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4ff77fb370
The connection to GAE is not persistent and can drop. Reconnect when that happens, as long as the connection from the client is still active. We need to consider the fact that while a reconnection is happening, the client may be sending requests that was relayed to the old connection, which is not going through. In that case these requests are queued and will be retried when the new connection is available. Since we are no longer tying the lifecycles of the two connections, we cannot automatically terminate one when another is terminated. Also we need to explicitly control how WHOIS connection is terminated, not depending on the HTTP connection header. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=207335498
109 lines
4.3 KiB
Java
109 lines
4.3 KiB
Java
// Copyright 2017 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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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package google.registry.proxy.handler;
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import static com.google.common.truth.Truth.assertThat;
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import static google.registry.proxy.Protocol.PROTOCOL_KEY;
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import static google.registry.proxy.handler.RelayHandler.RELAY_BUFFER_KEY;
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import static google.registry.proxy.handler.RelayHandler.RELAY_CHANNEL_KEY;
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import com.google.common.collect.ImmutableList;
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import google.registry.proxy.Protocol;
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import google.registry.proxy.Protocol.BackendProtocol;
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import google.registry.proxy.Protocol.FrontendProtocol;
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import io.netty.channel.embedded.EmbeddedChannel;
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import java.util.ArrayDeque;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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/** Unit tests for {@link RelayHandler}. */
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@RunWith(JUnit4.class)
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public class RelayHandlerTest {
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private static final class ExpectedType {}
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private static final class OtherType {}
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private final RelayHandler<ExpectedType> relayHandler = new RelayHandler<>(ExpectedType.class);
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private final EmbeddedChannel inboundChannel = new EmbeddedChannel(relayHandler);
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private final EmbeddedChannel outboundChannel = new EmbeddedChannel();
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private final FrontendProtocol frontendProtocol =
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Protocol.frontendBuilder()
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.port(0)
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.name("FRONTEND")
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.handlerProviders(ImmutableList.of())
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.relayProtocol(
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Protocol.backendBuilder()
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.host("host.invalid")
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.port(0)
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.name("BACKEND")
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.handlerProviders(ImmutableList.of())
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.build())
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.build();
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private final BackendProtocol backendProtocol = frontendProtocol.relayProtocol();
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@Before
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public void setUp() {
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inboundChannel.attr(RELAY_CHANNEL_KEY).set(outboundChannel);
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inboundChannel.attr(RELAY_BUFFER_KEY).set(new ArrayDeque<>());
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inboundChannel.attr(PROTOCOL_KEY).set(frontendProtocol);
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outboundChannel.attr(PROTOCOL_KEY).set(backendProtocol);
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}
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@Test
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public void testSuccess_relayInboundMessageOfExpectedType() {
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ExpectedType inboundMessage = new ExpectedType();
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// Relay handler intercepted the message, no further inbound message.
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assertThat(inboundChannel.writeInbound(inboundMessage)).isFalse();
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// Message wrote to outbound channel as-is.
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ExpectedType relayedMessage = outboundChannel.readOutbound();
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assertThat(relayedMessage).isEqualTo(inboundMessage);
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}
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@Test
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public void testSuccess_ignoreInboundMessageOfOtherType() {
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OtherType inboundMessage = new OtherType();
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// Relay handler ignores inbound message of other types, the inbound message is passed along.
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assertThat(inboundChannel.writeInbound(inboundMessage)).isTrue();
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// Nothing is written into the outbound channel.
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ExpectedType relayedMessage = outboundChannel.readOutbound();
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assertThat(relayedMessage).isNull();
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}
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@Test
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public void testSuccess_outboundClosed_enqueueBuffer() {
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ExpectedType inboundMessage = new ExpectedType();
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// Outbound channel (backend) is closed.
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outboundChannel.finish();
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assertThat(inboundChannel.writeInbound(inboundMessage)).isFalse();
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ExpectedType relayedMessage = outboundChannel.readOutbound();
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assertThat(relayedMessage).isNull();
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// Inbound channel (frontend) should stay open.
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assertThat(inboundChannel.isActive()).isTrue();
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assertThat(inboundChannel.attr(RELAY_BUFFER_KEY).get()).containsExactly(inboundMessage);
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}
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@Test
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public void testSuccess_channelRead_relayNotSet() {
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ExpectedType inboundMessage = new ExpectedType();
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inboundChannel.attr(RELAY_CHANNEL_KEY).set(null);
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// Nothing to read.
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assertThat(inboundChannel.writeInbound(inboundMessage)).isFalse();
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// Inbound channel is closed.
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assertThat(inboundChannel.isActive()).isFalse();
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}
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}
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