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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nokia.
* Copyright (C) 2021 Samsung Electronics.
* ================================================================================
* 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
*
* http://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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.pmmapper.config;
import java.util.Optional;
import org.onap.dcaegen2.services.pmmapper.exceptions.EnvironmentConfigException;
import org.onap.logging.ref.slf4j.ONAPLogAdapter;
import org.slf4j.LoggerFactory;
/**
* Provides external configuration for files processing
*
*/
public class FilesProcessingConfig {
private static final String ENV_LIMIT_RATE = "PROCESSING_LIMIT_RATE";
private static final int DEFAULT_LIMIT_RATE = 1;
private static final String ENV_THREADS_MULTIPLIER = "THREADS_MULTIPLIER";
private static final String ENV_PROCESSING_THREADS_COUNT = "PROCESSING_THREADS_COUNT";
private static final String ENV_VARIABLE_INCORRECT_MSG = " environment variable has incorrect value.\n";
private static final int DEFAULT_MULTIPLIER = 1;
private static final ONAPLogAdapter logger = new ONAPLogAdapter(
LoggerFactory.getLogger(FilesProcessingConfig.class));
private final EnvironmentReader environmentReader;
/**
* Creates a FilesProcessingConfig
*/
public FilesProcessingConfig(EnvironmentReader environmentReader) {
this.environmentReader = environmentReader;
}
/**
* Provides reactor limit rate value from environment variable.
* @returns value of limit rate
* @throws EnvironmentConfigException
*/
public int getLimitRate() throws EnvironmentConfigException {
logger.unwrap().info("Trying to read " + ENV_LIMIT_RATE + " env.");
try {
return Optional.ofNullable(environmentReader.getVariable(ENV_LIMIT_RATE))
.map(this::parseIntegerValue)
.orElseGet(this::getDefaultLimitRate);
} catch (NumberFormatException exception) {
throw new EnvironmentConfigException(
ENV_LIMIT_RATE + ENV_VARIABLE_INCORRECT_MSG
, exception);
}
}
/**
* Provides reactor parallel threads count from environment variable.
*
* @throws EnvironmentConfigException
* @returns value of threads count
*/
public int getThreadsCount() throws EnvironmentConfigException {
logger.unwrap().info("Attempt to read threads configuration");
int processingThreadsCount = getProcessingThreadsCount();
int threadsMultiplier = getThreadsMultiplier();
int processingThreadsAmount = processingThreadsCount * threadsMultiplier;
logger.unwrap().info(
"Processing threads configuration: Processing threads count - {}, Processing threads multiplier - {} ",
processingThreadsCount, threadsMultiplier);
logger.unwrap().info("Amount of files processing threads: {} ", processingThreadsAmount);
return processingThreadsAmount;
}
private Integer parseIntegerValue(String val) throws NumberFormatException {
Integer value = Integer.valueOf(val);
logger.unwrap().info(ENV_LIMIT_RATE + " value is: {}", value);
return value;
}
private int getDefaultLimitRate() {
logger.unwrap().info(ENV_LIMIT_RATE + " env not present. Setting limit rate to default value: " + DEFAULT_LIMIT_RATE);
return DEFAULT_LIMIT_RATE;
}
private int getThreadsMultiplier() throws EnvironmentConfigException {
try {
return Optional.ofNullable(environmentReader.getVariable(ENV_THREADS_MULTIPLIER))
.map(Integer::valueOf)
.orElseGet(this::getDefaultMultiplier);
} catch (NumberFormatException exception) {
throw new EnvironmentConfigException(
ENV_THREADS_MULTIPLIER + ENV_VARIABLE_INCORRECT_MSG, exception);
}
}
private int getDefaultMultiplier() {
logger.unwrap().info(ENV_THREADS_MULTIPLIER +
" env not present. Setting multiplier to default value: " + DEFAULT_MULTIPLIER);
return DEFAULT_MULTIPLIER;
}
private int getProcessingThreadsCount() throws EnvironmentConfigException {
try {
return Optional.ofNullable(environmentReader.getVariable(ENV_PROCESSING_THREADS_COUNT))
.map(Integer::valueOf)
.orElseGet(this::getDefaultThreadsCount);
} catch (NumberFormatException exception) {
throw new EnvironmentConfigException(
ENV_PROCESSING_THREADS_COUNT + ENV_VARIABLE_INCORRECT_MSG, exception);
}
}
private int getDefaultThreadsCount() {
int defaultThreadsCount = Runtime.getRuntime().availableProcessors();
logger.unwrap().info(ENV_PROCESSING_THREADS_COUNT +
" env not present. Setting threads count to available cores: {}", defaultThreadsCount);
return defaultThreadsCount;
}
}
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