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/*
* 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 javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import java.net.URL;
import java.security.AccessController;
import java.security.KeyStore;
import java.security.PrivilegedAction;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import jakarta.ws.rs.ProcessingException;
import jakarta.ws.rs.core.Configurable;
import jakarta.ws.rs.core.Configuration;
/**
* Main entry point to the client API used to bootstrap {@link jakarta.ws.rs.client.Client} instances.
*
* @author Marek Potociar
* @since 2.0
*/
public abstract class ClientBuilder implements Configurable {
/**
* Name of the property identifying the {@link ClientBuilder} implementation to be returned from
* {@link ClientBuilder#newBuilder()}.
*/
public static final String JAXRS_DEFAULT_CLIENT_BUILDER_PROPERTY = "jakarta.ws.rs.client.ClientBuilder";
/**
* Allows custom implementations to extend the {@code ClientBuilder} class.
*/
protected ClientBuilder() {
}
/**
* Create a new {@code ClientBuilder} instance using the default client builder implementation class provided by the
* JAX-RS implementation provider.
*
* @return new client builder instance.
*/
public static ClientBuilder newBuilder() {
try {
Object delegate = FactoryFinder.find(JAXRS_DEFAULT_CLIENT_BUILDER_PROPERTY, ClientBuilder.class);
if (!(delegate instanceof ClientBuilder)) {
final CreateErrorMessageAction action = new CreateErrorMessageAction(delegate);
final String errorMessage;
if (System.getSecurityManager() == null) {
errorMessage = action.run();
} else {
errorMessage = AccessController.doPrivileged(action);
}
throw new LinkageError(errorMessage);
}
return (ClientBuilder) delegate;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
/**
* Create a new {@link Client} instance using the default client builder implementation class provided by the JAX-RS
* implementation provider.
*
* @return new client instance.
*/
public static Client newClient() {
return newBuilder().build();
}
/**
* Create a new custom-configured {@link Client} instance using the default client builder implementation class provided
* by the JAX-RS implementation provider.
*
* @param configuration data used to provide initial configuration for the new client instance.
* @return new configured client instance.
*/
public static Client newClient(final Configuration configuration) {
return newBuilder().withConfig(configuration).build();
}
/**
* Set the internal configuration state to an externally provided configuration state.
*
* @param config external configuration state to replace the configuration of this configurable instance.
* @return the updated client builder instance.
*/
public abstract ClientBuilder withConfig(Configuration config);
/**
* Set the SSL context that will be used when creating secured transport connections to server endpoints from
* {@link WebTarget web targets} created by the client instance that is using this SSL context. The SSL context is
* expected to have all the security infrastructure initialized, including the key and trust managers.
*
* Setting a SSL context instance resets any {@link #keyStore(java.security.KeyStore, char[]) key store} or
* {@link #trustStore(java.security.KeyStore) trust store} values previously specified.
*
*
* @param sslContext secure socket protocol implementation which acts as a factory for secure socket factories or
* {@link javax.net.ssl.SSLEngine SSL engines}. Must not be {@code null}.
* @return an updated client builder instance.
* @throws NullPointerException in case the {@code sslContext} parameter is {@code null}.
* @see #keyStore(java.security.KeyStore, char[])
* @see #keyStore(java.security.KeyStore, String)
* @see #trustStore
*/
public abstract ClientBuilder sslContext(final SSLContext sslContext);
/**
* Set the client-side key store. Key store contains client's private keys, and the certificates with their
* corresponding public keys.
*
* Setting a key store instance resets any {@link #sslContext(javax.net.ssl.SSLContext) SSL context instance} value
* previously specified.
*
*
* Note that a custom key store is only required if you want to enable a custom setup of a 2-way SSL connections (client
* certificate authentication).
*
*
* @param keyStore client-side key store. Must not be {@code null}.
* @param password client key password. Must not be {@code null}.
* @return an updated client builder instance.
* @throws NullPointerException in case any of the supplied parameters is {@code null}.
* @see #sslContext
* @see #keyStore(java.security.KeyStore, String)
* @see #trustStore
*/
public abstract ClientBuilder keyStore(final KeyStore keyStore, final char[] password);
/**
* Set the client-side key store. Key store contains client's private keys, and the certificates with their
* corresponding public keys.
*
* Setting a key store instance resets any {@link #sslContext(javax.net.ssl.SSLContext) SSL context instance} value
* previously specified.
*
*
* Note that for improved security of working with password data and avoid storing passwords in Java string objects, the
* {@link #keyStore(java.security.KeyStore, char[])} version of the method can be utilized. Also note that a custom key
* store is only required if you want to enable a custom setup of a 2-way SSL connections (client certificate
* authentication).
*
*
* @param keyStore client-side key store. Must not be {@code null}.
* @param password client key password. Must not be {@code null}.
* @return an updated client builder instance.
* @throws NullPointerException in case any of the supplied parameters is {@code null}.
* @see #sslContext
* @see #keyStore(java.security.KeyStore, char[])
* @see #trustStore
*/
public ClientBuilder keyStore(final KeyStore keyStore, final String password) {
return keyStore(keyStore, password.toCharArray());
}
/**
* Set the client-side trust store. Trust store is expected to contain certificates from other parties the client is you
* expect to communicate with, or from Certificate Authorities that are trusted to identify other parties.
*
* Setting a trust store instance resets any {@link #sslContext(javax.net.ssl.SSLContext) SSL context instance} value
* previously specified.
*
*
* In case a custom trust store or custom SSL context is not specified, the trust management will be configured to use
* the default Java runtime settings.
*
*
* @param trustStore client-side trust store. Must not be {@code null}.
* @return an updated client builder instance.
* @throws NullPointerException in case the supplied trust store parameter is {@code null}.
* @see #sslContext
* @see #keyStore(java.security.KeyStore, char[])
* @see #keyStore(java.security.KeyStore, String)
*/
public abstract ClientBuilder trustStore(final KeyStore trustStore);
/**
* Set the hostname verifier to be used by the client to verify the endpoint's hostname against it's identification
* information.
*
* @param verifier hostname verifier.
* @return an updated client builder instance.
*/
public abstract ClientBuilder hostnameVerifier(final HostnameVerifier verifier);
/**
* Set the client-side {@link ExecutorService}.
*
* Provided executor service will be used for executing asynchronous tasks.
*
* When running in a Jakarta EE container, implementations are required to use the container-managed executor service by
* default. In Java SE, the default is implementation-specific. In either case, calling this method will override the
* default.
*
* @param executorService executor service to be used for async invocations.
* @return an updated client builder instance.
* @see Invocation.Builder#async()
* @see Invocation.Builder#rx()
* @see RxInvokerProvider#getRxInvoker(SyncInvoker, ExecutorService)
* @since 2.1
*/
public abstract ClientBuilder executorService(final ExecutorService executorService);
/**
* Set the client-side {@link ScheduledExecutorService}.
*
* Provided executor service will be used for executing scheduled asynchronous tasks.
*
* When running in a Jakarta EE container, implementations are required to use the container-managed scheduled executor
* service by default. In Java SE the default is implementation-specific. In either case, calling this method will
* override the default.
*
* @param scheduledExecutorService executor service to be used for scheduled async invocations.
* @return an updated client builder instance.
* @see jakarta.ws.rs.sse.SseEventSource.Builder#reconnectingEvery(long, TimeUnit)
* @since 2.1
*/
public abstract ClientBuilder scheduledExecutorService(final ScheduledExecutorService scheduledExecutorService);
/**
* Set the connect timeout.
*
* Value {@code 0} represents infinity. Negative values are not allowed.
*
* @param timeout the maximum time to wait.
* @param unit the time unit of the timeout argument.
* @return an updated client builder instance.
* @throws IllegalArgumentException when the value is negative.
* @since 2.1
*/
public abstract ClientBuilder connectTimeout(long timeout, TimeUnit unit);
/**
* Set the read timeout.
*
* The value is the timeout to read a response. If the server doesn't respond within the defined timeframe,
* {@link ProcessingException} is thrown with {@link TimeoutException} as a cause.
*
* Value {@code 0} represents infinity. Negative values are not allowed.
*
* @param timeout the maximum time to wait.
* @param unit the time unit of the timeout argument.
* @return an updated client builder instance.
* @throws IllegalArgumentException when the value is negative.
* @since 2.1
*/
public abstract ClientBuilder readTimeout(long timeout, TimeUnit unit);
/**
* Build a new client instance using all the configuration previously specified in this client builder.
*
* @return a new client instance.
*/
public abstract Client build();
private static final class CreateErrorMessageAction implements PrivilegedAction {
private final Object delegate;
private CreateErrorMessageAction(final Object delegate) {
this.delegate = delegate;
}
@Override
public String run() {
Class pClass = ClientBuilder.class;
String classnameAsResource = pClass.getName().replace('.', '/') + ".class";
ClassLoader loader = pClass.getClassLoader();
if (loader == null) {
loader = ClassLoader.getSystemClassLoader();
}
URL targetTypeURL = loader.getResource(classnameAsResource);
return "ClassCastException: attempting to cast"
+ delegate.getClass().getClassLoader().getResource(classnameAsResource)
+ " to " + targetTypeURL;
}
}
}