my primary attempt is to build a CRUD app using Roo, following the example here:
https://www.icts.uiowa.edu/confluence/display/ICTSit/Spring+Roo+Tutorial
I am using Roo 1.2.5, Maven 3.1.1, and Spring 3.2.6 on JRE7.
This has been the best tutorial I have found so far. If anyone has a better example, please share!
However, when I execute the project in my Tomcat environment things still break. The primary error from there is:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NoClassDefFoundError: org/springframework/util/MimeType
I have built multiple projects using Roo over the past few days, either from this tutorial or 10 others that all start with the reverse engineer command, and all give me the same type of a NoClassDefFoundError, either with this class or another. I understand this means that my pom.xml is more than likely incorrect, but I am hoping this is an issue with my configuration rather than something all Roo developers have simply accepted as manual maintenance.
Any advice would be tremendous... is it possible that the version of Roo combined with Spring and Maven I am using is simply buggy? I would love to use this framework/toolkit, but am nearing the point where manually writing the scaffolding by hand may be more straightforward.
.... UPDATE:
By adding the following dependency manually, I was able to run the project. However, I want to leave the question open to see if anyone further knows whether this missing jar is a known bug given the version of Spring Roo I am using, or otherwise:
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.2</version>
</dependency>
Thanks!
The best examples are those included in Roo: clinic.roo, pizzashop.roo, etc
Just run Roo and execute any of them as follows:
/_/ |_|\____/\____/ 1.2.4.RELEASE [rev 75337cf]
Welcome to Spring Roo. For assistance press TAB or type "hint" then hit ENTER.
roo> script --file clinic.roo
On the other side, the reference doc is a good starting point: http://docs.spring.io/spring-roo/reference/html/
Finally, about java.lang.NoClassDefFoundError: org/springframework/util/MimeType note MimeType class was included in Spring 4 and Roo sets up your project for Spring 3, so you must customize the pom.xml as needed.
Related
I am using Maven and Spring Boot. I run the application using mvn spring-boot:run.
https://flywaydb.org/documentation/plugins/springboot says Flyway should be called on Spring Boot start.
So my pom.xml contains the dependency to Flyway.
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
<version>4.1.2</version>
</dependency>
The first time I ran the Maven command above it downloaded Flyway stuff, so I think the dependency is working.
I have the following files:
./src/main/resources/db/migration/V123__foo.sql
./src/main/resources/application.properties
The above article implied it should "just work", but I don't understand where it would find the JDBC URL to the database. So I added the following to the application.properties file:
flyway.url=jdbc:postgresql://localhost:5432/services?user=postgres&password=postgres
flyway.enabled=true
When Spring Boot starts up (and loads and makes available my web application) there are no logs from Flyway. I think Flyway is ignored.
What can I do? Or, more generally, how would I go about debugging this problem myself?
Nobody has posted an answer so I'll post what I found out.
M. Deinum was indeed correct in their comments to the question, the problem was a lack of a data source.
My original question was what the approach should be to debugging this kind of issue. Obviously one option is to post to stackoverflow :) But I wanted to know how to do it myself.
Spring Boot has a number of classes which look at your code and classpath, and act appropriately. For example, there are classes providing implementations to the rules like "if Flyway is on the path, and there is a data source, then execute Flyway". That rule wasn't getting triggered in my case, because I had no data source.
It's not the case that the code you write calls Spring Boot, it's the other way around, Spring Boot (external to your code) inspects your code and decides what to do based on rules. This architecture is known as action at a distance. The main problem with action at a distance is it's very difficult to debug.
The only real way to find the solution, and it was the way I went about confirming M. Deinum's diagnostic, is to read the Spring Boot source code and understand the annotations which are used to create Spring Boot code.
From the source code to Spring Boot's Flyway integration we see
#ConditionalOnClass(Flyway.class)
#ConditionalOnBean(DataSource.class)
This means "this code will get executed if Flyway is on the classpath, and if there is a DataSource bean available; otherwise it silently won't get executed".
So the answer to the question "how to debug this problem" is that there is no mechanism other than to read the source code of Spring Boot and find out how it works.
If you want to avoid this sort of problem, you have to avoid frameworks which work via "action at a distance", and that includes Spring Boot.
I am trying to run my spring boot application (via Run As -> Spring Boot Application) in a tomcat8 container on STS and I am receiving these errors:
Caused by: java.lang.IllegalStateException: Expected method not found: java.lang.NoSuchMethodException: org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedContext.addApplicationListener(org.apache.catalina.deploy.ApplicationListener)
at org.springframework.util.ClassUtils.getMethod(ClassUtils.java:627)
at org.springframework.boot.autoconfigure.websocket.TomcatWebSocketContainerCustomizer.addListener(TomcatWebSocketContainerCustomizer.java:85)
at org.springframework.boot.autoconfigure.websocket.TomcatWebSocketContainerCustomizer.access$100(TomcatWebSocketContainerCustomizer.java:36)
at org.springframework.boot.autoconfigure.websocket.TomcatWebSocketContainerCustomizer$1.customize(TomcatWebSocketContainerCustomizer.java:50)
at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.configureContext(TomcatEmbeddedServletContainerFactory.java:355)
at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.prepareContext(TomcatEmbeddedServletContainerFactory.java:184)
at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:154)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:157)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:130)
... 7 more
I have searched around for this quite a bit and have found little to guide me in figuring out what the problem is. After going through the spring boot code in the debugger I see that the object named "instance" referenced in the TomcatWebSocketContainerCustomizer.addListener() uses reflection to retrieve a handle to it. This object is associated with the tomcat 7.0.53 jar ($HOME/.m2/repository/org/apache/tomcat/tomcat-catalina/7.0.53/tomcat-catalina-7.0.53.jar). I do not see this in any of my maven dependencies and have tried several techniques to force it to tomcat 8.0.20, nothing seems to work.
After banging my head for a while I started looking at the run configuration for the project in STS (via Run As -> Run Configurations). I found that the Source tab shows tomcat 7.0.53 above version 8.0.20 along with several dependencies that aren't referenced in maven. I am at a loss on where these values come from and not sure how to edit it. For some reason when I try to manually delete these legacy jar files STS doesn't allow me to delete any of them.
Does anyone have an idea of where these dependencies may be coming from and how I can remove them?
They do reference my $HOME/.m2/path/to/tomcat-catalina/<version> dir, so I could simply remove them from my .m2 and theoretically it may work but I'd rather not do this if I don't have to.
I am using spring boot 1.2.x and all of them have this problem.
thanks.
I've got two ideas that you might try.
1) It is possible, that this may be manifestation of this bug in STS 3.6.4: https://issuetracker.springsource.com/browse/STS-4085
The depencies you aren't expecting to see may be coming from the maven 'test' scope. (The bug explicitly mentions 'srt/test' but the same happens with jar dependencies). You can verify whether this bug is the cause by using the regular "Run As Java Application" on your main class.
If that works, then it is almost certainly this bug. If it also fails with a similar error then its something else... then try:
2) You must be getting the unwanted tomcat version from somewhere, probably indirectly as dependency of something else.
Try using the m2e 'dependency hierarchy' to find where it came from like so:
open pom.xml
Click the 'Dependency Hierarchy' tab.
Type 'tomcat' in the 'Filter' box.
I finally figured it out.
In my $WORKSPACE/.metadata/.plugins/org.eclipse.m2e.core/workspacestate.properties it lists all poms, jars and wars from my workspace build with the maven plugin. I noticed that a pom in the file points to the exact version tomcat that is being loaded in my spring boot project. Once I deleted these projects from my STS I can successfully launch the spring boot app :-)
When I re-import the maven projects back to STS the error occurs again, then disappears when I remove them.
These projects have no connection to the project that I am trying to launch. Therefore I think the bug is in m2e.
I'll file a bug and update this post when it is complete.
thanks #Kris for working through it with me.
Im building an application based on Spring Boot v1.2. While my application boots successfully and executes well (so far.. ), I'm unable to test using the spring boot framework because of an AbstractMethodError.
The last few lines of the trace are as below
Caused by: java.lang.AbstractMethodError: org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor.postProcess(Lorg/springframework/aop/framework/ProxyFactory;Lorg/springframework/data/repository/core/RepositoryInformation;)V
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:185)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:239)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:225)
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:84)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1627)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1564)
... 55 more
To analyze the above error, I checked the jar files from classpath involving the above classes. So the info is available as below
jar:file:/C:/rearch/intellij-workspace/springbootproj/lib/spring-aop-4.1.2.RELEASE.jar!/org/springframework/aop/framework/ProxyFactory.class
jar:file:/C:/rearch/mavenrepo/org/springframework/data/spring-data-commons/1.9.1.RELEASE/spring-data-commons-1.9.1.RELEASE.jar!/org/springframework/data/repository/core/RepositoryInformation.class
jar:file:/C:/rearch/intellij-workspace/springbootproj/lib/spring-data-jpa-1.3.3.jar!/org/springframework/data/jpa/repository/support/LockModeRepositoryPostProcessor.class
jar:file:/C:/rearch/intellij-workspace/springbootproj/lib/spring-test-4.1.2.RELEASE.jar!/org/springframework/test/context/support/DependencyInjectionTestExecutionListener.class
I'm not exactly sure on why spring-data-commons is coming up from maven repostory folder, while the others are being served from the project library.
While I debug that, I meanwhile need your help in figuring out the version compatibility between the above libraries.
I wasnt able to exactly pin point on what exactly is causing the error. Please help!
Thanks
The issue was with the intellij configuration of libraries which conflicts with Spring boot application. I manually replaced the required libraries from Maven repository and that worked out for me.
Per request from Elron..
Open the project folder in explorer and verify if the third party library versions in your project matches the ones you actually expect it to be. If something doesnt match, just replace the file with the one you expect it to be. In my case, since I use Maven, I didnt see a need for explicitly saving those libraries in a new lib folder under the project. So, I just deleted all of the files inside the lib folder and things started working again.
For fix this error, change the spring-data-jpa version to 1.5.0.RELEASE
I have faced this issue .
Get rid of spring-data-commons and change spring-data-jpa version to 1.9.0.RELEASE.
For more details , please follow this link :-
Spring Data Rest PagingAndSortingRepository AbstractMethodError (RepositoryFactorySupport)
I'm trying Spring Batch Quick Start from Spring site (Spring Boot Quick Start) but I can't get it to work:
end() method in SimpleJobBuilder (see job method in BatchConfiguration class) is missing
When I run the main class (removing the reference to end method), Spring Boot starts up (I see the logs in the console) but the job it's not getting executed; from docs around the web I saw that the job should start as soon as the SpringApplication is run
There is something terribly wrong in Spring Batch Quick Start or there's something terribly wrong in what I'm doing?
I think it's useless to publish my code: it's copied from Spring Batch Quick Start...
Thanks for your help!
I think that little sample might be incomplete. For instance you would need #Enable AutoConfiguration in order to get a job to run on start up. There's a more extensive example here, if it helps: https://spring.io/guides/gs/batch-processing/.
In step one of the Spring Batch quick started, the guide asked to add this(the dependency below) into the pom.xml but it errored when there's no version provided. Reason being is that the guide didn't include the parent dependency. So the annotations and the java objects do not know where to look.
I got the quick guide to work by directly including the spring-boot-starter dependency. Then the app ran.. A lot of the spring framework guides seem to assume a strong knowledge in project management and comprehension tool.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
I am using Netbeans as my IDE, currently developing an Web app using:
Spring 3
Hibernate 3
MySQL
I'm relying on netbeans to build the project(in contrast to others using maven). On deployment, the console shows this error:
...noClassDefFoundError: com/mchange/v2/c3p0/DataSources
I've already added the jar file to the Hibernate library.
(And oh, this is my first time asking here. Needed 10 points to post the screenshot.)
So I'm confused why would it need THAT class. (whatever that class does.)
Ideas why did this happen?
I've finally manage to solve the problem. The c3p0 distribution has 3 .jar files on the lib directory. I initially added the "c3p0*.jar" only. Which in turn produces the error.
It needs the OTHER jar file, mchange-commons*.jar in the directory. Hope this helps to others stuck in here.
Download this jar mchange-commons-java-0.2.3.4.jar. This helps me to resolve the issue.
C3P0 is used to support connection pooling. See http://www.mchange.com/projects/c3p0/ for further information on C3P0 and https://community.jboss.org/wiki/HowToConfigureTheC3P0ConnectionPool for information on configuring C3P0 with Hibernate.
Add this jar file "c3p0-0.9.2.1.jar" to library
If you are still getting the error, you need to remove and add again Hibernate library because this "c3p0-0.9.2.1.jar" is conflict version with c3p0 in Hibernate library