Examples of redis.clients.jedis.Transaction

redis.clients.jedis.Transaction
Transaction is nearly identical to Pipeline, only differences are the multi/discard behaviors

        Set<Tuple> followers = conn.zrangeByScoreWithScores(
            "followers:" + uid,
            String.valueOf(start), "inf",
            0, POSTS_PER_PASS);


        Transaction trans = conn.multi();
        for (Tuple tuple : followers){
            String follower = tuple.getElement();
            start = tuple.getScore();
            trans.zadd("home:" + follower, postTime, String.valueOf(postId));
            trans.zrange("home:" + follower, 0, -1);
            trans.zremrangeByRank(
                "home:" + follower, 0, 0 - HOME_TIMELINE_SIZE - 1);
        }
        trans.exec();


        if (followers.size() >= POSTS_PER_PASS) {
            try{
                Method method = getClass().getDeclaredMethod(
                    "syndicateStatus", Jedis.class, Long.TYPE, Long.TYPE, Long.TYPE, Double.TYPE);

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        try{
            if (!String.valueOf(uid).equals(conn.hget(key, "uid"))) {
                return false;
            }


            Transaction trans = conn.multi();
            trans.del(key);
            trans.zrem("profile:" + uid, String.valueOf(statusId));
            trans.zrem("home:" + uid, String.valueOf(statusId));
            trans.hincrBy("user:" + uid, "posts", -1);
            trans.exec();


            return true;
        }finally{
            releaseLock(conn, key, lock);
        }

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        Jedis conn, long uid, int page, int count)
    {
        Set<String> statusIds = conn.zrevrange(
            "home:" + uid, (page - 1) * count, page * count - 1);


        Transaction trans = conn.multi();
        for (String id : statusIds) {
            trans.hgetAll("status:" + id);
        }


        List<Map<String,String>> statuses = new ArrayList<Map<String,String>>();
        for (Object result : trans.exec()) {
            Map<String,String> status = (Map<String,String>)result;
            if (status != null && status.size() > 0){
                statuses.add(status);
            }
        }

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        }


        Collections.sort(messages);
        messages = messages.subList(0, HOME_TIMELINE_SIZE);


        Transaction trans = conn.multi();
        if (messages.size() > 0) {
            for (Tuple tuple : messages) {
                trans.zadd(timeline, tuple.getScore(), tuple.getElement());
            }
        }
        trans.zremrangeByRank(timeline, 0, 0 - HOME_TIMELINE_SIZE - 1);
        trans.exec();


        if (users.size() >= REFILL_USERS_STEP) {
            try{
                Method method = getClass().getDeclaredMethod(
                    "refillTimeline", Jedis.class, String.class, String.class, Double.TYPE);

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            base = "list:statuses:";
        }
        Set<Tuple> followers = conn.zrangeByScoreWithScores(
            key, String.valueOf(start), "inf", 0, POSTS_PER_PASS);


        Transaction trans = conn.multi();
        for (Tuple tuple : followers) {
            start = tuple.getScore();
            String follower = tuple.getElement();
            trans.zrem(base + follower, String.valueOf(statusId));
        }
        trans.exec();


        Method method = null;
        try{
            method = getClass().getDeclaredMethod(
                "cleanTimelines", Jedis.class,

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        }
    }


    public void addUpdateContact(Jedis conn, String user, String contact) {
        String acList = "recent:" + user;
        Transaction trans = conn.multi();
        trans.lrem(acList, 0, contact);
        trans.lpush(acList, contact);
        trans.ltrim(acList, 0, 99);
        trans.exec();
    }

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            conn.watch(zsetName);
            int sindex = conn.zrank(zsetName, start).intValue();
            int eindex = conn.zrank(zsetName, end).intValue();
            int erange = Math.min(sindex + 9, eindex - 2);


            Transaction trans = conn.multi();
            trans.zrem(zsetName, start);
            trans.zrem(zsetName, end);
            trans.zrange(zsetName, sindex, erange);
            List<Object> results = trans.exec();
            if (results != null){
                items = (Set<String>)results.get(results.size() - 1);
                break;
            }
        }

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        String lockKey = "lock:" + lockName;


        while (true){
            conn.watch(lockKey);
            if (identifier.equals(conn.get(lockKey))){
                Transaction trans = conn.multi();
                trans.del(lockKey);
                List<Object> results = trans.exec();
                if (results == null){
                    continue;
                }
                return true;
            }

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        String identifier = UUID.randomUUID().toString();
        String czset = semname + ":owner";
        String ctr = semname + ":counter";


        long now = System.currentTimeMillis();
        Transaction trans = conn.multi();
        trans.zremrangeByScore(
            semname.getBytes(),
            "-inf".getBytes(),
            String.valueOf(now - timeout).getBytes());
        ZParams params = new ZParams();
        params.weights(1, 0);
        trans.zinterstore(czset, params, czset, semname);
        trans.incr(ctr);
        List<Object> results = trans.exec();
        int counter = ((Long)results.get(results.size() - 1)).intValue();


        trans = conn.multi();
        trans.zadd(semname, now, identifier);
        trans.zadd(czset, counter, identifier);
        trans.zrank(czset, identifier);
        results = trans.exec();
        int result = ((Long)results.get(results.size() - 1)).intValue();
        if (result < limit){
            return identifier;
        }


        trans = conn.multi();
        trans.zrem(semname, identifier);
        trans.zrem(czset, identifier);
        trans.exec();
        return null;
    }

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    }


    public boolean releaseFairSemaphore(
        Jedis conn, String semname, String identifier)
    {
        Transaction trans = conn.multi();
        trans.zrem(semname, identifier);
        trans.zrem(semname + ":owner", identifier);
        List<Object> results = trans.exec();
        return (Long)results.get(results.size() - 1) == 1;
    }

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