I'm newly with Guice.
I want to use Guice for initializing object without writing new directly.
Here is my main():
public class VelocityParserTest {
public static void main(String[] args) throws IOException {
try {
PoenaRequestService poenaService = new PoenaRequestService();
System.out.println(poenaService.sendRequest("kbkCode"));
} catch (PoenaServiceException e) {
e.printStackTrace();
}
}
}
PoenaRequestService:
public class PoenaRequestService {
private static final String TEMPLATE_PATH = "resources/xml_messages/bp12/message01.xml";
public static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(PoenaRequestService.class);
#Inject
#Named("poena_service")
private HttpService poenaService;
public String sendRequest(/*TaxPayer taxPayer,*/ String kbk) throws PoenaServiceException {
LOG.info(String.format("Generating poena message request for string: %s", kbk));
Map<String, String> replaceValues = new HashMap<>();
replaceValues.put("guid", "guid");
replaceValues.put("iinbin", "iinbin");
replaceValues.put("rnn", "rnn");
replaceValues.put("taxOrgCode", "taxOrgCode");
replaceValues.put("kbk", "kbk");
replaceValues.put("dateMessage", "dateMessage");
replaceValues.put("applyDate", "applyDate");
ServiceResponseMessage result;
try {
String template = IOUtils.readFileIntoString(TEMPLATE_PATH);
Document rq = XmlUtil.parseDocument(StringUtils.replaceValues(template, replaceValues));
result = poenaService.execute(HttpMethod.POST, null, rq);
} catch (IOException e) {
throw new PoenaServiceException("Unable to read template file: " + TEMPLATE_PATH, e);
} catch (SAXException e) {
throw new PoenaServiceException("Unable to parse result document, please check template file: " + TEMPLATE_PATH, e);
} catch (HttpServiceException e) {
throw new PoenaServiceException(e);
}
if (result.isSuccess()) {
return (String) result.getResult();
}
throw new PoenaServiceException("HTTP service error code '" + result.getStatusCode() + "', message: " + result.getStatusMessage());
}
}
When I tried to debug this I see next picture:
As e result I got NullPointerException.
I couldn't figure out this behavior. Why does this exactly happen?
Any suggestions?
It's not working because you're not actually using Guice. You need to create an injector and bind your dependencies to something. Something akin to this:
public class VelocityParserTest {
public static void main(String[] args) throws IOException {
Injector injector = Guice.createInjector(new AbstractModule() {
#Override
protected void configure() {
bind(PoenaRequestService.class).asEagerSingleton();
bind(HttpService.class)
.annotatedWith(Names.named("poena_service"))
.toInstance(...);
}
});
try {
PoenaRequestService poenaService = injector.getInstance(PoenaRequestService.class);
System.out.println(poenaService.sendRequest("kbkCode"));
} catch (PoenaServiceException e) {
e.printStackTrace();
}
}
}
Related
here is the code for which I want to write a test case for catch block
public class X {
protected String getInputString(final String inputPath) {
try {
return Resources.asCharSource(Resources.getResource(inputPath), UTF_8).read();
} catch (final IOException e) {
log.error("Error loading partner aliases from local config", e);
throw new UncheckedIOException(e);
}
}
}
have tried mocking the staic method asCharSource as bellow:
#Test
public void Failed() throws Exception{
URL url = Resources.getResource("resources/linearPartners.json");
CharSource s;
try{
s = new CharSource() {
#Override
public Reader openStream() throws IOException {
throw new IOException("Expected as a test");
}
#Override
public String read() throws IOException {
throw new IOException("Expected as a test");
}
};
try (MockedStatic<Resources> resources = Mockito.mockStatic(Resources.class)) {
resources.when(() -> Resources.asCharSource(url, UTF_8))
.thenReturn(s);
Assertions.assertThrows(UncheckedIOException.class, () -> staticConfigPartnerAliasesPersistenceFacade.getInputString("resources/file.json"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
bellow is the error
org.opentest4j.AssertionFailedError: Unexpected exception type thrown ==> expected: <java.io.UncheckedIOException> but was: <java.lang.NullPointerException>
[java] org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:65)
[java] org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:37)
[java] org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:3082)
I did not understand, where is the NullPointerException is coming from. Please guide me on this
I need to write a test to verify that when an IOException is thrown by the private method_C, Method_B returns True.
But
public final class A{
public static Boolean Method_B(){
try{
//call a private method C which throws IOException
Method_C
}
catch(final IOException e) {
return Boolean.True
}
}
private static Method_C() throws IOException {
return something;
}
What I tried:
#Test
public void testSomeExceptionOccured() throws IOException {
A Amock = mock(A.class);
doThrow(IOException.class).when(Amock.Method_C(any(),any(),any(),any()));
Boolean x = A.Method_B(some_inputs);
Assert.assertEquals(Boolean.TRUE, x);
}
I am getting compilation errors :
1.Cannot mock a final class
2. Method_C has private access in A
Any suggestions on how this can be rectified?
you are required to use finally in try catch
import java.io.*;
public class Test {
public static Boolean Method_B() {
try {
System.out.println("Main working going..");
File file = new File("./nofile.txt");
FileInputStream fis = new FileInputStream(file);
} catch (IOException e) {
// Exceptiona handling
System.out.println("No file found ");
} catch (Exception e) {
// Exceptiona handling
System.out.println(e);
} finally {
return true;
}
}
public static void main(String args[]) {
if (Test.Method_B()) {
System.out.println("Show true ans");
} else {
System.out.println("Sorry error occure");
}
}
}
I'm trying to create an object in one class then use that object in another class but each time I try to use it it just says the value is null
Customer cus = new Customer();
ServerSocket s = null;
public AddCustomer() {
}
public void getCustomerDetail() {
String back = " ";
{
try {
s = new ServerSocket(5433);
} catch (IOException e) {
System.out.println("Error:" + e.getMessage());
System.exit(0);
}
while (back.equals(" ")) {
try {
Socket s1 = s.accept();
System.out.println("Connection established at port 5433");
InputStream is = s1.getInputStream();
ObjectInputStream dis = new ObjectInputStream(is);
System.out.println("Getting data...");
cus = (Customer)dis.readObject();
System.out.println(cus.toString());
System.out.println(cus.getName());
dis.close();
s1.close();
System.out.println("Connection closed.");
} catch (ConnectException connExcep) {
System.out.println("1Error: " + connExcep.getMessage());
} catch (IOException ioExcep) {
System.out.println("2Error: " + ioExcep.getMessage());
} catch (Exception e) {
System.out.println("3Error: " + e.getMessage());
}
new AddCustomer().addCustomerToDB();
}
}
}
public void addCustomerToDB() {
System.out.println("start ");
Connection connection = null;
Statement statement = null;
int check = 1;
System.out.println(cus.getName()+"dadawd");
}
When I print out the value of cus.getName() it just gives me null but when I print it out in getCustomerDetail it gives me the correct value.
dis.readObject returns an object with the values in it.
Depends on what you are doing in the getName function and in the constructor.
Maybe in getCustomerDetails() you are setting the values in the input stream. But the default constructor doesn't do anything with name variable.
It looks like the issue of packaging. Try below code.
public class AddCustomer {
public static void main(String[] args) {
new AddCustomer().getCustomerDetail();
}
Customer cus = new Customer();
public void getCustomerDetail() {
String back = " ";
{
while (back.equals(" ")) {
try {
System.out.println(cus.toString());
System.out.println(cus.getName());
System.out.println("Connection closed.");
} catch (Exception e) {
System.out.println("3Error: " + e.getMessage());
}
new AddCustomer().addCustomerToDB();
break;
}
}
}
public void addCustomerToDB() {
System.out.println(cus.getName()+"dadawd");
}
}
class Customer{
private String name="ABC";
String getName() {
return name;
}
}
We found here one issue you have to create "Customer cus = new Customer();" this object under main() function like as
public class AddCustomer {
public static void main(String[] args) {
Customer cus = new Customer();
new AddCustomer().getCustomerDetail();
}
I try to implement a remote stateless bean. For the methods in this bean, the return values can be correctly returned. However, for "println" in these methods cannot print any thing to the console.
The interface is
public interface HelloWorld {
public void SayHelloWorld(String name);
public String SayHello(String name);
}
The implementation is
#Stateless
#Remote(HelloWorld.class)
public class HelloWorldBean implements HelloWorld {
#Override
public void SayHelloWorld(String name) {
System.out.println(name + " say hello to the world!");
}
#Override
public String SayHello(String nameString) {
System.out.println("This is SayHello()");
return nameString;
}
}
The client is
public class HelloWorldTest {
public static void main(String[] args) {
try {
FileInputStream inputStream = new FileInputStream("ejb.properties");
Properties pro = new Properties();
pro.load(inputStream);
InitialContext icContext = new InitialContext(pro);
HelloWorld hw = (HelloWorld) icContext.lookup("ejb/HelloWorldBean!com.ejbinterface.HelloWorld");
hw.SayHelloWorld("tom");
String aa = hw.SayHello("tom");
System.out.println(aa);
} catch (NamingException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
I do not know why the println in method "SayHelloWorld" and "SayHello" is not executed. However, the variable "aa"(in client) correctly get the return value.
It prints to the console of the server (or, if redirected, to some log file - but this is merely a configuration issue). Just look for the output, if the methods get executed, then the output is there.
Run the main function in File2 , the problem is : threads stuck at "rval=MVEL.executeExpression(compiledExpression, vars);" , 10 threads run in sequential order, not parallel , I wanna know why this happened.
PS: I'm using MVEL 2.2 , the latest version
File1:MVELHelper.java
public class MVELHelper {
private static ParserContext _ctx = new ParserContext(false);
//public static Object execute(String expression, Map<String, Object> vars, Databus databus) throws Exception {
public static Object execute(String expression, Map<String, Object> vars) throws Exception {
Object rval = null;
try {
if(vars == null) {
rval = MVEL.eval(expression, new HashMap<String,Object>());
}
else {
rval = MVEL.eval(expression, vars);
}
return rval;
}
catch(Exception e) {
throw new Exception("MVEL FAILED:"+expression,e);
}
}
public static Serializable compile(String text, ParserContext ctx)
throws Exception {
if(ctx == null) {
//ctx = _ctx;
ctx=new ParserContext(false);
}
Serializable exp = null;
try {
exp = MVEL.compileExpression(text, ctx);
//exp = MVEL.compileExpression(text);
}
catch (Exception e) {
throw new Exception("failed to compile expression.", e);
}
return exp;
}
public static Object compileAndExecute(String expression, Map<String, Object> vars) throws Exception {
Object rval = null;
try {
Serializable compiledExpression=compile(expression,null);
System.out.println("[COMPILE OVER, Thread Id="+Thread.currentThread().getId()+"] ");
if(vars == null) {
rval=MVEL.executeExpression(compiledExpression, new HashMap<String,Object>());
//rval = MVEL.eval(exp, new HashMap<String,Object>());
}
else {
//rval=MVEL.executeExpression(compiledExpression, vars,(VariableResolverFactory)null);
rval=MVEL.executeExpression(compiledExpression, vars);
//rval = MVEL.eval(expression, vars);
}
return rval;
}
catch(Exception e) {
throw new Exception("MVEL FAILED:"+expression,e);
}
}
}
File2:ExecThread3.java
public class ExecThread3 implements Runnable{
Map dataMap=null;
public Map getDataMap() {
return dataMap;
}
public void setDataMap(Map dataMap) {
this.dataMap = dataMap;
}
#Override
public void run() {
Map varsMap = new HashMap();
Map dataMap=new HashMap();
dataMap.put("count",100);
varsMap.put("dataMap", dataMap);
String expression="System.out.println(\"[BEFORE Thread Id=\"+Thread.currentThread().getId()+\"] \"+dataMap.get(\"count\"));"+
"Thread.sleep(3000);"+
"System.err.println(\"[AFTER Thread Id=\"+Thread.currentThread().getId()+\"] \"+dataMap.get(\"count\"));";
try {
//MVEL.compileExpression(expression);
MVELHelper.compileAndExecute(expression, varsMap);
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
for(int k=0;k<10;k++){
ExecThread3 execThread=new ExecThread3();
new Thread(execThread).start();
}
}
}