I want to develop restful web service in java for google app engine. the tools i am using are
Eclipse Kepler Service Release 2 (Build id: 20140224-0627)
Google AppEngine Java SDK 1.9.2
i have used many versions of Jersey, e.g. 1.8, 1.5 etc. if i run the project on local server it works fine but when i deploy it on the google app engine i can able to open the welcome web page but can't able to access web service.
as mentioned in https://code.google.com/p/googleappengine/wiki/WillItPlayInJava link, GAE support Jersey 1.5 but when i import those jars files in my project i can't able to deploy it on GAE.
i don't know which version of Jersey should i use with Google AppEngine Java SDK 1.9.2 or should i use another version of SDK.
my web.xml file
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name>com.cit.cittracker</display-name>
<servlet>
<servlet-name>Sample Web Service</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com.cit.cittracker</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.config.feature.DisableWADL</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Sample Web Service</servlet-name>
<url-pattern>/restservices/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
my webservice class
package com.aakib.sample;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.PathParam;
@Path("/hello")
public class SampleHello {
/*This method is called if TEXT_PLAIN is requested*/
@GET
@Produces(MediaType.TEXT_PLAIN)
public String sayPlainTextHello() {
return "Hello Jersey" + "(In Text Format)";
}
/*This method is called if XML is requested*/
@GET
@Produces(MediaType.TEXT_XML)
public String sayXMLHello() {
return "<?xml version=\"1.0\"?>" + "<hello>Hello Jersey</hello>"
+ "<format>XML</format>";
}
/*This method is called if HTML is requested*/
@GET
@Produces(MediaType.TEXT_HTML)
public String sayHtmlHello() {
return "<html> " + "<title>" + "Hello Jersey" + "</title>"
+ "<body><h1>" + "Hello Jersey" + "</h1><h2>In HTML Format<h2></body>" + "</html> ";
}
/*This method is called if HTML is requested and have two parameters*/
@GET
@Path("{name}")
@Produces(MediaType.TEXT_HTML)
public String sayHtmlHelloWith1Param(@PathParam("name") String vName) {
return "<html> " + "<title>" + "Hello Jersey" + "</title>"
+ "<body><h1>Hello " + vName + "</h1><h2>In HTML Format</h2>" +
"<h3>1 Value Passed</h3>" + "</body>" + "</html> ";
}
/*This method is called if HTML is requested and have two parameters*/
@GET
@Path("{name}/{surname}")
@Produces(MediaType.TEXT_HTML)
public String sayHtmlHelloWith2Param(@PathParam("name") String vName, @PathParam("surname") String vSurname) {
return "<html> " + "<title>" + "Hello Jersey" + "</title>"
+ "<body><h1>Hello " + vName + " " + vSurname + "</h1><h2>In HTML Format</h2>" +
"<h3>2 Value Passed</h3>" + "</body>" + "</html> ";
}
}
when i tried with Jersey 2.5 & Jersey 1.17 i got the error on local server as
Apr 12, 2014 2:10:45 AM java.util.prefs.WindowsPreferences <init>
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
Apr 12, 2014 2:10:47 AM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed B:\Programming\Java EE\CIT Tracker Web Service\war\WEB-INF/appengine-web.xml
Apr 12, 2014 2:10:47 AM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
INFO: Successfully processed B:\Programming\Java EE\CIT Tracker Web Service\war\WEB-INF/web.xml
Apr 12, 2014 2:10:47 AM com.google.appengine.tools.development.SystemPropertiesManager setSystemProperties
INFO: Overwriting system property key 'java.util.logging.config.file', value 'C:\Program Files (x86)\Google AppEngine Java SDK 1.9.2\config\sdk\logging.properties' with value 'WEB-INF/logging.properties' from 'B:\Programming\Java EE\CIT Tracker Web Service\war\WEB-INF\appengine-web.xml'
Apr 12, 2014 2:10:47 AM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
Apr 12, 2014 2:10:47 AM com.google.apphosting.utils.jetty.JettyLogger info
INFO: jetty-6.1.x
Apr 12, 2014 2:10:48 AM com.sun.jersey.api.core.PackagesResourceConfig init
INFO: Scanning for root resource and provider classes in the packages:
com.cit.cittracker
Apr 12, 2014 2:10:48 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed CIT Tracker WebService: java.lang.IncompatibleClassChangeError: Implementing class
Apr 12, 2014 2:10:48 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed com.google.appengine.tools.development.DevAppEngineWebAppContext@7adb5354{/,B:\Programming\Java EE\CIT Tracker Web Service\war}: java.lang.IncompatibleClassChangeError: Implementing class
Apr 12, 2014 2:10:48 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed JettyContainerService$ApiProxyHandler@4c73cedb: java.lang.IncompatibleClassChangeError: Implementing class
Apr 12, 2014 2:10:48 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: Error starting handlers
java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:216)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:79)
at com.sun.jersey.api.core.PackagesResourceConfig.init(PackagesResourceConfig.java:104)
at com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:78)
at com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:89)
at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:696)
at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:674)
at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:203)
at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:374)
at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:557)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:254)
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:305)
at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26)
at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:79)
at com.google.appengine.tools.development.Modules.startup(Modules.java:97)
at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:255)
at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:47)
at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:213)
at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:211)
at java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:211)
at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:277)
at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:219)
at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:210)
Apr 12, 2014 2:10:48 AM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Started SelectChannelConnector@127.0.0.1:8888
Apr 12, 2014 2:10:48 AM com.google.appengine.tools.development.AbstractModule startup
INFO: Module instance default is running at http://localhost:8888/
Apr 12, 2014 2:10:48 AM com.google.appengine.tools.development.AbstractModule startup
INFO: The admin console is running at http://localhost:8888/_ah/admin
Apr 12, 2014 2:10:48 AM com.google.appengine.tools.development.DevAppServerImpl doStart
INFO: Dev App Server is now running
and when i try to open in browser it says
HTTP ERROR: 404
Problem accessing /. Reason:
NOT_FOUND
Powered by Jetty://
![Prime Path[POJ3126] [SPFA/BFS]](https://oscimg.oschina.net/oscnet/e1200f32e838bf1d387d671dc8e6894c37d.jpg "Prime Path[POJ3126] [SPFA/BFS]")
