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Switched to generic implementation of MQTT with backpressure.
* Legacy MQTT implementation still has to be removed after testing. * Refactored `GenericMqttClientFactory` to be a utility class instead of an interface because it did not make sense to have an instance of this factory. This entailed some static mocking in `GenericMqttClientActorTest` and `ConnectionTesterTest`. * Provide `MqttSpecificConfig` to `HiveMqttClientProperties` because this config is required in `GenericMqttActor` anyway. This prevents duplicate creation of `MqttSpecificConfig`. * Implemented possibility of reconnecting of consumer client to `GenericMqttActor`. Signed-off-by: Juergen Fickel <juergen.fickel@bosch.io>
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Juergen Fickel
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May 31, 2022
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94 changes: 94 additions & 0 deletions
94
...e/src/main/java/org/eclipse/ditto/connectivity/service/messaging/mqtt/ReconnectDelay.java
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|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * 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; | ||
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| import java.time.Duration; | ||
| import java.util.Objects; | ||
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| import javax.annotation.Nullable; | ||
| import javax.annotation.concurrent.Immutable; | ||
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| import org.eclipse.ditto.base.model.common.ConditionChecker; | ||
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| /** | ||
| * Delay how long to wait before reconnecting an MQTT client. | ||
| * This delay is guaranteed | ||
| */ | ||
| @Immutable | ||
| public final class ReconnectDelay implements Comparable<ReconnectDelay> { | ||
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| /** | ||
| * The lower boundary a {@code ReconnectDelay} a never falls below. | ||
| */ | ||
| static final Duration LOWER_BOUNDARY = Duration.ofSeconds(1L); | ||
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| private final Duration duration; | ||
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| private ReconnectDelay(final Duration duration) { | ||
| this.duration = duration; | ||
| } | ||
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| /** | ||
| * Returns an instance of {@code ReconnectDelay} for the specified {@code Duration} argument or | ||
| * {@link #LOWER_BOUNDARY} if the argument is less than the lower boundary. | ||
| * | ||
| * @param duration the duration of the returned {@code ReconnectDelay}. | ||
| * @return the instance. | ||
| * @throws NullPointerException if {@code duration} is {@code null}. | ||
| */ | ||
| static ReconnectDelay ofOrLowerBoundary(final Duration duration) { | ||
| final Duration durationWithinLowerBoundary; | ||
| if (0 < LOWER_BOUNDARY.compareTo(ConditionChecker.checkNotNull(duration, "duration"))) { | ||
| durationWithinLowerBoundary = LOWER_BOUNDARY; | ||
| } else { | ||
| durationWithinLowerBoundary = duration; | ||
| } | ||
| return new ReconnectDelay(durationWithinLowerBoundary); | ||
| } | ||
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| public Duration getDuration() { | ||
| return duration; | ||
| } | ||
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| @Override | ||
| public int compareTo(final ReconnectDelay o) { | ||
| ConditionChecker.checkNotNull(o, "o"); | ||
| return duration.compareTo(o.getDuration()); | ||
| } | ||
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| @Override | ||
| public boolean equals(@Nullable final Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| final var that = (ReconnectDelay) o; | ||
| return Objects.equals(duration, that.duration); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(duration); | ||
| } | ||
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| /** | ||
| * @return the string representation of the wrapped {@code Duration}. | ||
| */ | ||
| @Override | ||
| public String toString() { | ||
| return duration.toString(); | ||
| } | ||
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| } |
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