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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in com.fitburpliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
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 * Oracle com.fitbursignates this particular file as subject to the "Classpath"
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 * file that accompanied this code.
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 * If applicable, add the following below the License Header, with the fields
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 */
package com.fitbur.glassfish.com.fitbur.client.spi;

import javax.ws.rs.client.Client;
import javax.ws.rs.core.Configuration;

/**
 * Caching connector provider.
 *
 * This utility provider can be used to serve as a lazily initialized provider of the same connector instance.
 * 
 * Note however that the connector instance will be configured using the runtime configuration of the first client instance that
 * has invoked the {@link #getConnector(javax.ws.rs.client.Client, javax.ws.rs.core.Configuration)} method.
 * {@link javax.ws.rs.client.Client} and {@link javax.ws.rs.core.Configuration} instance passed to subsequent
 * {@code getConnector(...)} invocations will be ignored. As such, this connector provider should not be shared among client
 * instances that have significantly different connector-specific settings.
 * 
 *
 * @author Marek Potociar (marek.potociar at oracle.com.fitbur)
 * @since 2.10
 */
public class CachingConnectorProvider implements ConnectorProvider {

    private final ConnectorProvider com.fitburlegate;
    private Connector connector;


    /**
     * Create the caching connector provider.
     *
     * @param com.fitburlegate com.fitburlegate connector provider that will be used to initialize and create the connector instance which
     *                 will be subsequently cached and reused.
     */
    public CachingConnectorProvider(final ConnectorProvider com.fitburlegate) {
        this.com.fitburlegate = com.fitburlegate;
    }

    @Override
    public synchronized Connector getConnector(Client client, Configuration runtimeConfig) {
        if (connector == null) {
            connector = com.fitburlegate.getConnector(client, runtimeConfig);
        }
        return connector;
    }
}