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Do not override resolve method #1000

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Do not override resolve method #1000

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062e333
Do not override resolve method
tomas-sexenian Aug 6, 2025
a427a1c
Just one IP is enough
tomas-sexenian Aug 7, 2025
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43 changes: 17 additions & 26 deletions java/src/main/java/com/genexus/internet/HttpClientJavaLib.java
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Original file line number Diff line number Diff line change
Expand Up @@ -66,45 +66,35 @@

public class HttpClientJavaLib extends GXHttpClient {

private static class FirstIpDnsResolver implements DnsResolver {
private final DnsResolver defaultDnsResolver = new SystemDefaultDnsResolver();

@Override
public InetAddress[] resolve(final String host) throws UnknownHostException {
InetAddress[] allIps = defaultDnsResolver.resolve(host);
if (allIps != null && allIps.length > 0) {
return new InetAddress[]{allIps[0]};
}
return allIps;
private static final DnsResolver FIRST_IP_DNS_RESOLVER = host -> {
InetAddress[] allIps = SystemDefaultDnsResolver.INSTANCE.resolve(host);
if (allIps != null && allIps.length > 0) {
return new InetAddress[]{allIps[0]};
}
}
return allIps;
};

private static String getGxIpResolverConfig() {
private static boolean isFirstIpDnsEnabled() {
String name = "GX_USE_FIRST_IP_DNS";
String gxDns = System.getProperty(name);
if (gxDns == null || gxDns.trim().isEmpty()) {
gxDns = System.getenv(name);
}
if (gxDns != null && gxDns.trim().equalsIgnoreCase("true")) {
return gxDns.trim();
} else {
return null;
}
return gxDns != null && gxDns.trim().equalsIgnoreCase("true");
}


public HttpClientJavaLib() {
getPoolInstance();
ConnectionKeepAliveStrategy myStrategy = generateKeepAliveStrategy();
HttpClientBuilder builder = HttpClients.custom()
.setConnectionManager(connManager)
.setConnectionManagerShared(true)
.setKeepAliveStrategy(myStrategy);
if (getGxIpResolverConfig() != null) {
builder.setDnsResolver(new FirstIpDnsResolver());
if (isFirstIpDnsEnabled()) {
builder.setDnsResolver(FIRST_IP_DNS_RESOLVER);
}
httpClientBuilder = builder;
cookies = new BasicCookieStore();
cookies = new BasicCookieStore();
streamsToClose = new Vector<>();
}

Expand All @@ -114,10 +104,11 @@ private static void getPoolInstance() {
RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", PlainConnectionSocketFactory.INSTANCE).register("https", getSSLSecureInstance())
.build();
boolean useCustomDnsResolver = getGxIpResolverConfig() != null;
PoolingHttpClientConnectionManager connManager = useCustomDnsResolver
? new PoolingHttpClientConnectionManager(socketFactoryRegistry, new FirstIpDnsResolver())
: new PoolingHttpClientConnectionManager(socketFactoryRegistry);
if (isFirstIpDnsEnabled()) {
connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry, FIRST_IP_DNS_RESOLVER);
} else {
connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
}
connManager.setMaxTotal((int) CommonUtil.val(clientCfg.getProperty("Client", "HTTPCLIENT_MAX_SIZE", "1000")));
connManager.setDefaultMaxPerRoute((int) CommonUtil.val(clientCfg.getProperty("Client", "HTTPCLIENT_MAX_PER_ROUTE", "1000")));

Expand Down Expand Up @@ -675,7 +666,7 @@ public void execute(String method, String url) {
resetStateAdapted();
}
}

private synchronized void displayHTTPConnections(){
Iterator<HttpRoute> iterator = storedRoutes.iterator();
while (iterator.hasNext()) {
Expand Down
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