ratpack.http.internal.ConnectionIdleTimeout.java Source code

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Here is the source code for ratpack.http.internal.ConnectionIdleTimeout.java

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/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed 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 ratpack.http.internal;

import io.netty.channel.Channel;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.timeout.IdleStateHandler;
import io.netty.util.AttributeKey;

import java.time.Duration;
import java.util.concurrent.TimeUnit;

public class ConnectionIdleTimeout implements RequestIdleTimeout {

    private final static AttributeKey<ConnectionIdleTimeout> ATTRIBUTE_KEY = AttributeKey
            .valueOf(ConnectionIdleTimeout.class.getName());
    private static final String HANDLER_NAME = "timeout";

    private final ChannelPipeline channelPipeline;
    private final Duration timeout;
    boolean handlerRegistered;

    public ConnectionIdleTimeout(ChannelPipeline channelPipeline, Duration timeout) {
        this.channelPipeline = channelPipeline;
        this.timeout = timeout;

        channelPipeline.channel().attr(ATTRIBUTE_KEY).set(this);

        if (!timeout.isZero()) {
            init(timeout);
        }
    }

    public static ConnectionIdleTimeout of(Channel channel) {
        return channel.attr(ATTRIBUTE_KEY).get();
    }

    @Override
    public void setRequestIdleTimeout(Duration duration) {
        if (handlerRegistered) {
            channelPipeline.remove(HANDLER_NAME);
        }
        if (duration.isZero()) {
            handlerRegistered = false;
        } else {
            init(duration);
        }
    }

    public void reset() {
        if (handlerRegistered) {
            channelPipeline.remove(HANDLER_NAME);
        }
        if (!timeout.isZero()) {
            init(timeout);
        }
    }

    private void init(Duration duration) {
        long millis = duration.toMillis();
        channelPipeline.addFirst(HANDLER_NAME, new IdleStateHandler(millis, millis, 0, TimeUnit.MILLISECONDS));
        handlerRegistered = true;
    }

}