/*
* 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;
}