PrincipalServiceImpl.java

/*
 * Copyright (C) 2015, 2016 WTFDYUM
 *
 * This file is part of the WTFDYUM project.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jeanchampemont.wtfdyum.service.impl;

import com.google.common.base.Preconditions;
import com.jeanchampemont.wtfdyum.dto.Principal;
import com.jeanchampemont.wtfdyum.service.PrincipalService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.Set;

@Service
public class PrincipalServiceImpl implements PrincipalService {

    private static final String MEMBERS_KEY = "MEMBERS";

    @Autowired
    public PrincipalServiceImpl(final RedisTemplate<String, Principal> principalRedisTemplate,
            final RedisTemplate<String, Long> longRedisTemplate) {
        this.principalRedisTemplate = principalRedisTemplate;
        this.longRedisTemplate = longRedisTemplate;
    }

    private final RedisTemplate<String, Principal> principalRedisTemplate;

    private final RedisTemplate<String, Long> longRedisTemplate;

    @Override
    public int countMembers() {
        return longRedisTemplate.opsForSet().size(MEMBERS_KEY).intValue();
    }

    @Override
    public Principal get(final Long id) {
        Preconditions.checkNotNull(id);
        return principalRedisTemplate.opsForValue().get(id.toString());
    }

    @Override
    public Set<Long> getMembers() {
        return longRedisTemplate.opsForSet().members(MEMBERS_KEY);
    }

    @Override
    public void saveUpdate(final Principal user) {
        Preconditions.checkNotNull(user);
        Preconditions.checkNotNull(user.getUserId());

        principalRedisTemplate.opsForValue().set(user.getUserId().toString(), user);
        longRedisTemplate.opsForSet().add(MEMBERS_KEY, user.getUserId());
    }

}