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package org.openslx.bwlp.sat.fileserv.cow;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.openslx.bwlp.sat.database.mappers.DbLecture.LaunchData;
import org.openslx.bwlp.sat.thrift.SessionManager;
import org.openslx.bwlp.thrift.iface.UserInfo;
import org.openslx.util.QuickTimer;
import org.openslx.util.QuickTimer.Task;
public class CowSessionManager {
private static final ReadWriteLock SESSION_LOCK = new ReentrantReadWriteLock();
private static final Map<String, CowSession> SESSIONS = new HashMap<>();
static {
QuickTimer.scheduleAtFixedDelay(new Task() {
@Override
public void fire() {
Lock lock = SESSION_LOCK.writeLock();
lock.lock();
try {
for (Iterator<CowSession> iterator = SESSIONS.values().iterator(); iterator.hasNext();) {
CowSession s = iterator.next();
if (s.timedout()) {
s.abort();
iterator.remove();
}
}
} finally {
lock.unlock();
}
}
}, 3600_577, 3601_010);
}
public static CowSession get(String id) {
Lock lock = SESSION_LOCK.readLock();
lock.lock();
try {
return SESSIONS.get(id);
} finally {
lock.unlock();
}
}
public static boolean add(String id, CowSession session) {
Lock lock = SESSION_LOCK.writeLock();
lock.lock();
try {
if (SESSIONS.containsKey(id))
return false;
SESSIONS.put(id, session);
return true;
} finally {
lock.unlock();
}
}
/**
* Create a new cow session for the given image. Returns an according session id.
* On error, an exception is thrown, this will never return null.
*/
public static String create(String cowid, LaunchData ld, String sessionType) throws RuntimeException {
UserInfo user = SessionManager.get(cowid);
if (user == null)
throw new RuntimeException("Unknown user");
//
String sessionId = UUID.randomUUID().toString();
CowSession session = new CowSession(ld.imagePath, ld.configuration, ld.imageBaseId, ld.vmName, ld.restricted, user, sessionType);
if (session.getError() != null) {
throw new RuntimeException(session.getError());
}
add(sessionId, session);
return sessionId;
}
}
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