Exception while creating PDF file from Asciidoctor

[kkgv]

I am getting exception while creating pdf file from ascii doc files using the following libraries in Spring boot application.

org.asciidoctor:asciidoctorj:1.6.0-alpha.3
org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.11
org.asciidoctor:asciidoctorj-epub3:1.5.0-alpha.6

I found similar issues reported earlier tried by setting class loader but no success.

The exception shown is

org.jruby.exceptions.RaiseException: (LoadError) no such file to load -- asciidoctor
         at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:944) ~[jruby-core-9.1.2.0.jar!/:?]
         at RUBY.require(uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:55) ~[?:?]
         at RUBY.<top>(<script>:9) ~[?:?]

My code looks like this. The path is the directory where ascii doc are stored.

    final Asciidoctor asciidoctor = create();
    asciidoctor.renderDirectory(new AsciiDocDirectoryWalker(path), options().backend("pdf").get());
    asciidoctor.shutdown();

This issue raised with project 'asciidoctorj ' (asciidoctor/asciidoctorj#532). But the response I got from them is it is Spring boot class loader related.

[wilkinsona]

Asciidoctor and JRuby don't like being run from a nested jar file so you need to configure your build to unpack the nested jars to a temporary location. Here's an example from Sagan (http://spring.io): https://github.com/spring-io/sagan/blob/dc100df311a0aa0b7e09b6aae1ede2f06abcbc9c/sagan-site/build.gradle#L7

[kkgv]

Thanks for the quick response. I tried with 'requiresUnpack' but still getting same exception.

[wilkinsona]

@kkgv Please provide a small sample application that reproduces the problem

[kkgv]

Configuration class

`package uk.co.doc.config;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

import static org.springframework.boot.SpringApplication.run;

@SpringBootApplication
@componentscan("uk.co.doc")
@EnableAutoConfiguration
@configuration
public class PdfConversionApplication {

public static void main(final String[] args) {
    run(PdfConversionApplication.class, args);
}

}`

Controller class

`package uk.co.doc.controller;

import org.asciidoctor.AsciiDocDirectoryWalker;
import org.asciidoctor.Asciidoctor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.io.File;

import static org.asciidoctor.Asciidoctor.Factory.create;
import static org.asciidoctor.OptionsBuilder.options;

@RestController
public class PdfConversionController {
private static final Logger LOGGER = LoggerFactory.getLogger(PdfConversionController.class);

@RequestMapping(value = "/createPdfDocument", method = RequestMethod.GET)
public void downloadApiDocument(final HttpServletResponse response) {
    LOGGER.info("Start of Download API method");
    try {
        generateAPIPdfFiles();
    } catch (final Exception e) {
        LOGGER.error("Failed to generate pdf documents", e);
    }
}

private void generateAPIPdfFiles() {
    final Asciidoctor asciidoctor = create();
    LOGGER.info("Asciidoctor instance created");
    final AsciiDocDirectoryWalker asciiDocDirectoryWalker = new AsciiDocDirectoryWalker("c:/output");
    for(final File file  : asciiDocDirectoryWalker.scan()) {
        LOGGER.info("File available in output folder " + file.getPath());
    }
    asciidoctor.renderDirectory(new AsciiDocDirectoryWalker("c:/output"), options().backend("pdf").get());
    asciidoctor.shutdown();
}

}`

build.gradle
`group 'uk.co.doc'
version '1.0-SNAPSHOT'

apply plugin: 'java'
apply plugin: 'spring-boot'

sourceCompatibility = 1.8

configurations {
compile.exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'
testCompile.exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'
}

jar {
baseName = 'pdf-conversion'
}

buildscript {
repositories {
mavenCentral()
jcenter()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.4.1.RELEASE")
}
}

repositories {
mavenCentral()
jcenter()
}

dependencies {
compile('org.springframework.boot:spring-boot-starter-data-rest')
compile('org.asciidoctor:asciidoctorj:1.5.4.1')
compile('org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.11')
compile('org.asciidoctor:asciidoctorj-epub3:1.5.0-alpha.6')
compile('org.springframework.boot:spring-boot-starter-log4j2')
testCompile group: 'junit', name: 'junit', version: '4.11'
}

springBoot {
mainClass = 'uk.co.doc.config.PdfConversionApplication'
requiresUnpack = ['org.jruby:jruby-complete', 'org.asciidoctor:asciidoctorj']
}`

application.yaml

`info:
component: PDF conversion MicroServices

server:
port: 8080`

*Sample adoc file content (create sample adoc [Sample.adoc ] file under output folder and add the following content *

= Connect authorisation services

[[_overview]]
== Overview
Connect authorisation services

[wilkinsona]

@kkgv Thanks, but it's not very easy to piece together an application from a comment (especially when the formatting is wrong). Can you please share a zip file or Git repository containing an application that I can unzip/clone and run?