/*
* Copyright (C) 2012-2015 DataStax Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.datastax.driver.core;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import static org.assertj.core.api.Assertions.fail;
/**
* Fake Cassandra host that will cause a given error when the driver tries to connect to it.
*/
public class FakeHost {
public enum Behavior {THROWING_CONNECT_TIMEOUTS, THROWING_OPERATION_TIMEOUTS}
final String address;
private final int port;
private final Behavior behavior;
private final ExecutorService executor;
FakeHost(String address, int port, Behavior behavior) {
this.address = address;
this.port = port;
this.behavior = behavior;
this.executor = Executors.newSingleThreadExecutor();
}
public void start() {
executor.execute(new AcceptClientAndWait(address, port, behavior));
}
public void stop() {
executor.shutdownNow();
}
private static class AcceptClientAndWait implements Runnable {
private final String address;
private final int port;
private final Behavior behavior;
public AcceptClientAndWait(String address, int port, Behavior behavior) {
this.address = address;
this.port = port;
this.behavior = behavior;
}
@Override
public void run() {
ServerSocket server = null;
Socket client = null;
try {
InetAddress bindAddress = InetAddress.getByName(address);
int backlog = (behavior == Behavior.THROWING_CONNECT_TIMEOUTS)
? 1
: -1; // default
server = new ServerSocket(port, backlog, bindAddress);
if (behavior == Behavior.THROWING_CONNECT_TIMEOUTS) {
// fill backlog queue
client = new Socket();
client.connect(server.getLocalSocketAddress());
}
TimeUnit.MINUTES.sleep(10);
fail("Mock host wasn't expected to live more than 10 minutes");
} catch (IOException e) {
fail("Unexpected I/O exception", e);
} catch (InterruptedException e) {
// interruption is the expected way to stop this runnable, exit
try {
if (client != null)
client.close();
server.close();
} catch (IOException e1) {
fail("Unexpected error while closing sockets", e);
}
}
}
}
}