DropboxScheduledPollGetConsumer.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.dropbox.integration.consumer;

import java.util.Map;

import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.component.dropbox.DropboxConfiguration;
import org.apache.camel.component.dropbox.DropboxEndpoint;
import org.apache.camel.component.dropbox.core.DropboxAPIFacade;
import org.apache.camel.component.dropbox.dto.DropboxFileDownloadResult;
import org.apache.camel.component.dropbox.util.DropboxResultHeader;

public class DropboxScheduledPollGetConsumer extends DropboxScheduledPollConsumer {

    public DropboxScheduledPollGetConsumer(DropboxEndpoint endpoint, Processor processor, DropboxConfiguration configuration) {
        super(endpoint, processor, configuration);
    }

    /**
     * Poll from a dropbox remote path and put the result in the message exchange
     * @return number of messages polled
     * @throws Exception
     */
    @Override
    protected int poll() throws Exception {
        Exchange exchange = endpoint.createExchange();
        DropboxFileDownloadResult result = new DropboxAPIFacade(configuration.getClient(), exchange)
                .get(configuration.getRemotePath());

        Map<String, Object> map = result.getEntries();
        if (map.size() == 1) {
            for (Map.Entry<String, Object> entry : map.entrySet()) {
                exchange.getIn().setHeader(DropboxResultHeader.DOWNLOADED_FILE.name(), entry.getKey());
                exchange.getIn().setBody(entry.getValue());
            }
        } else {
            StringBuilder pathsExtracted = new StringBuilder();
            for (Map.Entry<String, Object> entry : map.entrySet()) {
                pathsExtracted.append(entry.getKey()).append("\n");
            }
            exchange.getIn().setHeader(DropboxResultHeader.DOWNLOADED_FILES.name(), pathsExtracted.toString());
            exchange.getIn().setBody(map);
        }

        if (LOG.isDebugEnabled()) {
            LOG.debug("Downloaded: {}", result.toString());
        }

        try {
            // send message to next processor in the route
            getProcessor().process(exchange);
            return 1; // number of messages polled
        } finally {
            // log exception if an exception occurred and was not handled
            if (exchange.getException() != null) {
                getExceptionHandler().handleException("Error processing exchange", exchange, exchange.getException());
            }
        }
    }
}