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/*******************************************************************************
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*
*******************************************************************************/
package org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.resources;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
import javax.servlet.http.HttpServletResponse;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.CambriaApiException;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.backends.Publisher.message;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.resources.streamReaders.CambriaJsonStreamReader;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.resources.streamReaders.CambriaRawStreamReader;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.resources.streamReaders.CambriaStreamReader;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.resources.streamReaders.CambriaTextStreamReader;
import com.att.nsa.apiServer.streams.ChunkedInputStream;
import com.att.nsa.drumlin.service.standards.HttpStatusCodes;
/**
* An inbound event set.
*
* @author author
*/
public class CambriaEventSet {
private final reader fReader;
/**
* constructor initialization
*
* @param mediaType
* @param originalStream
* @param chunked
* @param defPartition
* @throws CambriaApiException
*/
public CambriaEventSet(String mediaType, InputStream originalStream,
boolean chunked, String defPartition) throws CambriaApiException {
InputStream is = originalStream;
if (chunked) {
is = new ChunkedInputStream(originalStream);
}
if (("application/json").equals(mediaType)) {
if (chunked) {
throw new CambriaApiException(
HttpServletResponse.SC_BAD_REQUEST,
"The JSON stream reader doesn't support chunking.");
}
fReader = new CambriaJsonStreamReader(is, defPartition);
} else if (("application/cambria").equals(mediaType)) {
fReader = new CambriaStreamReader(is);
} else if (("application/cambria-zip").equals(mediaType)) {
try {
is = new GZIPInputStream(is);
} catch (IOException e) {
throw new CambriaApiException(HttpStatusCodes.k400_badRequest,
"Couldn't read compressed format: " + e);
}
fReader = new CambriaStreamReader(is);
} else if (("text/plain").equals(mediaType)) {
fReader = new CambriaTextStreamReader(is, defPartition);
} else {
fReader = new CambriaRawStreamReader(is, defPartition);
}
}
/**
* Get the next message from this event set. Returns null when the end of
* stream is reached. Will block until a message arrives (or the stream is
* closed/broken).
*
* @return a message, or null
* @throws IOException
* @throws CambriaApiException
*/
public message next() throws IOException, CambriaApiException {
return fReader.next();
}
/**
*
* @author author
*
*/
public interface reader {
/**
*
* @return
* @throws IOException
* @throws CambriaApiException
*/
message next() throws IOException, CambriaApiException;
}
}
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