io.curly.commons.web.rest.TraversonFactory.java Source code

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Here is the source code for io.curly.commons.web.rest.TraversonFactory.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 io.curly.commons.web.rest;

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.hateoas.MediaTypes;
import org.springframework.hateoas.client.Traverson;

/**
 * @author Joo Pedro Evangelista
 * @since 09/03/15
 */
public class TraversonFactory {

    private final LoadBalancerClient loadBalancerClient;

    public TraversonFactory(LoadBalancerClient loadBalancerClient) {
        this.loadBalancerClient = loadBalancerClient;
    }

    public Traverson create(String serviceId) {
        ServiceInstance instance = loadBalancerClient.choose(serviceId);
        if (instance != null)
            return new Traverson(instance.getUri(), MediaTypes.HAL_JSON);
        else
            throw new IllegalStateException("Instance is null!");
    }
}