I am trying to load a JSON file sample.json from src/main/resources
directory.
I have to map that json to a Java Object. And my application is reactive, I am using Spring webflux.
I have followed Simon's Blog to come up with this:
SimpleModule module = new SimpleModule();
module.addDeserializer(OffsetDateTime.class, new JsonDeserializer<>() {
@Override
public OffsetDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
return OffsetDateTime.parse(p.getValueAsString());
}
});
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(module);
return Flux.using(() -> Files.lines(Paths.get(ClassLoader.getSystemResource("sample.json").toURI())),
Flux::fromStream,
BaseStream::close
)
.collectList()
.map(lines -> String.join("\n", lines))
.map(jsonContent -> {
try {
return objectMapper.readValue(jsonContent, MyPojo.class);
} catch (JsonProcessingException e) {
e.printStackTrace();
return null;
}
})
.map(MyPojo::getValues());
This works fine in local but fails when running inside a docker container. (I am using gradle build to build the jar file and then build the docker image from it)
Part of the error stacktrace:
java.nio.file.FileSystemNotFoundException: null at jdk.zipfs/jdk.nio.zipfs.ZipFileSystemProvider.getFileSystem(ZipFileSystemProvider.java:169) ~[jdk.zipfs:na] Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: