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package org.sentrysoftware.metricshub.engine.strategy.source;
/*-
* ╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲
* MetricsHub Engine
* ჻჻჻჻჻჻
* Copyright 2023 - 2024 Sentry Software
* ჻჻჻჻჻჻
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see .
* ╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱
*/
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.stream.Collectors;
import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Builder.Default;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.sentrysoftware.metricshub.engine.common.JobInfo;
import org.sentrysoftware.metricshub.engine.connector.model.monitor.task.source.Source;
/**
* The OrderedSources class is responsible for building a list of ordered sources based on either the
* execution order or the source dependency tree. It includes methods for ordering and validating the sources.
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
@AllArgsConstructor
@Builder
@Slf4j
public class OrderedSources {
@Getter
@Default
private List sources = new ArrayList<>();
/**
* The OrderedSourcesBuilder class extends the generated builder for additional methods related to
* building the list of ordered sources.
*
* @see OrderedSources
*/
public static class OrderedSourcesBuilder {
/**
* Build the list of ordered sources using the execution order or
* the source dependency tree.
*
* @param sources Map of source instances
* @param executionOrder The source order defined by the connector
* @param sourceDepTree The source dependency tree this is built by the compiler on each monitor's job
* @param jobInfo Information about the job (discovery, collect, etc.) used for logging
* @return this {@link OrderedSourcesBuilder}
*/
public OrderedSourcesBuilder sources(
final Map sources,
final List executionOrder,
final List> sourceDepTree,
final JobInfo jobInfo
) {
if (sources == null || sources.isEmpty()) {
this.sources$value = new ArrayList<>();
this.sources$set = true;
return this;
}
if (executionOrder != null && !executionOrder.isEmpty()) {
return orderSources(sources, executionOrder, "execution order", jobInfo);
} else if (sourceDepTree != null && !sourceDepTree.isEmpty()) {
return orderSources(
sources,
sourceDepTree.stream().flatMap(Collection::stream).collect(Collectors.toList()), // NOSONAR
"dependency tree",
jobInfo
);
}
this.sources$value = sources.values().stream().collect(Collectors.toList()); // NOSONAR
this.sources$set = true;
return this;
}
/**
* Order the given source map based on the provided order
*
* @param sources Map of source instances
* @param order The order list of the sources, this order list contains the name of each source
* @param orderDescription Description used for logging in case of errors
* @param jobInfo Information about the job (discovery, collect, etc.) used for logging
* @return this {@link OrderedSourcesBuilder}
*/
OrderedSourcesBuilder orderSources(
final Map sources,
final List order,
final String orderDescription,
final JobInfo jobInfo
) {
if (order.size() != sources.size()) {
final String message = String.format(
"Hostname %s - The %s size (%d) is not equals to the sources size (%d)." +
" The sources will not be processed. Context: connector %s, monitor type: %s, job: %s.",
jobInfo.getHostname(),
orderDescription,
order.size(),
sources.size(),
jobInfo.getConnectorId(),
jobInfo.getMonitorType(),
jobInfo.getJobName()
);
log.error(message);
throw new IllegalStateException(message);
}
this.sources$value =
sources
.entrySet()
.stream()
.sorted(Comparator.comparing(entry -> findSourcePosition(entry.getKey(), order, orderDescription, jobInfo)))
.map(Entry::getValue)
.collect(Collectors.toList()); // NOSONAR
this.sources$set = true;
return this;
}
/**
* Find the position of the first occurrence of the specified source name in the order list
*
* @param sourceName The name of the source to find used
* @param order The order list of the sources, this order list contains the name of each source
* @param orderDescription Description used for logging in case of errors
* @param jobInfo Information about the job (discovery, collect, etc.) used for logging
* @return int value
*/
int findSourcePosition(
final String sourceName,
final List order,
final String orderDescription,
final JobInfo jobInfo
) {
final int index = order.indexOf(sourceName);
if (index == -1) {
final String message = String.format(
"Hostname %s - The source (%s) listed in the %s is not defined." +
" The sources will not be processed. Context: connector %s, monitor type: %s, job: %s.",
jobInfo.getHostname(),
sourceName,
orderDescription,
jobInfo.getConnectorId(),
jobInfo.getMonitorType(),
jobInfo.getJobName()
);
log.error(message);
throw new IllegalStateException(message);
}
return index;
}
}
}
