SPR-7494 - Introduce interceptors for RestTemplate

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@3930 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.web/src/main/java/org/springframework/http/client/ClientHttpRequestExecution.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+
+import org.springframework.http.HttpRequest;
+
+/**
+ * Represents the context of a client-side HTTP request execution.
+ *
+ * <p>Used to invoke the next interceptor in the interceptor chain, or - if the calling interceptor is last - execute
+ * the request itself.
+ *
+ * @author Arjen Poutsma
+ * @see ClientHttpRequestInterceptor
+ * @since 3.1
+ */
+public interface ClientHttpRequestExecution {
+
+	/**
+	 * Execute the request with the given request attributes and body, and return the response.
+	 *
+	 * @param request the request, containing method, URI, and headers
+	 * @param body the body of the request to execute
+	 * @return the response
+	 * @throws IOException in case of I/O errors
+	 */
+	ClientHttpResponse execute(HttpRequest request, byte[] body) throws IOException;
+}

org.springframework.web/src/main/java/org/springframework/http/client/ClientHttpRequestInterceptor.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+
+import org.springframework.http.HttpRequest;
+
+/**
+ * Intercepts client-side HTTP requests. Implementations of this interface can be {@linkplain
+ * org.springframework.web.client.RestTemplate#setInterceptors(ClientHttpRequestInterceptor[]) registered} with the
+ * {@link org.springframework.web.client.RestTemplate RestTemplate}, as to modify the outgoing {@link ClientHttpRequest}
+ * and/or the incoming {@link ClientHttpResponse}.
+ *
+ * <p>The main entry point for interceptors is {@link #intercept(HttpRequest, byte[], ClientHttpRequestExecution)}.
+ *
+ * @author Arjen Poutsma
+ * @since 3.1
+ */
+public interface ClientHttpRequestInterceptor {
+
+	/**
+	 * Intercept the given request, and return a response. The given {@link ClientHttpRequestExecution} allows
+	 * the interceptor to pass on the request and response to the next entity in the chain.
+	 *
+	 * <p>A typical implementation of this method would follow the following pattern:
+	 * <ol>
+	 * <li>Examine the {@linkplain HttpRequest request} and body</li>
+	 * <li>Optionally {@linkplain org.springframework.http.client.support.HttpRequestWrapper wrap} the request to filter HTTP attributes.</li>
+	 * <li>Optionally modify the body of the request.</li>
+	 * <li><strong>Either</strong>
+	 * <ul>
+	 * <li>execute the request using {@link ClientHttpRequestExecution#execute(org.springframework.http.HttpRequest, byte[])},</li>
+	 * <strong>or</strong>
+	 * <li>do not execute the request to block the execution altogether.</li>
+	 * </ul>
+	 * <li>Optionally wrap the response to filter HTTP attributes.</li>
+	 * </ol>
+	 *
+	 * @param request the request, containing method, URI, and headers
+	 * @param body the body of the request
+	 * @param execution the request execution
+	 * @return the response
+	 * @throws IOException in case of I/O errors
+	 */
+	ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+			throws IOException;
+
+}

org.springframework.web/src/main/java/org/springframework/http/client/InterceptingClientHttpRequest.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+import java.net.URI;
+import java.util.Arrays;
+import java.util.Iterator;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpRequest;
+import org.springframework.util.FileCopyUtils;
+
+/**
+ * Wrapper for a {@link ClientHttpRequest} that has support for {@link ClientHttpRequestInterceptor}s.
+ *
+ * @author Arjen Poutsma
+ * @since 3.1
+ */
+class InterceptingClientHttpRequest extends AbstractBufferingClientHttpRequest {
+
+	private final ClientHttpRequestFactory requestFactory;
+
+	private final ClientHttpRequestInterceptor[] interceptors;
+
+	private HttpMethod method;
+
+	private URI uri;
+
+	protected InterceptingClientHttpRequest(ClientHttpRequestFactory requestFactory,
+			ClientHttpRequestInterceptor[] interceptors,
+			URI uri,
+			HttpMethod method) {
+		this.requestFactory = requestFactory;
+		this.interceptors = interceptors;
+		this.method = method;
+		this.uri = uri;
+	}
+
+	public HttpMethod getMethod() {
+		return method;
+	}
+
+	public URI getURI() {
+		return uri;
+	}
+
+	@Override
+	protected final ClientHttpResponse executeInternal(HttpHeaders headers, byte[] bufferedOutput) throws IOException {
+		RequestExecution requestExecution = new RequestExecution();
+		
+		return requestExecution.execute(this, bufferedOutput);
+	}
+
+	private class RequestExecution implements ClientHttpRequestExecution {
+
+		private final Iterator<ClientHttpRequestInterceptor> iterator;
+
+		private RequestExecution() {
+			this.iterator = Arrays.asList(interceptors).iterator();
+		}
+
+		public ClientHttpResponse execute(HttpRequest request, byte[] body) throws IOException {
+			if (iterator.hasNext()) {
+				ClientHttpRequestInterceptor nextInterceptor = iterator.next();
+				return nextInterceptor.intercept(request, body, this);
+			}
+			else {
+				ClientHttpRequest delegate = requestFactory.createRequest(request.getURI(), request.getMethod());
+
+				delegate.getHeaders().putAll(request.getHeaders());
+
+				if (body.length > 0) {
+					FileCopyUtils.copy(body, delegate.getBody());
+				}
+				return delegate.execute();
+			}
+		}
+	}
+
+}

org.springframework.web/src/main/java/org/springframework/http/client/InterceptingClientHttpRequestFactory.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+import java.net.URI;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.util.Assert;
+
+/**
+ * Wrapper for a {@link ClientHttpRequestFactory} that has support for {@link ClientHttpRequestInterceptor}s.
+ *
+ * @author Arjen Poutsma
+ * @since 3.1
+ */
+public class InterceptingClientHttpRequestFactory implements ClientHttpRequestFactory {
+
+	private final ClientHttpRequestFactory requestFactory;
+
+	private final ClientHttpRequestInterceptor[] interceptors;
+
+	/**
+	 * Creates a new instance of the {@code InterceptingClientHttpRequestFactory} with the given parameters.
+	 *
+	 * @param requestFactory the request factory to wrap
+	 * @param interceptors the interceptors that are to be applied. Can be {@code null}.
+	 */
+	public InterceptingClientHttpRequestFactory(ClientHttpRequestFactory requestFactory,
+			ClientHttpRequestInterceptor[] interceptors) {
+		Assert.notNull(requestFactory, "'requestFactory' must not be null");
+		this.requestFactory = requestFactory;
+		this.interceptors = interceptors != null ? interceptors : new ClientHttpRequestInterceptor[0];
+	}
+
+	public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+		return new InterceptingClientHttpRequest(requestFactory, interceptors, uri, httpMethod);
+	}
+}

org.springframework.web/src/main/java/org/springframework/http/client/support/HttpRequestWrapper.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client.support;
+
+import java.net.URI;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpRequest;
+import org.springframework.util.Assert;
+
+/**
+ * Provides a convenient implementation of the {@link HttpRequest} interface that can be overridden to adapt the
+ * request. Methods default to calling through to the wrapped request object.
+ *
+ * @author Arjen Poutsma
+ * @since 3.1
+ */
+public class HttpRequestWrapper implements HttpRequest {
+
+	private final HttpRequest request;
+
+
+	/**
+	 * Creates a new {@code HttpRequest} wrapping the given request object.
+	 *
+	 * @param request the request object to be wrapped
+	 */
+	public HttpRequestWrapper(HttpRequest request) {
+		Assert.notNull(request, "'request' must not be null");
+		this.request = request;
+	}
+
+	/**
+	 * Returns the wrapped request.
+	 */
+	public HttpRequest getRequest() {
+		return request;
+	}
+
+	/**
+	 * Returns the method of the wrapped request.
+	 */
+	public HttpMethod getMethod() {
+		return this.request.getMethod();
+	}
+
+	/**
+	 * Returns the URI of the wrapped request.
+	 */
+	public URI getURI() {
+		return this.request.getURI();
+	}
+
+	/**
+	 * Returns the headers of the wrapped request.
+	 */
+	public HttpHeaders getHeaders() {
+		return this.request.getHeaders();
+	}
+
+}

org.springframework.web/src/main/java/org/springframework/http/client/support/InterceptingHttpAccessor.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client.support;
+
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.http.client.InterceptingClientHttpRequestFactory;
+import org.springframework.util.ObjectUtils;
+
+/**
+ * Base class for {@link org.springframework.web.client.RestTemplate} and other HTTP accessing gateway helpers, adding
+ * interceptor-related properties to {@link HttpAccessor}'s common properties.
+ *
+ * <p>Not intended to be used directly. See {@link org.springframework.web.client.RestTemplate}.
+ *
+ * @author Arjen Poutsma
+ */
+public abstract class InterceptingHttpAccessor extends HttpAccessor {
+
+	private ClientHttpRequestInterceptor[] interceptors;
+
+	/**
+	 * Sets the request interceptors that this accessor should use.
+	 */
+	public void setInterceptors(ClientHttpRequestInterceptor[] interceptors) {
+		this.interceptors = interceptors;
+	}
+
+	/**
+	 * Return the request interceptor that this accessor uses.
+	 */
+	public ClientHttpRequestInterceptor[] getInterceptors() {
+		return interceptors;
+	}
+
+	@Override
+	public ClientHttpRequestFactory getRequestFactory() {
+		ClientHttpRequestFactory delegate = super.getRequestFactory();
+		if (!ObjectUtils.isEmpty(getInterceptors())) {
+			return new InterceptingClientHttpRequestFactory(delegate, getInterceptors());
+		}
+		else {
+			return delegate;
+		}
+	}
+
+}

org.springframework.web/src/main/java/org/springframework/web/client/RestTemplate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010 the original author or authors.
+ * Copyright 2002-2011 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,7 +33,7 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.http.client.ClientHttpRequest;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.http.client.ClientHttpResponse;
-import org.springframework.http.client.support.HttpAccessor;
+import org.springframework.http.client.support.InterceptingHttpAccessor;
 import org.springframework.http.converter.ByteArrayHttpMessageConverter;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.ResourceHttpMessageConverter;
@@ -113,7 +113,7 @@ import org.springframework.web.util.UriUtils;
  * @see ResponseErrorHandler
  * @since 3.0
  */
-public class RestTemplate extends HttpAccessor implements RestOperations {
+public class RestTemplate extends InterceptingHttpAccessor implements RestOperations {
 
 	private static final boolean jaxb2Present =
 			ClassUtils.isPresent("javax.xml.bind.Binder", RestTemplate.class.getClassLoader());

org.springframework.web/src/test/java/org/springframework/http/client/InterceptingClientHttpRequestFactoryTest.java

@@ -0,0 +1,308 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+import java.util.Arrays;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpRequest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.client.support.HttpRequestWrapper;
+
+import static org.junit.Assert.*;
+
+/**
+ * @author Arjen Poutsma
+ */
+public class InterceptingClientHttpRequestFactoryTest {
+
+	private InterceptingClientHttpRequestFactory requestFactory;
+
+	private RequestFactoryMock requestFactoryMock;
+
+	private RequestMock requestMock;
+
+	private ResponseMock responseMock;
+
+	@Before
+	public void setUp() throws Exception {
+
+		requestFactoryMock = new RequestFactoryMock();
+		requestMock = new RequestMock();
+		responseMock = new ResponseMock();
+
+	}
+
+	@Test
+	public void basic() throws Exception {
+		NoOpInterceptor interceptor1 = new NoOpInterceptor();
+		NoOpInterceptor interceptor2 = new NoOpInterceptor();
+		NoOpInterceptor interceptor3 = new NoOpInterceptor();
+		requestFactory = new InterceptingClientHttpRequestFactory(requestFactoryMock,
+				new ClientHttpRequestInterceptor[]{interceptor1, interceptor2, interceptor3});
+
+		ClientHttpRequest request = requestFactory.createRequest(new URI("http://example.com"), HttpMethod.GET);
+		ClientHttpResponse response = request.execute();
+
+		assertTrue(interceptor1.invoked);
+		assertTrue(interceptor2.invoked);
+		assertTrue(interceptor3.invoked);
+		assertTrue(requestMock.executed);
+		assertSame(responseMock, response);
+	}
+
+	@Test
+	public void noExecution() throws Exception {
+		ClientHttpRequestInterceptor interceptor1 = new ClientHttpRequestInterceptor() {
+			public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+					throws IOException {
+				return responseMock;
+			}
+		};
+
+		NoOpInterceptor interceptor2 = new NoOpInterceptor();
+		requestFactory = new InterceptingClientHttpRequestFactory(requestFactoryMock,
+				new ClientHttpRequestInterceptor[]{interceptor1, interceptor2});
+
+		ClientHttpRequest request = requestFactory.createRequest(new URI("http://example.com"), HttpMethod.GET);
+		ClientHttpResponse response = request.execute();
+
+		assertFalse(interceptor2.invoked);
+		assertFalse(requestMock.executed);
+		assertSame(responseMock, response);
+	}
+
+	@Test
+	public void changeHeaders() throws Exception {
+		final String headerName = "Foo";
+		final String headerValue = "Bar";
+		ClientHttpRequestInterceptor interceptor = new ClientHttpRequestInterceptor() {
+			public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+					throws IOException {
+
+				return execution.execute(new HttpRequestWrapper(request) {
+					@Override
+					public HttpHeaders getHeaders() {
+						HttpHeaders headers = new HttpHeaders();
+						headers.set(headerName, headerValue);
+						return headers;
+					}
+				}, body);
+			}
+		};
+
+		requestMock = new RequestMock() {
+			@Override
+			public ClientHttpResponse execute() throws IOException {
+				assertEquals(headerValue, getHeaders().getFirst(headerName));
+				return super.execute();
+			}
+		};
+
+		requestFactory = new InterceptingClientHttpRequestFactory(requestFactoryMock,
+				new ClientHttpRequestInterceptor[]{interceptor});
+
+		ClientHttpRequest request = requestFactory.createRequest(new URI("http://example.com"), HttpMethod.GET);
+		request.execute();
+	}
+
+	@Test
+	public void changeURI() throws Exception {
+		final URI changedUri = new URI("http://example.com/2");
+		ClientHttpRequestInterceptor interceptor = new ClientHttpRequestInterceptor() {
+			public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+					throws IOException {
+
+				return execution.execute(new HttpRequestWrapper(request) {
+					@Override
+					public URI getURI() {
+						return changedUri;
+					}
+
+				}, body);
+			}
+		};
+
+		requestFactoryMock = new RequestFactoryMock() {
+			@Override
+			public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+				assertEquals(changedUri, uri);
+				return super.createRequest(uri, httpMethod);
+			}
+		};
+
+		requestFactory = new InterceptingClientHttpRequestFactory(requestFactoryMock,
+				new ClientHttpRequestInterceptor[]{interceptor});
+
+		ClientHttpRequest request = requestFactory.createRequest(new URI("http://example.com"), HttpMethod.GET);
+		request.execute();
+	}
+
+	@Test
+	public void changeMethod() throws Exception {
+		final HttpMethod changedMethod = HttpMethod.POST;
+		ClientHttpRequestInterceptor interceptor = new ClientHttpRequestInterceptor() {
+			public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+					throws IOException {
+
+				return execution.execute(new HttpRequestWrapper(request) {
+					@Override
+					public HttpMethod getMethod() {
+						return changedMethod;
+					}
+
+				}, body);
+			}
+		};
+
+		requestFactoryMock = new RequestFactoryMock() {
+			@Override
+			public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+				assertEquals(changedMethod, httpMethod);
+				return super.createRequest(uri, httpMethod);
+			}
+		};
+
+		requestFactory = new InterceptingClientHttpRequestFactory(requestFactoryMock,
+				new ClientHttpRequestInterceptor[]{interceptor});
+
+		ClientHttpRequest request = requestFactory.createRequest(new URI("http://example.com"), HttpMethod.GET);
+		request.execute();
+	}
+
+	@Test
+	public void changeBody() throws Exception {
+		final byte[] changedBody = "Foo".getBytes();
+		ClientHttpRequestInterceptor interceptor = new ClientHttpRequestInterceptor() {
+			public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+					throws IOException {
+
+				return execution.execute(request, changedBody);
+			}
+		};
+
+		requestFactory = new InterceptingClientHttpRequestFactory(requestFactoryMock,
+				new ClientHttpRequestInterceptor[]{interceptor});
+
+		ClientHttpRequest request = requestFactory.createRequest(new URI("http://example.com"), HttpMethod.GET);
+		request.execute();
+		assertTrue(Arrays.equals(changedBody, requestMock.body.toByteArray()));
+	}
+
+	private static class NoOpInterceptor implements ClientHttpRequestInterceptor {
+
+		private boolean invoked = false;
+
+		public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+				throws IOException {
+			invoked = true;
+			return execution.execute(request, body);
+		}
+	}
+
+	private class RequestFactoryMock implements ClientHttpRequestFactory {
+
+		public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+			requestMock.setURI(uri);
+			requestMock.setMethod(httpMethod);
+			return requestMock;
+		}
+
+	}
+
+	private class RequestMock implements ClientHttpRequest {
+
+		private URI uri;
+
+		private HttpMethod method;
+
+		private HttpHeaders headers = new HttpHeaders();
+
+		private ByteArrayOutputStream body = new ByteArrayOutputStream();
+
+		private boolean executed = false;
+
+		private RequestMock() {
+		}
+
+		public URI getURI() {
+			return uri;
+		}
+
+		public void setURI(URI uri) {
+			this.uri = uri;
+		}
+
+		public HttpMethod getMethod() {
+			return method;
+		}
+
+		public void setMethod(HttpMethod method) {
+			this.method = method;
+		}
+
+		public HttpHeaders getHeaders() {
+			return headers;
+		}
+
+		public OutputStream getBody() throws IOException {
+			return body;
+		}
+
+		public ClientHttpResponse execute() throws IOException {
+			executed = true;
+			return responseMock;
+		}
+	}
+
+	private static class ResponseMock implements ClientHttpResponse {
+
+		private HttpStatus statusCode = HttpStatus.OK;
+
+		private String statusText = "";
+
+		private HttpHeaders headers = new HttpHeaders();
+
+		public HttpStatus getStatusCode() throws IOException {
+			return statusCode;
+		}
+
+		public String getStatusText() throws IOException {
+			return statusText;
+		}
+
+		public HttpHeaders getHeaders() {
+			return headers;
+		}
+
+		public InputStream getBody() throws IOException {
+			return null;  //To change body of implemented methods use File | Settings | File Templates.
+		}
+
+		public void close() {
+		}
+	}
+}