I have written following code in my application:
public static final String DRIVER = "org.apache.derby.jdbc.EmbeddedDriver";
public static final String JDBC_URL = "jdbc:derby:c:/coopcashier/db/COOP;create=true";
try {
Class.forName(DRIVER);
Connection conn = DriverManager.getConnection(JDBC_URL);
Statement statement = conn.createStatement();
ResultSet resultset = statement.executeQuery("select * from USERS");
while(resultset.next()) {
if(resultset.getString(4).toString().equals(txtUsername) && resultset.getString(5).toString().equals(txtPassword)) {
homePage home = new homePage();
setVisible(false);
home.setVisible(true);
}
else {
JOptionPane.showMessageDialog(null,"Invalid Username or Password.","Invalid Credentials",JOptionPane.ERROR_MESSAGE);
}
}
if(conn != null) conn.close();
if(statement != null) statement.close();
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (SQLException e2) {
e2.printStackTrace();
}
When I am running this in Eclipse, everything goes well. But when I made the jar file of my project with same code and try to run, it always throw following exception:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "location" is null
I could not find solution. Please share if anybody resolved this problem.
TIA
I have jdbs template for sql for sql statements, and use hikari connection pool, after after several calls
i took exception, i used try-with-resources, where is my mistake?(Servlet Container -Tomcat)
public class SimpleJdbcTemplate {
private Connection connection;
private DataSource dataSource;
private ResultSet resultSet;
PreparedStatement preparedStatement;
public SimpleJdbcTemplate(Connection connection) {
this.connection = connection;
}
//private DataSourse datasource - из hikariconnectionpool
public SimpleJdbcTemplate(DataSource dataSource) {
this.dataSource = dataSource;
}
public <T> List<T> query(String sql, RowMapper<T> rowMapper, Object... args) {
try (PreparedStatement preparedStatement = dataSource.getConnection().prepareStatement(sql)){
resultSet = null;
List<T> result = new ArrayList<>();
int position = 1;
for (Object arg : args) {
preparedStatement.setObject(position, arg);
position++;
}
if (sql.contains("UPDATE") || sql.contains("update") ||sql.toLowerCase().contains("delete")||sql.toLowerCase().contains("insert")) {
preparedStatement.executeUpdate();
} else{
resultSet = preparedStatement.executeQuery();
if (resultSet == null) {
throw new SQLException("No resultsSet");
}
while (resultSet.next()) {
result.add(rowMapper.mapRow(resultSet));
}
}
log.info(result.toString());
return result;
} catch (SQLException e) {
throw new IllegalStateException(e);
Logs:
24-Oct-2020 13:46:16.633 SEVERE [http-nio-8080-exec-3] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlets.view.MessendjerViewServlet] in context with path [/LabWork_war] threw exception
java.lang.IllegalStateException: java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 30014ms.
at repository.utill.SimpleJdbcTemplate.query(SimpleJdbcTemplate.java:52)
at repository.jdbc.UserRepositoryImpl.findUserByUUID(UserRepositoryImpl.java:84)
at service.UserService.findUser(UserService.java:71)
at servlets.filter.AuthFilter.doFilter(AuthFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 30014ms.
at com.zaxxer.hikari.pool.HikariPool.createTimeoutException(HikariPool.java:695)
at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:197)
at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:162)
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:100)
at repository.utill.SimpleJdbcTemplate.query(SimpleJdbcTemplate.java:27)
... 22 more
Okey i founded mistake this line is dont work correctly(try-with-resources)
(reparedStatement preparedStatement = dataSource.getConnection().prepareStatement(sql))
i think when i try to close connection it tooks a random connection from datasource(dataSource.getConnection()),so,my connection was always open, i reformated code to this
public class SimpleJdbcTemplate {
DataSource dataSource;
//private DataSourse datasource - из hikariconnectionpool
public SimpleJdbcTemplate(DataSource dataSource) {
this.dataSource = dataSource;
}
public <T> List<T> query(String sql, RowMapper<T> rowMapper, Object... args) { //TODO repair connection leak
Connection connection = null;
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
try {
connection = dataSource.getConnection();
preparedStatement = connection.prepareStatement(sql);
resultSet = null;
List<T> result = new ArrayList<>();
int position = 1;
for (Object arg : args) {
preparedStatement.setObject(position, arg);
position++;
}
if (sql.contains("UPDATE") || sql.contains("update") || sql.toLowerCase().contains("delete") || sql.toLowerCase().contains("insert")) {
preparedStatement.executeUpdate();
} else {
resultSet = preparedStatement.executeQuery();
if (resultSet == null) {
throw new SQLException("No resultsSet");
}
while (resultSet.next()) {
result.add(rowMapper.mapRow(resultSet));
}
}
log.info(result.toString());
return result;
} catch (SQLException e) {
throw new IllegalStateException(e);
} finally {
try {
if (resultSet != null) {
resultSet.close();
log.info("resultes finaly closed? - {}", resultSet.isClosed());
}
} catch (SQLException throwables) {
throwables.printStackTrace();
}
if (preparedStatement != null) {
try {
preparedStatement.close();
preparedStatement.close();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
try {
if (connection != null) {
connection.close();
connection.close();
}
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
}
}
all worked as it should
I am learning to use the JMockit to test my Restful API.The missing invocation error is abusing me.
The Restful API:
#RestController
public class AgentInfoRest {
#Autowired
AgentInfoRepository agentInfoRepository;
private Logger logger = LoggerFactory.getLogger(AgentInfoRest.class);
#RequestMapping("/allagentInfo")
RestResponse getAllAgentInfo()
{
RestResponse restResponse = new RestResponse();
logger.info("getAllAgentInfo has no request parameter");
Collection<AgentInfo> result = agentInfoRepository.getAllAgents();
if(result.isEmpty())
{
restResponse.setRetCode(-1);
restResponse.setRetMsg("Request success,no such record in db");
}
restResponse.setResult(result);
return restResponse;
}
}
The Test Class:
public class AgentInfoRestTest {
String host = "http://127.0.0.1:8080";
#Test
public void getAllAgentInfoTest(#Mocked final AgentInfoRepository agentInfoRepository) {
RestTemplate restTemplate = new RestTemplate();
RestResponse restResponse = new RestResponse();
AgentInfoRest agentInfoRest = new AgentInfoRest();
new StrictExpectations() {
{
agentInfoRepository.getAllAgents(); result = null; times = 1;
}
};
String url = "/allagentInfo";
ResponseEntity<RestResponse> result = restTemplate.getForEntity(host + url, RestResponse.class);
new FullVerifications() {
{
}
};
}
}
The Error:
mockit.internal.MissingInvocation: Missing invocation of:
com.egoo.dao.repository.freelink.AgentInfoRepository#getAllAgents()
on mock instance: com.egoo.dao.repository.freelink.$Impl_AgentInfoRepository#50a7bc6e
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:253)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: Missing invocation
at com.egoo.dao.rest.freelink.AgentInfoRestTest$1.(AgentInfoRestTest.java:33)
at com.egoo.dao.rest.freelink.AgentInfoRestTest.getAllAgentInfoTest(AgentInfoRestTest.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.lang.reflect.Method.invoke(Method.java:498)
... 7 more
Good day Pals,
I am new to Springboot and having problems testing my PDF uploader spring controller endpoint.
The rest endpoint works when tested via postman, but not in my unit test.
I am using a spring boot application with the following key components and problem is:
org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile parameter 'file' is not present
at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:251)
2016-06-09 19:03:03,359 4198 [main] DEBUG o.s.t.c.w.ServletTestExecutionListener - Resetting RequestContextHolder for test context [DefaultTestContext#646be2c3 testClass = PDFUploadControllerTest, testInstance = x.y.z.rest.controller.PDFUploadControllerTest#2b44d6d0, testMethod = testHandleFileUpload#PDFUploadControllerTest, testException = java.lang.AssertionError: Status expected:<200> but was:<400>, mergedContextConfiguration = [WebMergedContextConfiguration#797badd3 testClass = PDFUploadControllerTest, locations = '{}', classes = '{class x.y.z.rest.PresentationConfiguration, class x.y.z.rest.controller.MockDomainConfiguration}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.SpringApplicationContextLoader', parent = [null]]].
java.lang.AssertionError: Status
Expected :200
Actual :400
Please, see some code and stacktrace below ... I have been banging my head on the wall all day, debugging using all online references but NO luck ....
Your help will be most appreciated. Thanks
Application
#EnableAutoConfiguration()
public class Application {
public static void main(String[] args) {
SpringApplication.run(
new Object[]{
DomainConfiguration.class,
PresentationConfiguration.class
},
args);
}
}
DomainConfiguration
#Configuration
#EnableAutoConfiguration()
#ComponentScan(basePackages = {
"x.y.z.rest.domain",
"x.y.z.rest.service",
"x.y.z.rest.util",
"x.y.z.rest.repository"
})
public class DomainConfiguration {
#Autowired(required = true)
public void configeJackson(ObjectMapper jackson2ObjectMapper) {
jackson2ObjectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
}
}
PresentationConfiguration
#Configuration
#ComponentScan(basePackages = {"x.y.z.rest.controller"})
public class PresentationConfiguration {
}
## RestController
#RestController
public class PDFUploadController {
#Autowired
public void setUploadService(UploadService uploadService) {
this.uploadService = uploadService;
}
private UploadService uploadService;
#RequestMapping(value="/upload", method=RequestMethod.POST)
#ResponseStatus(HttpStatus.CREATED)
public #ResponseBody String handleFileUpload(
#RequestParam("file") MultipartFile file,#RequestParam String a,#RequestParam String b,#RequestParam String c, #RequestParam String d,#RequestParam String e) throws Exception{
java.io.InputStream inputStream =null;
if (!file.isEmpty() && checkContentType(file.getContentType())) {
try {
DBObject dbObject = new BasicDBObject();
//populate DBObject
inputStream = file.getInputStream();
uploadService.uploadFile(inputStream,file.getOriginalFilename(),file.getContentType(),dbObject);
return "success";
} catch (Exception e) {
return "You failed to upload " + file.getOriginalFilename() + " => " + e.getMessage();
}
finally {
if(inputStream!=null) {
inputStream.close();
}
}
} else {
return "You failed to upload " + file.getOriginalFilename() + " as it is an invalid file.";
}
}
}
##### Unit Test Class for Controller
#RunWith(SpringJUnit4ClassRunner.class)
#SpringApplicationConfiguration(classes = {
PresentationConfiguration.class,
MockDomainConfiguration.class})
#WebAppConfiguration
public class PDFUploadControllerTest {
#Autowired
private WebApplicationContext webApplicationContext;
#Autowired
private UploadService uploadService;
private MockMvc mockMvc;
#Autowired
private ObjectMapper mapper;
private RestDocumentationResultHandler document;
#Before
public void setUp() {
mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
.build();
}
#After
public void resetMocks() {
reset(uploadService);
}
#Test
public void testHandleFileUpload() throws Exception {
FileInputStream fileInputStream = null;
MockMultipartFile mockMultipartFile = null;
try {
File file = new File("//Users//olatom//Desktop//testFile4Upload.pdf");
// create FileInputStream object
fileInputStream = new FileInputStream(file);
System.out.println("# File input stream for PDF : " + fileInputStream);
byte fileContent[] = new byte[(int) file.length()];
// Reads up to certain bytes of data from this input stream into an array of bytes.
fileInputStream.read(fileContent);
//create string from byte array
String pdfContent = new String(fileContent);
//mockMultipartFile = new MockMultipartFile("upload", file.getName(), "multipart/form-data", fileInputStream);
mockMultipartFile = new MockMultipartFile("file", fileInputStream);
HashMap<String, String> contentTypeParams = new HashMap<String, String>();
contentTypeParams.put("boundary", "265001916915724");
MediaType mediaType = new MediaType("multipart", "form-data", contentTypeParams);
//mockMvc.perform(fileUpload("/upload")
// .file(mockMultipartFile)
// .param("a", "1234").param("b", "PX1234").param("c", "100").param("d", "120")
// .contentType(MediaType.MULTIPART_FORM_DATA))
// .andExpect(status().isOk());
// mockMvc.perform(fileUpload("/upload")).andExpect(status().isOk());
//mockMvc.perform(fileUpload("/upload").file(mockMultipartFile)).andExpect(status().isOk());
mockMvc.perform(
fileUpload("/upload")
.content(mockMultipartFile.getBytes())
.param("a", "1234").param("b", "PX1234").param("c", "100").param("d", "120")
.contentType(mediaType)
)
.andExpect(status().isOk());
} catch (FileNotFoundException e) {
System.out.println("File not found" + e);
} catch (IOException ioe) {
System.out.println("IO Exception while reading file " + ioe);
} catch (Exception exc) {
} finally {
// close the streams using close method
try {
if (fileInputStream != null) {
fileInputStream.close();
}
} catch (IOException ioe) {
System.out.println("Error while closing stream: " + ioe);
}
}
}
}
####### MockDomainConfiguration #####
/**
* Create Mockito mocks for the service classes.
* For this to work the #EnableAutoConfiguration annotation below also has to exclude JPA Autoconfiguration.
*/
#Configuration
#EnableAutoConfiguration()
public class MockDomainConfiguration {
#Bean
public UploadService mockUploadService() {
return mock(UploadService.class);
}
}
## MY ERROR
When I run the junit test in Intellij I get the following error:
2016-06-09 19:03:03,331 4170 [main] DEBUG o.s.t.w.s.TestDispatcherServlet - DispatcherServlet with name '' processing POST request for [/upload]
2016-06-09 19:03:03,342 4181 [main] DEBUG o.s.b.a.e.m.EndpointHandlerMapping - Looking up handler method for path /upload
2016-06-09 19:03:03,343 4182 [main] DEBUG o.s.b.a.e.m.EndpointHandlerMapping - Did not find handler method for [/upload]
2016-06-09 19:03:03,343 4182 [main] DEBUG o.s.w.s.m.m.a.RequestMappingHandlerMapping - Looking up handler method for path /upload
2016-06-09 19:03:03,344 4183 [main] DEBUG o.s.w.s.m.m.a.RequestMappingHandlerMapping - Returning handler method [public java.lang.String x.y.z.rest.controller.PDFUploadController.handleFileUpload(org.springframework.web.multipart.MultipartFile,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) throws java.lang.Exception]
2016-06-09 19:03:03,344 4183 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'PDFUploadController'
2016-06-09 19:03:03,352 4191 [main] DEBUG o.s.w.s.m.m.a.ServletInvocableHandlerMethod - Error resolving argument [0] [type=org.springframework.web.multipart.MultipartFile]
HandlerMethod details:
Controller [x.y.z.rest.controller.PDFUploadController]
Method [public java.lang.String x.y.z.rest.controller.PDFUploadController.handleFileUpload(org.springframework.web.multipart.MultipartFile,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) throws java.lang.Exception]
org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile parameter 'file' is not present
at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:251)
at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:96)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:99)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:161)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:870)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844)
at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167)
at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:155)
at x.y.z.rest.controller.PDFUploadControllerTest.testHandleFileUpload(PDFUploadControllerTest.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
2016-06-09 19:03:03,353 4192 [main] DEBUG o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver - Resolving exception from handler [public java.lang.String x.y.z.rest.controller.PDFUploadController.handleFileUpload(org.springframework.web.multipart.MultipartFile,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) throws java.lang.Exception]: org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile parameter 'file' is not present
2016-06-09 19:03:03,354 4193 [main] DEBUG o.s.w.s.m.a.ResponseStatusExceptionResolver - Resolving exception from handler [public java.lang.String x.y.z.rest.controller.PDFUploadController.handleFileUpload(org.springframework.web.multipart.MultipartFile,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) throws java.lang.Exception]: org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile parameter 'file' is not present
2016-06-09 19:03:03,354 4193 [main] DEBUG o.s.w.s.m.s.DefaultHandlerExceptionResolver - Resolving exception from handler [public java.lang.String x.y.z.rest.controller.PDFUploadController.handleFileUpload(org.springframework.web.multipart.MultipartFile,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) throws java.lang.Exception]: org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile parameter 'file' is not present
2016-06-09 19:03:03,355 4194 [main] DEBUG o.s.t.w.s.TestDispatcherServlet - Null ModelAndView returned to DispatcherServlet with name '': assuming HandlerAdapter completed request handling
2016-06-09 19:03:03,355 4194 [main] DEBUG o.s.t.w.s.TestDispatcherServlet - Successfully completed request
2016-06-09 19:03:03,359 4198 [main] DEBUG o.s.t.c.s.AbstractDirtiesContextTestExecutionListener - After test method: context [DefaultTestContext#646be2c3 testClass = PDFUploadControllerTest, testInstance = x.y.z.rest.controller.PDFUploadControllerTest#2b44d6d0, testMethod = testHandleFileUpload#PDFUploadControllerTest, testException = java.lang.AssertionError: Status expected:<200> but was:<400>, mergedContextConfiguration = [WebMergedContextConfiguration#797badd3 testClass = PDFUploadControllerTest, locations = '{}', classes = '{class x.y.z.rest.PresentationConfiguration, class x.y.z.rest.controller.MockDomainConfiguration}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.SpringApplicationContextLoader', parent = [null]]], class annotated with #DirtiesContext [false] with mode [null], method annotated with #DirtiesContext [false] with mode [null].
2016-06-09 19:03:03,359 4198 [main] DEBUG o.s.t.c.w.ServletTestExecutionListener - Resetting RequestContextHolder for test context [DefaultTestContext#646be2c3 testClass = PDFUploadControllerTest, testInstance = x.y.z.rest.controller.PDFUploadControllerTest#2b44d6d0, testMethod = testHandleFileUpload#PDFUploadControllerTest, testException = java.lang.AssertionError: Status expected:<200> but was:<400>, mergedContextConfiguration = [WebMergedContextConfiguration#797badd3 testClass = PDFUploadControllerTest, locations = '{}', classes = '{class x.y.z.rest.PresentationConfiguration, class x.y.z.rest.controller.MockDomainConfiguration}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.SpringApplicationContextLoader', parent = [null]]].
java.lang.AssertionError: Status
Expected :200
Actual :400
<Click to see difference>
at org.springframework.test.util.AssertionErrors.fail(AssertionErrors.java:60)
at org.springframework.test.util.AssertionErrors.assertEquals(AssertionErrors.java:89)
at org.springframework.test.web.servlet.result.StatusResultMatchers$10.match(StatusResultMatchers.java:655)
at org.springframework.test.web.servlet.MockMvc$1.andExpect(MockMvc.java:171)
at x.y.z.rest.controller.PDFloadControllerTest.testHandleFileUpload(PDFUploadControllerTest.java:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Your help will be most appreciated.
When running the maven build with Junit getting "No Persistence provider for EntityManager named" error.Not able to identify what is missing in my code.
Main class:
public class ApprovalHistory {
#PersistenceContext(unitName = "Approval_History")
private Logger logger = LoggerFactory.getLogger(ApprovalHistory.class);
public EntityManagerFactory emfactory = null;
final String JDBC_URL_H2DB = "jdbc:h2:file:./APApproval/ApprovalHistoryH2DB";
final String JDBC_USERNAME_H2DB = "";
final String JDBC_PASSWORD_H2DB = "";
final String JDBC_DRIVER_SQL = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
final String JDBC_DRIVER_H2 = "org.h2.Driver";
final String JDBC_DRIVER_HSQL = "org.hsqldb.jdbc.JDBCDriver";
final String PERSISTANCE_UNIT_NAME = "Approval_History";
final String SELECT_BO_TABLE = "SELECT bobj FROM BusinessObjectTable bobj where bobj.docId =:";
final String SELECT_COMMENT_TABLE = "SELECT comment FROM CommentTable comment where comment.actionTable.id IN :";
final String SELECT_REASON_TABLE = "SELECT reason FROM ReasonTable reason where reason.actionTable.id IN :";
public ApprovalHistory()
{
try {
createEntityManagerFactory();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void insertData(List<ApprovalHistoryModel> historyList){
if(historyList != null && !historyList.isEmpty())
{
EntityManager entitymanager = null;
try
{
entitymanager = getEntityManager();
entitymanager.getTransaction().begin();
ApprovalHistoryModel firstItem = historyList.get(0);
ActionTable a = new ActionTable(firstItem.actionType, firstItem.tenantId, firstItem.comment, firstItem.reason);
for(ApprovalHistoryModel h : historyList)
{
a.getBusinessObjects().add(new BusinessObjectTable(h.userName, h.taskId, h.docId, h.objectIdentifier1, h.objectIdentifier2, h.objectIdentifier3,h.tenantId));
}
entitymanager.persist(a);
entitymanager.getTransaction().commit();
}
catch (RuntimeException e) {
if(entitymanager!=null && entitymanager.getTransaction().isActive()) {
entitymanager.getTransaction().rollback();
}
throw e;
}
finally{
closeEntityManager(entitymanager);
}
}
}
public List<ApprovalHistoryModel> getApprovalHistory(String docID) throws Exception
{
logger.info("=ApprovalConnector=: start of getApprovalHistory()");
List<ApprovalHistoryModel> historyModels = new ArrayList<ApprovalHistoryModel>();
if(docID!=null && !docID.isEmpty()) {
EntityManager entitymanager = null;
try
{
entitymanager = getEntityManager();
TypedQuery<BusinessObjectTable> bobjquery = entitymanager.createQuery(SELECT_BO_TABLE+"DocID ",BusinessObjectTable.class);
bobjquery.setParameter("DocID", docID);
List<BusinessObjectTable> bobjs = bobjquery.getResultList();
if(bobjs!=null){
for (BusinessObjectTable bobj : bobjs) {
ActionTable a = bobj.getActionTable();
ApprovalHistoryModel history = new ApprovalHistoryModel();
history.docId = bobj.getDocId();
history.taskId = bobj.getApprovalItemId();
history.userName = bobj.getUserName();
logger.debug("=ApprovalConnector=: getApprovalHistory(): documentID - "+bobj.getDocId());
history.actionType = a.getActionType();
logger.debug("=ApprovalConnector=: getApprovalHistory(): actionType - "+ history.actionType);
history.actionDate = ISODateTimeFormat.dateTime().print(new DateTime(a.getActionDate()));
history.objectIdentifier1 = bobj.getObjectIdentifier1();
history.objectIdentifier2=bobj.getObjectIdentifier2();
history.objectIdentifier3 = bobj.getObjectIdentifier3();
history.tenantId = a.getTenantId();
history.comment = a.getComment()!=null?a.getComment().getComment():"";
history.reason = a.getReason()!=null?a.getReason().getReason():"";
historyModels.add(history);
}
}
logger.info("=ApprovalConnector=: end of getApprovalHistory()");
}
finally{
closeEntityManager(entitymanager);
}
}
return historyModels;
}
public void createEntityManagerFactory() throws Exception
{
Map<String, String> persistenceMap = new HashMap<String, String>();
String jdbcDriver = getJdbcDriverName(JDBC_URL_H2DB);
persistenceMap.put("javax.persistence.jdbc.driver", jdbcDriver);
persistenceMap.put("javax.persistence.jdbc.url", JDBC_URL_H2DB);
if (!JDBC_USERNAME_H2DB.isEmpty()) {
persistenceMap.put("javax.persistence.jdbc.user", JDBC_USERNAME_H2DB);
}
if (!JDBC_PASSWORD_H2DB.isEmpty()) {
persistenceMap.put("javax.persistence.jdbc.password", JDBC_PASSWORD_H2DB);
}
persistenceMap.put("eclipselink.session-name",System.currentTimeMillis() + "");
this.emfactory = Persistence.createEntityManagerFactory(PERSISTANCE_UNIT_NAME, persistenceMap);
}
public EntityManager getEntityManager()
{
EntityManager entitymanager = this.emfactory.createEntityManager();
return entitymanager;
}
public void closeEntityManager(EntityManager entitymanager)
{
if(entitymanager!=null)
entitymanager.close();
}
public void closeEntityManagerFactory()
{
if(this.emfactory!=null)
this.emfactory.close();
}
private String getJdbcDriverName(String jdbcUrl) {
if (jdbcUrl.startsWith("jdbc:sqlserver"))
return JDBC_DRIVER_SQL;
if (jdbcUrl.startsWith("jdbc:h2"))
return JDBC_DRIVER_H2;
if (jdbcUrl.startsWith("jdbc:hsqldb"))
return JDBC_DRIVER_HSQL;
return null;
}
Test Calss:
public class ApprovalHistoryTest {
ApprovalHistory approvalHistory = new ApprovalHistory();
#Before
public void setUp() throws Exception {
List<ApprovalHistoryModel> actionHistoryModels = new ArrayList<ApprovalHistoryModel>();
for(int i=0;i<=2;i++){
ApprovalHistoryModel history = new ApprovalHistoryModel();
String comment = "comment no. " + i;
String reason = "reason no. " + i;
String userName = "User" + i;
history.taskId = "321YZ61_0026CV7Z0000XB" + i;
history.actionDate = ISODateTimeFormat.dateTime().print(new DateTime(new Date()));
history.actionType = i;
history.comment = comment.trim();
history.docId = "321YZ61_026CV7Z0000TD" + i;
history.userName = userName;
history.reason = reason;
actionHistoryModels.add(history);
}
approvalHistory.insertData(actionHistoryModels);
}
#After
public void tearDown() throws Exception {
DeleteApprovalHistory history = new DeleteApprovalHistory();
try{
history.purgeRecord(0,"DAYS");
approvalHistory.closeEntityManagerFactory();
}catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Test()
public void test() {
//ApprovalHistory approvalHistory = new ApprovalHistory();
List<ApprovalHistoryModel> historyList = new ArrayList<ApprovalHistoryModel>();
for(int i=0;i<=2;i++){
ApprovalHistoryModel history = new ApprovalHistoryModel();
try {
Thread.sleep(1000);
historyList=approvalHistory.getApprovalHistory(history.docId);
assertEquals("321YZ61_0026CV7Z0000XB" + i,historyList.get(i).taskId);`enter code here`
assertEquals("comment no. " + i,historyList.get(i).comment);
assertEquals("User" + i,historyList.get(i).userName);
assertEquals("reason no. " + i,historyList.get(i).reason);
assertEquals(i,historyList.get(i).actionType);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
Persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="Approval_History" transaction-type="RESOURCE_LOCAL">
<class>com.perceptivesoftware.apapproval.history.ActionTable</class>
<class>com.perceptivesoftware.apapproval.history.BusinessObjectTable</class>
<class>com.perceptivesoftware.apapproval.history.CommentTable</class>
<class>com.perceptivesoftware.apapproval.history.ReasonTable</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<properties>
<property name="eclipselink.ddl-generation" value="create-or-extend-tables" />
<property name="eclipselink.logging.level.sql" value="FINE"/>
<property name="eclipselink.logging.parameters" value="true"/>
<property name="eclipselink.multitenant.tenants-share-cache" value="true" />
</properties>
</persistence-unit>
</persistence>
Error::
Running ApprovalHistoryTest javax.persistence.PersistenceException: No
Persistence provider for EntityManager named Approval_History at
javax.persistence.Persistence.createEntityManagerFactory(Unknown
Source) at
com.perceptivesoftware.apapproval.history.ApprovalHistory.createEntityManagerFactory(ApprovalHistory.java:167)
at
com.perceptivesoftware.apapproval.history.ApprovalHistory.(ApprovalHistory.java:48)
at ApprovalHistoryTest.(ApprovalHistoryTest.java:20) at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at
org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:187)
at
org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:236)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:233)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at
org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at
org.junit.runners.ParentRunner.run(ParentRunner.java:300) at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497) at
org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at
org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at
org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
javax.persistence.PersistenceException: No Persistence provider for
EntityManager named Approval_History at
javax.persistence.Persistence.createEntityManagerFactory(Unknown
Source) at
com.perceptivesoftware.apapproval.history.ApprovalHistory.createEntityManagerFactory(ApprovalHistory.java:167)
at
com.perceptivesoftware.apapproval.history.ApprovalHistory.(ApprovalHistory.java:48)
at
com.perceptivesoftware.apapproval.history.DeleteApprovalHistory.purgeRecord(DeleteApprovalHistory.java:46)
at ApprovalHistoryTest.tearDown(ApprovalHistoryTest.java:50) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497) at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:36)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at
org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at
org.junit.runners.ParentRunner.run(ParentRunner.java:300) at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497) at
org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at
org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at
org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
You've annotated the wrong attribute:
#PersistenceContext(unitName = "Approval_History")
private Logger logger = LoggerFactory.getLogger(ApprovalHistory.class);
Should be:
#PersistenceContext(unitName = "Approval_History")
public EntityManager em;
The #PersistenceContext annotation injects an EntityManager into your code, which is created from the EntityManagerFactory associated with the persistence unit that you specify ("Approval_History" in your case).