net.kuujo.copycat.vertx.impl.CopycatAsyncMultiMap.java Source code

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Here is the source code for net.kuujo.copycat.vertx.impl.CopycatAsyncMultiMap.java

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/*
 * Copyright 2014 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 net.kuujo.copycat.vertx.impl;

import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.spi.cluster.AsyncMultiMap;
import io.vertx.core.spi.cluster.ChoosableIterable;

import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Copycat asynchronous multimap.
 *
 * @author <a href="http://github.com/kuujo">Jordan Halterman</a>
 */
public class CopycatAsyncMultiMap<K, V> implements AsyncMultiMap<K, V> {
    private final net.kuujo.copycat.collections.AsyncMultiMap<K, V> map;

    public CopycatAsyncMultiMap(net.kuujo.copycat.collections.AsyncMultiMap<K, V> map) {
        this.map = map;
    }

    @Override
    public void add(K k, V v, Handler<AsyncResult<Void>> resultHandler) {
        map.put(k, v).whenComplete((result, error) -> {
            if (error == null) {
                Future.<Void>succeededFuture().setHandler(resultHandler);
            } else {
                Future.<Void>failedFuture(error).setHandler(resultHandler);
            }
        });
    }

    @Override
    public void get(K k, Handler<AsyncResult<ChoosableIterable<V>>> resultHandler) {
        map.get(k).whenComplete((result, error) -> {
            if (error == null) {
                Future.<ChoosableIterable<V>>succeededFuture(new ChoosableCollection<V>(result))
                        .setHandler(resultHandler);
            } else {
                Future.<ChoosableIterable<V>>failedFuture(error).setHandler(resultHandler);
            }
        });
    }

    @Override
    public void remove(K k, V v, Handler<AsyncResult<Boolean>> resultHandler) {
        map.remove(k, v).whenComplete((result, error) -> {
            if (error == null) {
                Future.succeededFuture(result).setHandler(resultHandler);
            } else {
                Future.<Boolean>failedFuture(error).setHandler(resultHandler);
            }
        });
    }

    @Override
    public void removeAllForValue(V v, Handler<AsyncResult<Void>> resultHandler) {
        map.entrySet().whenComplete((result, error) -> {
            if (error == null) {
                AtomicInteger counter = new AtomicInteger();
                for (Map.Entry<K, V> entry : result) {
                    map.remove(entry.getKey(), entry.getValue()).whenComplete((removeResult, removeError) -> {
                        if (removeError == null) {
                            if (counter.incrementAndGet() == result.size()) {
                                Future.<Void>succeededFuture().setHandler(resultHandler);
                            }
                        } else {
                            Future.<Void>failedFuture(removeError).setHandler(resultHandler);
                        }
                    });
                }
            } else {
                Future.<Void>failedFuture(error).setHandler(resultHandler);
            }
        });
    }

}