Build flowable as a spring boot package which would start all 5 web applications about flowable-engine

[tijsrademakers]

There's no plan to work on this, so closing the issue. We are looking at Docker images instead.

[mgrouch]

Here is how it is working for me:

package org.flowable;

import org.apache.catalina.Context;
import org.apache.catalina.loader.WebappLoader;
import org.apache.catalina.startup.HostConfig;
import org.apache.catalina.startup.Tomcat;

import javax.servlet.ServletException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;

public class WebLauncher
{
    private static final String BASEDIR = ".";
    private static final String DOC_BASE = "webapps";
    private static final String BOOT_INF_LIB = "/BOOT-INF/lib/";

    public static void main(String[] args) throws Exception
    {
        String version  = WebLauncher.class.getPackage().getImplementationVersion();

        Tomcat tomcat = new Tomcat();
        tomcat.setPort(8080);
        tomcat.setBaseDir(BASEDIR);

        addWebApps("flowable-ui-idm-app-", "/flowable-idm", version, tomcat);
        addWebApps("flowable-ui-admin-", "/flowable-admin", version, tomcat);
        addWebApps("flowable-ui-task-app-", "/flowable-task", version, tomcat);
        addWebApps("flowable-ui-modeler-app-", "/flowable-modeler", version, tomcat);
        addWebApps("flowable-app-rest-", "/flowable-rest", version, tomcat);

        tomcat.start();
        tomcat.getServer().await();
    }

    private static void addWebApps(String app, String contextRoot, String version, Tomcat tomcat)
            throws IOException, ServletException
    {
        final String warName = makeWarName(app, version);

        final String docBaseDir = BASEDIR + "/" + DOC_BASE;
        final File docBaseDirFile = new File(docBaseDir);
        if (!docBaseDirFile.exists())
        {
            docBaseDirFile.mkdir();
        }

        File file = extractWarFile(warName, docBaseDir);

        Context context = tomcat.addWebapp(contextRoot, file.getAbsolutePath());
        context.setReloadable(false);
        context.setParentClassLoader(tomcat.getHost().getParentClassLoader());
        WebappLoader loader = new WebappLoader(tomcat.getClass().getClassLoader());
        context.setLoader(loader);
    }

    private static File extractWarFile(String warName, String docBaseDir) throws IOException
    {
        File file = new File(docBaseDir, warName);
        if (!file.exists())
        {
            InputStream link = (WebLauncher.class.getResourceAsStream(BOOT_INF_LIB + warName));
            Files.copy(link, file.getAbsoluteFile().toPath());
        }
        return file;
    }

    private static String makeWarName(String app, String version)
    {
        return app + version + ".war";
    }
}

Here is pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <artifactId>flowable-boot</artifactId>
    <packaging>jar</packaging>
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.flowable</groupId>
        <artifactId>flowable-parent</artifactId>
        <version>6.0.0-SNAPSHOT</version>
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot</artifactId>
                <version>${spring-boot.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
                <version>${spring-boot.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-log4j</artifactId>
                <version>${spring-boot.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>

        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-core</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-util</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-coyote</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-api</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jdbc</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-dbcp</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-servlet-api</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jsp-api</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper-el</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-el-api</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-catalina</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-tribes</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-catalina-ha</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-annotations-api</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-juli</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-logging-juli</artifactId>
            <version>${tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-logging-log4j</artifactId>
            <version>${tomcat.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-ui-idm-app</artifactId>
            <version>${project.version}</version>
            <type>war</type>
        </dependency>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-ui-admin</artifactId>
            <version>${project.version}</version>
            <type>war</type>
        </dependency>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-ui-task-app</artifactId>
            <version>${project.version}</version>
            <type>war</type>
        </dependency>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-ui-modeler-app</artifactId>
            <version>${project.version}</version>
            <type>war</type>
        </dependency>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-app-rest</artifactId>
            <version>${project.version}</version>
            <type>war</type>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-clean-plugin</artifactId>
                <version>2.4.1</version>
                <configuration>
                    <filesets>
                        <fileset>
                            <directory>${project.basedir}</directory>
                            <includes>
                                <include>work/**</include>
                                <include>webapps/**</include>
                                <include>conf/**</include>
                                <include>data/**</include>
                            </includes>
                            <followSymlinks>false</followSymlinks>
                        </fileset>
                    </filesets>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>${flowable.mainClass}</mainClass>
                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <mainClass>${flowable.mainClass}</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <properties>
        <tomcat.version>8.0.26</tomcat.version>
        <compileSource>1.8</compileSource>
        <spring-boot.version>1.4.3.RELEASE</spring-boot.version>
        <spring.version>4.3.5.RELEASE</spring.version>
        <flowable.mainClass>org.flowable.WebLauncher</flowable.mainClass>
    </properties>
</project>

and the start script

#!/bin/sh


java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8800 -jar  target/flowable-boot*.jar --debug