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The AWS Java SDK for Elastic Load Balancing module holds the client classes that are used for communicating with Elastic Load Balancing Service (API Version 2012-06-01)

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/*
 * Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"). You may not
 * use this file except in compliance with the License. A copy of the License is
 * located at
 * 
 * http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.elasticloadbalancing.waiters;

import com.amazonaws.annotation.SdkInternalApi;
import com.amazonaws.services.elasticloadbalancing.AmazonElasticLoadBalancing;
import com.amazonaws.services.elasticloadbalancing.model.*;
import com.amazonaws.waiters.*;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class AmazonElasticLoadBalancingWaiters {

    /**
     * Represents the service client
     */
    private final AmazonElasticLoadBalancing client;

    private final ExecutorService executorService = Executors
            .newFixedThreadPool(50);

    /**
     * Constructs a new AmazonElasticLoadBalancingWaiters with the given client
     * 
     * @param client
     *        Service client
     */
    @SdkInternalApi
    public AmazonElasticLoadBalancingWaiters(AmazonElasticLoadBalancing client) {
        this.client = client;
    }

    /**
     * Builds a AnyInstanceInService waiter by using custom parameters
     * waiterParameters and other parameters defined in the waiters
     * specification, and then polls until it determines whether the resource
     * entered the desired state or not, where polling criteria is bound by
     * either default polling strategy or custom polling strategy.
     */
    public Waiter anyInstanceInService() {

        return new WaiterBuilder()
                .withSdkFunction(new DescribeInstanceHealthFunction(client))
                .withAcceptors(new AnyInstanceInService.IsInServiceMatcher())
                .withDefaultPollingStrategy(
                        new PollingStrategy(new MaxAttemptsRetryStrategy(40),
                                new FixedDelayStrategy(15)))
                .withExecutorService(executorService).build();
    }

    /**
     * Builds a InstanceDeregistered waiter by using custom parameters
     * waiterParameters and other parameters defined in the waiters
     * specification, and then polls until it determines whether the resource
     * entered the desired state or not, where polling criteria is bound by
     * either default polling strategy or custom polling strategy.
     */
    public Waiter instanceDeregistered() {

        return new WaiterBuilder()
                .withSdkFunction(new DescribeInstanceHealthFunction(client))
                .withAcceptors(
                        new InstanceDeregistered.IsOutOfServiceMatcher(),
                        new InstanceDeregistered.IsInvalidInstanceMatcher())
                .withDefaultPollingStrategy(
                        new PollingStrategy(new MaxAttemptsRetryStrategy(40),
                                new FixedDelayStrategy(15)))
                .withExecutorService(executorService).build();
    }

    /**
     * Builds a InstanceInService waiter by using custom parameters
     * waiterParameters and other parameters defined in the waiters
     * specification, and then polls until it determines whether the resource
     * entered the desired state or not, where polling criteria is bound by
     * either default polling strategy or custom polling strategy.
     */
    public Waiter instanceInService() {

        return new WaiterBuilder()
                .withSdkFunction(new DescribeInstanceHealthFunction(client))
                .withAcceptors(new InstanceInService.IsInServiceMatcher())
                .withDefaultPollingStrategy(
                        new PollingStrategy(new MaxAttemptsRetryStrategy(40),
                                new FixedDelayStrategy(15)))
                .withExecutorService(executorService).build();
    }

}