javax.ws.rs.client

Interface Invocation

public interface Invocation

A client request invocation. An invocation is a request that has been prepared and is ready for execution. Invocations provide a generic (command) interface that enables a separation of concerns between the creator and the submitter. In particular, the submitter does not need to know how the invocation was prepared, but only how it should be executed (synchronously or asynchronously) and when.

Author:

Marek Potociar, Santiago Pericas-Geertsen

See Also:

Invocation.Builder

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Invocation.Builder A client request invocation builder.

Method Summary

Modifier and Type	Method and Description
Response	invoke() Synchronously invoke the request and receive a response back.
<T> T	invoke(Class<T> responseType) Synchronously invoke the request and receive a response of the specified type back.
<T> T	invoke(GenericType<T> responseType) Synchronously invoke the request and receive a response of the specified generic type back.
Invocation	property(String name, Object value) Set a new property in the context of a request represented by this invocation.
Future<Response>	submit() Submit the request for an asynchronous invocation and receive a future response back.
<T> Future<T>	submit(Class<T> responseType) Submit the request for an asynchronous invocation and receive a future response of the specified type back.
<T> Future<T>	submit(GenericType<T> responseType) Submit the request for an asynchronous invocation and receive a future response of the specified generic type back.
<T> Future<T>	submit(InvocationCallback<T> callback) Submit the request for an asynchronous invocation and register an InvocationCallback to process the future result of the invocation.

Method Detail

property

Invocation property(String name,
                    Object value)

Set a new property in the context of a request represented by this invocation.

The property is available for a later retrieval via ClientRequestContext.getProperty(String) or InterceptorContext.getProperty(String). If a property with a given name is already set in the request context, the existing value of the property will be updated. Setting a null value into a property effectively removes the property from the request property bag.

Parameters:

name - property name.

value - (new) property value. null value removes the property with the given name.

Returns:

the updated invocation.

See Also:

Invocation.Builder.property(String, Object)

invoke

Response invoke()

Synchronously invoke the request and receive a response back.

Returns:

response object as a result of the request invocation.

Throws:

ResponseProcessingException - in case processing of a received HTTP response fails (e.g. in a filter or during conversion of the response entity data to an instance of a particular Java type).

ProcessingException - in case the request processing or subsequent I/O operation fails.

invoke

<T> T invoke(Class<T> responseType)

Synchronously invoke the request and receive a response of the specified type back.

Type Parameters:

T - response type

Parameters:

responseType - Java type the response should be converted into.

Returns:

response object of the specified type as a result of the request invocation.

Throws:

ResponseProcessingException - in case processing of a received HTTP response fails (e.g. in a filter or during conversion of the response entity data to an instance of a particular Java type).

ProcessingException - in case the request processing or subsequent I/O operation fails.

WebApplicationException - in case the response status code of the response returned by the server is not successful and the specified response type is not Response.

invoke

<T> T invoke(GenericType<T> responseType)

Synchronously invoke the request and receive a response of the specified generic type back.

Type Parameters:

T - generic response type

Parameters:

responseType - type literal representing a generic Java type the response should be converted into.

Returns:

response object of the specified generic type as a result of the request invocation.

Throws:

ResponseProcessingException - in case processing of a received HTTP response fails (e.g. in a filter or during conversion of the response entity data to an instance of a particular Java type).

ProcessingException - in case the request processing or subsequent I/O operation fails.

WebApplicationException - in case the response status code of the response returned by the server is not successful.

submit

Future<Response> submit()

Submit the request for an asynchronous invocation and receive a future response back.

Note that calling the Future.get() method on the returned Future instance may throw an ExecutionException that wraps a ProcessingException thrown in case of an invocation processing failure. In case a processing of a properly received response fails, the wrapped processing exception will be of ResponseProcessingException type and will contain the Response instance whose processing has failed.

Returns:

future response object as a result of the request invocation.

submit

<T> Future<T> submit(Class<T> responseType)

Submit the request for an asynchronous invocation and receive a future response of the specified type back.

Note that calling the Future.get() method on the returned Future instance may throw an ExecutionException that wraps either a ProcessingException thrown in case of an invocation processing failure or a WebApplicationException or one of its subclasses thrown in case the received response status code is not successful and the specified response type is not Response. In case a processing of a properly received response fails, the wrapped processing exception will be of ResponseProcessingException type and will contain the Response instance whose processing has failed.

Type Parameters:

T - response type

Parameters:

responseType - Java type the response should be converted into.

Returns:

future response object of the specified type as a result of the request invocation.

submit

<T> Future<T> submit(GenericType<T> responseType)

Submit the request for an asynchronous invocation and receive a future response of the specified generic type back.

Note that calling the Future.get() method on the returned Future instance may throw an ExecutionException that wraps either a ProcessingException thrown in case of an invocation processing failure or a WebApplicationException or one of its subclasses thrown in case the received response status code is not successful and the specified response type is not Response. In case a processing of a properly received response fails, the wrapped processing exception will be of ResponseProcessingException type and will contain the Response instance whose processing has failed.

Type Parameters:

T - generic response type

Parameters:

responseType - type literal representing a generic Java type the response should be converted into.

Returns:

future response object of the specified generic type as a result of the request invocation.

submit

<T> Future<T> submit(InvocationCallback<T> callback)

Submit the request for an asynchronous invocation and register an InvocationCallback to process the future result of the invocation.

Note that calling the Future.get() method on the returned Future instance may throw an ExecutionException that wraps either a ProcessingException thrown in case of an invocation processing failure or a WebApplicationException or one of its subclasses thrown in case the received response status code is not successful and the generic type of the supplied response callback is not Response. In case a processing of a properly received response fails, the wrapped processing exception will be of ResponseProcessingException type and will contain the Response instance whose processing has failed.

Type Parameters:

T - response type

Parameters:

callback - invocation callback for asynchronous processing of the request invocation result.

Returns:

future response object of the specified type as a result of the request invocation.