com.google.wave.splash.data.ProfileStore.java Source code

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Here is the source code for com.google.wave.splash.data.ProfileStore.java

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/**
 * Copyright 2010 Google Inc.
 *
 * 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.google.wave.splash.data;

import com.google.common.collect.Maps;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.wave.api.ParticipantProfile;

import java.util.Collection;
import java.util.Map;

/**
 * Implements a profile store.
 *
 * @author David Byttow
 */
@Singleton
public class ProfileStore {
    private final Memcache memcache;
    private final FakeProfileGenerator profileGenerator;

    @Inject
    ProfileStore(Memcache memcache, FakeProfileGenerator profileGenerator) {
        this.memcache = memcache;
        this.profileGenerator = profileGenerator;
    }

    /**
     * Retrieves participant profiles from a collection of participant ids.
     *
     * @param participantIds the participants to retrieve.
     * @return map of participant profiles.
     */
    public Map<String, ParticipantProfile> getProfiles(Collection<String> participantIds) {
        Map<String, ParticipantProfile> profiles = Maps.newHashMapWithExpectedSize(participantIds.size());
        for (String id : participantIds) {
            profiles.put(id, getProfile(id));
        }
        return profiles;
    }

    /**
     * Stores profile information about a given participant by id.
     */
    public void putProfile(String participantId, ParticipantProfile profile) {
        memcache.store(getKey(participantId), profile);
    }

    private ParticipantProfile getProfile(String participantId) {
        String key = getKey(participantId);

        ParticipantProfile profile = memcache.retrieve(key);
        if (profile != null) {
            return profile;
        }

        return profileGenerator.generateProfile(participantId);
    }

    private static String getKey(String participantId) {
        return "p/" + participantId;
    }
}