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 # Docker container for HBP-Lucene/Solr #
 
 Copyright (c) 2017-2018 2017 [DIAS](https://dias.epfl.ch/BrainDB) laboratory
 
 ---
 
 This project creates a lightweight Docker image of a customized *Lucene/Solr* implementation ([HBP-Lucene/Solr](https://bitbucket.org/sakurad/hbp-lucene-solr)) for running HBP Spatial Search Service (API).
 
 ---
 
 ## Quick-start ##
 
+**0. Prerequisites**
+
+First, Java SDK is required for Lucene/Solr compilation:
+```sh
+$ sudo apt-get update
+$ sudo apt-get install default-jdk # On Ubuntu, this will install OpenJDK 8 (the latest and recommended version)
+```
+Then you need to set `JAVA_HOME` with the path of your preferred installation and set it in `/etc/environment`:
+```sh
+$ sudo update-alternatives --config java # will list all available Java installations
+$ sudo emacs /etc/environment # add 2 lines: "JAVA_HOME=/usr/lib/jvm/default-java/jre" and "export JAVA_HOME"
+$ source /etc/environment
+```
+
+Also Ant:
+```sh
+# sudo apt-get install ant
+```
+
 **1. Clone this project**  
 ```sh
 $ git clone git@bitbucket.org:sakurad/hbp-lucene-solr-docker.git
 $ cd hbp-lucene-solr-docker
 ```
 
 **2. Clone the HBP-Lucene/Solr sources and build it**  
 ```sh
 $ git clone git@bitbucket.org:sakurad/hbp-lucene-solr.git src/hbp-lucene-solr
-$ cd src/hbp-lucene-solr && ant compile && cd solr && ant package && cd ../../../
+$ cd src/hbp-lucene-solr && ant ivy-bootstrap && ant compile && cd solr && ant package && cd ../../../
 ```  
 
 **3. Build the docker image**  
 ```sh
 $ docker build -t hpb-lucene-solr \
 #   --build-arg JOBS=8 \
     --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
     --build-arg VCS_REF=`git -C ./src/ rev-parse --short HEAD` \
     .
 ```
 
 **_Note:_**
 
 * If you update the sources, add `--no-cache=true` to the command above to take the new version in consideration.
 * Option `-t , --tag list`: Name and optionally a tag in the 'name:tag' format
 * Replace the `8` in `JOBS=8` with the number of CPU threads to reduce the build time on your machine.
 
 **4. Use the built image**  
 ```sh
 $ docker run --rm --name my-hbp-solr -d -p 8983:8983 hbp-lucene-solr
 ```
 
 ## Using a custom `SOLR_HOME` (outside container)  ##
 ---
 
 To use a custom *Solr home* directory directory on the host system (outside the container), we can employ a `SOLR_HOME` environment variable by setting it to the desired location (which is now inside the container in its default location at `/opt/hbp-lucene-solr/server/solr`). We support this in hbp-lucene-solr-docker, in combination with volumes:  
 ```sh
 docker run -it -v $PWD/mysolrhome:/mysolrhome -e SOLR_HOME=/mysolrhome hbp-lucene-solr
 ```
 
 This does need a pre-configured directory at that location (`/mysolrhome`).
 
 As such, hbp-lucene-solr-docker supports a `INIT_SOLR_HOME` setting, which 
 copies the contents from the default directory in the image to the `SOLR_HOME` 
 (the newly specified must be empty).  
 ```sh
 $ mkdir -p docker-volumes/hbp-solr1
 $ sudo chown 8983:8983 docker-volumes/hbp-solr1
 $ docker run -it -v $PWD/docker-volumes/hbp-solr1:/hbp-solr1 \
              -e SOLR_HOME=/hbp-solr1 -e INIT_SOLR_HOME=yes \
              hbp-lucene-solr
 ```
 
 ## Putting it all together ##
 ---
 
 The following is used to run the Spatial Search API in production mode:  
 ```sh
 $ mkdir -p docker-volumes/hbp-solr1
 $ sudo chown 8983:8983 docker-volumes/hbp-solr1
 $ docker run \
   --name my-hbp-solr \
   -d \
   -p 8983:8983 \
   -it \
   -v $PWD/docker-volumes/hbp-solr1:/hbp-solr1 \
   -e SOLR_HOME=/hbp-solr1 \
   -e INIT_SOLR_HOME=yes \
   -e SOLR_HEAP=12g \
   hbp-lucene-solr
 ```
 
 Note increased memory size (12GB).