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Posted to java-user@axis.apache.org by Alex Borschenko <aa...@gmail.com> on 2018/08/30 20:46:40 UTC
Axis2 / Java: java.lang.NullPointerException at
org.apache.axis2.context.MessageContext.isFault(MessageContext.java:4304)
Hi All!
I have deployed archive of services which consume/produce XMLs and now
I'm trying to add one more service who will consume/produce JSON.
It is simple service which operates with POJOs.
To enable JSON operations I added to axis2.xml:
<messageFormatter contentType="application/json"
class="org.apache.axis2.json.gson.JsonFormatter" />
<messageBuilder contentType="application/json"
class="org.apache.axis2.json.gson.JsonBuilder" />
In services XML I have declared my service:
<service name="LoginWSManager">
<Description>
This is a sample service to test json implementation
</Description>
<messageReceivers>
<messageReceiver mep="http://www.w3.org/ns/wsdl/in-out"
class="org.apache.axis2.json.gson.rpc.JsonRpcMessageReceiver" />
<messageReceiver mep="http://www.w3.org/ns/wsdl/in-only"
class="org.apache.axis2.json.gson.rpc.JsonInOnlyRPCMessageReceiver"/>
</messageReceivers>
<parameter name="ServiceClass"
locked="false">security.LoginWSManager</parameter>
</service>
Service code:
public LoginResponseWSBean login(String email, String password)throws Exception {
Application.logger().info("Logging in user email: " + email);
final LoginResponseWSBean loginResponseWSBean =new LoginResponseWSBean();
try {
loginBusinessLogic.login(email, password);
}catch (Exception e) {
loginResponseWSBean.setLoggedIn(false);
loginResponseWSBean.setMessage(e.getMessage());
loginResponseWSBean.setStackTrace(ExceptionUtils.getStackTrace(e));
Application.logger().warning(String.format("Returning: %s", loginResponseWSBean));
return loginResponseWSBean;
}
loginResponseWSBean.setLoggedIn(true);
loginResponseWSBean.setMessage(email +" logged in successfully!");
return loginResponseWSBean;
}
public class LoginResponseWSBeanimplements Serializable {
private boolean loggedIn =false;
private Stringmessage ="";
private StringstackTrace ="";
public LoginResponseWSBean(boolean loggedIn, String message, String stackTrace) {
this.loggedIn = loggedIn;
this.message = message;
this.stackTrace = stackTrace;
}
public LoginResponseWSBean() {
}
....
}
When I call it by this command:
curl -X POST -H "Content-Type: application/json" -d
"{'login':[{'email':'email@domain.com'}, {'password':'secret'}]}"
http://localhost:8080/axis2/services/LoginWSManager/login
It responds with this message:
{"Fault":{"faultcode":"soapenv:Server","faultstring":"java.lang.NullPointerException","detail":""}}
In tomcat logs I can see this stacktrace:
30-Aug-2018 23:38:09.137 INFO [http-nio-8080-exec-9]
org.apache.catalina.core.StandardWrapperValve.invoke [ERROR]
java.lang.NullPointerException
at
org.apache.axis2.context.MessageContext.isFault(MessageContext.java:4304)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.sendUsingOutputStream(CommonsHTTPTransportSender.java:289)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:244)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:431)
at
org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:43)
at
org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:106)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:169)
at
org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:178)
at
org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:163)
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:292)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
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:141)
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:528)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$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)
Please help me find out why it is not processing LoginResponseWSBean
response object as expected and generates NPE.
Thanx!
Alex
Re: Axis2 / Java: java.lang.NullPointerException at
org.apache.axis2.context.MessageContext.isFault(MessageContext.java:4304)
Posted by Alex Borschenko <aa...@gmail.com>.
On 8/31/2018 12:04 AM, robertlazarski wrote:
>
>
> On Thu, Aug 30, 2018 at 2:46 PM Alex Borschenko
> <aaborschenko@gmail.com <ma...@gmail.com>> wrote:
>
> Hi All!
>
> I have deployed archive of services which consume/produce XMLs and
> now I'm trying to add one more service who will consume/produce JSON.
> It is simple service which operates with POJOs.
>
> To enable JSON operations I added to axis2.xml:
>
> <messageFormatter contentType="application/json"
> class="org.apache.axis2.json.gson.JsonFormatter" />
>
> <messageBuilder contentType="application/json"
> class="org.apache.axis2.json.gson.JsonBuilder" />
>
> In services XML I have declared my service:
>
> <service name="LoginWSManager">
> <Description>
> This is a sample service to test json implementation
> </Description>
> <messageReceivers>
> <messageReceiver mep="http://www.w3.org/ns/wsdl/in-out"
> <http://www.w3.org/ns/wsdl/in-out>
> class="org.apache.axis2.json.gson.rpc.JsonRpcMessageReceiver" />
> <messageReceiver mep="http://www.w3.org/ns/wsdl/in-only"
> <http://www.w3.org/ns/wsdl/in-only>
> class="org.apache.axis2.json.gson.rpc.JsonInOnlyRPCMessageReceiver"/>
> </messageReceivers>
> <parameter name="ServiceClass"
> locked="false">security.LoginWSManager</parameter>
> </service>
>
> Service code:
>
> public LoginResponseWSBean login(String email, String password)throws Exception {
> Application.logger().info("Logging in user email: " + email);
>
> final LoginResponseWSBean loginResponseWSBean =new LoginResponseWSBean();
> try {
> loginBusinessLogic.login(email, password);
> }catch (Exception e) {
> loginResponseWSBean.setLoggedIn(false);
> loginResponseWSBean.setMessage(e.getMessage());
> loginResponseWSBean.setStackTrace(ExceptionUtils.getStackTrace(e));
> Application.logger().warning(String.format("Returning: %s", loginResponseWSBean));
> return loginResponseWSBean;
> }
> loginResponseWSBean.setLoggedIn(true);
> loginResponseWSBean.setMessage(email +" logged in successfully!");
>
> return loginResponseWSBean;
> }
>
> public class LoginResponseWSBeanimplements Serializable {
>
> private boolean loggedIn =false;
> private Stringmessage ="";
> private StringstackTrace ="";
>
> public LoginResponseWSBean(boolean loggedIn, String message, String stackTrace) {
> this.loggedIn = loggedIn;
> this.message = message;
> this.stackTrace = stackTrace;
> }
>
> public LoginResponseWSBean() {
>
> }
> ....
> }
>
>
> When I call it by this command:
>
> curl -X POST -H "Content-Type: application/json" -d
> "{'login':[{'email':'email@domain.com'}, {'password':'secret'}]}"
> <mailto:%7B%27login%27:[%7B%27email%27:%27email@domain.com%27%7D,%7B%27password%27:%27secret%27%7D]%7D>
> http://localhost:8080/axis2/services/LoginWSManager/login
>
> It responds with this message:
> {"Fault":{"faultcode":"soapenv:Server","faultstring":"java.lang.NullPointerException","detail":""}}
>
> In tomcat logs I can see this stacktrace:
>
> 30-Aug-2018 23:38:09.137 INFO [http-nio-8080-exec-9]
> org.apache.catalina.core.StandardWrapperValve.invoke [ERROR]
> java.lang.NullPointerException
> at
> org.apache.axis2.context.MessageContext.isFault(MessageContext.java:4304)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.sendUsingOutputStream(CommonsHTTPTransportSender.java:289)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:244)
> at
> org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:431)
> at
> org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:43)
> at
> org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:106)
> at
> org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:169)
> at
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:178)
> at
> org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:163)
> 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:292)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
> at
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
> 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:141)
> 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:528)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
> 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)
>
> Please help me find out why it is not processing
> LoginResponseWSBean response object as expected and generates NPE.
> Thanx!
>
> Alex
>
>
> I am planning on a patch for this issue as I am using GSON / Axis2
> quite a bit in my day job right now. There are a few things I want to
> discuss with the Axis2 dev team here, including this NPE.
>
> In this case I made this change in the MessageContext.java source. You
> would have to compile from source to fix it in the short term. I don't
> know why the Envelope is null here. Making this change had no effect
> on my existing soap based services but it did fix the GSON services.
>
> public boolean isFault() {
> if (getEnvelope() == null) {
> log.warn(getLogIDString() + ": ****WARNING**** " +
> myClassName +
> " , found null envelope, returning false");
> return false;
> }
> return getEnvelope().hasFault();
> }
>
> I was wondering if anyone is using GSON with axis2, the docs are
> something I plan on improving soon and good to know someone else is
> using this code.
>
> Regards,
> Robert
Hi Robert!
Your solution helped :)
I was already about to try this on my own and your suggestion made me
stronger in my decision :)
Thanx, mate!
Alex.
Re: Axis2 / Java: java.lang.NullPointerException at org.apache.axis2.context.MessageContext.isFault(MessageContext.java:4304)
Posted by robertlazarski <ro...@gmail.com>.
On Thu, Aug 30, 2018 at 2:46 PM Alex Borschenko <aa...@gmail.com>
wrote:
> Hi All!
> I have deployed archive of services which consume/produce XMLs and now I'm
> trying to add one more service who will consume/produce JSON.
> It is simple service which operates with POJOs.
>
> To enable JSON operations I added to axis2.xml:
>
> <messageFormatter contentType="application/json"
> class="org.apache.axis2.json.gson.JsonFormatter"
> />
>
> <messageBuilder contentType="application/json"
> class="org.apache.axis2.json.gson.JsonBuilder" />
>
> In services XML I have declared my service:
>
> <service name="LoginWSManager">
> <Description>
> This is a sample service to test json implementation
> </Description>
> <messageReceivers>
> <messageReceiver mep="http://www.w3.org/ns/wsdl/in-out"
> <http://www.w3.org/ns/wsdl/in-out>
> class="org.apache.axis2.json.gson.rpc.JsonRpcMessageReceiver" />
> <messageReceiver mep="http://www.w3.org/ns/wsdl/in-only"
> <http://www.w3.org/ns/wsdl/in-only>
>
> class="org.apache.axis2.json.gson.rpc.JsonInOnlyRPCMessageReceiver"/>
> </messageReceivers>
> <parameter name="ServiceClass"
> locked="false">security.LoginWSManager</parameter>
> </service>
>
> Service code:
>
> public LoginResponseWSBean login(String email, String password) throws Exception {
> Application.logger().info("Logging in user email: " + email);
>
> final LoginResponseWSBean loginResponseWSBean = new LoginResponseWSBean();
> try {
> loginBusinessLogic.login(email, password);
> } catch (Exception e) {
> loginResponseWSBean.setLoggedIn(false);
> loginResponseWSBean.setMessage(e.getMessage());
> loginResponseWSBean.setStackTrace(ExceptionUtils.getStackTrace(e));
> Application.logger().warning(String.format("Returning: %s", loginResponseWSBean));
> return loginResponseWSBean;
> }
> loginResponseWSBean.setLoggedIn(true);
> loginResponseWSBean.setMessage(email + " logged in successfully!");
>
> return loginResponseWSBean;
> }
> public class LoginResponseWSBean implements Serializable {
>
> private boolean loggedIn = false;
> private String message = "";
> private String stackTrace = "";
>
> public LoginResponseWSBean(boolean loggedIn, String message, String stackTrace) {
> this.loggedIn = loggedIn;
> this.message = message;
> this.stackTrace = stackTrace;
> }
>
> public LoginResponseWSBean() {
>
> }
> ....
> }
>
>
> When I call it by this command:
>
> curl -X POST -H "Content-Type: application/json" -d "{'login':[{'email':'email@domain.com'},
> {'password':'secret'}]}"
> <%7B%27login%27:[%7B%27email%27:%27email@domain.com%27%7D,%7B%27password%27:%27secret%27%7D]%7D>
> http://localhost:8080/axis2/services/LoginWSManager/login
>
> It responds with this message:
>
> {"Fault":{"faultcode":"soapenv:Server","faultstring":"java.lang.NullPointerException","detail":""}}
>
> In tomcat logs I can see this stacktrace:
>
> 30-Aug-2018 23:38:09.137 INFO [http-nio-8080-exec-9]
> org.apache.catalina.core.StandardWrapperValve.invoke [ERROR]
> java.lang.NullPointerException
> at
> org.apache.axis2.context.MessageContext.isFault(MessageContext.java:4304)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.sendUsingOutputStream(CommonsHTTPTransportSender.java:289)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:244)
> at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:431)
> at
> org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:43)
> at
> org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:106)
> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:169)
> at
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:178)
> at
> org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:163)
> 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:292)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
> at
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
> 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:141)
> 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:528)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$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)
>
> Please help me find out why it is not processing LoginResponseWSBean response
> object as expected and generates NPE.
> Thanx!
>
> Alex
>
I am planning on a patch for this issue as I am using GSON / Axis2 quite a
bit in my day job right now. There are a few things I want to discuss with
the Axis2 dev team here, including this NPE.
In this case I made this change in the MessageContext.java source. You
would have to compile from source to fix it in the short term. I don't know
why the Envelope is null here. Making this change had no effect on my
existing soap based services but it did fix the GSON services.
public boolean isFault() {
if (getEnvelope() == null) {
log.warn(getLogIDString() + ": ****WARNING**** " + myClassName +
" , found null envelope, returning false");
return false;
}
return getEnvelope().hasFault();
}
I was wondering if anyone is using GSON with axis2, the docs are something
I plan on improving soon and good to know someone else is using this code.
Regards,
Robert