io.gravitee.resource.cache.NodeCacheResource 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 © 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;

import io.gravitee.common.utils.UUID;
import io.gravitee.gateway.reactive.api.context.GenericExecutionContext;
import io.gravitee.gateway.reactive.api.context.base.BaseExecutionContext;
import io.gravitee.node.api.cache.CacheConfiguration;
import io.gravitee.node.api.cache.CacheManager;
import io.gravitee.resource.cache.api.Cache;
import io.gravitee.resource.cache.configuration.CacheResourceConfiguration;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class NodeCacheResource
    extends io.gravitee.resource.cache.api.CacheResource
    implements ApplicationContextAware {

    private static final String MAP_PREFIX = "cache-resources" + CacheResourceConfiguration.KEY_SEPARATOR;

    private ApplicationContext applicationContext;

    private String cacheId;
    private CacheManager cacheManager;
    private Cache cache;

    @Override
    protected void doStart() throws Exception {
        super.doStart();

        final CacheResourceConfiguration configuration = configuration();
        this.cacheId = MAP_PREFIX + "gravitee" + CacheResourceConfiguration.KEY_SEPARATOR + UUID.random().toString();
        this.cacheManager = this.applicationContext.getBean(CacheManager.class);

        buildCache();
    }

    protected void buildCache() {
        CacheConfiguration configuration = CacheConfiguration
            .builder()
            .distributed(true)
            .maxSize(configuration().getMaxEntriesLocalHeap())
            .timeToLiveInMs(TimeUnit.MILLISECONDS.convert(configuration().getTimeToLiveSeconds(), TimeUnit.SECONDS))
            .timeToIdleInMs(TimeUnit.MILLISECONDS.convert(configuration().getTimeToLiveSeconds(), TimeUnit.SECONDS))
            .build();
        this.cache =
            new NodeCacheDelegate(cacheId, configuration().getTimeToLiveSeconds(), cacheManager.getOrCreateCache(cacheId, configuration));
    }

    @Override
    protected void doStop() throws Exception {
        super.doStop();
        if (this.cacheManager != null) {
            this.cacheManager.destroy(this.cacheId);
            if (this.cache != null) {
                this.cache.clear();
                this.cache = null;
            }
        }
    }

    @Override
    public io.gravitee.resource.cache.api.Cache getCache(final GenericExecutionContext ctx) {
        return this.cache;
    }

    @Override
    public Cache getCache(BaseExecutionContext ctx) {
        return this.cache;
    }

    @Override
    public io.gravitee.resource.cache.api.Cache getCache(final io.gravitee.gateway.api.ExecutionContext ctx) {
        return this.cache;
    }

    @Override
    public void setApplicationContext(final ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }
}