/**
* 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.cxf.jaxrs.nio;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.servlet.WriteListener;
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.ws.rs.ext.Provider;
import org.apache.cxf.continuations.Continuation;
import org.apache.cxf.continuations.ContinuationProvider;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
import org.apache.cxf.message.Message;
@Provider
public class NioMessageBodyWriter implements MessageBodyWriter<NioWriteEntity> {
public NioMessageBodyWriter() {
}
@Override
public boolean isWriteable(Class<?> cls, Type type, Annotation[] anns, MediaType mt) {
return NioWriteEntity.class.isAssignableFrom(cls) && getContinuationProvider() != null;
}
@Override
public void writeTo(NioWriteEntity entity, Class<?> cls, Type t, Annotation[] anns,
MediaType mt, MultivaluedMap<String, Object> headers, OutputStream os)
throws IOException, WebApplicationException {
Continuation cont = getContinuationProvider().getContinuation();
NioWriteListenerImpl listener = new NioWriteListenerImpl(cont, entity, os);
Message m = JAXRSUtils.getCurrentMessage();
m.put(WriteListener.class, listener);
// return the current thread to the pool
cont.suspend(0);
}
@Override
public long getSize(NioWriteEntity t, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType) {
return -1;
}
private ContinuationProvider getContinuationProvider() {
return (ContinuationProvider)JAXRSUtils.getCurrentMessage().getExchange()
.getInMessage().get(ContinuationProvider.class.getName());
}
}