I have some code for download file from web server.
Everything works alright, but in console I have this exception:
июн 26, 2015 2:08:42 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [default] in context with path [/TestTask] threw exception
java.lang.IllegalStateException: Cannot call sendError() after the response has been committed
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:462)
at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.handleErrorInDevMode(DefaultDispatcherErrorHandler.java:109)
at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.handleError(DefaultDispatcherErrorHandler.java:57)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:909)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:576)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Why and what it can be? And how i can fix this problem? I try find answer in the google, but I failed.
The code:
package actions;
import java.io.IOException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.Action;
import org.apache.log4j.Logger;
import org.apache.struts.chain.contexts.ServletActionContext;
import service.CsvCreator;
import com.opensymphony.xwork2.ActionSupport;
public class DownloadCsvAction extends ActionSupport {
private static final long serialVersionUID = -4714537109287679996L;
private CsvCreator CSVcreator;
private static final Logger logger = Logger.getLogger(DownloadCsvAction.class);
public CsvCreator getCSVcreator() {
return CSVcreator;
}
public void setCSVcreator(CsvCreator cSVcreator) {
CSVcreator = cSVcreator;
}
#Override
public String execute() {
HttpServletResponse response = org.apache.struts2.ServletActionContext.getResponse();
response.setHeader("Content-Disposition", "attachment; filename=\"phone_records.csv\"");
response.setContentType("text/csv");
ServletOutputStream out;
try {
out = response.getOutputStream();
String tableHeader = "Caller, Event, Reciever, Timestamp\n";
out.write(tableHeader.getBytes("UTF-8"));
out.write(CSVcreator.getAllRecordsInString().getBytes("UTF-8"));
out.flush();
out.close();
} catch (IOException e) {
logger.error(e.getMessage());
}
return SUCCESS;
}
}
And my struts.xml:
<action name="DownloadCsvAction" class="DownloadCsvAction">
<result name="success" type="dispatcher"/>
</action>
Why and what it can be?
Because response is already committed. You have closed response before it's used by the Struts2.
And how I can fix this problem?
When your action execution ends, return Action.NONE result code. This code tells the invoker to not execute any result because response might be already committed.
You can also rewrite the action implementation to use stream result type. In this way you have not to do with the response and let Struts2 do the rest. Example of using stream result is here.
Related
I have run into a problem that I have been trying to figure out for days:
I added my driver: mysql-connector-java-5.1.40.jar to build path.
web-inf lib folder, apache tomcat lib folder. And also I have it in web app libaries.
However when I just run a main class and run it works, it is something to do with the web app?
This is my code:
This is the servlet class, that I use to connect to my database
package sql;
import java.io.IOException;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class RegisterServlet
*/
#WebServlet("/register")
public class RegisterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private DbUtil sql = new DbUtil();
/**
* #see HttpServlet#HttpServlet()
*/
public RegisterServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String email = request.getParameter("email");
String username = request.getParameter("username");
String password = request.getParameter("password");
if (sql.addToAccountToDatabase(username, password, email)) {
System.out.println("Gongratz");
} else {
System.out.println("mhhh ?");
}
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
}
this is the second class how i make connection
package sql;
import java.sql.*;
public class DbUtil {
public Connection getConnection() {
Connection connect = null;
try {
String url = "jdbc:mysql://hidden:3306/hidden";
connect = DriverManager.getConnection(url, "hidden", "hidden");
return connect;
} catch (Exception e) {
System.out.println("Cannot connect to database");
e.printStackTrace();
}
return connect;
}
public boolean addToAccountToDatabase(String username, String password, String email) {
try {
String query = "INSERT INTO Account (username, password, email) VALUES (?, ?,?)";
PreparedStatement pStat = getConnection().prepareStatement(query);
pStat.setString(1, username);
pStat.setString(2, password);
pStat.setString(3, email);
pStat.executeUpdate();
return true;
} catch (Exception e) {
System.out.println("User already exists");
e.printStackTrace();
return false;
}
}
}
And I get this error:
Cannot connect to database
java.sql.SQLException: No suitable driver found for jdbc:mysql://192.185.227.214:3306/ratekas9_illegalminds
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at sql.DbUtil.getConnection(DbUtil.java:15)
at sql.DbUtil.addToAccountToDatabase(DbUtil.java:34)
at sql.RegisterServlet.doPost(RegisterServlet.java:40)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
User already exists
java.lang.NullPointerException
at sql.DbUtil.addToAccountToDatabase(DbUtil.java:34)
at sql.RegisterServlet.doPost(RegisterServlet.java:40)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
mhhh ?
Because the String "jdbc:mysql" doesn't declare the driver Class itself, but only the name registered by a potential driver. You have to force the JVM to load the Driver class with a :
Class.forName("com.mysql.jdbc.Driver").newInstance();
before starting the JDBC connection.
You need 3 steps to solve your problem:
Add this code before connection Class.forName("com.mysql.jdbc.Driver");
Add 'JConnector.jar' into your project and build path.
Don't try enter same person because there is error in stack trace "User all ready exist ".
Adding the JAR file into your CLASSPATH (for compilation needs) / project's BUILDPATH and also under your project's WEB-INF/lib folder (for runtime references, i.e., when you deploy your application to an application server). For further reference, please go through this link
Class.forName("com.mysql.jdbc.Driver");
This is no longer required as per Official Java documentation here, but it is a mandatory step if you are using prior versions of JDBC 4.0.
This question can provide you lot many details on this regards.
Hope all these details help you resolve your issue!
I am trying to call a rest controller using get call which reads files from file system and return InputStream of that file.
client side code:
website = new URL(configurationFileUrl + "/stream/" + key.getReportRawDataId());
URLConnection connection = website.openConnection();
connection.setConnectTimeout(60 * 1000);
connection.setReadTimeout(60 * 1000);
stream = connection.getInputStream();
The controller code:
#RestController
#RequestMapping(value = "/blueprintConfig", produces = {"application/octet-stream", "application/json"}, headers = "Accept=*/*")
public class ReportConfigurationController {
#ResponseBody
#RequestMapping(value = "/stream/{id:.+}", method = RequestMethod.GET)
public ResponseEntity<?> getFilesAsStream(#PathVariable("id") String id) throws Exception {
return configurationService.getFilesAsStream(id);
}
}
service:
#Override
public ResponseEntity<?> getFilesAsStream(String id) throws Exception {
String filePath = resourcePath + id;
InputStream is = null;
try {
is = new FileInputStream(filePath);
} catch (FileNotFoundException e) {
LOGGER.error("can not read file: {}", e);
}
return new ResponseEntity<InputStream>(is, HttpStatus.OK);
}
while debugging I see the service is returning inputstream without any exception, but client side is throwing below IO exception:
java.io.IOException: Server returned HTTP response code: 406 for URL: http://localhost:8091/blueprintConfig/stream/1_check.png
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1839)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1440)
at com.jasper.wrapper.service.ReportServiceImpl.putInCache(ReportServiceImpl.java:128)
at com.jasper.wrapper.service.ReportServiceImpl.populateCache(ReportServiceImpl.java:110)
at com.jasper.wrapper.service.ReportServiceImpl.lambda$generateReport$0(ReportServiceImpl.java:64)
at com.jasper.wrapper.service.ReportServiceImpl$$Lambda$8/819977316.accept(Unknown Source)
at java.util.LinkedHashMap.forEach(LinkedHashMap.java:676)
at com.jasper.wrapper.service.ReportServiceImpl.generateReport(ReportServiceImpl.java:64)
at com.jasper.wrapper.controller.JasperReportController.generateReport(JasperReportController.java:27)
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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
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:775)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
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:967)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
what is wrong I am doing here I tried setting
connection.setRequestProperty("accept", "application/octet-stream");
but no luck, could you please help
406 means your client isn't accepting the response it got from the server, so the server is unaware (ergo no error on the server).
It really depends on what the server is saying the data is.
Just telnet into your server:
telnet localhost:8091
and emit a:
GET /blueprintConfig/stream/1_check.png HTTP/1.1
(press return key twice)
Then look at the response headers to find out what your server is sending back to the client.
Alternatively, if you have curl installed, just do:
curl -I http://localhost:8091/blueprintConfig/stream/1_check.png
And look at the headers.
I have set the interceptor for the Rest Template code as below:
ClientHttpRequestInterceptor acceptHeaderPdf = getClientHttpRequestInterceptor(APPLICATION_STREAM);
<-- here APPLICTION_STREAM is my header externalized variable you can use your headers like application/pdf ... -->
restTemplate.setInterceptors(singletonList(acceptHeaderPdf));
private ClientHttpRequestInterceptor getClientHttpRequestInterceptor(String applicationJson) {
return new AcceptHeaderHttpRequestInterceptor(
applicationJson);
}
class AcceptHeaderHttpRequestInterceptor implements ClientHttpRequestInterceptor {
private final String headerValue;
public AcceptHeaderHttpRequestInterceptor(String headerValue) {
this.headerValue = headerValue;
}
#Override
public ClientHttpResponse intercept(HttpRequest request, byte[] body,
ClientHttpRequestExecution execution) throws IOException {
HttpRequestWrapper requestWrapper = new HttpRequestWrapper(request);
requestWrapper.getHeaders().setAccept(singletonList(MediaType.valueOf(headerValue)));
return execution.execute(requestWrapper, body);
}
}
I have a controller where I have controller level mapping as "/subjects/{subjectId}/lessons" which is required due to some reason
#RestController
#RequestMapping( value = "/subjects/{subjectId}/lessons",produces = { MediaType.APPLICATION_JSON_VALUE } )
public class LessonController {
.......
#RequestMapping( method = RequestMethod.GET )
public ResponseEntity<Resources<Resource<Lesson>>> getAllSjubject(#PathVariable(value = "subjectId") int subjectId){
List<Lesson> lessonList = lessonService.getAllLessons(subjectId);
Resources<Resource<Lesson>> resource = this.lessonResourceAssembler.toLessonResourceList(lessonList);
return new ResponseEntity<Resources<Resource<Lesson>>>(resource, HttpStatus.OK);
}
}
When made request it throws the exception
java.lang.IllegalArgumentException: Not enough variable values available to expand 'subjectId'
at org.springframework.web.util.UriComponents$VarArgsTemplateVariables.getValue(UriComponents.java:327)
at org.springframework.web.util.UriComponents.expandUriComponent(UriComponents.java:230)
at org.springframework.web.util.HierarchicalUriComponents$FullPathComponent.expand(HierarchicalUriComponents.java:685)
at org.springframework.web.util.HierarchicalUriComponents.expandInternal(HierarchicalUriComponents.java:328)
at org.springframework.web.util.HierarchicalUriComponents.expandInternal(HierarchicalUriComponents.java:47)
at org.springframework.web.util.UriComponents.expand(UriComponents.java:163)
at org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo(ControllerLinkBuilder.java:89)
at org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo(ControllerLinkBuilder.java:69)
at com.khaino.springrest.assembler.LessonResourceAssembler.toLessonResource(LessonResourceAssembler.java:31)
at com.khaino.springrest.assembler.LessonResourceAssembler.toLessonResourceList(LessonResourceAssembler.java:44)
at com.khaino.springrest.controller.LessonController.getAllSjubject(LessonController.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:111)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:806)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:729)
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:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
But when I move the pathvariable to method level as below it is working correctly.
#RequestMapping( value = "/subjects",produces = { MediaType.APPLICATION_JSON_VALUE } )
public class LessonController {
......
#RequestMapping( value = "/{subjectId}/lessons", method = RequestMethod.GET )
public ResponseEntity<Resources<Resource<Lesson>>> getAllSjubject(#PathVariable("subjectId") int subjectId){
List<Lesson> lessonList = lessonService.getAllLessons(subjectId);
Resources<Resource<Lesson>> resource = this.lessonResourceAssembler.toLessonResourceList(lessonList);
return new ResponseEntity<Resources<Resource<Lesson>>>(resource, HttpStatus.OK);
}
....
}
Something wrong with my code? What could be the reason and solution?
Your mappings works in both scenarios but based on your stack trace, the following part is the source of problem:
this.lessonResourceAssembler.toLessonResourceList(lessonList)
You're creating some Hypermedia Links that contains some Template Variables which are NOT expanded.
Updated: Use this approach to create link:
linkTo(methodOn(LessonController.class).getAllSjubject(42))
.withRel(REL_SELF)
mehtodOn is in org.springframework.hateoas.mvc.ControllerLinkBuilder package, make sure you have correct static imports.
http://localhost:8080/springexample/subjects/3/lessons worked for me with code:
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
#RestController
#RequestMapping(value = "/subjects/{subjectId}/lessons", produces = { MediaType.APPLICATION_JSON_VALUE })
public class LessonController {
#RequestMapping(method = RequestMethod.GET)
public ResponseEntity getAllSjubject(
#PathVariable(value = "subjectId") int subjectId) {
System.out.println(subjectId);
return new ResponseEntity(HttpStatus.OK);
}
}
Having, Spring Dependency defined in pom.xml as: <spring.version>4.1.4.RELEASE</spring.version>
I want to write a simple application using RMI. On the server side I have an interface foo and a class fooImpl.
My interface is:
import java.rmi.Remote;
public interface Foo extends Remote {
public String exec(String test) throws Exception;
}
My implementation of the the above interface is:
import java.rmi.server.UnicastRemoteObject;
public class FooImpl extends UnicastRemoteObject implements Foo {
public FooImpl() throws Exception {
java.rmi.registry.LocateRegistry.createRegistry(1099);
java.rmi.Naming.rebind("myFoo",this);
}
public String exec(String test) {
return "This is a Test";
}
public static void main(String[] args) {
try {
FooImpl fooImpl = new FooImpl();
} catch (Exception e) {
e.printStackTrace();
}
}
}
On the client side, I have web application using PrimeFace which is runnig on Tomcat. There is a IndexBean on client side:
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import java.net.MalformedURLException;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;
#ManagedBean
#RequestScoped
public class IndexBean {
public void execute() {
try {
Foo foo = (Foo) java.rmi.Naming.lookup("//localhost/myFoo");
System.out.println(foo.exec());
} catch (NotBoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (RemoteException e) {
e.printStackTrace();
}
}
}
when I execute the code, I get the following error at the client side:
java.rmi.UnmarshalException: error unmarshalling return; nested
exception is: java.lang.ClassNotFoundException: Foo (no security
manager: RMI class loader disabled) at
sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source) at
java.rmi.Naming.lookup(Naming.java:101) at
bean.IndexBean.execute(IndexBean.java:15) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606) at
org.apache.el.parser.AstValue.invoke(AstValue.java:245) at
org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:277)
at
org.apache.myfaces.view.facelets.el.ContextAwareTagMethodExpression.invoke(ContextAwareTagMethodExpression.java:96)
at
javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:88)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:51)
at
javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:409)
at javax.faces.component.UICommand.broadcast(UICommand.java:103) at
javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:1013)
at
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:284)
at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1302)
at
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:745)
at
org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:38)
at
org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170)
at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
at
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:744) Caused by:
java.lang.ClassNotFoundException: Foo (no security manager: RMI class
loader disabled) at
sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:553)
at
java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:646)
at
java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311)
at
sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:255)
at
java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1558)
at
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
... 44 more
Also, I changed the port which Tomcat uses to do not have conflict with RMI port.
The client doesn't have the remote interface on its CLASSPATH, or, probably, the stub either. To avoid using a stub, add
super(0);
as the first line of the constructor.
NB you must store the result of createRegistry() in a static variable, to prevent the Registry from exiting.
I was trying to use the code of this question and everytime I make a request to the application I get this error:
HTTP Status 500 - Servlet.init() for servlet api.tienda.venta.ApplicationConfig threw exception
Stack trace:
javax.servlet.ServletException: Servlet.init() for servlet api.tienda.venta.ApplicationConfig threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1556)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1513)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
This is the code that I'm using:
//ApplicationConfig.java
#ApplicationPath("venta")
public class ApplicationConfig extends Application {
#Override
public Set<Class<?>> getClasses() {
Set<Class<?>> resources = new java.util.HashSet<>();
addRestResourceClasses(resources);
return resources;
}
private void addRestResourceClasses(Set<Class<?>> resources) {
resources.add(JacksonFeature.class);
resources.add(RequestFilter.class);
resources.add(api.tienda.venta.ventaResource.class);
}
}
// RequestFilter.java
public class RequestFilter implements ContainerRequestFilter{
#Context
private HttpServletRequest request;
#Override
public void filter(ContainerRequestContext requestContext) {
String remoteAddr = request.getRemoteAddr();
System.out.print("Remote Address: " + remoteAddr);
}
}
If I remove the #Context annotation the error is gone and everything works normally, any clue about what is happening here?