org.glassfish.grizzly.http.server.io.ServerOutputBuffer Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012-2014 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
* https://glassfish.dev.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.grizzly.http.server.io;
import org.glassfish.grizzly.CompletionHandler;
import org.glassfish.grizzly.WriteResult;
import org.glassfish.grizzly.filterchain.FilterChainContext;
import org.glassfish.grizzly.http.io.OutputBuffer;
import org.glassfish.grizzly.http.server.Response;
import java.io.File;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import org.glassfish.grizzly.localization.LogMessages;
public class ServerOutputBuffer extends OutputBuffer {
private Response serverResponse;
public void initialize(final Response response,
final FilterChainContext ctx) {
super.initialize(response.getResponse(), response.isSendFileEnabled(), ctx);
this.serverResponse = response;
}
@Override
public void sendfile(final File file, final long offset, final long length,
final CompletionHandler handler) {
if (!sendfileEnabled) {
throw new IllegalStateException("sendfile support isn't available.");
}
// check the suspend status at the time this method was invoked
// and take action based on this value
final boolean suspendedAtStart = serverResponse.isSuspended();
final CompletionHandler ch;
if (suspendedAtStart && handler != null) {
// provided CompletionHandler assumed to manage suspend/resume
ch = handler;
} else if (!suspendedAtStart && handler != null) {
// provided CompletionHandler assumed to not managed suspend/resume
ch = suspendAndCreateHandler(handler);
} else {
// create internal CompletionHandler that will take the
// appropriate action depending on the current suspend status
ch = createInternalCompletionHandler(file, suspendedAtStart);
}
super.sendfile(file, offset, length, ch);
}
@Override
public void recycle() {
serverResponse = null;
super.recycle();
}
@Override
protected Executor getThreadPool() {
return serverResponse.getRequest().getRequestExecutor();
}
private CompletionHandler createInternalCompletionHandler(
final File file, final boolean suspendedAtStart) {
CompletionHandler ch;
if (!suspendedAtStart) {
serverResponse.suspend();
}
ch = new CompletionHandler() {
@Override
public void cancelled() {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
LogMessages.WARNING_GRIZZLY_HTTP_SERVER_SERVEROUTPUTBUFFER_FILE_TRANSFER_CANCELLED(file.getAbsolutePath()));
}
serverResponse.resume();
}
@Override
public void failed(Throwable throwable) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
LogMessages.WARNING_GRIZZLY_HTTP_SERVER_SERVEROUTPUTBUFFER_FILE_TRANSFER_FAILED(file.getAbsolutePath(), throwable.getMessage()),
throwable);
}
serverResponse.resume();
}
@Override
public void completed(WriteResult result) {
serverResponse.resume();
}
@Override
public void updated(WriteResult result) {
// no-op
}
};
return ch;
}
private CompletionHandler suspendAndCreateHandler(
final CompletionHandler handler) {
serverResponse.suspend();
return new CompletionHandler() {
@Override
public void cancelled() {
handler.cancelled();
serverResponse.resume();
}
@Override
public void failed(Throwable throwable) {
handler.failed(throwable);
serverResponse.resume();
}
@Override
public void completed(WriteResult result) {
handler.completed(result);
serverResponse.resume();
}
@Override
public void updated(WriteResult result) {
handler.updated(result);
}
};
}
}