SpringWebserviceProducer.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.spring.ws;

import java.io.IOException;
import java.net.URI;

import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;

import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.TypeConverter;
import org.apache.camel.impl.DefaultProducer;
import org.springframework.ws.WebServiceMessage;
import org.springframework.ws.client.core.SourceExtractor;
import org.springframework.ws.client.core.WebServiceMessageCallback;
import org.springframework.ws.soap.addressing.client.ActionCallback;
import org.springframework.ws.soap.client.core.SoapActionCallback;
import org.springframework.xml.transform.TransformerObjectSupport;

public class SpringWebserviceProducer extends DefaultProducer {

	private SpringWebserviceEndpoint endpoint;
	private static final SourceExtractor sourceExtractor = new NoopSourceExtractor();

	public SpringWebserviceProducer(Endpoint endpoint) {
		super(endpoint);
		this.endpoint = (SpringWebserviceEndpoint) endpoint;
	}

	public void process(Exchange exchange) throws Exception {
		// Let Camel TypeConverter hierarchy handle the conversion of XML messages to Source objects
		Source sourcePayload = exchange.getIn().getMandatoryBody(Source.class);
		
		// Extract optional headers
		String endpointUri = exchange.getIn().getHeader(SpringWebserviceConstants.SPRING_WS_ENDPOINT_URI, String.class);
		String soapAction = exchange.getIn().getHeader(SpringWebserviceConstants.SPRING_WS_SOAP_ACTION, String.class);
		URI wsAddressingAction = exchange.getIn().getHeader(SpringWebserviceConstants.SPRING_WS_ADDRESSING_ACTION, URI.class);
		
		WebServiceMessageCallback callback = new DefaultWebserviceMessageCallback(soapAction, wsAddressingAction);
		Object body = null;
		if (endpointUri != null) {
			body = endpoint.getConfiguration().getWebServiceTemplate().sendSourceAndReceive(endpointUri, sourcePayload, callback, sourceExtractor);			
		} else {
			body = endpoint.getConfiguration().getWebServiceTemplate().sendSourceAndReceive(sourcePayload, callback, sourceExtractor);
		}
		exchange.getOut().setBody(body);
	}

	private final class DefaultWebserviceMessageCallback implements WebServiceMessageCallback {
		private String soapActionHeader;
		private URI wsAddressingActionHeader;
		
		public DefaultWebserviceMessageCallback(String soapAction, URI wsAddressingAction) {
			this.soapActionHeader = soapAction;
			this.wsAddressingActionHeader = wsAddressingAction;
		}

		public void doWithMessage(WebServiceMessage message) throws IOException, TransformerException {
			// Add SoapAction to webservice request. Note that exchange header takes precedence over endpoint option
			String soapAction = soapActionHeader != null ? soapActionHeader : endpoint.getConfiguration().getSoapAction();
			if (soapAction != null) {
				new SoapActionCallback(soapAction).doWithMessage(message);
			}
			// Add WS-Addressing Action to webservice request (the WS-Addressing 'to' header will default to the URL of the connection). 
			// Note that exchange header takes precedence over endpoint option
			URI wsAddressingAction = wsAddressingActionHeader != null ? wsAddressingActionHeader : endpoint.getConfiguration().getWsAddressingAction();
			if (wsAddressingAction != null) {
				new ActionCallback(wsAddressingAction).doWithMessage(message);
			}
		}
	}

	/**
	 * A {@link SourceExtractor} that performs no conversion, instead conversion
	 * is handled by Camel's {@link TypeConverter} hierarchy.
	 */
	private static class NoopSourceExtractor extends TransformerObjectSupport implements SourceExtractor {
		public Object extractData(Source source) throws IOException, TransformerException {
			return source;
		}
	}
}