/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.jersey.media.sse;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.inject.Inject;
import javax.inject.Provider;
import org.glassfish.jersey.message.MessageBodyWorkers;
/**
* Writer for {@link OutboundEvent}.
*
* @author Pavel Bucek (pavel.bucek at oracle.com)
* @author Marek Potociar (marek.potociar at oracle.com)
*/
class OutboundEventWriter implements MessageBodyWriter<OutboundEvent> {
private static final byte[] COMMENT_LEAD= ": ".getBytes();
private static final byte[] NAME_LEAD= "event: ".getBytes();
private static final byte[] ID_LEAD= "id: ".getBytes();
private static final byte[] RETRY_LEAD= "retry: ".getBytes();
private static final byte[] DATA_LEAD= "data: ".getBytes();
private static final byte[] EOL= {'\n'};
@Inject
private Provider<MessageBodyWorkers> workersProvider;
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return type.equals(OutboundEvent.class) && SseFeature.SERVER_SENT_EVENTS_TYPE.isCompatible(mediaType);
}
@Override
public long getSize(OutboundEvent incomingEvent,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return -1;
}
@Override
@SuppressWarnings("unchecked")
public void writeTo(OutboundEvent outboundEvent,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
final OutputStream entityStream) throws IOException, WebApplicationException {
if (outboundEvent.getComment() != null) {
for (String comment : outboundEvent.getComment().split("\n")) {
entityStream.write(COMMENT_LEAD);
entityStream.write(comment.getBytes());
entityStream.write(EOL);
}
}
if (outboundEvent.getType() != null) {
if (outboundEvent.getName() != null) {
entityStream.write(NAME_LEAD);
entityStream.write(outboundEvent.getName().getBytes());
entityStream.write(EOL);
}
if (outboundEvent.getId() != null) {
entityStream.write(ID_LEAD);
entityStream.write(outboundEvent.getId().getBytes());
entityStream.write(EOL);
}
if (outboundEvent.getReconnectDelay() > SseFeature.RECONNECT_NOT_SET) {
entityStream.write(RETRY_LEAD);
entityStream.write(Long.toString(outboundEvent.getReconnectDelay()).getBytes());
entityStream.write(EOL);
}
final MediaType eventMediaType =
outboundEvent.getMediaType() == null ? MediaType.TEXT_PLAIN_TYPE : outboundEvent.getMediaType();
final MessageBodyWriter messageBodyWriter = workersProvider.get().getMessageBodyWriter(outboundEvent.getType(),
outboundEvent.getGenericType(), annotations, eventMediaType);
messageBodyWriter.writeTo(
outboundEvent.getData(),
outboundEvent.getType(),
outboundEvent.getGenericType(),
annotations,
eventMediaType,
httpHeaders,
new OutputStream() {
private boolean start = true;
@Override
public void write(int i) throws IOException {
if (start) {
entityStream.write(DATA_LEAD);
start = false;
}
entityStream.write(i);
if (i == '\n') {
entityStream.write(DATA_LEAD);
}
}
});
}
}
}