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Add default values for missing environment variables #1766

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Merged
merged 1 commit into from
Jun 17, 2025
+48 −10
Merged

Add default values for missing environment variables #1766

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58 changes: 48 additions & 10 deletions ...ain/src/main/java/org/lowcoder/domain/serversetting/service/ServerSettingServiceImpl.java
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Original file line number Diff line number Diff line change
@@ -1,21 +1,29 @@
package org.lowcoder.domain.serversetting.service;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.lowcoder.domain.serversetting.model.ServerSetting;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.*;
import org.springframework.stereotype.Service;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import javax.annotation.PostConstruct;
import java.util.List;
import java.util.Map;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;


@RequiredArgsConstructor
@Slf4j
@Service
public class ServerSettingServiceImpl implements ServerSettingService {

private final Environment environment;
private final ServerSettingRepository repository;

private final List<String> EXCLUDED_KEYS = List.of("LOWCODER_MONGODB_EXPOSED",
"LOWCODER_PUID",
"LOWCODER_PGID",
Expand All @@ -33,21 +41,25 @@ public class ServerSettingServiceImpl implements ServerSettingService {
"LOWCODER_NODE_SERVICE_SECRET",
"LOWCODER_NODE_SERVICE_SECRET_SALT");

@Autowired
public ServerSettingServiceImpl(ServerSettingRepository repository) {
this.repository = repository;
}

@Override
public Mono<Map<String, String>> getServerSettingsMap() {
return repository.findAll().collectMap(ServerSetting::getKey, ServerSetting::getValue);
}

@PostConstruct
public void saveEnvironmentVariables() {
Map<String, String> envVariables = System.getenv();
Flux.fromIterable(envVariables.keySet())
.filter(key -> key.startsWith("LOWCODER_"))

Map<String, String> defaults = getEnvironmentVariablesDefaults();

Map<String, String> envVariables = new TreeMap<>(System.getenv().entrySet().stream()
.filter(entry -> StringUtils.startsWith(entry.getKey(), "LOWCODER_"))
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue)));

Map<String, String> merged = new TreeMap<>(defaults);
merged.keySet().removeAll(envVariables.keySet());
merged.putAll(envVariables);

Flux.fromIterable(merged.keySet())
.map(key -> {
String value = envVariables.getOrDefault(key, "");
if(EXCLUDED_KEYS.contains(key)) {
Expand All @@ -61,4 +73,30 @@ public void saveEnvironmentVariables() {
.flatMap(repository::save)
.subscribe();
}


private Map<String, String> getEnvironmentVariablesDefaults() {
Map<String, String> defaults = new HashMap<>();

MutablePropertySources propertySources = ((AbstractEnvironment) environment).getPropertySources();
StreamSupport.stream(propertySources.spliterator(), false)
.filter(EnumerablePropertySource.class::isInstance)
.map(EnumerablePropertySource.class::cast)
.forEach(propertySource -> {
String[] names = propertySource.getPropertyNames();
if (names.length > 0) {
Arrays.stream(names).forEach(name -> {
String rawValue = Objects.toString(propertySource.getProperty(name), "");
if (rawValue != null && StringUtils.contains(rawValue, "${LOWCODER_")) {
String defaultValue = StringUtils.substringBetween(rawValue, "${", "}");
String[] keyValue = StringUtils.split(defaultValue, ":");
if (keyValue.length == 2 && !defaults.containsKey(keyValue[0])) {
defaults.put(keyValue[0], keyValue[1]);
}
}
});
}
});
return defaults;
}
}
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