Examples of redis.clients.jedis.Jedis.keys()

redis.clients.jedis.Jedis.keys()
Returns all the keys matching the glob-style pattern as space separated strings. For example if you have in the database the keys "foo" and "foobar" the command "KEYS foo*" will return "foo foobar".
Note that while the time complexity for this operation is O(n) the constant times are pretty low. For example Redis running on an entry level laptop can scan a 1 million keys database in 40 milliseconds. Still it's better to consider this one of the slow commands that may ruin the DB performance if not used with care.
In other words this command is intended only for debugging and special operations like creating a script to change the DB schema. Don't use it in your normal code. Use Redis Sets in order to group together a subset of objects.
Glob style patterns examples:
- h?llo will match hello hallo hhllo
- h*llo will match hllo heeeello
- h[ae]llo will match hello and hallo, but not hillo
Use \ to escape special chars if you want to match them verbatim.
Time complexity: O(n) (with n being the number of keys in the DB, and assuming keys and pattern of limited length) @param pattern @return Multi bulk reply

  public String[] keys() throws IOException {
    Jedis jedis = null;
    Boolean error = true;
    try {
      jedis = acquireConnection();
      Set<String> keySet = jedis.keys("*");
      error = false;
      return keySet.toArray(new String[keySet.size()]);
    } finally {
      if (jedis != null) {
        returnConnection(jedis, error);

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         public Object handle(Request request, Response response) {
           Jedis jedis = null;
           Boolean error = true;
           try {
             jedis = acquireConnection();
             Set<String> keySet = jedis.keys("*");
             error = false;
             return keySet.toArray(new String[keySet.size()]);
           } finally {
             if (jedis != null) {
               returnConnection(jedis, error);

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           Jedis jedis = null;
           Boolean error = true;
           try {
             jedis = acquireConnection();
             jedis.flushDB();
             Set<String> keySet = jedis.keys("*");
             error = false;
             return keySet.toArray(new String[keySet.size()]);
           } finally {
             if (jedis != null) {
               returnConnection(jedis, error);

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            try {
                Jedis jedis = jedisPool.getResource();
                try {
                    if (service.endsWith(Constants.ANY_VALUE)) {
                        admin = true;
                        Set<String> keys = jedis.keys(service);
                        if (keys != null && keys.size() > 0) {
                            Map<String, Set<String>> serviceKeys = new HashMap<String, Set<String>>();
                            for (String key : keys) {
                                String serviceKey = toServicePath(key);
                                Set<String> sk = serviceKeys.get(serviceKey);

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                            for (Set<String> sk : serviceKeys.values()) {
                                doNotify(jedis, sk, url, Arrays.asList(listener));
                            }
                        }
                    } else {
                        doNotify(jedis, jedis.keys(service + Constants.PATH_SEPARATOR + Constants.ANY_VALUE), url, Arrays.asList(listener));
                    }
                    success = true;
                    break; // 只需读一个服务器的数据
                } finally {
                    jedisPool.returnResource(jedis);

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            try {
                Jedis jedis = jedisPool.getResource();
                try {
                    if (service.endsWith(Constants.ANY_VALUE)) {
                        admin = true;
                        Set<String> keys = jedis.keys(service);
                        if (keys != null && keys.size() > 0) {
                            Map<String, Set<String>> serviceKeys = new HashMap<String, Set<String>>();
                            for (String key : keys) {
                                String serviceKey = toServicePath(key);
                                Set<String> sk = serviceKeys.get(serviceKey);

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                            for (Set<String> sk : serviceKeys.values()) {
                                doNotify(jedis, sk, url, Arrays.asList(listener));
                            }
                        }
                    } else {
                        doNotify(jedis, jedis.keys(service + Constants.PATH_SEPARATOR + Constants.ANY_VALUE), url, Arrays.asList(listener));
                    }
                    success = true;
                    break; // 只需读一个服务器的数据
                } finally {
                    jedisPool.returnResource(jedis);

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            try {
                Jedis jedis = jedisPool.getResource();
                try {
                    if (service.endsWith(Constants.ANY_VALUE)) {
                        admin = true;
                        Set<String> keys = jedis.keys(service);
                        if (keys != null && keys.size() > 0) {
                            Map<String, Set<String>> serviceKeys = new HashMap<String, Set<String>>();
                            for (String key : keys) {
                                String serviceKey = toServicePath(key);
                                Set<String> sk = serviceKeys.get(serviceKey);

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                            for (Set<String> sk : serviceKeys.values()) {
                                doNotify(jedis, sk, url, Arrays.asList(listener));
                            }
                        }
                    } else {
                        doNotify(jedis, jedis.keys(service + Constants.PATH_SEPARATOR + Constants.ANY_VALUE), url, Arrays.asList(listener));
                    }
                    success = true;
                    break; // 只需读一个服务器的数据
                } finally {
                    jedisPool.returnResource(jedis);

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    if (jedis == null) {
      return list;
    }
    try {
      // Deserialize each journal, build the ticket, and optionally filter
      Set<String> keys = jedis.keys(key(repository, KeyType.journal, "*"));
      for (String key : keys) {
        // {repo}:journal:{id}
        String id = key.split(":")[2];
        long ticketId = Long.parseLong(id);
        List<Change> changes = getJournal(jedis, repository, ticketId);

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