CachingServiceSelectorFactory.java

/*
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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.airlift.discovery.client;

import javax.inject.Inject;

import java.util.concurrent.ScheduledExecutorService;

import static java.util.Objects.requireNonNull;

public class CachingServiceSelectorFactory implements ServiceSelectorFactory
{
    private final DiscoveryLookupClient lookupClient;
    private final ScheduledExecutorService executor;

    @Inject
    public CachingServiceSelectorFactory(DiscoveryLookupClient lookupClient, @ForDiscoveryClient ScheduledExecutorService executor)
    {
        requireNonNull(lookupClient, "client is null");
        requireNonNull(executor, "executor is null");
        this.lookupClient = lookupClient;
        this.executor = executor;
    }

    public ServiceSelector createServiceSelector(String type, ServiceSelectorConfig selectorConfig)
    {
        requireNonNull(type, "type is null");
        requireNonNull(selectorConfig, "selectorConfig is null");

        CachingServiceSelector serviceSelector = new CachingServiceSelector(type, selectorConfig, lookupClient, executor);
        serviceSelector.start();

        return serviceSelector;
    }
}