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DefaultGenericMqttClient.java
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DefaultGenericMqttClient.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.client;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.IllegalKeepAliveIntervalSecondsException;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.message.connect.GenericMqttConnect;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.message.publish.GenericMqttPublish;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.message.subscribe.GenericMqttSubAck;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.message.subscribe.GenericMqttSubscribe;
import org.eclipse.ditto.connectivity.service.util.ConnectivityMdcEntryKey;
import org.eclipse.ditto.internal.utils.akka.logging.DittoLogger;
import org.eclipse.ditto.internal.utils.akka.logging.DittoLoggerFactory;
import io.reactivex.Flowable;
import io.reactivex.Single;
/**
* Default implementation of {@link GenericMqttClient}.
*/
final class DefaultGenericMqttClient implements GenericMqttClient {
private final BaseGenericMqttSubscribingClient<?> subscribingClient;
private final BaseGenericMqttPublishingClient<?> publishingClient;
private final HiveMqttClientProperties hiveMqttClientProperties;
private final DittoLogger logger;
private DefaultGenericMqttClient(final BaseGenericMqttSubscribingClient<?> subscribingClient,
final BaseGenericMqttPublishingClient<?> publishingClient,
final HiveMqttClientProperties hiveMqttClientProperties) {
this.subscribingClient = subscribingClient;
this.publishingClient = publishingClient;
this.hiveMqttClientProperties = hiveMqttClientProperties;
logger = DittoLoggerFactory.getLogger(DefaultGenericMqttClient.class)
.withMdcEntry(ConnectivityMdcEntryKey.CONNECTION_ID, hiveMqttClientProperties.getConnectionId());
}
static GenericMqttClient newInstance(final BaseGenericMqttSubscribingClient<?> genericMqttSubscribingClient,
final BaseGenericMqttPublishingClient<?> genericMqttPublishingClient,
final HiveMqttClientProperties hiveMqttClientProperties) {
return new DefaultGenericMqttClient(checkNotNull(genericMqttSubscribingClient, "genericMqttSubscribingClient"),
checkNotNull(genericMqttPublishingClient, "genericMqttPublishingClient"),
checkNotNull(hiveMqttClientProperties, "hiveMqttClientProperties"));
}
@Override
public CompletionStage<Void> connect() {
return getGenericMqttConnect().thenCompose(this::connect);
}
private CompletionStage<GenericMqttConnect> getGenericMqttConnect() {
final var mqttSpecificConfig = hiveMqttClientProperties.getMqttSpecificConfig();
try {
return CompletableFuture.completedFuture(GenericMqttConnect.newInstance(mqttSpecificConfig.cleanSession(),
mqttSpecificConfig.getKeepAliveIntervalOrDefault()));
} catch (final IllegalKeepAliveIntervalSecondsException e) {
return CompletableFuture.failedFuture(e);
}
}
@Override
public CompletionStage<Void> connect(final GenericMqttConnect genericMqttConnect) {
checkNotNull(genericMqttConnect, "genericMqttConnect");
return connectSubscribingClient(genericMqttConnect)
.thenCompose(unusedVoid -> connectPublishingClient(genericMqttConnect));
}
private CompletionStage<Void> connectSubscribingClient(final GenericMqttConnect genericMqttConnect) {
return subscribingClient.connect(genericMqttConnect)
.whenComplete((unusedVoid, throwable) -> {
if (null == throwable) {
logger.debug("Connected subscribing client <{}>.", subscribingClient);
} else {
logger.info("Failed to connect subscribing client <{}>.", subscribingClient, throwable);
}
});
}
private CompletionStage<Void> connectPublishingClient(final GenericMqttConnect genericMqttConnect) {
return publishingClient.connect(genericMqttConnect)
.whenComplete((unusedVoid, throwable) -> {
if (null == throwable) {
logger.debug("Connected publishing client <{}>.", publishingClient);
} else {
logger.info("Failed to connect publishing client <{}>. Disconnecting subscribing client …",
publishingClient,
throwable);
disconnectSubscribingClient();
}
});
}
private CompletableFuture<Void> disconnectSubscribingClient() {
return subscribingClient.disconnect()
.whenComplete((unusedVoid, throwable) -> {
if (null == throwable) {
logger.debug("Disconnected subscribing client <{}>.", subscribingClient);
} else {
logger.info("Failed to disconnect subscribing client <{}>.", subscribingClient, throwable);
}
})
.toCompletableFuture();
}
@Override
public CompletionStage<Void> disconnect() {
return disconnectClientRole(ClientRole.CONSUMER_PUBLISHER);
}
@Override
public CompletionStage<Void> disconnectClientRole(final ClientRole clientRole) {
return switch (checkNotNull(clientRole, "clientRole")) {
case CONSUMER -> disconnectSubscribingClient();
case PUBLISHER -> disconnectPublishingClient();
case CONSUMER_PUBLISHER ->
CompletableFuture.allOf(disconnectPublishingClient(), disconnectSubscribingClient());
};
}
private CompletableFuture<Void> disconnectPublishingClient() {
return publishingClient.disconnect()
.whenComplete((unusedVoid, throwable) -> {
if (null == throwable) {
logger.debug("Disconnected publishing client <{}>.", publishingClient);
} else {
logger.info("Failed to disconnect publishing client <{}>.", publishingClient);
}
})
.toCompletableFuture();
}
@Override
public Single<GenericMqttSubAck> subscribe(final GenericMqttSubscribe genericMqttSubscribe) {
return subscribingClient.subscribe(genericMqttSubscribe);
}
@Override
public Flowable<GenericMqttPublish> consumeSubscribedPublishesWithManualAcknowledgement() {
return subscribingClient.consumeSubscribedPublishesWithManualAcknowledgement();
}
@Override
public CompletionStage<GenericMqttPublishResult> publish(final GenericMqttPublish genericMqttPublish) {
return publishingClient.publish(genericMqttPublish);
}
}