org.whispersystems.textsecuregcm.storage.PendingDevicesManager.java Source code

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Here is the source code for org.whispersystems.textsecuregcm.storage.PendingDevicesManager.java

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/**
 * Copyright (C) 2014 Open WhisperSystems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.whispersystems.textsecuregcm.storage;

import com.google.common.base.Optional;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

public class PendingDevicesManager {

    private static final String CACHE_PREFIX = "pending_devices::";

    private final PendingDevices pendingDevices;
    private final JedisPool cacheClient;

    public PendingDevicesManager(PendingDevices pendingDevices, JedisPool cacheClient) {
        this.pendingDevices = pendingDevices;
        this.cacheClient = cacheClient;
    }

    public void store(String number, String code) {
        memcacheSet(number, code);
        pendingDevices.insert(number, code);
    }

    public void remove(String number) {
        memcacheDelete(number);
        pendingDevices.remove(number);
    }

    public Optional<String> getCodeForNumber(String number) {
        Optional<String> code = memcacheGet(number);

        if (!code.isPresent()) {
            code = Optional.fromNullable(pendingDevices.getCodeForNumber(number));

            if (code.isPresent()) {
                memcacheSet(number, code.get());
            }
        }

        return code;
    }

    private void memcacheSet(String number, String code) {
        try (Jedis jedis = cacheClient.getResource()) {
            jedis.set(CACHE_PREFIX + number, code);
        }
    }

    private Optional<String> memcacheGet(String number) {
        try (Jedis jedis = cacheClient.getResource()) {
            return Optional.fromNullable(jedis.get(CACHE_PREFIX + number));
        }
    }

    private void memcacheDelete(String number) {
        try (Jedis jedis = cacheClient.getResource()) {
            jedis.del(CACHE_PREFIX + number);
        }
    }

}