/*
* Copyright 2014 The Netty Project
*
* The Netty Project 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 io.netty.example.http2.helloworld.client;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http2.Http2Settings;
import java.util.concurrent.TimeUnit;
Reads the first Http2Settings
object and notifies a ChannelPromise
/**
* Reads the first {@link Http2Settings} object and notifies a {@link io.netty.channel.ChannelPromise}
*/
public class Http2SettingsHandler extends SimpleChannelInboundHandler<Http2Settings> {
private final ChannelPromise promise;
Create new instance
Params: - promise – Promise object used to notify when first settings are received
/**
* Create new instance
*
* @param promise Promise object used to notify when first settings are received
*/
public Http2SettingsHandler(ChannelPromise promise) {
this.promise = promise;
}
Wait for this handler to be added after the upgrade to HTTP/2, and for initial preface
handshake to complete.
Params: - timeout – Time to wait
- unit –
TimeUnit
for timeout
Throws: - Exception – if timeout or other failure occurs
/**
* Wait for this handler to be added after the upgrade to HTTP/2, and for initial preface
* handshake to complete.
*
* @param timeout Time to wait
* @param unit {@link java.util.concurrent.TimeUnit} for {@code timeout}
* @throws Exception if timeout or other failure occurs
*/
public void awaitSettings(long timeout, TimeUnit unit) throws Exception {
if (!promise.awaitUninterruptibly(timeout, unit)) {
throw new IllegalStateException("Timed out waiting for settings");
}
if (!promise.isSuccess()) {
throw new RuntimeException(promise.cause());
}
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, Http2Settings msg) throws Exception {
promise.setSuccess();
// Only care about the first settings message
ctx.pipeline().remove(this);
}
}