@Override
protected void storeSession(final RedisSession session) {
if (!session.redisMap.isEmpty()) {
final Map<String, String> toStore =
session.redisMap.containsKey("attributes")
? session.redisMap
: new TreeMap<String, String>(session.redisMap);
if (toStore.containsKey("attributes"))
toStore.put("attributes", serializer.serialize(session.getSessionAttributes()));
LOG.debug(
"[RedisSessionManager] storeSession - Storing session id={}", session.getClusterId());
jedisExecutor.execute(
new JedisCallback<Object>() {
@Override
public Object execute(Jedis jedis) {
session.lastSaved = System.currentTimeMillis();
toStore.put("lastSaved", "" + session.lastSaved);
return jedis.multi(
new TransactionBlock() {
@Override
public void execute() throws JedisException {
final String key =
RedisSessionIdManager.REDIS_SESSION_KEY + session.getClusterId();
super.hmset(key, toStore);
int ttl = session.getMaxInactiveInterval();
if (ttl > 0) {
super.expire(key, ttl);
}
}
});
}
});
session.redisMap.clear();
}
}
@Override
protected void deleteSession(final RedisSession session) {
LOG.debug(
"[RedisSessionManager] deleteSession - Deleting from Redis session id={}",
session.getClusterId());
jedisExecutor.execute(
new JedisCallback<Object>() {
@Override
public Object execute(Jedis jedis) {
return jedis.del(RedisSessionIdManager.REDIS_SESSION_KEY + session.getClusterId());
}
});
}
private RedisSession loadFromStore(final String clusterId, final RedisSession current) {
List<String> redisData =
jedisExecutor.execute(
new JedisCallback<List<String>>() {
@Override
public List<String> execute(Jedis jedis) {
final String key = RedisSessionIdManager.REDIS_SESSION_KEY + clusterId;
if (current == null) {
return jedis.exists(key) ? jedis.hmget(key, FIELDS) : null;
} else {
String val = jedis.hget(key, "lastSaved");
if (val == null) {
// no session in store
return Collections.emptyList();
}
if (current.lastSaved != Long.parseLong(val)) {
// session has changed - reload
return jedis.hmget(key, FIELDS);
} else {
// session dit not changed in cache since last save
return null;
}
}
}
});
if (redisData == null) {
// case where session has not been modified
return current;
}
if (redisData.isEmpty() || redisData.get(0) == null) {
// no session found in redis (no data)
return null;
}
Map<String, String> data = new HashMap<String, String>();
for (int i = 0; i < FIELDS.length; i++) data.put(FIELDS[i], redisData.get(i));
String attrs = data.get("attributes");
//noinspection unchecked
return new RedisSession(
data,
attrs == null ? new HashMap<String, Object>() : serializer.deserialize(attrs, Map.class));
}