springfox.documentation.schema.CachingModelProvider.java Source code

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Here is the source code for springfox.documentation.schema.CachingModelProvider.java

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/*
 *
 *  Copyright 2015 the original author or authors.
 *
 *  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 springfox.documentation.schema;

import com.google.common.base.Optional;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import springfox.documentation.spi.schema.contexts.ModelContext;

import java.util.Map;
import java.util.concurrent.TimeUnit;

@Component
@Qualifier("cachedModels")
public class CachingModelProvider implements ModelProvider {
    private static final Logger LOGGER = LoggerFactory.getLogger(CachingModelProvider.class);
    private final LoadingCache<ModelContext, Optional<Model>> cache;
    private final ModelProvider delegate;

    @Autowired
    public CachingModelProvider(@Qualifier("default") final ModelProvider delegate) {
        this.delegate = delegate;
        cache = CacheBuilder.newBuilder().maximumSize(1000).expireAfterWrite(24, TimeUnit.HOURS)
                .build(new CacheLoader<ModelContext, Optional<Model>>() {
                    public Optional<Model> load(ModelContext key) {
                        return delegate.modelFor(key);
                    }
                });
    }

    @Override
    public Optional<Model> modelFor(ModelContext modelContext) {
        try {
            return cache.get(modelContext);
        } catch (Exception e) {
            LOGGER.warn("Failed to get the model for -> {}. {}", modelContext.description(), e.getMessage());
            return Optional.absent();
        }
    }

    @Override
    public Map<String, Model> dependencies(ModelContext modelContext) {
        return delegate.dependencies(modelContext);
    }
}