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DefaultPersistenceStreamConfig.java
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DefaultPersistenceStreamConfig.java
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/*
* Copyright (c) 2019 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.thingsearch.service.common.config;
import java.text.MessageFormat;
import java.time.Duration;
import java.util.Objects;
import java.util.Optional;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.service.config.supervision.ExponentialBackOffConfig;
import org.eclipse.ditto.internal.utils.config.ConfigWithFallback;
import org.eclipse.ditto.internal.utils.config.DittoConfigError;
import com.mongodb.WriteConcern;
import com.typesafe.config.Config;
/**
* This class is the default implementation of {@link PersistenceStreamConfig}.
*/
@Immutable
public final class DefaultPersistenceStreamConfig implements PersistenceStreamConfig {
static final String CONFIG_PATH = "persistence";
private final int maxBulkSize;
private final Duration ackDelay;
private final WriteConcern withAcknowledgementsWriteConcern;
private final DefaultStreamStageConfig defaultStreamStageConfig;
private DefaultPersistenceStreamConfig(final ConfigWithFallback persistenceStreamScopedConfig,
final DefaultStreamStageConfig defaultStreamStageConfig) {
maxBulkSize = persistenceStreamScopedConfig.getPositiveIntOrThrow(PersistenceStreamConfigValue.MAX_BULK_SIZE);
ackDelay = persistenceStreamScopedConfig.getNonNegativeDurationOrThrow(PersistenceStreamConfigValue.ACK_DELAY);
final var writeConcernString = persistenceStreamScopedConfig.getString(
PersistenceStreamConfigValue.WITH_ACKS_WRITE_CONCERN.getConfigPath());
withAcknowledgementsWriteConcern = Optional.of(WriteConcern.valueOf(writeConcernString))
.orElseThrow(() -> {
final String msg =
MessageFormat.format("Could not parse a WriteConcern from configured string <{0}>",
writeConcernString);
return new DittoConfigError(msg);
});
this.defaultStreamStageConfig = defaultStreamStageConfig;
}
/**
* Returns an instance of DefaultPersistenceStreamConfig based on the settings of the specified Config.
*
* @param config is supposed to provide the settings of the persistence stream config at {@value CONFIG_PATH}.
* @return the instance.
* @throws org.eclipse.ditto.internal.utils.config.DittoConfigError if {@code config} is invalid.
*/
public static DefaultPersistenceStreamConfig of(final Config config) {
return new DefaultPersistenceStreamConfig(
ConfigWithFallback.newInstance(config, CONFIG_PATH, PersistenceStreamConfigValue.values()),
DefaultStreamStageConfig.getInstance(config, CONFIG_PATH));
}
@Override
public int getMaxBulkSize() {
return maxBulkSize;
}
@Override
public Duration getAckDelay() {
return ackDelay;
}
@Override
public WriteConcern getWithAcknowledgementsWriteConcern() {
return withAcknowledgementsWriteConcern;
}
@Override
public int getParallelism() {
return defaultStreamStageConfig.getParallelism();
}
@Override
public ExponentialBackOffConfig getExponentialBackOffConfig() {
return defaultStreamStageConfig.getExponentialBackOffConfig();
}
@Override
public boolean equals(@Nullable final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final DefaultPersistenceStreamConfig that = (DefaultPersistenceStreamConfig) o;
return maxBulkSize == that.maxBulkSize &&
Objects.equals(ackDelay, that.ackDelay) &&
Objects.equals(withAcknowledgementsWriteConcern, that.withAcknowledgementsWriteConcern) &&
Objects.equals(defaultStreamStageConfig, that.defaultStreamStageConfig);
}
@Override
public int hashCode() {
return Objects.hash(maxBulkSize, ackDelay, withAcknowledgementsWriteConcern,
defaultStreamStageConfig);
}
@Override
public String toString() {
return getClass().getSimpleName() + " [" +
"maxBulkSize=" + maxBulkSize +
", ackDelay=" + ackDelay +
", withAcknowledgementsWriteConcern=" + withAcknowledgementsWriteConcern +
", defaultStreamStageConfig=" + defaultStreamStageConfig +
"]";
}
}