/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 AT&T Intellectual Property. 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.
 * 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.
 * ============LICENSE_END====================================================
 *
 */

package org.onap.aaf.cadi.client;

import java.net.ConnectException;

import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.cadi.Locator;
import org.onap.aaf.misc.env.APIException;

/**
 *
 * @author Jonathan
 *
 * @param <RT>
 * @param <RET>
 */
public abstract class Retryable<RET> {
    // be able to hold state for consistent Connections.  Not required for all connection types.
    public Rcli<?> lastClient;
    private Locator.Item item;

    public Retryable() {
        lastClient = null;
        item = null;
    }

    public Retryable(Retryable<?> ret) {
        lastClient = ret.lastClient;
        item = ret.item;
    }

    public Locator.Item item(Locator.Item item) {
        lastClient = null;
        this.item = item;
        return item;
    }
    public Locator.Item item() {
        return item;
    }

    public abstract RET code(Rcli<?> client) throws CadiException, ConnectException, APIException;

    /**
     * Note, Retryable is tightly coupled to the Client Utilizing.  It will not be the wrong type.
     * @return
     */
    @SuppressWarnings("unchecked")
    public <CLIENT> Rcli<CLIENT> lastClient() {
        return (Rcli<CLIENT>)lastClient;
    }
}