Read txt file from resources folder on maven Quarkus project From Docker Container

Question

I have one project to parse some info from a large file.

The project uses maven and java:

And the structure bellow:

When I run the application from my IDEA, I can read the file with:

public  void buffer() throws IOException {
    try (InputStream inputStream = getClass().getResourceAsStream("/151279.txt");
         BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
        String contents = reader.lines()
                .collect(Collectors.joining(System.lineSeparator()));
    }
}

Then, if I run:

 ./mvnw package 
java -jar target/file-parser-1.0-SNAPSHOT-runner.jar

Everything goes well.

Even when I generate the GraalNative jar and run the application from the native generate jar with:

./mvnw package -Pnative -Dquarkus.native.container-build=true

java -jar target/file-parser-1.0-SNAPSHOT-native-image-source-jar/file-parser-1.0-SNAPSHOT-runner.jar

it all works Well.

But then, when I run the commands to build and run with docker, is where I got my error:

docker build -f src/main/docker/Dockerfile.native -t quarkus/file-parser 

docker run -i --rm -p 8080:8080 quarkus/file-parser

2020-03-16 17:48:04,908 ERROR [io.qua.ver.htt.run.QuarkusErrorHandler] (executor-thread-1) HTTP Request to /init failed, error id: 8471ff6c-f124-4e0f-9d83-afe7f066b3a8-1: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
    at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:106)
    at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:372)
    at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:209)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:496)
    at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:252)
    at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:153)
    at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:363)
    at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:156)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:238)
    at io.quarkus.resteasy.runtime.standalone.RequestDispatcher.service(RequestDispatcher.java:73)
    at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.dispatch(VertxRequestHandler.java:120)
    at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.access$000(VertxRequestHandler.java:36)
    at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler$1.run(VertxRequestHandler.java:85)
    at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2011)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1535)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1395)
    at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
    at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
    at java.lang.Thread.run(Thread.java:748)
    at org.jboss.threads.JBossThread.run(JBossThread.java:479)
    at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:460)
    at com.oracle.svm.core.posix.thread.PosixJavaThreads.pthreadStartRoutine(PosixJavaThreads.java:193)
Caused by: java.lang.NullPointerException
    at java.io.Reader.<init>(Reader.java:78)
    at java.io.InputStreamReader.<init>(InputStreamReader.java:72)
    at com.erickmob.fileparser.service.ParseService.buffer(ParseService.java:74)
    at com.erickmob.fileparser.service.ParseService_ClientProxy.buffer(ParseService_ClientProxy.zig:98)
    at com.erickmob.fileparser.resource.ParseResource.hello(ParseResource.java:27)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:151)
    at org.jboss.resteasy.core.MethodInjectorImpl.lambda$invoke$3(MethodInjectorImpl.java:122)
    at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616)
    at java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:628)
    at java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:1996)
    at java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:110)
    at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:122)
    at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:594)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:468)
    at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$2(ResourceMethodInvoker.java:421)
    at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:363)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:423)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:391)
    at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invoke$1(ResourceMethodInvoker.java:365)
    at java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:995)
    at java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2137)
    at java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:110)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:365)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:477)
    ... 19 more

Does anyone can help me with this? How can I read a txt file on src/main/resources on a Docker Container?

Dockerfile.Native:

####
# This Dockerfile is used in order to build a container that runs the Quarkus application in native (no JVM) mode
#
# Before building the docker image run:
#
# mvn package -Pnative -Dquarkus.native.container-build=true
#
# Then, build the image with:
#
# docker build -f src/main/docker/Dockerfile.native -t quarkus/file-parser .
#
# Then run the container using:
#
# docker run -i --rm -p 8080:8080 quarkus/file-parser
#
###
FROM registry.access.redhat.com/ubi8/ubi-minimal:8.1
WORKDIR /work/
COPY target/*-runner /work/application

# set up permissions for user `1001`
RUN chmod 775 /work /work/application \
  && chown -R 1001 /work \
  && chmod -R "g+rwX" /work \
  && chown -R 1001:root /work

EXPOSE 8080
USER 1001

CMD ["./application", "-Dquarkus.http.host=0.0.0.0"]

DockerFile.jvm

####
# This Dockerfile is used in order to build a container that runs the Quarkus application in JVM mode
#
# Before building the docker image run:
#
# mvn package
#
# Then, build the image with:
#
# docker build -f src/main/docker/Dockerfile.jvm -t quarkus/file-parser-jvm .
#
# Then run the container using:
#
# docker run -i --rm -p 8080:8080 quarkus/file-parser-jvm
#
###
FROM registry.access.redhat.com/ubi8/ubi-minimal:8.1

ARG JAVA_PACKAGE=java-1.8.0-openjdk-headless
ARG RUN_JAVA_VERSION=1.3.5

ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en'

# Install java and the run-java script
# Also set up permissions for user `1001`
RUN microdnf install openssl curl ca-certificates ${JAVA_PACKAGE} \
    && microdnf update \
    && microdnf clean all \
    && mkdir /deployments \
    && chown 1001 /deployments \
    && chmod "g+rwX" /deployments \
    && chown 1001:root /deployments \
    && curl https://repo1.maven.org/maven2/io/fabric8/run-java-sh/${RUN_JAVA_VERSION}/run-java-sh-${RUN_JAVA_VERSION}-sh.sh -o /deployments/run-java.sh \
    && chown 1001 /deployments/run-java.sh \
    && chmod 540 /deployments/run-java.sh \
    && echo "securerandom.source=file:/dev/urandom" >> /etc/alternatives/jre/lib/security/java.security

# Configure the JAVA_OPTIONS, you can add -XshowSettings:vm to also display the heap size.
ENV JAVA_OPTIONS="-Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager"

COPY target/lib/* /deployments/lib/
COPY target/*-runner.jar /deployments/app.jar

EXPOSE 8080
USER 1001

ENTRYPOINT [ "/deployments/run-java.sh" ]

Refs: https://www.baeldung.com/java-classpath-resource-cannot-be-opened

Answer 1

You need to make sure that the resource is included in the native image (it isn't by default).

Add a src/main/resources/resources-config.json that includes something like:

{
  "resources": [
    {
      "pattern": "151279\\.txt$"
    }
  ]
}

You will also need to set the following property:

quarkus.native.additional-build-args =-H:ResourceConfigurationFiles=resources-config.json

See this for more details.