#SpringBootApplication
public class SpringDataSolarApplication {
public static void main(String[] args) {
SpringApplication.run(SpringDataSolarApplication.class, args);
}
#Bean
SolrTemplate solrTemplate() {
return new SolrTemplate(solrClientFactory());
}
#Bean
SolrClientFactory solrClientFactory() {
Credentials credentials = new UsernamePasswordCredentials("solr", "SolrRocks");
return new HttpSolrClientFactory(solrClient(), credentials , "BASIC");
}
#Bean
SolrClient solrClient() {
return new HttpSolrClient.Builder("http://localhost:8983/solr").build();
}
}
public interface EmployeeRepository extends SolrCrudRepository{
Employee findByName(String name);
}
#RestController
public class EmployeeController {
#Autowired
private EmployeeRepository repository;
#PostConstruct
public void addEmployees() {
List<Employee> employees = new ArrayList<>();
employees.add(new Employee("373", "Basant", new String[] { "Bangalore", "BTM" }));
employees.add(new Employee("908", "Santosh", new String[] { "Hyderbad", "XYZ" }));
employees.add(new Employee("321", "Sagar", new String[] { "Pune", "PQR" }));
repository.saveAll(employees);
}
#GetMapping("/getALL")
public Iterable<Employee> getEmployees() {
return repository.findAll();
}
#GetMapping("/getEmployee/{name}")
public Employee getEmployeeByName(#PathVariable String name) {
return repository.findByName(name);
}
}
the getALL operation is working fine but the save operation failed with this error. Please help
Caused by: org.apache.http.client.NonRepeatableRequestException: Cannot retry request with a non-repeatable request entity.
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:225) ~[httpclient-4.5.7.jar:4.5.7]
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185) ~[httpclient-4.5.7.jar:4.5.7]
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.7.jar:4.5.7]
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.7.jar:4.5.7]
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.7.jar:4.5.7]
... 63 common frames omitted
Came across same issue and solved with extending HttpSolrClient and applying same backend approach with recommended way mentioned on Solr docs but getting credentials from constructor not setting on each request.
class CustomSolrClient extends HttpSolrClient {
#Nullable
private final String username;
#Nullable
private final String password;
CustomSolrClient(Builder builder, String username, String password) {
super(builder);
this.username = username;
this.password = password;
}
#Override
public NamedList<Object> request(SolrRequest request, ResponseParser processor, String collection) throws SolrServerException, IOException {
HttpRequestBase method = createMethod(request, collection);
if (username != null && password != null) {
String userPass = username + ":" + password;
String encoded = Base64.byteArrayToBase64(userPass.getBytes(UTF_8));
method.setHeader(new BasicHeader("Authorization", "Basic " + encoded));
}
return executeMethod(method, processor, request instanceof V2Request || request.getPath().contains("/____v2"));
}
}
And create bean using that:
#Bean
public SolrClient solrClient() {
return new CustomSolrClient(new HttpSolrClient.Builder(properties.getHost()), properties.getUsername(), properties.getPassword());
}
This may seem as an ugly approach but if you check HttpSolrClientFactory sources it's even more uglier which actually accesses private field of HttpClient belongs to Solr client.
Related
I'm trying to receive and process messages through GCP Pub/Sub.
I tried to convert and receive the payload part of the message through JacksonPubSubMessageConverter, but it failed.
It seems that I am not handling byte[] properly inside JacksonPubSubMessageConverter. Do I need to change ObjectMapper settings or override JacksonPubSubMessageConverter?
Below is a code example.
#Slf4j
#Configuration
public class PubSubConfig {
#Bean
public PubSubMessageConverter pubSubMessageConverter(ObjectMapper objectMapper) {
return new JacksonPubSubMessageConverter(objectMapper);
}
}
// ...
#Getter
#Setter
#ToString
#NoArgsConstructor(access = AccessLevel.PROTECTED)
public class MessageDTO {
private PubSubAction action;
#JsonFormat(pattern = "yyyy-MM-dd")
private LocalDate startedAt;
private Boolean dryRun;
}
// ...
public enum PubSubAction {
MY_ACTION("my action"),
ETC("etc action");
private final String description;
PubSubAction(String description) {
this.description = description;
}
#JsonCreator
public static PubSubAction create(String name) {
return Stream.of(PubSubAction.values())
.filter(pubSubAction -> pubSubAction.name().equals(name))
.findAny()
.orElse(null);
}
}
// ...
class MyConsumer() {
private final String subscriptionName;
private final PubSubTemplate pubSubTemplate;
public MyConsumer(
String subscriptionName,
PubSubTemplate pubSubTemplate
) {
this.subscriptionName = subscriptionName;
this.pubSubTemplate = pubSubTemplate;
}
private void consume(
ConvertedBasicAcknowledgeablePubsubMessage<MessageDTO> convertedMessage) {
try {
MessageDTO payload = convertedMessage.getPayload();
log.debug("payload {}", payload);
// payload MessageDTO(action=MY_ACTION, startedAt=null, dryRun=null)
convertedMessage.ack();
} catch (Exception e) {
log.error("Unknown Exception {} {}", e.getMessage(), this.subscriptionName, e);
}
}
private Consumer<ConvertedBasicAcknowledgeablePubsubMessage<MessageDTO>> convertConsumer() {
return this::consume;
}
public void subscribe() {
log.info("Subscribing to {}", subscriptionName);
pubSubTemplate.subscribeAndConvert(subscriptionName, this.convertConsumer(),
MessageDTO.class);
}
}
I'm implementing JWT and Spring Security for authentication in my application.
I have 3 roles: Admin, Moderator and User.
For example, after logging with user role, I got the home page, but once I go to hit the user space by clicking on a button, I got:
2020-09-04 09:01:22.819 ERROR 10148 --- [nio-8080-exec-5]
c.b.s.security.jwt.AuthEntryPointJwt : Unauthorized error: Full
authentication is required to access this resource
the file webSecurityConfig.java is:
#Configuration
#EnableWebSecurity
#EnableGlobalMethodSecurity(
// securedEnabled = true,
// jsr250Enabled = true,
prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
#Autowired
UserDetailsServiceImpl userDetailsService;
#Autowired
private AuthEntryPointJwt unauthorizedHandler;
#Bean
public AuthTokenFilter authenticationJwtTokenFilter() {
return new AuthTokenFilter();
}
#Override
public void configure(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
authenticationManagerBuilder.userDetailsService(userDetailsService).passwordEncoder(passwordEncoder());
}
#Bean
#Override
public AuthenticationManager authenticationManagerBean() throws Exception {
return super.authenticationManagerBean();
}
#Bean
public PasswordEncoder passwordEncoder() {
return new BCryptPasswordEncoder();
}
#Override
protected void configure(HttpSecurity http) throws Exception {
http.cors().and().csrf().disable()
.exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
.authorizeRequests().antMatchers("/api/auth/**").permitAll()
.antMatchers("/api/test/**").permitAll()
.anyRequest().authenticated();
http.addFilterBefore(authenticationJwtTokenFilter(), UsernamePasswordAuthenticationFilter.class);
}
}
The class AuthEntryPointJwt is:
#Component
public class AuthEntryPointJwt implements AuthenticationEntryPoint {
private static final Logger logger = LoggerFactory.getLogger(AuthEntryPointJwt.class);
#Override
public void commence(HttpServletRequest request, HttpServletResponse response,
AuthenticationException authException) throws IOException, ServletException {
logger.error("Unauthorized error: {}", authException.getMessage());
response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Error: Unauthorized");
}
}
The class AuthTokenFilter is:
public class AuthTokenFilter extends OncePerRequestFilter {
#Autowired
private JwtUtils jwtUtils;
#Autowired
private UserDetailsServiceImpl userDetailsService;
private static final Logger logger = LoggerFactory.getLogger(AuthTokenFilter.class);
#Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
try {
String jwt = parseJwt(request);
if (jwt != null && jwtUtils.validateJwtToken(jwt)) {
String username = jwtUtils.getUserNameFromJwtToken(jwt);
UserDetails userDetails = userDetailsService.loadUserByUsername(username);
UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(
userDetails, null, userDetails.getAuthorities());
authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
SecurityContextHolder.getContext().setAuthentication(authentication);
}
} catch (Exception e) {
logger.error("Cannot set user authentication: {}", e);
}
filterChain.doFilter(request, response);
}
private String parseJwt(HttpServletRequest request) {
String headerAuth = request.getHeader("Authorization");
if (StringUtils.hasText(headerAuth) && headerAuth.startsWith("Bearer ")) {
return headerAuth.substring(7, headerAuth.length());
}
return null;
}
}
The class JwtUtils is:
#Component
public class JwtUtils {
private static final Logger logger = LoggerFactory.getLogger(JwtUtils.class);
#Value("${bezkoder.app.jwtSecret}")
private String jwtSecret;
#Value("${bezkoder.app.jwtExpirationMs}")
private int jwtExpirationMs;
public String generateJwtToken(Authentication authentication) {
UserDetailsImpl userPrincipal = (UserDetailsImpl) authentication.getPrincipal();
return Jwts.builder()
.setSubject((userPrincipal.getUsername()))
.setIssuedAt(new Date())
.setExpiration(new Date((new Date()).getTime() + jwtExpirationMs))
.signWith(SignatureAlgorithm.HS512, jwtSecret)
.compact();
}
public String getUserNameFromJwtToken(String token) {
return Jwts.parser().setSigningKey(jwtSecret).parseClaimsJws(token).getBody().getSubject();
}
public boolean validateJwtToken(String authToken) {
try {
Jwts.parser().setSigningKey(jwtSecret).parseClaimsJws(authToken);
return true;
} catch (SignatureException e) {
logger.error("Invalid JWT signature: {}", e.getMessage());
} catch (MalformedJwtException e) {
logger.error("Invalid JWT token: {}", e.getMessage());
} catch (ExpiredJwtException e) {
logger.error("JWT token is expired: {}", e.getMessage());
} catch (UnsupportedJwtException e) {
logger.error("JWT token is unsupported: {}", e.getMessage());
} catch (IllegalArgumentException e) {
logger.error("JWT claims string is empty: {}", e.getMessage());
}
return false;
}
}
The class AuthController is:
#CrossOrigin(origins = "*", maxAge = 3600)
#RestController
#RequestMapping("/api/auth")
public class AuthController {
#Autowired
AuthenticationManager authenticationManager;
#Autowired
UserRepository userRepository;
#Autowired
RoleRepository roleRepository;
#Autowired
PasswordEncoder encoder;
#Autowired
JwtUtils jwtUtils;
#PostMapping("/signin")
public ResponseEntity<?> authenticateUser(#Valid #RequestBody LoginRequest loginRequest) {
System.out.println("---------------- auth 1 ");
Authentication authentication = authenticationManager.authenticate(
new UsernamePasswordAuthenticationToken(loginRequest.getUsername(), loginRequest.getPassword()));
SecurityContextHolder.getContext().setAuthentication(authentication);
String jwt = jwtUtils.generateJwtToken(authentication);
UserDetailsImpl userDetails = (UserDetailsImpl) authentication.getPrincipal();
List<String> roles = userDetails.getAuthorities().stream()
.map(item -> item.getAuthority())
.collect(Collectors.toList());
return ResponseEntity.ok(new JwtResponse(jwt,
userDetails.getId(),
userDetails.getUsername(),
userDetails.getEmail(),
roles));
}
#GetMapping("/user")
#PreAuthorize("hasRole('USER') or hasRole('MODERATOR') or hasRole('ADMIN')")
public String userAccess()
{
System.out.println("---------------- test User ");
return "User Content.";
}
}
The file application.properties, I put:
spring.datasource.url=...
spring.datasource.username=...
spring.datasource.password=...
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation= true
spring.jpa.properties.hibernate.dialect=...
spring.jpa.hibernate.ddl-auto=update
bezkoder.app.jwtSecret= bezKoderSecretKey
bezkoder.app.jwtExpirationMs= 86400000
In Browser console, I got that exception.
Could you please help me solving that issue ?. Big thanks.
You have to update WebSecurityConfig according to your Controller mapping.
.antMatchers("/**").permitAll()
.anyRequest().authenticated();
You probably are testing in wrong in postman or amneasia or whatever API testing tool you are using. If you are using postman :
1.Select the Header tab
2.Click the button that says "hide auto-generated headers"
3.Type "Authorization" (without quotes) under the "Key" column.
4.Type "Bearer" under the "Value" column then paste the token. Ensure there is a space between "Bearer" and the "Token".
5.Send the request
You should comment #PreAuthorize("hasRole('USER') or hasRole('MODERATOR') or hasRole('ADMIN')").
Tell about the result ?.
I have added Hibernate filters on my entities . These filters are applied on queries which fetch Collection of entity but not applied on queries which fetch single entity. Below is my code.
AOrganization.java
#MappedSuperclass
#FilterDef(name = "OrgFilter", parameters = { #ParamDef(name = "allowedOrgIdList", type = "long") })
#Filter(name = "OrgFilter", condition = "org_id in (:allowedOrgIdList)")
public class AOrganization implements Serializable {
#ManyToOne()
#JoinColumn(name = "org_id", nullable = true)
private Organization organization;
public Organization getOrganization() {
return organization;
}
public void setOrganization(Organization organization) {
this.organization = organization;
}
}
Site.java
#Data
#Entity
#Table(name = "site")
public class Site extends AOrganization{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
private long id;
#Column(name = "site_name")
private String siteName;
#Override
public String toString() {
return "Site [id=" + id + ", siteName=" + siteName + "]";
}
}
SiteService.java
public interface SiteService {
public List<Site> getAllSites();
public List<Site> getSiteBySiteName(String siteName);
public Site updateSiteName(Long id, String siteName);
}
SiteRepository.java
#Repository
public interface SiteRepository extends AOrganizationRepository<Site, Long> {
public List<Site> findBySiteName(String siteName);
public List<Site> findByOrganization_Id(Long orgId);
}
AOrganizationRepository.java
#NoRepositoryBean
public interface AOrganizationRepository<T, ID extends java.io.Serializable> extends CrudRepository<T, ID> {
}
SiteServiceImpl.java
#Service
public class SiteServiceImpl implements SiteService {
#Autowired
private EntityManager entityManager;
#Autowired
private SiteRepository siteRepository;
#Override
public List<Site> getAllSites() {
Iterable<Site> sites = siteRepository.findAll();
List<Site> allSites = new ArrayList<>();
sites.forEach(allSites::add);
return allSites;
}
#Override
public List<Site> getSiteBySiteName(String siteName) {
List<Site> allSites = siteRepository.findBySiteName(siteName);
return allSites;
}
#Override
public Site updateSiteName(Long id,String siteName) {
Site site = siteRepository.findById(id).get();
if(site == null)
return null;
site.setSiteName(siteName);
siteRepository.save(site);
return site;
}
}
AOrganizationAspect.java
#Aspect
#Component
#Slf4j
public class AOrganizationAspect {
#PersistenceContext
private EntityManager entityManager;
#Pointcut("execution(public * com.harshal.springboot.springfilter.repository.AOrganizationRepository+.*(..))")
protected void aOrganizationRepositoryRepositoryMethod() {
log.info("aOrganizationRepositoryRepositoryMethod");
}
#Around(value = "aOrganizationRepositoryRepositoryMethod()")
public Object enableOwnerFilter(ProceedingJoinPoint joinPoint) throws Throwable {
// Variable holding the session
Session session = null;
try {
// Get the Session from the entityManager in current persistence context
session = entityManager.unwrap(Session.class);
// Enable the filter
Filter filter = session.enableFilter("OrgFilter");
// Set the parameter from the session
List<Long> orgList = getAllowedOrgIdList();
filter.setParameterList("allowedOrgIdList", orgList);
} catch (Exception ex) {
// Log the error
log.error("Error enabling OrgFilter : Reason -" + ex.getMessage());
}
// Proceed with the joint point
Object obj = joinPoint.proceed();
// If session was available
if (session != null) {
// Disable the filter
session.disableFilter("OrgFilter");
}
// Return
return obj;
}
private List<Long> getAllowedOrgIdList() {
return Arrays.asList(2l);
}
}
So , hibernate filters are applied if method getSiteBySiteName is called and filters are not applied if findById method is called.
Below are queries :
For getSiteBySiteName :
select site0_.id as id1_2_, site0_.org_id as org_id3_2_,
site0_.site_name as site_nam2_2_ from site site0_ where site0_.org_id
in (?) and site0_.site_name=?
Please help . Thanks in advance.
For findById
select site0_.id as id1_2_0_, site0_.org_id as org_id3_2_0_,
site0_.site_name as site_nam2_2_0_, organizati1_.id as id1_1_1_,
organizati1_.address as address2_1_1_, organizati1_.org_name as
org_name3_1_1_ from site site0_ left outer join organization
organizati1_ on site0_.org_id=organizati1_.id where site0_.id=?
findById is using the EntityManager.find method and do not create a query.
Plus Hibernate Filters only work on queries.
You should write a query instead of using findById
I had been developing and testing on the Codename One simulator and everything worked fine.
However, when I tested it on a real Android device, I get a 405 Method Not Allowed error. This happened on both a POST and GET request.
I suspect it is the #Consume and #Produces which are causing the problem. How do I fix this?
Here are my server side code:
#GET
#Path("/all/{language}")
#Produces("application/json")
public final Response getAllCelebrities(#PathParam("language") String language) {
String celebritiesJSONString = CelebrityActions.getAllCelebritiesNamesJSONString(language);
return Response.ok(celebritiesJSONString).build();
}
#POST
#Path("/login")
#Consumes("application/x-www-form-urlencoded")
#Produces("text/plain")
public final Response login(
#FormParam("loginid") String loginid,
#FormParam("password") String password
) {
System.out.println("login 0 started");
Long fanID;
try {
fanID = AccountsActions.login(loginid, password);
} catch (Exception e) {
return Response.serverError().entity(e.getMessage()).build();
}
if (fanID == null) {
return responseFanIDNotFoundError();
}
System.out.println("This is printed out!!!");
System.out.println("login 100 ended");
return Response.ok().build();
}
And here's my log upon execution of the login() method:
login 0 started
This is printed out!!!
login 100 ended
which means the server side method was ready to return a 200 response.
What is causing the Android client to show a 405 Method Not Allow error?
EDIT: I'm adding my cient-side code here:
(note that this one handles a cookie from a server)
public class Login extends PostConnection {
private final String LoginEndpoint = "account/login";
private String loginIDString;
private String loginPasswordString;
// Tested and works on simulator!
public Login(String loginIDString, String loginPasswordString) {
super();
endpoint = LoginEndpoint;
this.loginIDString = loginIDString;
this.loginPasswordString = loginPasswordString;
}
#Override
protected void prepareParametersMap() {
parametersMap = new HashMap<>();
parametersMap.put("loginid", loginIDString);
parametersMap.put("password", loginPasswordString);
}
}
public abstract class PostConnection extends PostPutConnection {
public PostConnection() {
super();
}
public boolean connect() throws IOException {
connectionRequest.setHttpMethod("POST");
return super.connect();
}
}
public abstract class PostPutConnection extends Connection {
protected HashMap<String, String> parametersMap;
public PostPutConnection() {
super();
}
protected static final void setPostParameters(ConnectionRequest connectionRequest, HashMap<String, String> parametersMap) {
Set<String> paramateterKeys = parametersMap.keySet();
Iterator<String> parameterKeysIterator = paramateterKeys.iterator();
while (parameterKeysIterator.hasNext()) {
String key = parameterKeysIterator.next();
String value = parametersMap.get(key);
connectionRequest.addArgument(key, value);
}
}
protected abstract void prepareParametersMap();
public boolean connect() throws IOException {
prepareParametersMap();
setPost();
setPostParameters();
return super.connect();
}
private void setPostParameters() {
setPostParameters(connectionRequest, parametersMap);
}
private final void setPost() {
connectionRequest.setPost(true);
}
}
public abstract class Connection {
private final static String protocol = "http";
private final static String domain = "192.168.0.109:20000";
protected ConnectionRequest connectionRequest;
protected String endpoint;
public Connection() {
super();
init();
}
protected void init() {
connectionRequest = new ConnectionRequest();
connectionRequest.setCookiesEnabled(true);
ConnectionRequest.setUseNativeCookieStore(true);
}
public boolean connect() throws IOException {
connectionRequest.setUrl(protocol + "://" + domain + "/" + endpoint);
NetworkManager.getInstance().addToQueueAndWait(connectionRequest);
int responseCode = getResponseCode();
return responseCode == 200 ? true : false;
}
private int getResponseCode() {
int responseCode = connectionRequest.getResponseCode();
return responseCode;
}
}
And another method below:
(note that this one does not handle cookies)
public class GetAllCelebrities extends GetConnection {
private final String GetCelebritiesEndpoint = "celebrity/all";
public GetAllCelebrities(String language) {
super();
endpoint = GetCelebritiesEndpoint + "/" + language;
}
}
public abstract class GetConnection extends Connection {
private Map<String, Object> responseData;
public GetConnection() {
super();
}
public boolean connect() throws IOException {
connectionRequest.setHttpMethod("GET");
boolean connectResult = super.connect();
if (!connectResult) {
return false;
}
responseData = getResponseResult();
return true;
}
private Map<String, Object> getResponseResult() throws IOException {
byte[] responseData = connectionRequest.getResponseData();
ByteArrayInputStream responseDataBAIS = new ByteArrayInputStream(responseData);
InputStreamReader responseDataISR = new InputStreamReader(responseDataBAIS, "UTF-8");
JSONParser responseDateJSONParser = new JSONParser();
Map<String, Object> responseResult = responseDateJSONParser.parseJSON(responseDataISR);
return responseResult;
}
public Map<String, Object> getResponseData() {
return responseData;
}
}
And it is called like:
private Map<String, Object> fetchCelebrities() throws IOException {
GetAllCelebrities getAllCelebrities = new GetAllCelebrities("en");
getAllCelebrities.connect();
return getAllCelebrities.getResponseData();
}
private boolean performLogin() throws IOException {
String loginIDString = loginID.getText();
String loginPasswordString = loginPassword.getText();
Login login = new Login(loginIDString, loginPasswordString);
boolean loginResult = login.connect();
return loginResult;
}
It's a bit hard to read all of this code but I'll venture a guess based on the server message. You've set the method to "PUT" along the way in the post put class and that isn't supported by the server yet.
The best way to debug these things is with the network monitor in the Simulator. Its shows the traffic and would have made these things mostly clear
I have just started with App Engine and I have tried to make a very simple app which adds Person objects with distinctive names to the datastore. This the object:
#PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Person {
#PrimaryKey
#Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;
#Persistent
#Unique
private String name;
public Person(String nameIn){
this.name = nameIn;
}
public Long getId(){
return this.id;
}
public void setId(Long idIn){
this.id = idIn;
}
}
This servlet is responsible for persisting objects on datastore. But prior to that, the method doesUserExist(String) checks whether object with the same 'name' field exists:
#SuppressWarnings("serial")
public class PersonDatastoreServlet extends HttpServlet {
private static final String PARAM_NAME = "name";
private PersistenceManager pmf = PMF.get().getPersistenceManager();
public void doGet(HttpServletRequest req, HttpServletResponse response)
throws IOException {
String name = req.getParameter(PARAM_NAME);
PrintWriter printWriter = response.getWriter();
try{
if(!doesUserExist(name)) {
Person p = new Person(name);
pmf.makePersistent(p);
response.setContentType("text/html");
printWriter.println("<h1>"+p.getId()+"</h1>");
}
else {
response.setContentType("text/html");
printWriter.println("<p>User already exists</p>");
}
}
catch(Exception e) {
throw new IOException();
}
finally{
pmf.close();
}
}
private boolean doesUserExist(String nameIn) {
Query q = pmf.newQuery(Person.class);
q.setFilter("name == lastNameParam");
q.declareParameters("String lastNameParam");
String name = nameIn;
try{
List<Person> list = (List<Person>) q.execute(name);
if (list.isEmpty()){
return false;
}
else return true;
}
finally{
q.closeAll();
}
}
}
The take seems very straightforward, but it just not working. I have a form which processing the request. When I run my app for the first time it does successfully create and persist an object, however whenever i want to add another object with a different name, I am getting the Error
Error: Server Error
The server encountered an error and could not complete your request.
If the problem persists, please report your problem and mention this error message and the query that caused it.
It indicates that the query causes the problem but I have idea what is wrong with my query. Can anybody help please?