Develop Reference

Why does the glassfish server only load a bean after it has been restarted?

When the rtu.smallview.xhtml action event is triggered it requests info from the java bean, from the database select and hands it back to the xhtml.
The xhtml was not displaying the data from the database, so I added breakpoints in the java bean to figure out what was going wrong, but when the program loaded it never hit the breakpoint in the bean.
The server output is saying this when the program is loaded:
Info: WELD-000119: Not generating any bean definitions from Beans.RTU.RTU_SmallView_Bean because of underlying class loading error: Type pojo.rtu.RTU_unit not found. If this is unexpected, enable DEBUG logging to see the full error.
So I stopped the server, clean and built the project again, and when it runs for the first time it loads the bean, the information is retrieved and displayed. Though if I clean and build the project again, when it runs the second time it displays the same WELD-000119 error.
I copy and pasted just the code to make the RTU section run to a new project and the server doesn't ever throw this error, and it works every time the bean is requested and every time the server is started.
Edit 1:
When I restart NetBeans and Clean and Build the project after it starts it says this:
Note: C:\Users\Administrator\Documents\NetBeansProjects\OIUSA_1\src\java\Beans\RTU\RTU_SmallView_Bean.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
This is the only java class it says this about, so here is the code I used for that class:
package Beans.RTU;
import Database.RTU.RTU_SmallView_Select;
import java.util.ArrayList;
import java.util.List;
import javax.inject.Named;
import javax.enterprise.context.RequestScoped;
import pojo.rtu.RTU_unit;
/**
*
* #author Administrator
*/
#Named(value = "rtu_SmallView_Bean")
#RequestScoped
public class RTU_SmallView_Bean {
public RTU_SmallView_Bean() {
try {
RTU_SmallView_Select selectData;
selectData = new RTU_SmallView_Select();
this.smallViewList = selectData.getData();
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
List<RTU_unit> smallViewList = new ArrayList();
String unit_type;
int unit_number;
String rig_name;
String location_name;
public List<RTU_unit> getSmallViewList() {
return smallViewList;
}
public void setSmallViewList(List<RTU_unit> smallViewList) {
this.smallViewList = smallViewList;
}
public String getUnit_type() {
return unit_type;
}
public void setUnit_type(String unit_type) {
this.unit_type = unit_type;
}
public int getUnit_number() {
return unit_number;
}
public void setUnit_number(int unit_number) {
this.unit_number = unit_number;
}
public String getRig_name() {
return rig_name;
}
public void setRig_name(String rig_name) {
this.rig_name = rig_name;
}
public String getLocation_name() {
return location_name;
}
public void setLocation_name(String location_name) {
this.location_name = location_name;
}
}
My project structure is as follows:
Sources:
Beans.RTU.RTU_SmallView_Bean.java
Database.RTU.RTU_SmallView_Select.java
pojo.rtu.RTU_unit.java
Webpages:
rtu.rtu_smallview.xhtml
I am thinking it has something to do with the actual server, but I'm not sure where to start looking for this error. If you would like to see the actual code for the beans and what not, let me know and I'll edit the question with all the code. Thanks

Problem has been solved, the file RTU_Unit.java was in a folder called pojo.rtu. I deleted the folder, made it again with a new name pojo.rtus, refactored the file RTU_Unit.java for the new folder and the problem has gone away.

gwt: creating an instance of Window causes application to hang out

Inside a legacy application, i am creating a new class MyForm, and modify the existing class MyPanel by adding a reference to MyForm:
import com.smartgwt.client.widgets.layout.VLayout;
public class MyPanel extends VLayout
{
public static MyForm myForm = null;
public MyPanel() {
myForm = new MyForm();//the line causing trouble
}
}
and:
public class MyForm extends com.smartgwt.client.widgets.Window
{
private static TextItem myTextItem;
public MyForm()
{
//other lines of code
myTextItem.setValue("some value");
}
}
When commenting the initialization of MyForm, the application works as it did before; when i uncomment this line, the application hangs out. The main page of the application is loading forever.
There are no compiler warnings displayed in my IDE (Eclipse), also no error logs/stack trace appear in the log files of the server (Apache Tomcat).
However, the browser console displays the following warning:
*11:55:42.978:WARN:Log:Uncaught exception escaped: com.google.gwt.core.client.JavaScriptException (TypeError) : Cannot
read property 'oq' of null
at new JEb(ra-0.js)
at xHb(ra-0.js)
at new EHb(ra-0.js)
at iFb(ra-0.js)
at UFb(ra-0.js)
at XFb(ra-0.js)
at aA(ra-0.js)
at nd(ra-0.js)
at Id(ra-0.js)
at eval(ra-0.js)
at Gb(ra-0.js)
at Jb(ra-0.js)
at eval(ra-0.js)
GWT version: 2.8.0
Tomcat version: 8.0

Scheduling jobs using dropwizard-sundial

I am trying to use dropwizard-sundial and am having trouble with a resource. I'm not sure if it's a classpath issue or if I am failing to register resources properly.
This is my application class' run method:
public void run(DataLoaderApplicationConfiguration configuration, Environment environment) throws Exception {
logger.info("Started DataLoader Application");
final String template = configuration.getTemplate();
environment.healthChecks().register("TemplateHealth", new TemplateHealthCheck(template));
// JOBS
environment.jersey().packages("com.tradier.dataloader.jobs");
}
I get the following error at runtime:
INFO [2015-04-07 15:00:19,737] com.xeiam.sundial.plugins.AnnotationJobTriggerPlugin: Loading annotated jobs from com.tradier.dataloader.jobs.
[WARNING]
java.lang.reflect.InvocationTargetException
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:601)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.RuntimeException: Unexpected problem: No resource for com/tradier/dataloader/jobs
at org.quartz.classloading.CascadingClassLoadHelper.getJobClasses(CascadingClassLoadHelper.java:217)
at com.xeiam.sundial.plugins.AnnotationJobTriggerPlugin.start(AnnotationJobTriggerPlugin.java:72)
at org.quartz.QuartzScheduler.startPlugins(QuartzScheduler.java:1102)
at org.quartz.QuartzScheduler.start(QuartzScheduler.java:211)
at com.xeiam.sundial.SundialJobScheduler.startScheduler(SundialJobScheduler.java:102)

Check out a working example at https://github.com/timmolter/XDropWizard. It uses annotated jobs. You need to add the package name conatining the annotated jobs in your config.yaml file like this:
sundial:
thread-pool-size: 5
shutdown-on-unload: true
wait-on-shutdown: false
start-delay-seconds: 0
start-scheduler-on-load: true
global-lock-on-load: false
annotated-jobs-package-name: org.knowm.xdropwizard.jobs
If you still are getting an exception, leave a report at: https://github.com/timmolter/dropwizard-sundial/issues.

#Jeyashree Narayanan, the jobs package should not be configured in the application class as you have shown, it can be easily done in the yml file. Here is the explanation in simple steps:
Step 1: Configuration in yml file and the Configuration class
sundial:
thread-pool-size: 10
shutdown-on-unload: true
start-delay-seconds: 0
start-scheduler-on-load: true
global-lock-on-load: false
annotated-jobs-package-name: com.tradier.dataloader.jobs
tasks: [startjob, stopjob]
Configuration Class:
#JsonIgnoreProperties(ignoreUnknown = true)
public class DropwizardSundialConfiguration extends Configuration {
#Valid
#NotNull
public SundialConfiguration sundialConfiguration = new SundialConfiguration();
#JsonProperty("sundial")
public SundialConfiguration getSundialConfiguration() {
return sundialConfiguration;
}
}
Step 2: Add and configure the dropwizard-sundial bundle in the application class.
public class DropwizardSundialApplication extends Application<DropwizardSundialConfiguration> {
private static final Logger logger = LoggerFactory.getLogger(DropwizardSundialApplication.class);
public static void main(String[] args) throws Exception {
new DropwizardSundialApplication().run("server", args[0]);
}
#Override
public void initialize(Bootstrap<DropwizardSundialConfiguration> b) {
b.addBundle(new SundialBundle<DropwizardSundialConfiguration>() {
#Override
public SundialConfiguration getSundialConfiguration(DropwizardSundialConfiguration configuration) {
return configuration.getSundialConfiguration();
}
});
}
}
Step 3: Add the required job classes.
Here is a sample Cron job class:
#CronTrigger(cron = "0 19 13 * * ?")
public class CronJob extends Job {
private static final Logger logger = LoggerFactory.getLogger(CronJob.class);
#Override
public void doRun() throws JobInterruptException {
logger.info("Hello from Cron Job");
}
}
I have also written a blog post and a working application which is available on GitHub with these steps. Please check: http://softwaredevelopercentral.blogspot.com/2019/05/dropwizard-sundial-scheduler-tutorial.html

It appears to be a classpath issue.
From https://github.com/timmolter/Sundial/blob/develop/src/main/java/com/xeiam/sundial/SundialJobScheduler.java#L102:
public static void startScheduler(int threadPoolSize, String annotatedJobsPackageName) {
try {
createScheduler(threadPoolSize, annotatedJobsPackageName);
getScheduler().start(); // ---> Line 102
} catch (SchedulerException e) {
logger.error("COULD NOT START SUNDIAL SCHEDULER!!!", e);
throw new SchedulerStartupException(e);
}
I'm also using Sundial in my dropwizard project, I have all my jobs defined in jobs.xml, Sundial config defined in the .yaml file, and start it as follows:
SundialJobScheduler.startScheduler();
SundialManager sm = new SundialManager(config.getSundialConfiguration(),environment);
environment.lifecycle().manage(sm);

Can't connect to my tomcat 8 websocket

I have written a client program that connects to my websocket on the server. I set up tomcat8 with the examples working and hit the EchoAnnotation endpoint with my client program.
I wrote this endpoint program as follows:
#ServerEndpoint(value = "/websocket")
public class PortServer implements AirMessageListener {
public PortServer() { }
#OnOpen
public void start(Session session) {
//do stuff
}
#OnClose
public void end() {
//do stuff
}
}
#OnMessage
public void incoming(String message) {
//do stuff
}
#OnError
public void onError(Throwable tw) throws Throwable {
//do stuff
}
I compile this and create a war file called portserver and drop it into my tomcat webapps directory. I then switched my client program from connecting to: ws://localhost:8080/examples/websocket/echoAnnotation to ws://localhost:8080/portserver/websocket and run it. I get:
Connecting to:ws://localhost:8080/portserver/websocket
Exception in thread "main" com.corrisoft.air.exception.AirException: Error connecting to server
at com.corrisoft.air.socket.AirSocketClient.<init>(AirSocketClient.java:60)
at test.corrisoft.air.portserver.SocketConversation.<init>(SocketConversation.java:46)
at test.corrisoft.air.portserver.RunPortServerTester.initConfigProperties(RunPortServerTester.java:76)
at test.corrisoft.air.portserver.RunPortServerTester.<init>(RunPortServerTester.java:34)
at test.corrisoft.air.portserver.RunPortServerTester.main(RunPortServerTester.java:109)
Caused by: javax.websocket.DeploymentException: Handshake error.
at org.glassfish.tyrus.client.ClientManager$1$1.run(ClientManager.java:466)
at org.glassfish.tyrus.client.ClientManager$1.run(ClientManager.java:502)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.glassfish.tyrus.client.ClientManager$SameThreadExecutorService.execute(ClientManager.java:654)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:359)
at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:195)
at com.corrisoft.air.socket.AirSocketClient.<init>(AirSocketClient.java:58)
... 4 more
Caused by: org.glassfish.tyrus.core.HandshakeException: Response code was not 101: 404.
at org.glassfish.tyrus.core.Handshake.validateServerResponse(Handshake.java:279)
at org.glassfish.tyrus.client.TyrusClientEngine.processResponse(TyrusClientEngine.java:138)
at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientFilter.handleHandshake(GrizzlyClientFilter.java:318)
at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientFilter.handleRead(GrizzlyClientFilter.java:288)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:291)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:209)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:137)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:115)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:550)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:744)
I placed an index.html inside my portserver app and can hit: http://localhost:8080/portserver just fine, which means the directories are OK. I then verified that my class was in my WEB-INF/classes directory.
I looked at the examples and found the ExamplesConfig class that I thought might be a "magic" class that enables the endpoints, so I implemented my own and and stuck in the jar file.
/**
*
*/
package com.corrisoft.air.portserver;
import java.util.HashSet;
import java.util.Set;
import javax.websocket.Endpoint;
import javax.websocket.server.ServerApplicationConfig;
import javax.websocket.server.ServerEndpointConfig;
/**
* #author Corrisoft Android Development
*/
public class WebSocketConfig implements ServerApplicationConfig {
/* (non-Javadoc)
* #see javax.websocket.server.ServerApplicationConfig#getAnnotatedEndpointClasses(java.util.Set)
*/
#Override
public Set<Class<?>> getAnnotatedEndpointClasses(Set<Class<?>> scanned) {
// Deploy all WebSocket endpoints defined by annotations in the
// web application. Filter out all others to avoid issues when running
// tests on Gump
Set<Class<?>> results = new HashSet<>();
for (Class<?> clazz : scanned) {
if (clazz.getPackage().getName().startsWith("com.corrisoft.air")) {
System.out.println("Adding endpoint for:" + clazz.getName());
results.add(clazz);
}
}
return results;
}
/* (non-Javadoc)
* #see javax.websocket.server.ServerApplicationConfig#getEndpointConfigs(java.util.Set)
*/
#Override
public Set<ServerEndpointConfig> getEndpointConfigs( Set<Class<? extends Endpoint>> scanned) {
return null;
}
}
It does not seem to be running this class.
Is there some configuration I missed?

Turns out that the problem was that one of my dependent classes was missing from the classpath. Tomcat 8, under these circumstances, doesn't add the endpoint and doesn't throw an exception into the log.
I deployed the same war file to tomcat 7 and got an exception. Worked the classpath until it was good and then deployed back to tomcat 8 where it is now working.
I created defect 56442 here: https://issues.apache.org/bugzilla/show_bug.cgi?id=56442 for tomcat eating the exception instead of displaying in the log.

For anyone else plagued by this; take a CLOSE look at your URI. I was piecing my url together, based on a configuration file. I missed a single "/" character when constructing the URL, and was convinced that it was correct! If you do stuff like the following, I suggest, printing out the "constructed URL" and studying that closely before chasing your tail:
public static final String WEBSOCKETHOST = "localhost"; // TODO: Get from configuration
public static final int WEBSOCKETPORT = 10080; // TODO: Get from configuration
public static final String WEBSOCKETSERVERROOT = "/sceagents"; // TODO: Get from configuration
public static final String WEBSOCKETSERVERENDPOINT = "neo"; // TODO: Get from configuration
public static final String WEBSOCKETPROTOCOL = "ws"; // TODO: Get from configuration
String uri = WEBSOCKETPROTOCOL + "://" + WEBSOCKETHOST + ":" + Integer.toString(WEBSOCKETPORT) + WEBSOCKETSERVERROOT + "/" + WEBSOCKETSERVERENDPOINT;

Error using neo4j with jdk 1.7

I am using Java 1.7 with neo4j-community-2.0-1.1 to build a sample neo4j graph database. Please see below my code
import org.neo4j.graphdb.Direction;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
public class showData {
private static final String Neo4J_DBPath = "/Technology/neo4j-community-2.0-1.1";
/**
* #param args
*/
Node first;
Node second;
Relationship relation;
GraphDatabaseService graphDataService;
//List of relationships
private static enum RelationshipTypes implements RelationshipType
{
KNOWS
}
public static void main(String[] args)
{
showData data = new showData();
data.createDatabase();
data.removeData();
data.shutDown();
}
void createDatabase()
{
//GraphDatabaseService
graphDataService = new GraphDatabaseFactory().newEmbeddedDatabase(Neo4J_DBPath);
// Begin transaction
Transaction transaction = graphDataService.beginTx();
try
{
// create nodes and set the properties the nodes
first = graphDataService.createNode();
first.setProperty("Name", "Ravneet Kaur");
second = graphDataService.createNode();
second.setProperty("Name", "Harpreet Singh");
//specify the relationships
relation = first.createRelationshipTo(second, RelationshipTypes.KNOWS);
relation.setProperty("relationship-type", "knows");
//success transaction
System.out.println(first.getProperty("name").toString());
System.out.println(relation.getProperty("relationship-type").toString());
System.out.println(second.getProperty("name").toString());
transaction.success();
}
finally
{
transaction.finish();
}
}
void removeData()
{
Transaction transaction = graphDataService.beginTx();
try
{
first.getSingleRelationship(RelationshipTypes.KNOWS,Direction.OUTGOING).delete();
System.out.println("Nodes are deleted");
//delete the nodes
first.delete();
second.delete();
transaction.success();
}
finally
{
transaction.finish();
}
}
void shutDown()
{
graphDataService.shutdown();
System.out.println("Database is shutdown");
}
}
Earlier I was using Jave 1.6 to compile this code, but got to know that this neo4j jar complies with jdk 1.7. So I changed it to JDK 1.7 and made all necessary changes in Installed JRE, Execution Environments and Java Build Path in eclipse to point to latest java.
Now I get the following error
Exception in thread "main" java.lang.RuntimeException: Error starting org.neo4j.kernel.EmbeddedGraphDatabase, /Technology/neo4j-community-2.0-1.1
at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:330)
at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:63)
at org.neo4j.graphdb.factory.GraphDatabaseFactory$1.newDatabase(GraphDatabaseFactory.java:92)
at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:198)
at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:69)
at com.PNL.data.neo4j.showData.createDatabase(showData.java:45)
at com.PNL.data.neo4j.showData.main(showData.java:34)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.transaction.XaDataSourceManager#7594035c' was successfully initialized, but failed to start. Please see attached cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:509)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115)
at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:307)
... 6 more
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource#24367e26' was successfully initialized, but failed to start. Please see attached cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:509)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115)
at org.neo4j.kernel.impl.transaction.XaDataSourceManager.start(XaDataSourceManager.java:164)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:503)
... 8 more
Caused by: org.neo4j.kernel.impl.storemigration.UpgradeNotAllowedByConfigurationException: Failed to start Neo4j with an older data store version. To enable automatic upgrade, please set configuration parameter "allow_store_upgrade=true"
at org.neo4j.kernel.impl.storemigration.ConfigMapUpgradeConfiguration.checkConfigurationAllowsAutomaticUpgrade(ConfigMapUpgradeConfiguration.java:39)
at org.neo4j.kernel.impl.storemigration.StoreUpgrader.attemptUpgrade(StoreUpgrader.java:71)
at org.neo4j.kernel.impl.nioneo.store.StoreFactory.tryToUpgradeStores(StoreFactory.java:144)
at org.neo4j.kernel.impl.nioneo.store.StoreFactory.newNeoStore(StoreFactory.java:124)
at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.start(NeoStoreXaDataSource.java:323)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:503)
... 11 more
BTW: Also my neo4j configuration parameter "allow_store_upgrade" is set to "true".
Any help will be really appreciated.
Regards

In your code the configuration is not picked up. To change this use the following snippet to initialize your db:
GraphDatabaseService graphDb = new GraphDatabaseFactory()
.newEmbeddedDatabaseBuilder(Neo4J_DBPath)
.loadPropertiesFromFile("confdir/neo4j.properties")
.newGraphDatabase();
Make sure neo4j.properties contains allow_store_upgrade=true. Alternatively you can use the deprecated setConfig(name, value) on the factory.