OZG-3322 load cert file programmatically

user-manager-server/src/main/java/de/itvsh/kop/user/MongodbCertificateLoader.java

+package de.itvsh.kop.user;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateException;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.event.Observes;
+
+import org.apache.commons.io.IOUtils;
+import org.eclipse.microprofile.config.inject.ConfigProperty;
+
+import io.quarkus.runtime.StartupEvent;
+
+@ApplicationScoped
+class MongodbCertificateLoader {
+
+	@ConfigProperty(defaultValue = "/certs/pluto-database-tls-cert.crt")
+	String mongoDbCaCert;
+
+	void onStart(@Observes StartupEvent ev) throws KeyStoreException, CertificateException, IOException, NoSuchAlgorithmException {
+		System.out.println("loading cert...");
+		KeyStore keystore = KeyStore.getInstance("pkcs12");
+		keystore.load(IOUtils.toInputStream(mongoDbCaCert, Charset.defaultCharset()), null);
+		System.out.println("cert loaded");
+	}
+}