/**
* 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.jooby.internal.jetty;
import java.util.Optional;
import java.util.concurrent.Executor;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.io.EofException;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.HttpChannel;
import org.eclipse.jetty.server.HttpOutput;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Response;
import org.jooby.Sse;
import com.google.common.util.concurrent.MoreExecutors;
import javaslang.concurrent.Promise;
import javaslang.control.Try;
public class JettySse extends Sse {
private Request req;
private Response rsp;
private HttpOutput out;
public JettySse(final Request request, final Response rsp) {
this.req = request;
this.rsp = rsp;
this.out = rsp.getHttpOutput();
}
@Override
protected void closeInternal() {
Try.run(() -> rsp.closeOutput())
.onFailure(cause -> log.debug("error while closing connection", cause));
}
@Override
protected void handshake(final Runnable handler) throws Exception {
/** Infinite timeout because the continuation is never resumed but only completed on close. */
req.getAsyncContext().setTimeout(0L);
/** Server sent events headers. */
rsp.setStatus(HttpServletResponse.SC_OK);
rsp.setHeader("Connection", "Close");
rsp.setContentType("text/event-stream; charset=utf-8");
rsp.flushBuffer();
HttpChannel channel = rsp.getHttpChannel();
Connector connector = channel.getConnector();
Executor executor = connector.getExecutor();
executor.execute(handler);
}
@Override
protected Promise<Optional<Object>> send(final Optional<Object> id, final byte[] data) {
synchronized (this) {
Promise<Optional<Object>> promise = Promise.make(MoreExecutors.newDirectExecutorService());
try {
out.write(data);
out.flush();
promise.success(id);
} catch (Throwable ex) {
promise.failure(ex);
ifClose(ex);
}
return promise;
}
}
@Override
protected boolean shouldClose(final Throwable ex) {
return ex instanceof EofException || super.shouldClose(ex);
}
}