I have a problem while loading my jar file at run time.
My hotel.jar is loaded and a method of it (makeReservation) is invoked using the following code:
File file = new File("c:/ComponentFiles/hotel.jar");
URL jarfile = new URL("jar", "", "file:" + file.getAbsolutePath() + "!/");
URLClassLoader cl = URLClassLoader.newInstance(new URL[]{jarfile});
Class componentClass = cl.loadClass("HotelPackage.HotelMgt");
Object componentObject = componentClass.newInstance();
Method setMethod = componentClass.getDeclaredMethod("makeReservation", null);
setMethod.invoke(componentObject, null);
The problem is in the class HotelPackage.HotelMgt of my jar file , I have a class variable of another class (HotelPackage.Hotel) which is in another jar file.
I tried to open and load the other jar file with the same code as above but I receive the exception that cannot find the class def.:
Exception in thread "main" java.lang.NoClassDefFoundError: BeanPackage/Hotel
what is the solution?
You can specify dependencies between JARs by defining the Class-Path property in the JARs' manifest files. Then the JVM will load the dependency JARs automatically as needed.
More information is here: http://java.sun.com/docs/books/tutorial/deployment/jar/downman.html
Thanks, but I found another solution that really works. Since I know whole the component series that are going to work with each other, I load them all with one class loader instance (array of URLs). then the classloader itself manages the dependencies.
Related
I need help understanding the error message, which is along the lines of changing the file name to json because the configuration fails. I have a long error message but pasted the part that is mostly repeated throughout the message:
/Users/kyra/Documents/GitHub/habitat-sim/matterport/scans/house1/8194nk5LbLH 13/poisson_meshes/8194nk5LbLH_10.stage_config.json
I0412 19:04:17.735939 42397184 AttributesManagerBase.h:296] AttributesManager::createFromJsonOrDefaultInternal (Stage) : Proposing JSON name : /Users/kyra/Documents/GitHub/habitat-sim/matterport/scans/house1/8194nk5LbLH 13/poisson_meshes/8194nk5LbLH_10.stage_config.json from original name : /Users/kyra/Documents/GitHub/habitat-sim/matterport/scans/house1/8194nk5LbLH 13/poisson_meshes/8194nk5LbLH_10.ply | This file does not exist.
I0412 19:04:17.736085 42397184 AbstractObjectAttributesManagerBase.h:182] AbstractObjectAttributesManager::createObject (Stage) : Done making attributes with handle : /Users/kyra/Documents/GitHub/habitat-sim/matterport/scans/house1/8194nk5LbLH 13/poisson_meshes/8194nk5LbLH_10.ply
I0412 19:04:17.736093 42397184 AbstractObjectAttributesManagerBase.h:189] File (/Users/kyra/Documents/GitHub/habitat-sim/matterport/scans/house1/8194nk5LbLH 13/poisson_meshes/8194nk5LbLH_10.ply) exists but is not a recognized config filename extension, so new default Stage attributes created and registered.
I0412 19:04:17.736124 42397184 SceneDatasetAttributes.cpp:46]
What I did: Ran image extractor after activating Conda env. I modified the image extractor to change the file path to point to a .ply file in the matterport dataset.
Setup: 1)Facebook's AI Habitat-sim built from source,
2)MacBook Air M1,
3)Conda environment with the dependencies (using pip install -r requirements.txt) but habitat-sim is not installed by Conda,
4)Matterport3D dataset (downloaded one house).
Thank you.
I have a file in a location:
/resources/static/fcm-admin
It's absolute path: /home/jitu/project-name/src/main/resources/static/fcm-admin
I have tried to access this file in the following ways
val file = ResourceUtils.getFile("classpath:fcm-admin")
It gives me an error
java.io.FileNotFoundException: class path resource [fcm-admin] cannot be resolved to an absolute file path because it does not exist
I have tried to access the file in various ways but it is not working. I just want to the access file fcm-admin without giving the full absolute path. Anything will be helpful
EDIT:
So I'm able to access the file on local with the below code -
val file = ResourceUtils.getFile("classpath:static/fcm-admin")
But I'm not able to access it on the production server. And I'm getting below exception
class path resource [static/fcm-admin] cannot be resolved to an absolute file path because it does not reside in the file system: jar:file:/var/app/current/application.jar!/BOOT-INF/classes!/static/apple-app-site-association
You forgot to add static in the path
val file = ResourceUtils.getFile("classpath:static/fcm-admin")
EDIT because of comment
Load your file from Classpath:
val file = this.javaClass.classLoader.getResource("/static/fcm-admin").file;
When you load a resource using the class loader it will be start in the root of your classpath.
Local server can work with ClassPathResource but will fail on production
To solve error on production, change your code to
import org.springframework.core.io.ResourceLoader;
import java.io.InputStream;
import org.springframework.core.io.InputStreamSource;
import org.springframework.core.io.ByteArrayResource;
import org.apache.commons.io.IOUtils;
#Autowired
private ResourceLoader resourceLoader;
InputStream logoFileStrem = resourceLoader.getResource("classpath:static/images/image.png").getInputStream();
InputStreamSource byteArrayResource = new ByteArrayResource(org.apache.commons.io.IOUtils.toByteArray(logoFileStrem));
I spent so many time, lot of code work on dev but not on prod.
I used SpringBoot with war in production.
To load a file in resources/static the only solution who work in dev and in prod :
val inputStream = Thread.currentThread().contextClassLoader.getResourceAsStream("static/pathToTourFile/nameofFile.extension")
val texte :String = inputStream.bufferedReader().use(BufferedReader::readText)
I have a small project that i'm using shadowJar to create a fatjar to run from command line..
the main class entry point gets ref to class in the project using static factory method like this
static void main (args){
MessageSystemClient mclient = MessagePlatformFactoryProducer.getFactory().getMessagePlatformInstance("WLS")
println "howdi "....
}
when i run the fat jar at the command line i get an error like so
PS D:\Intellij-projects\message-platform-client\build\libs> java -jar message-platform-client-1.0-SNAPSHOT.jar --send "hello" -r
Exception in thread "main" java.io.FileNotFoundException: file:\D:\Intellij-projects\message-platform-client\build\libs\message-platform-client-1.0-SNAPSHOT.jar!\ApplicationConfig.groovy (The filename, directory name, or volume label syntax is incorrect)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at groovy.util.CharsetToolkit.<init>(CharsetToolkit.java:77)
at org.codehaus.groovy.runtime.ResourceGroovyMethods.newReader(ResourceGroovyMethods.java:1741)
at org.codehaus.groovy.runtime.ResourceGroovyMethods.getText(ResourceGroovyMethods.java:592)
at org.codehaus.groovy.runtime.dgm$1013.doMethodInvoke(Unknown Source)
at org.codehaus.groovy.reflection.GeneratedMetaMethod$Proxy.doMethodInvoke(GeneratedMetaMethod.java:83)
at org.codehaus.groovy.runtime.metaclass.MethodMetaProperty$GetBeanMethodMetaProperty.getProperty(MethodMetaProperty.java:76)
at org.codehaus.groovy.runtime.callsite.GetEffectivePojoPropertySite.getProperty(GetEffectivePojoPropertySite.java:63)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:298)
at com.softwood.implementation.MessagePlatformFactory.getMessagePlatformInstance(MessagePlatformFactory.groovy:29)
at com.softwood.client.AbstractMessagePlatformFactory$getMessagePlatformInstance.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127)
at com.softwood.cli.Launcher.main(Launcher.groovy:40)
however if i comment out the static factory call - and regenerate then the fat jar runs ok and prints the howdi to the console.
if i uncomment the factory lookup again, and just run the Launcher class in the IDE the code works fine with no problems
so why is it failing as a fatjar, but works as ordinary project?. secondly assuming its something to do with fatjar zip approach - how do i overcome this ?
I had a earlier version of the project that just directly called static methods on project classes, and that works fine as a fatjar - so the problem is with the static factory behavior inside a fatjar .
i tried to load the classes using
Launcher.getClass().getClassLoader().loadClass ("<various factory classes etc>")
the classes would load ok - but the factory call itself still breaks as shown above in stack trace
Can any one help me over this problem please?
Found it - in my factory methods I was doing a call like this to load a configFile:
File configFile = new File(classLoader.getResource("ApplicationConfig.groovy")?.getFile())
However as per related link, this won't work in a fat jar as there's no full file system in the jar.
What you have to do is use line like:
InputStream configStream = classLoader.getResourceAsStream("ApplicationConfig.groovy")
as this will work in the jar, and test if stream is null (can't find your resource in the fatjar) or you get the stream itself which you can read the text from the file.
Took a while, but now back on I think.
This is my data structure
WEBVTT
00:00:15.000 --> 00:00:17.951
At the left we can see...
00:00:18.166 --> 00:00:20.083
At the right we can see the...
00:00:20.119 --> 00:00:21.962
...the head-snarlers
I am trying to parse a web vtt file. For this I wrote :
var data = require('./captions.en.vtt');
Error
client:47 ./src/captions.en.vtt
Module parse failed: C:\Users\sampr\Desktop\MyVIew\WebVtt\src\captions.en.vtt Invalid number (3:0)
You may need an appropriate loader to handle this file type.
Could someone please help me?
You need a appropriate loader for the file type (.vtt).
Install file-loader (npm install --save-dev file-loader) and you could use it directly like this:
var data = require('file-loader!./captions.en.vtt');
Using Next.js, I ended up using this solution.
...add a file called staticdata.js inside the pages/api folder. This will create a Serverless Function that will load the json data from the file, and return it as a response.
Basically the solution is to return the data from an API endpoint.
I've created a new converter with the following structure:
package com.mycompany;
#Converter
public final class MyCustomConverter {
#Converter
public static TypeB convert(TypeA typeA) {
// do the conversion
}
}
I've also created in my src/main/java/resources folder the following package, META-INF.services.org.apache.camel and within that a TypeConverter file which just says:
com.mycompany
Within my route from TypeA I have got:
<convertBodyTo type="com.mycompany.TypeB" />
Yet my tests constantly fail to pick up the file and thus cannot find the converter, with the exception being:
Caused by: org.apache.camel.NoTypeConversionAvailableException: No
type converter available to convert from type: com.mycompany.TypeA to
the required type: com.mycompany.TypeB with value TypeA[value1="blah"]
Am I meant to do something else to get my test to pick up the TypeConverter file? Surely putting it in that resources folder with the exact structure adds it to the classpath and so it would be accessible.
Its recommended in the TypeConverter file to list the FQN of all the type conveters, eg
com.mycompany
Should be
com.mycompany.MyCustomConverter
This is also what we say on this page: http://camel.apache.org/type-converter.html
And could you check inside the generated JAR file of yours, that the META-INF/services/org/apache/camel directory is there, and that the TypeConverter file is present (and it is not in some directory like META-INF/org.apache.camel).
Also what is the runtime environment you use? Do you run Camel standalone, Tomcat, OSGi or something else?