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package act.app;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.Act;
import act.Destroyable;
import act.app.event.AppEventId;
import act.cli.CliSession;
import org.osgl.exception.ConfigurationException;
import org.osgl.logging.LogManager;
import org.osgl.logging.Logger;
import org.osgl.util.C;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Servicing CLI session
*/
@ApplicationScoped
public class CliServer extends AppServiceBase<CliServer> implements Runnable {
private static final Logger logger = LogManager.get(CliServer.class);
private ScheduledThreadPoolExecutor executor;
private AtomicBoolean running = new AtomicBoolean();
private ConcurrentMap<String, CliSession> sessions = new ConcurrentHashMap<String, CliSession>();
private int port;
private ServerSocket serverSocket;
private Thread monitorThread;
@Inject
CliServer(App app) {
super(app);
port = app.config().cliPort();
initExecutor(app);
start();
}
@Override
protected void releaseResources() {
stop();
executor.shutdown();
Destroyable.Util.destroyAll(sessions.values(), ApplicationScoped.class);
sessions.clear();
}
public void remove(CliSession session) {
sessions.remove(session.id());
}
@Override
public void run() {
while (running()) {
Socket socket;
try {
socket = serverSocket.accept();
CliSession session = new CliSession(socket, this);
sessions.put(session.id(), session);
executor.submit(session);
} catch (Exception e) {
if (isDestroyed()) {
return;
}
logger.error(e, "Error processing CLI session");
stop();
return;
} finally {
// Note we cannot close socket here. The ownership
// of socket has been transferred to the CliSession
// and it is up to the session to manage the socket
// IO.close(socket);
}
}
}
void stop() {
if (!running()) {
return;
}
running.set(false);
if (null != monitorThread) {
monitorThread.interrupt();
monitorThread = null;
}
try {
serverSocket.close();
} catch (IOException e) {
logger.warn(e, "error closing server socket");
} finally {
serverSocket = null;
}
}
void start() {
if (running()) {
return;
}
try {
serverSocket = new ServerSocket(port);
running.set(true);
// start server thread
executor.submit(this);
// start expiration monitor thread
executor.submit(new Runnable() {
@Override
public void run() {
monitorThread = Thread.currentThread();
int expiration = app().config().cliSessionExpiration();
while (running()) {
List<CliSession> toBeRemoved = C.newList();
for (CliSession session : sessions.values()) {
if (session.expired(expiration)) {
toBeRemoved.add(session);
}
}
for (CliSession session: toBeRemoved) {
session.stop("Your session has expired");
sessions.remove(session.id());
}
try {
Thread.sleep(60 * 1000);
} catch (InterruptedException e) {
return;
}
app().checkUpdates(false);
}
}
});
app().jobManager().on(AppEventId.ACT_START, new Runnable() {
@Override
public void run() {
Act.LOGGER.info("CLI server started on port: %s", port);
}
});
} catch (IOException e) {
throw new ConfigurationException(e, "Cannot start CLI server on port: %s", port);
}
}
boolean running() {
return running.get();
}
private void initExecutor(App app) {
// cli session thread + server thread + expiration monitor thread
int poolSize = app.config().maxCliSession() + 2;
executor = new ScheduledThreadPoolExecutor(poolSize, new AppThreadFactory("cli", true), new ThreadPoolExecutor.AbortPolicy());
}
}