/* * Copyright 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.async.http.client; import java.io.IOException; import org.springframework.async.CompletionHandler; import org.springframework.http.HttpHeaders; import org.springframework.util.Assert; /** * @author Jon Brisbin <jon@jbrisbin.com> */ public abstract class AbstractClientHttpRequest implements ClientHttpRequest { protected boolean executed = false; protected final HttpHeaders headers = new HttpHeaders(); private CompletionHandler<?> completionHandler; public final HttpHeaders getHeaders() { return headers; } @Override public <V> void setCompletionHandler(CompletionHandler<V> completionHandler) { this.completionHandler = completionHandler; } public final ClientHttpResponse execute() throws IOException { checkExecuted(); ClientHttpResponse result = executeInternal(this.headers); this.executed = true; return result; } private void checkExecuted() { Assert.state(!this.executed, "ClientHttpRequest already executed"); } /** * Abstract template method that writes the given headers and content to the HTTP request. * * @param headers the HTTP headers * @return the response object for the executed request */ protected abstract ClientHttpResponse executeInternal(HttpHeaders headers) throws IOException; }