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package javax.ws.rs.client;
import java.net.URL;
import java.security.KeyStore;
import javax.ws.rs.core.Configurable;
import javax.ws.rs.core.Configuration;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
/**
* Main entry point to the client API used to bootstrap {@link javax.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 =
"javax.ws.rs.client.ClientBuilder";
/**
* Default client builder implementation class name.
*/
private static final String JAXRS_DEFAULT_CLIENT_BUILDER =
"org.glassfish.jersey.client.JerseyClientBuilder";
/**
* 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,
JAXRS_DEFAULT_CLIENT_BUILDER);
if (!(delegate instanceof ClientBuilder)) {
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);
throw new LinkageError("ClassCastException: attempting to cast"
+ delegate.getClass().getClassLoader().getResource(classnameAsResource)
+ " to " + targetTypeURL);
}
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);
/**
* Build a new client instance using all the configuration previously specified
* in this client builder.
*
* @return a new client instance.
*/
public abstract Client build();
}