org.openehealth.ipf.platform.camel.ihe.xds.iti17.Iti17Producer.java Source code

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Here is the source code for org.openehealth.ipf.platform.camel.ihe.xds.iti17.Iti17Producer.java

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/*
 * Copyright 2009 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.openehealth.ipf.platform.camel.ihe.xds.iti17;

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.impl.DefaultProducer;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;
import org.openehealth.ipf.commons.ihe.core.atna.AuditorManager;
import org.openehealth.ipf.platform.camel.core.util.Exchanges;
import org.openhealthtools.ihe.atna.auditor.codes.rfc3881.RFC3881EventCodes.RFC3881EventOutcomeCodes;

/**
 * The producer implementation for the ITI-17 component.
 */
public class Iti17Producer extends DefaultProducer {
    private final Iti17Endpoint endpoint;

    /**
     * Constructs the producer.
     * @param endpoint
     *          the endpoint creating this producer.
     */
    public Iti17Producer(Iti17Endpoint endpoint) {
        super(endpoint);
        this.endpoint = endpoint;
    }

    @Override
    public void process(Exchange exchange) throws Exception {
        String documentSpecifyingPart = exchange.getIn().getBody(String.class);
        String uri = endpoint.getServiceUrl() + documentSpecifyingPart;

        final HttpClient httpClient = new HttpClient();
        final GetMethod get = new GetMethod(uri);
        boolean keepConnection = false;
        try {
            httpClient.executeMethod(get);
            keepConnection = handleResponse(exchange, get);
        } finally {
            if (!keepConnection) {
                get.releaseConnection();
            }

            // audit
            // TODO: finer mapping between HTTP response codes and event outcome codes
            RFC3881EventOutcomeCodes eventOutcome = keepConnection ? RFC3881EventOutcomeCodes.SUCCESS
                    : RFC3881EventOutcomeCodes.MAJOR_FAILURE;

            AuditorManager.getConsumerAuditor().auditRetrieveDocumentEvent(eventOutcome, uri, /*userName*/ null,
                    /*documentUniqueId*/ null, /*patientId*/ null);
        }
    }

    private boolean handleResponse(Exchange exchange, final GetMethod get) throws IOException {
        Message out = Exchanges.resultMessage(exchange);
        if (get.getStatusCode() == 200) {
            out.setBody(createWrappedStream(get));
            return true;
        }

        out.setBody(get.getStatusCode());
        out.setFault(true);

        return false;
    }

    private InputStream createWrappedStream(final GetMethod get) throws IOException {
        return new FilterInputStream(get.getResponseBodyAsStream()) {
            @Override
            public void close() throws IOException {
                super.close();
                get.releaseConnection();
            }
        };
    }
}