;
}
public synchronized void close() {
try {
if (connection != null) {
connection.close();
}
} catch (IOException e) {
AppClientLogger.ROOT_LOGGER.exceptionClosingConnection(e);
}
try {
if (endpoint != null) {
endpoint.close();
}
} catch (IOException e) {
AppClientLogger.ROOT_LOGGER.exceptionClosingConnection(e);
}
}
}