/*
* Copyright 2016 The Simple File Server 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 org.sfs.elasticsearch;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.sfs.Server;
import org.sfs.VertxContext;
import org.sfs.elasticsearch.account.LoadAccount;
import org.sfs.rx.Defer;
import org.sfs.vo.PersistentAccount;
import rx.Observable;
public class CachedAccount {
private final VertxContext<Server> vertxContext;
private final Cache<String, PersistentAccount> cache =
CacheBuilder.newBuilder()
.maximumSize(100)
.build();
public CachedAccount(VertxContext<Server> vertxContext) {
this.vertxContext = vertxContext;
}
public Observable<PersistentAccount> get(String accountId) {
return Observable.defer(() -> {
final PersistentAccount persistentAccount = cache.getIfPresent(accountId);
if (persistentAccount == null) {
return Defer.just(accountId)
.flatMap(new LoadAccount(vertxContext))
.map(oPersistentAccount -> {
if (oPersistentAccount.isPresent()) {
cache.put(accountId, oPersistentAccount.get());
}
return oPersistentAccount.get();
});
} else {
return Defer.just(persistentAccount);
}
});
}
}