I am using R2DBC-H2 driver, and my UR.L is spring.r2dbc.url=r2dbc:h2:mem:///customer
Using this configuration, SpringBoot starts fine, however, I can not access the h2-console.
Does anybody know why, and how I can fix it?
If I understand the source code of H2ConsoleAutoConfiguration correctly, the h2 console auto configuration from spring boot does not work in a reactive environment.
...
#ConditionalOnWebApplication(type = Type.SERVLET)
...
public class H2ConsoleAutoConfiguration {
You can confirm this by yourself by changing the type of your web application to SERVLET (for example, by adding spring-boot-starter-web as a dependency) which will activate the route to the h2 console (if enabled in the application properties). The h2-console route endpoint will start working again.
As the whole code seems very servlet-specific, I don't know how to properly fix this problem.
H2 Console depends on traditional Jdbc drivers, not compatible with Spring WebFlux stack.
If you are developing a WebFlux application, you can use H2 as a standalone database, ane use H2 Console freely.
Following the official Getting Started guide to start H2 Database and H2 Console.
Set your spring.r2dbc.url to the database url you are running in the first step.
NOTE: Do not use a Memory DB here.
Related
Context: Existing JavaSE application written in Swing which fires up an embedded server (so far it was Jetty) but we need to switch to Java EE, so we thought about bringing in an enterprise container (candidates are: Payara, Tomee, Wildfly).
The server should be able to run a web app based on dynamic input: web context, with its own web.xml, specific web resources which are not known at build time, so uber jar is not really an option for us.
We have successfully started a web app on Payara using code like the following (this is not working code, but it shows the steps we took for using Payara)
GlassFish glassfish;
WebContainer container;
GlassFishRuntime glassfishRuntime = = GlassFishRuntime.bootstrap();
glassfish = glassfishRuntime.newGlassFish();
glassfish.start();
// Access WebContainer
container = glassfish.getService(WebContainer.class);
WebContainerConfig config = new WebContainerConfig();
container.setConfiguration(config);
Context context = container.createContext(contextPathLocation);
m_webAppContexts.put(p_contextName, context);
WebListener listener = container.createWebListener("listener-1", HttpListener.class);
listener.setPort(myDynamicPortNumber);
container.addWebListener(listener);
container.addContext(context, myDynamicContextPath);
context.addServlet(myDynamicMapping, myServletName);
This is all working and a basic web application starts in Payara when invoked from our Java SE application.
We also have a fragment of web.xml declaring additional servlets that we want to bring in this dynamic deployment if given conditions are satisfied.
What is the best way to override the existing web.xml with fragments from another web.xml? We need pointers to documentation, directions from more experienced Payara users.
This is not possible with Payara or Wildfly, as they work very differently from how Jetty works.
However, it is possible with Tomee.
I am porting a suite of related applications from WebLogic to JBoss EAP v6.2.
I have set up a data source connection using the JBoss command line interface and hooked it to an oracle database. This database has a name of "mydatasource" and a JNDI name of
"java:jboss/datasources/mydatasource" as per JBoss standards. I can test and validate this database connection.
However, when I try to port the code and run it, the connection doesn't work. The code that worked in WebLogic was simply:
InitialContext ic = new InitialContext() ;
DataSource ds = (DataSource)ic.lookup(dataSource) ;
with a value in dataSource of "mydatasource".
This worked in Web Logic but in JBoss it throws a NameNotFoundException
javax.naming.NameNotFoundException: mydatasource-- service jboss.naming.context.java.mydatasource
Clearly there is a difference in how the InitialContext is set up between the two servers.
But this port involves a large number of small applications, all of which connect to the datasource via code like that above. I don't want to rewrite all that code.
Is there a way through configuration (InitialContextFactory, maybe) to define the initial context such that code like that above will work without rewriting, or perhaps is there another way of naming the datasource that JBoss will accept that would allow code like that above to work without rewriting?
Or must we bite the bullet and accept that this code needs a rewrite?
Update: Yes, I know that simply passing "java:jboss/datasources/mydatasource" to the InitialContext lookup solves the problem, but I am looking for a solution via configuration, rather than via coding if there is such a solution.
The way to do this correctly through configuration is to use
java:comp/env/jdbc/myDataSource
then use resource-ref in web.xml to map it to the declare datasource and use weblogic.xml or jboss-web.xml to actually map it to the real one
in weblogic admin console, when you define datasource it can be jdbc/realDataSource
JNDI path Tomcat vs. Jboss
For weblogic http://docs.oracle.com/cd/E13222_01/wls/docs103/jdbc_admin/packagedjdbc.html
i'am trying to integrate hybris 4.7.9 with endeca. I have installed the following endeca components. 1)MDEX engine 2)Platform services 3)Endeca workbench 4)CAS.
I have deployed a sample application on endeca side using "D:\Endeca\ToolsAndFrameworks\11.0.0\deployment_template\bin\deploy.bat"
In Hyend2 in admincockpit of hybris
I have made EAC/CAS connection with my appication and made a export job.
Problem is i am not able to run that job, it reports me following error:
http://localhost:8500/MyAppen_en_data/?wsdl returned response code 404
at com.endeca.itl.service.ServiceLocator.getService(ServiceLocator.java:150)
I don't know Hybris, but since the error is related to Endeca, let me try to give some pointers.
CAS: Check that CAS is up and running
App Name: You might have specified app-name-with-locale (MyAppen) somewhere where you need to specify only app-name (MyApp). [The Endeca app name without the locale is called as "Base Application Name". Go back and check all your configurations in Hybris and Endeca].
You may also refer to this blog (Although it is for ATG framework, it should give idea for Hybris as well).
I'm using neo4j in a glassfish server through a modified version of Alex Smirnov neo4j JCA connector.
My version is available here : https://github.com/Riduidel/neo4j-connector
I'm using this connector with neo4j 1.8.
As a consequence, when i want to use it, i first install the connector in my Glassfish application server, then use this connector in applications wishing to connect to.
It works OK when using it with fresh stores.
But, when using it with stores created with previous version, I encounter weird bugs.
Typically, I got today the following stack
javax.resource.spi.ResourceAllocationException: Error in allocating a connection. Cause: Failed to transition org.neo4j.kernel.InternalAbstractGraphDatabase$DefaultKernelExtensionLoader#3bbd53b1 from NONE to STOPPED
...
...
.../* JCA internal exception stack */
...
...
Caused by: com.sun.appserv.connectors.internal.api.PoolingException: Failed to transition org.neo4j.kernel.InternalAbstractGraphDatabase$DefaultKernelExtensionLoader#494b584c from NONE to STOPPED
at com.sun.enterprise.resource.pool.ConnectionPool.createSingleResource(ConnectionPool.java:924)
at com.sun.enterprise.resource.pool.ConnectionPool.createResource(ConnectionPool.java:1185)
at com.sun.enterprise.resource.pool.datastructure.RWLockDataStructure.addResource(RWLockDataStructure.java:98)
... 66 more
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Failed to transition org.neo4j.kernel.InternalAbstractGraphDatabase$DefaultKernelExtensionLoader#494b584c from NONE to STOPPED
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:388)
at org.neo4j.kernel.lifecycle.LifeSupport.init(LifeSupport.java:82)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:116)
at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:227)
at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:79)
at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:70)
at com.netoprise.neo4j.AbstractNeo4jManagedConnectionFactory.createDatabase(AbstractNeo4jManagedConnectionFactory.java:165)
at com.netoprise.neo4j.AbstractNeo4jManagedConnectionFactory.createDatabase(AbstractNeo4jManagedConnectionFactory.java:127)
at com.netoprise.neo4j.Neo4jManagedConnectionFactory.createManagedConnection(Neo4jManagedConnectionFactory.java:163)
at com.sun.enterprise.resource.allocator.ConnectorAllocator.createResource(ConnectorAllocator.java:160)
at com.sun.enterprise.resource.pool.ConnectionPool.createSingleResource(ConnectionPool.java:907)
... 68 more
Caused by: java.lang.AssertionError
at org.neo4j.index.impl.lucene.LuceneDataSource.cleanWriteLocks(LuceneDataSource.java:265)
at org.neo4j.index.impl.lucene.LuceneDataSource.cleanWriteLocks(LuceneDataSource.java:260)
at org.neo4j.index.impl.lucene.LuceneDataSource.cleanWriteLocks(LuceneDataSource.java:260)
at org.neo4j.index.impl.lucene.LuceneDataSource.cleanWriteLocks(LuceneDataSource.java:260)
at org.neo4j.index.impl.lucene.LuceneDataSource.<init>(LuceneDataSource.java:185)
at org.neo4j.index.lucene.LuceneIndexProvider.load(LuceneIndexProvider.java:72)
at org.neo4j.kernel.InternalAbstractGraphDatabase$DefaultKernelExtensionLoader.loadIndexImplementations(InternalAbstractGraphDatabase.java:1171)
at org.neo4j.kernel.InternalAbstractGraphDatabase$DefaultKernelExtensionLoader.init(InternalAbstractGraphDatabase.java:1143)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:382)
... 78 more
A fast inspection reveals that this exception is linked to an undeletable "write.lock" file. My write.lock file can't be deleted because I guess migration is not over.
How can I make sure the migration is done before using it without migrating it outside of Glassfish ?
Is there a way to ahve exclusive store migrations in that context ? And if so, how ?
And is it the solution for my problem ?
EDIT 1 Added exception message.
EDIT 2 All this only happen when loaded graph was previously used with a Neo4j 1.5 and now with a Neo4j 1.8 connector. when graph is created by connector, absolutely no error happens.
EDIT 3 Strangely enough, this happens as long as there is no debugger plugged into that code : as soon as I try to debug it, the issue stop appearing. Which make me thinking there may be a migration cleanup mechanism that remvoe the write lock once migration is done, and this cleanup is not performed when using my neo4j JCA connector. Is it a valid observation ?
I am not too familiar with the JCA connector, but to be sure, I would just write a very small migration java class that opens the database, lets it migrate and shut down. Then try it again with the JCA connector?
After further investigations, truth revealed to not be in multiple calls to the EmbeddedGraphDatabase constructor, but instead to multiple identicail IndexProvider being loaded.
I use neo4j embedded in an open-source JCA connector.
In this connector, the org.neo4j.kernel.Service class is replaced by a custom one which contains a workaround regarding service loading for JBoss non shared libraries.
Unfortunatly, in our context, this workaround implies loading twice the index provider :
once using the EAR classloader
once using the Glassfish library classloader.
Why ?
Because, as our neo4j instance is using for application data AND for authentication, neo4j connector jar is put in ${domain}/lib. As a consequence, due to Classloader delegation in application server, the EAR classloader delegates to the Glassfish library classloader, and find this way the LuceneIndexProvider. Then, the Glassfish library classloader is directly used to load the same LuceneIndexProvider class.
This concludes by us having two LuceneIndexProvider objects, both trying to migrate the lucene index. Which lead to the AssertionError as the write.lock file created by the first object should be deleted by the second one, which can't do that.
I've then changed slightly that very specific class to use JBoss workaround only when default loading mechanism do not return any class (seee commit here). This small change worked like a charm, so I think you can considered this issue as fixed.
I get this error:
StandardWrapperValve[Vaadin Servlet]: PWC1406: Servlet.service() for servlet Vaadin Servlet threw exception
java.lang.ClassCastException: com.delhi.entities.Category cannot be cast to com.delhi.entities.Category
when I try to run my webapps on glassfish v2.
Category is a JPA entity object
the offending code according to the server log is:
for (Category c : categories) {
mymethod();
}
categories is derived from:
List<Category> categories = q.getResultList();
Any idea what went wrong?
This is a class loader issue. If a class is loaded by different class loaders, it's objects cannot be assigned to each other. You have probably passed an object from one WAR into another one. There are several options to resolve this:
Put all your code into a single WAR.
Use some form of remoting between your WARs. Serialization takes care of the class loader problem.
Try putting all you WARs into a single EAR. If that doesn't work, put all code into JARs that are on the EAR's Classpath in the MANIFEST.MF.
I once had the same problem and the environment I had was following:
I had Glassfish v4
Netbeans with following projects
webpage war project containing entities
and ear project with that webpage war project
The problem was that in war's project settings I had checked [x] Run>Deploy on save. This was causing deploying war project everyime I hit save. It was sometimes leading to PermGen (memory) problems and unability to deploy EAR correctly (because e.g. in between undeploying and deploying EAR - this "crazy" Netbeans was deploying this war).
Solution: If Netbeans && using EAR, then uncheck deploy on save in project properties.
EDIT:
it seems that this error is connected with
SEVERE: The web application [/faces] created a ThreadLocal with key of type [org.glassfish.pfl.dynamic.codegen.impl.CurrentClassLoader$1] (value [org.glassfish.pfl.dynamic.codegen.impl.CurrentClassLoader$1#249ea63a]) and a value of type [org.glassfish.web.loader.WebappClassLoader] (value [WebappClassLoader (delegate=true; repositories=WEB-INF/classes/)]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
I've had same problem today. Solution was closing EntityManagerFactory after use.
This answer helped me:
https://stackoverflow.com/a/13823219/2455506
I'm experiencing this problem too with Glassfish v2 and Glassfish v3.
Can I ask you a question: Are you attempting to initialize any persistence object when the application is deployed (through a servlet loaded on startup or a context listener)?
Like bguiz, I've noticed this problem only happens on redeploy. A new deploy to a freshly restarted Glassfish server, never has this problem.
Like FelixM mentioned, I'm convinced this is a class loader issue, however I don't believe it's an issue with multiple wars (I only have 1 deployed to my server). In Glassfish 3, I can see that my WAR is utilizing 2 Glassfish "engines". One for the web(war) and one for the jpa. From what I understand, these are different containers each with their own classloader. I'm guessing Glassfish v2 works in the same manner.
I'm using Spring and (re)initialize some persistence objects on (re)deploy. What I'm thinking, is that while the web engine is reinitializing the war, the jpa engine is still using the old class definitions. Often if I retry the redeploy after this initial failure, it may succeed (sometimes it may take more than one retry but eventually I can get it to succeed without a restart - having better success with Glassfish v3 than v2).
At this point I'm thinking that either these two classloaders are out of sync or there is some sort of race condition on redeploy allowing this operation to sometimes succeed. I've tried to force the classloader, writing code like this
HashMap<Object, Object> properties = new HashMap<Object, Object>();
properties.put(PersistenceUnitProperties.CLASSLOADER, this.getClass().getClassLoader());
entityManagerFactory = Persistence.createEntityManagerFactory(jpaContext, properties);
but it didn't seem to have any affect.
I'm also wondering if eliminating the initialization at startup could fix the problem, giving the appserver time to resynchronize both engines before using any jpa classes (which is why I asked my follow up question).
My observation is that it only happens when using a hot redeploy or a static redeploy. This only applies, of course, if you get a class cast exception where both the to and from classes are the same.
Workarounds:
Don't use undeploy and deploy instead of redeploy
Restart app server
Remove static members of the affected classes
Use a remote interface (serialization makes this go away)
IMO I think the class loader was unable to reload the class and the old version was reused, resulting in the error.
This article doesn't talk about this error directly, but it is good background info on how the class loader works.