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• Client.java

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jakarta.ws.rs.client.Client Maven / Gradle / Ivy

/*
 * Copyright (c) 2011, 2019 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package jakarta.ws.rs.client;

import java.net.URI;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;

import jakarta.ws.rs.core.Configurable;
import jakarta.ws.rs.core.Link;
import jakarta.ws.rs.core.UriBuilder;

/**
 * 

 * Client is the main entry point to the fluent API used to build and execute client requests in order to consume
 * responses returned.
 * 
 * Clients are heavy-weight objects that manage the client-side communication infrastructure. Initialization as well as
 * disposal of a {@code Client} instance may be a rather expensive operation. It is therefore advised to construct only
 * a small number of {@code Client} instances in the application. Client instances must be {@link #close() properly
 * closed} before being disposed to avoid leaking resources.
 *
 * @author Marek Potociar
 * @see jakarta.ws.rs.core.Configurable
 * @since 2.0
 */
public interface Client extends Configurable {

    /**
     * 

     * Close client instance and all it's associated resources. Subsequent calls have no effect and are ignored. Once the
     * client is closed, invoking any other method on the client instance would result in an {@link IllegalStateException}
     * being thrown.
     * 
     * Calling this method effectively invalidates all {@link WebTarget resource targets} produced by the client instance.
     * Invoking any method on such targets once the client is closed would result in an {@link IllegalStateException} being
     * thrown.
     */
    public void close();

    /**
     * Build a new web resource target.
     *
     * @param uri web resource URI. May contain template parameters. Must not be {@code null}.
     * @return web resource target bound to the provided URI.
     * @throws IllegalArgumentException in case the supplied string is not a valid URI template.
     * @throws NullPointerException in case the supplied argument is {@code null}.
     */
    public WebTarget target(String uri);

    /**
     * Build a new web resource target.
     *
     * @param uri web resource URI. Must not be {@code null}.
     * @return web resource target bound to the provided URI.
     * @throws NullPointerException in case the supplied argument is {@code null}.
     */
    public WebTarget target(URI uri);

    /**
     * Build a new web resource target.
     *
     * @param uriBuilder web resource URI represented as URI builder. Must not be {@code null}.
     * @return web resource target bound to the provided URI.
     * @throws NullPointerException in case the supplied argument is {@code null}.
     */
    public WebTarget target(UriBuilder uriBuilder);

    /**
     * Build a new web resource target.
     *
     * @param link link to a web resource. Must not be {@code null}.
     * @return web resource target bound to the linked web resource.
     * @throws NullPointerException in case the supplied argument is {@code null}.
     */
    public WebTarget target(Link link);

    /**
     * 

     * Build an invocation builder from a link. It uses the URI and the type of the link to initialize the invocation
     * builder. The type is used as the initial value for the HTTP Accept header, if present.
     * 
     *
     * @param link link to build invocation from. Must not be {@code null}.
     * @return newly created invocation builder.
     * @throws NullPointerException in case link is {@code null}.
     */
    public Invocation.Builder invocation(Link link);

    /**
     * Get the SSL context configured to be used with the current client run-time.
     *
     * @return SSL context configured to be used with the current client run-time.
     */
    public SSLContext getSslContext();

    /**
     * Get the hostname verifier configured in the client or {@code null} in case no hostname verifier has been configured.
     *
     * @return client hostname verifier or {@code null} if not set.
     */
    public HostnameVerifier getHostnameVerifier();
}