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How can I pass the value I get from a class to another class?

Currently I'm doing a program which retrieve the Azure Client ID and Secret Value through key-vault.
Below is the logic that my friend and I make to get the value, my question is how can I take the value that I got in the static void main and pass to another class for use? I had no idea how to reuse the value I get in another class. Please teach me.
public class SecretReceiver {
private static SecretClient secretClient;
public static final String AZURE_CLIENT_ID="AZURE_CLIENT_ID";
public static final String AZURE_CLIENT_SECRET="AZURE_CLIENT_SECRET";
public static final String AZURE_TENANT_ID="AZURE_TENANT_ID";
public static final String AZURE_KEY_VAULT_NAME="AZURE_KEY_VAULT_NAME";
private static final String KEY_VAULT_URL = "https://%s.vault.azure.net";
private static void secretReceiverBuilder() {
if (secretClient == null) {
String keyVaultUrl = String.format(KEY_VAULT_URL, getProperty(AZURE_KEY_VAULT_NAME, ""));
secretClient = new SecretClientBuilder()
.vaultUrl(keyVaultUrl)
.credential(new ClientSecretCredentialBuilder()
.clientId(getProperty(AZURE_CLIENT_ID, ""))
.clientSecret(getProperty(AZURE_CLIENT_SECRET, ""))
.tenantId(getProperty(AZURE_TENANT_ID, ""))
.build())
.buildClient();
}
}
public static void loadConfigFileAndSetEnv(String filePath) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(new File(filePath))))) {
String line = null;
while ((line = reader.readLine()) != null) {
String[] split = line.split("=");
if (split.length > 1) {
String key = split[0].trim();
String value = split[1].trim();
if (key.contains(AZURE_CLIENT_ID)) {
System.setProperty(AZURE_CLIENT_ID, value);
continue;
}
if (key.contains(AZURE_CLIENT_SECRET)) {
System.setProperty(AZURE_CLIENT_SECRET, value);
continue;
}
if (key.contains(AZURE_TENANT_ID)) {
System.setProperty(AZURE_TENANT_ID, value);
continue;
}
if (key.contains(AZURE_KEY_VAULT_NAME)) {
System.setProperty(AZURE_KEY_VAULT_NAME, value);
}
}
}
} catch (Exception e) {
log.error("Load file : {} error.", filePath, e);
}
}
public static String getProperty(String key, String defaultValue) {
String value = System.getProperty(key);
if (StringUtils.isBlank(value)) {
value = System.getenv(key);
}
return StringUtils.isBlank(value) ? defaultValue : value;
}
public static void main() throws Exception {
//getUatAKV();
loadConfigFileAndSetEnv("C:script\\key_vault.conf");
String username = getSecretByKey("client-secret-name");
String secret = getSecretByKey("client-secret");
System.out.println("This is client id: " + username);
System.out.println("This is client secret: " + secret);
}
public static String getSecretByKey(String name) {
if (secretClient == null) {
secretReceiverBuilder();
}
return secretClient.getSecret(name).getValue();
}

Try the following code:
// Create static variable in a Class
public class Global {
public static String USER_NAME ="";
public static String SECRET ="";
}
// Set the value in your main function
String username = getSecretByKey("client-secret-name");
String secret = getSecretByKey("client-secret");
Global.USER_NAME = username;
Global.SECRET = secret;
// Get value in another class
System.out.println("This is client id: " + Global.USER_NAME);
System.out.println("This is client secret: " + Global.SECRET);

GraphQL Error: Expected a user-defined GraphQL scalar type with name 'FileUpload' but found none

for several days I have been trying to implement the upload file in Java-GraphQL. I found this topic: How to upload files with graphql-java? I implemented second solutions.
public class FileUpload {
private String contentType;
private byte[] content;
public FileUpload(String contentType, byte[] content) {
this.contentType = contentType;
this.content = content;
}
public String getContentType() {
return contentType;
}
public byte[] getContent() {
return content;
}
}
public class MyScalars {
public static final GraphQLScalarType FileUpload = new GraphQLScalarType(
"FileUpload",
"A file part in a multipart request",
new Coercing<FileUpload, Void>() {
#Override
public Void serialize(Object dataFetcherResult) {
throw new CoercingSerializeException("Upload is an input-only type");
}
#Override
public FileUpload parseValue(Object input) {
if (input instanceof Part) {
Part part = (Part) input;
try {
String contentType = part.getContentType();
byte[] content = new byte[part.getInputStream().available()];
part.delete();
return new FileUpload(contentType, content);
} catch (IOException e) {
throw new CoercingParseValueException("Couldn't read content of the uploaded file");
}
} else if (null == input) {
return null;
} else {
throw new CoercingParseValueException(
"Expected type " + Part.class.getName() + " but was " + input.getClass().getName());
}
}
#Override
public FileUpload parseLiteral(Object input) {
throw new CoercingParseLiteralException(
"Must use variables to specify Upload values");
}
});
}
public class FileUploadResolver implements GraphQLMutationResolver {
public Boolean uploadFile(FileUpload fileUpload) {
String fileContentType = fileUpload.getContentType();
byte[] fileContent = fileUpload.getContent();
// Do something in order to persist the file :)
return true;
}
}
scalar FileUpload
type Mutation {
uploadFile(fileUpload: FileUpload): Boolean
}
I get this error during compilation:
Caused by: com.coxautodev.graphql.tools.SchemaClassScannerError: Expected a user-defined GraphQL scalar type with name 'FileUpload' but found none!

Have you registered it via RuntimeWiring?
Take a look here: Custom Scalar in Graphql-java

You have to extend GraphQLScalarType in your MyScalars class

Read JSON Nested element using reflection without using JsonFactory or ObjectMapper

[Unable to access property of another object stored in Arraylist]
I am creating an function to get JSON input in object from RESTful Web service input and format it again in JSON format to call other web service.
I have limitation that I can not use any JSON API for object mapping hence using Java reflection core API.
I am able to create JSON format from Input for simple elements but unable to access nested elements (another user defined POJO class ). I am using arraylist.
Input
{
"GenesisIncidents": {
"service": "Transmission",
"affectedCI": "22BT_ORNC03",
"opt_additionalAffectedItems": [
{
"itemType": "NODE-ID",
"ItemName": "22BT_ORNC03"
},
{
"ItemType": "CCT",
"ItemName": "A_circuit_id"
}]
}
}
GenesisIncidents.class
import java.util.ArrayList;
import java.util.Date;
public class GenesisIncidents {
private String service;
private String affectedCI;
private ArrayList<AdditionalAffectedItems> opt_additionalAffectedItems;
public GenesisIncidents(){}
public String getService() {
return service;
}
public void setService(String service) {
this.service = service;
}
public String getAffectedCI() {
return affectedCI;
}
public void setAffectedCI(String affectedCI) {
this.affectedCI = affectedCI;
}
public ArrayList<AdditionalAffectedItems> getOpt_additionalAffectedItems() {
return opt_additionalAffectedItems;
}
public void setOpt_additionalAffectedItems(ArrayList<AdditionalAffectedItems> opt_additionalAffectedItems) {
this.opt_additionalAffectedItems = opt_additionalAffectedItems;
}
}
AdditionalAffectedItems.class
public class AdditionalAffectedItems {
private String itemType;
private String itemName;
public AdditionalAffectedItems(){
super();
}
public String getItemType() {
return itemType;
}
public void setItemType(String itemType) {
this.itemType = itemType;
}
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
}
Implemetation
public void updateTicketExt(GenesisIncidents genesisIncidents) {
try{
Field allFields[]=genesisIncidents.getClass().getDeclaredFields();
Method allMethods[] = genesisIncidents.getClass().getDeclaredMethods();
String jsonString ="{\r\n \""+genesisIncidents.getClass().getName().toString().substring(48)+"\": {";
final String preStr="\r\n \""; //To create a JSON object format.
final String postStr="\": "; //To create a JSON object format.
int totalNoOfFields=allFields.length;
for (Field field : allFields) {
System.out.println(field.getType());
String getter="get"+StringUtils.capitalize(field.getName());
Method method= genesisIncidents.getClass().getMethod(getter, null);
try{
if(field.getType().toString().contains("Integer"))
jsonString=jsonString + preStr + field.getName() + postStr +method.invoke(genesisIncidents).toString()+",";
else
jsonString=jsonString + preStr + field.getName() + postStr +"\""+method.invoke(genesisIncidents).toString()+"\",";
if(field.getType().toString().contains("ArrayList")){
System.out.println("ArrayListElement found");
genesisIncidents.getOpt_additionalAffectedItems().forEach(obj->{System.out.println(obj.getItemName());});
//convertArrayToJSON(field, genesisIncidents);
}
}catch(NullPointerException npe)
{
System.out.println("Null value in field.");
continue;
}
}
jsonString=jsonString.substring(0,jsonString.length()-1);
jsonString=jsonString+"\r\n }\r\n }";
System.out.println("\n"+jsonString);
}catch(Exception jex){
jex.printStackTrace();
}
}
My below code line is unable to access object stored under array list.
genesisIncidents.getOpt_additionalAffectedItems().forEach(obj->{System.out.println(obj.getItemName());});
OUTPUT
karaf#root>class java.lang.String
class java.lang.String
class java.lang.String
class java.util.ArrayList
ArrayListElement found
null
null
{
"GenesisIncidents": {
"service": "Transmission",
"affectedCI": "22BT_ORNC03",
"opt_additionalAffectedItems": " [org.apache.servicemix.examples.camel.rest.model.AdditionalAffectedItems#5881a 895, org.apache.servicemix.examples.camel.rest.model.AdditionalAffectedItems#399b4e eb]"
}
}

I have fiddled around with your example I have managed to get it working. This will produce the correct JSON string by passing in an instance of a GenesisIncident object. I guess that there is much room for improvement here but this can serve as an example.
public static String genesisToJson(GenesisIncidents incidents) {
try{
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.append("{\r\n \"")
.append(incidents.getClass().getSimpleName())
.append("\": {");
Field allFields[] = incidents.getClass().getDeclaredFields();
for (Field field : allFields) {
String getter = getGetterMethod(field);
Method method = incidents.getClass().getMethod(getter, null);
try{
if(field.getType().isAssignableFrom(Integer.class)) {
jsonBuilder.append(preStr).append(field.getName()).append(postStr)
.append(method.invoke(incidents).toString()).append(",");
} else if (field.getType().isAssignableFrom(String.class)) {
jsonBuilder.append(preStr).append(field.getName()).append(postStr).append("\"")
.append(method.invoke(incidents).toString()).append("\",");
} else if (field.getType().isAssignableFrom(List.class)) {
System.out.println("ArrayListElement found");
getInnerObjectToJson(field, incidents.getOptItems(), jsonBuilder);
}
} catch(NullPointerException npe) {
System.out.println("Null value in field.");
continue;
}
}
jsonBuilder.append("\r\n } \r\n }");
return jsonBuilder.toString();
}catch(Exception jex){
jex.printStackTrace();
}
return null;
}
private static void getInnerObjectToJson(Field field, List<AdditionalAffectedItems> items, StringBuilder builder)
throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
builder.append(preStr).append(field.getName()).append(postStr).append("[");
for (var item : items) {
var fields = List.of(item.getClass().getDeclaredFields());
builder.append("{");
for (var f : fields) {
String getter = getGetterMethod(f);
Method method = item.getClass().getMethod(getter, null);
builder.append(preStr).append(f.getName()).append(postStr).append("\"")
.append(method.invoke(item).toString()).append("\"");
if (!(fields.indexOf(f) == (fields.size() - 1))) {
builder.append(",");
}
}
if (items.indexOf(item) == (items.size() - 1)) {
builder.append("}\r\n");
} else {
builder.append("},\r\n");
}
}
builder.append("]");
}
private static String getGetterMethod(Field field) {
return "get" + StringUtils.capitalize(field.getName());
}

c# Marshal structure equivalent of java

I would like to create that object same for java. Is it possible to create it?
How it works :
you can find more informaiton how I used it.
using System;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
using Common.Models;
using System.Text;
namespace Common.Utilities.Helpers
{
public partial class CommareaHelper
{
public static T StringToObject<T>(string buffer)
{
IntPtr pBuf = IntPtr.Zero;
try
{
pBuf = Marshal.StringToBSTR(buffer);
return (T)Marshal.PtrToStructure(pBuf, typeof(T));
}
catch
{
throw;
}
finally
{
pBuf = IntPtr.Zero;
}
}
public static string ObjectToString(Object conversionObject)
{
int size = 0;
IntPtr pBuf = IntPtr.Zero;
try
{
size = Marshal.SizeOf(conversionObject);
pBuf = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(conversionObject, pBuf, false);
return Marshal.PtrToStringAuto(pBuf, size).Substring(0, size/2);
}
catch
{
throw;
}
finally
{
Marshal.FreeHGlobal(pBuf);
}
}
}
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public class Comarea
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1)]
private string status;
public string Status
{
get
{
return new string(status).Trim();
}
set
{
status = value.ToFixedCharArray(1, true);
}
}
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 5)]
private string operationName;
public string OperationName
{
get
{
return new string(operationName).Trim();
}
set
{
operationName = value.ToFixedCharArray(5, true);
}
}
}
I can fill any object using single line of string and opposite of that operation
string commareaStr = "0TR231";
Commarea commarea = CommareaHelper.StringToObject<Commarea>(commareaStr);

How to encapsulate the logic of parametrized messages?

I'm using java.util.resourcebundle to format my JSTL messages and this works fine:
I use the class MessageFormat you can see here. Now I want to encapsulate this to a method that is just getParametrizedMessage(String key, String[]parameters) but I'm not sure how to do it. Now there is quite a lot of work to display just one or two messages with parameters:
UserMessage um = null;
ResourceBundle messages = ResourceBundle.getBundle("messages");
String str = messages.getString("PF1");
Object[] messageArguments = new String[]{nyreg.getNummer()};
MessageFormat formatter = new MessageFormat("");
formatter.applyPattern(messages.getString("PI14"));
String outputPI14 = formatter.format(messageArguments);
formatter.applyPattern(messages.getString("PI15"));
String outputPI15 = formatter.format(messageArguments)
if(ipeaSisFlag)
if(checkIfPCTExistInDB && nyreg.isExistInDB()) {
//um = new ExtendedUserMessage(MessageHandler.getParameterizedMessage("PI15", new String[]{nyreg.getNummer()}) , UserMessage.TYPE_INFORMATION, "Info");
um = new ExtendedUserMessage(outputPI15 , UserMessage.TYPE_INFORMATION, "Info");
…and so on. Now can I move this logic to a static class MessageHandler.getParameterizedMessage that now is not working and looking like this:
private final static String dictionaryFileName="messages.properties";
public static String getParameterizedMessage(String key, String [] params){
if (dictionary==null){
loadDictionary();
}
return getParameterizedMessage(dictionary,key,params);
}
private static void loadDictionary(){
String fileName = dictionaryFileName;
try {
dictionary=new Properties();
InputStream fileInput = MessageHandler.class.getClassLoader().getResourceAsStream(fileName);
dictionary.load(fileInput);
fileInput.close();
}
catch(Exception e) {
System.err.println("Exception reading propertiesfile in init "+e);
e.printStackTrace();
dictionary=null;
}
}
How can I make using my parametrized messages as easy as calling a method with key and parameter?
Thanks for any help
Update
The logic comes from an inherited method that in in the abstract class that this extends. The method looks like:
protected static String getParameterizedMessage(Properties dictionary,String key,String []params){
if (dictionary==null){
return "ERROR";
}
String msg = dictionary.getProperty(key);
if (msg==null){
return "?!Meddelande " +key + " saknas!?";
}
if (params==null){
return msg;
}
StringBuffer buff = new StringBuffer(msg);
for (int i=0;i<params.length;i++){
String placeHolder = "<<"+(i+1)+">>";
if (buff.indexOf(placeHolder)!=-1){
replace(buff,placeHolder,params[i]);
}
else {
remove(buff,placeHolder);
}
}
return buff.toString();
}
I think I must rewrite the above method in order to make it work like a resourcebundle rather than just a dictionary.
Update 2
The code that seems to work is here
public static String getParameterizedMessage(String key, Object [] params){
ResourceBundle messages = ResourceBundle.getBundle("messages");
MessageFormat formatter = new MessageFormat("");
formatter.applyPattern(messages.getString(key));
return formatter.format(params);
}

I'm not really sure what you're trying to achive, here's what I did in the past:
public static final String localize(final Locale locale, final String key, final Object... param) {
final String name = "message";
final ResourceBundle rb;
/* Resource bundles are cached internally,
never saw a need to implement another caching level
*/
try {
rb = ResourceBundle.getBundle(name, locale, Thread.currentThread()
.getContextClassLoader());
} catch (MissingResourceException e) {
throw new RuntimeException("Bundle not found:" + name);
}
String keyValue = null;
try {
keyValue = rb.getString(key);
} catch (MissingResourceException e) {
// LOG.severe("Key not found: " + key);
keyValue = "???" + key + "???";
}
/* Message formating is expensive, try to avoid it */
if (param != null && param.length > 0) {
return MessageFormat.format(keyValue, param);
} else {
return keyValue;
}
}