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PooledConnectionProviderCustomMetricsTest.java
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PooledConnectionProviderCustomMetricsTest.java
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/*
* Copyright (c) 2020-2022 VMware, Inc. or its affiliates, All Rights Reserved.
*
* 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
*
* https://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 reactor.netty.resources;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.time.Duration;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Supplier;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.handler.logging.LoggingHandler;
import io.netty.resolver.AddressResolverGroup;
import io.netty.resolver.DefaultAddressResolverGroup;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import reactor.netty.ConnectionObserver;
import reactor.netty.channel.ChannelMetricsRecorder;
import reactor.netty.transport.ClientTransportConfig;
import reactor.util.annotation.Nullable;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.fail;
class PooledConnectionProviderCustomMetricsTest {
private Supplier<? extends SocketAddress> remoteAddress;
private EventLoopGroup group;
private ConnectionProvider pool;
private final static int MAX_ALLOC_SIZE = 100;
private final static int MAX_PENDING_ACQUIRE_SIZE = 1000;
@BeforeEach
void setUp() {
remoteAddress = () -> InetSocketAddress.createUnresolved("localhost", 0);
group = new NioEventLoopGroup(2);
}
@AfterEach
void tearDown() throws Exception {
group.shutdownGracefully()
.get(10L, TimeUnit.SECONDS);
pool.dispose();
}
@Test
void customRegistrarIsUsed() {
AtomicBoolean registered = new AtomicBoolean();
AtomicBoolean deRegistered = new AtomicBoolean();
triggerAcquisition(true, () -> new MeterRegistrarImpl(registered, deRegistered, null));
assertThat(registered.get()).isTrue();
assertThat(deRegistered.get()).isFalse();
pool.dispose();
assertThat(deRegistered.get()).isTrue();
}
@Test
void connectionPoolMaxMetrics() {
AtomicInteger customMetric = new AtomicInteger();
triggerAcquisition(true, () -> new MeterRegistrarImpl(null, null, customMetric));
assertThat(customMetric.get()).isEqualTo(MAX_ALLOC_SIZE);
}
@Test
void customRegistrarSupplierNotInvokedWhenMetricsDisabled() {
AtomicBoolean registered = new AtomicBoolean();
triggerAcquisition(false, () -> new MeterRegistrarImpl(registered, null, null));
assertThat(registered.get()).isFalse();
}
@Test
void disposeWhenMetricsDeregistered() {
AtomicBoolean registered = new AtomicBoolean();
AtomicBoolean deRegistered = new AtomicBoolean();
triggerAcquisition(true, () -> new MeterRegistrarImpl(registered, deRegistered, null));
assertThat(registered.get()).isTrue();
assertThat(deRegistered.get()).isFalse();
pool.disposeWhen(remoteAddress.get());
assertThat(deRegistered.get()).isTrue();
}
private void triggerAcquisition(boolean metricsEnabled, Supplier<ConnectionProvider.MeterRegistrar> registrarSupplier) {
pool = ConnectionProvider.builder("test")
.metrics(metricsEnabled, registrarSupplier)
.maxConnections(MAX_ALLOC_SIZE)
.pendingAcquireMaxCount(MAX_PENDING_ACQUIRE_SIZE)
.build();
ClientTransportConfigImpl config =
new ClientTransportConfigImpl(group, pool, Collections.emptyMap(), remoteAddress);
try {
pool.acquire(config, ConnectionObserver.emptyListener(), remoteAddress, config.resolverInternal())
.block(Duration.ofSeconds(10L));
fail("Exception is expected");
}
catch (Exception expected) {
// ignore
}
}
static final class MeterRegistrarImpl implements ConnectionProvider.MeterRegistrar {
AtomicBoolean registered;
AtomicBoolean deRegistered;
AtomicInteger customMetric;
MeterRegistrarImpl(
@Nullable AtomicBoolean registered,
@Nullable AtomicBoolean deRegistered,
@Nullable AtomicInteger customMetric) {
this.registered = registered;
this.deRegistered = deRegistered;
this.customMetric = customMetric;
}
@Override
public void registerMetrics(String poolName, String id, SocketAddress remoteAddress, ConnectionPoolMetrics metrics) {
if (registered != null) {
registered.set(true);
}
if (customMetric != null) {
customMetric.set(metrics.maxAllocatedSize());
}
}
@Override
public void deRegisterMetrics(String poolName, String id, SocketAddress remoteAddress) {
if (deRegistered != null) {
deRegistered.set(true);
}
}
}
static final class ClientTransportConfigImpl extends ClientTransportConfig<ClientTransportConfigImpl> {
final EventLoopGroup group;
ClientTransportConfigImpl(EventLoopGroup group, ConnectionProvider connectionProvider,
Map<ChannelOption<?>, ?> options, Supplier<? extends SocketAddress> remoteAddress) {
super(connectionProvider, options, remoteAddress);
this.group = group;
}
@Override
protected LoggingHandler defaultLoggingHandler() {
return null;
}
@Override
protected LoopResources defaultLoopResources() {
return preferNative -> group;
}
@Override
protected ChannelMetricsRecorder defaultMetricsRecorder() {
return null;
}
@Override
protected AddressResolverGroup<?> defaultAddressResolverGroup() {
return DefaultAddressResolverGroup.INSTANCE;
}
@Override
protected EventLoopGroup eventLoopGroup() {
return group;
}
@Override
protected AddressResolverGroup<?> resolverInternal() {
return super.resolverInternal();
}
}
}