io.gravitee.resource.cache.hazelcast.HazelcastDelegate Maven / Gradle / Ivy

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The resource is used to maintain a cache and link it to the API lifecycle. It means that the cache is initialized when the API is starting and released when API is stopped.

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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.resource.cache.hazelcast;

import com.hazelcast.map.IMap;
import io.gravitee.resource.cache.api.Cache;
import io.gravitee.resource.cache.api.Element;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class HazelcastDelegate implements Cache {

    private final IMap cache;
    private final int timeToLiveSeconds;

    public HazelcastDelegate(IMap cache, int timeToLiveSeconds) {
        this.cache = cache;
        this.timeToLiveSeconds = timeToLiveSeconds;
    }

    @Override
    public String getName() {
        return cache.getName();
    }

    @Override
    public IMap getNativeCache() {
        return cache;
    }

    @Override
    public Element get(Object key) {
        Serializable o = (Serializable) this.cache.get(key);
        return (o == null)
            ? null
            : new Element() {
                @Override
                public Object key() {
                    return key;
                }

                @Override
                public Serializable value() {
                    return o;
                }
            };
    }

    @Override
    public void put(Element element) {
        int ttl = this.timeToLiveSeconds;
        if ((ttl == 0 && element.timeToLive() > 0) || (ttl > 0 && element.timeToLive() > 0 && ttl > element.timeToLive())) {
            ttl = element.timeToLive();
        }
        cache.put(element.key(), element.value(), ttl, TimeUnit.SECONDS);
    }

    @Override
    public void evict(Object key) {
        cache.remove(key);
    }

    @Override
    public void clear() {
        cache.clear();
    }
}