109 lines
3.5 KiB
Java
109 lines
3.5 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.coyote.http2;
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import java.util.Map;
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/**
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* Represents the local connection settings i.e. the settings the client is
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* expected to use when communicating with the server. There will be a delay
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* between calling a setter and the setting taking effect at the client. When a
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* setter is called, the new value is added to the set of pending settings. Once
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* the ACK is received, the new value is moved to the current settings. While
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* waiting for the ACK, the getters will return the most lenient / generous /
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* relaxed of the current setting and the pending setting. This class does not
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* validate the values passed to the setters. If an invalid value is used the
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* client will respond (almost certainly by closing the connection) as defined
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* in the HTTP/2 specification.
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*/
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public class ConnectionSettingsLocal extends ConnectionSettingsBase<IllegalArgumentException> {
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private static final String ENDPOINT_NAME = "Local(client->server)";
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private boolean sendInProgress = false;
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public ConnectionSettingsLocal(String connectionId) {
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super(connectionId);
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}
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@Override
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protected synchronized void set(Setting setting, Long value) {
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checkSend();
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if (current.get(setting).longValue() == value.longValue()) {
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pending.remove(setting);
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} else {
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pending.put(setting, value);
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}
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}
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synchronized byte[] getSettingsFrameForPending() {
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checkSend();
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int payloadSize = pending.size() * 6;
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byte[] result = new byte[9 + payloadSize];
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ByteUtil.setThreeBytes(result, 0, payloadSize);
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result[3] = FrameType.SETTINGS.getIdByte();
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// No flags
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// Stream is zero
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// Payload
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int pos = 9;
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for (Map.Entry<Setting,Long> setting : pending.entrySet()) {
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ByteUtil.setTwoBytes(result, pos, setting.getKey().getId());
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pos += 2;
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ByteUtil.setFourBytes(result, pos, setting.getValue().longValue());
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pos += 4;
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}
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sendInProgress = true;
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return result;
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}
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synchronized boolean ack() {
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if (sendInProgress) {
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sendInProgress = false;
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current.putAll(pending);
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pending.clear();
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return true;
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} else {
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return false;
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}
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}
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private void checkSend() {
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if (sendInProgress) {
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// Coding error. No need for i18n
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throw new IllegalStateException();
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}
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}
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@Override
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void throwException(String msg, Http2Error error) throws IllegalArgumentException {
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throw new IllegalArgumentException(msg);
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}
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@Override
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final String getEndpointName() {
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return ENDPOINT_NAME;
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}
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}
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